/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.hardware.radio;
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import android.annotation.NonNull;
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import android.annotation.SystemApi;
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import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.os.Bundle;
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import android.os.Parcel;
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import android.os.Parcelable;
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import android.util.ArrayMap;
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import android.util.Log;
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import android.util.SparseArray;
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import java.util.Set;
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/**
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* Contains meta data about a radio program such as station name, song title, artist etc...
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* @hide
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*/
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@SystemApi
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public final class RadioMetadata implements Parcelable {
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private static final String TAG = "BroadcastRadio.metadata";
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/**
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* The RDS Program Information.
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*/
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public static final String METADATA_KEY_RDS_PI = "android.hardware.radio.metadata.RDS_PI";
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/**
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* The RDS Program Service.
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*/
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public static final String METADATA_KEY_RDS_PS = "android.hardware.radio.metadata.RDS_PS";
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/**
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* The RDS PTY.
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*/
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public static final String METADATA_KEY_RDS_PTY = "android.hardware.radio.metadata.RDS_PTY";
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/**
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* The RBDS PTY.
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*/
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public static final String METADATA_KEY_RBDS_PTY = "android.hardware.radio.metadata.RBDS_PTY";
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/**
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* The RBDS Radio Text.
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*/
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public static final String METADATA_KEY_RDS_RT = "android.hardware.radio.metadata.RDS_RT";
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/**
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* The song title.
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*/
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public static final String METADATA_KEY_TITLE = "android.hardware.radio.metadata.TITLE";
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/**
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* The artist name.
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*/
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public static final String METADATA_KEY_ARTIST = "android.hardware.radio.metadata.ARTIST";
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/**
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* The album name.
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*/
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public static final String METADATA_KEY_ALBUM = "android.hardware.radio.metadata.ALBUM";
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/**
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* The music genre.
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*/
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public static final String METADATA_KEY_GENRE = "android.hardware.radio.metadata.GENRE";
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/**
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* The radio station icon {@link Bitmap}.
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*/
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public static final String METADATA_KEY_ICON = "android.hardware.radio.metadata.ICON";
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/**
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* The artwork for the song/album {@link Bitmap}.
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*/
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public static final String METADATA_KEY_ART = "android.hardware.radio.metadata.ART";
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/**
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* The clock.
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*/
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public static final String METADATA_KEY_CLOCK = "android.hardware.radio.metadata.CLOCK";
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/**
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* Technology-independent program name (station name).
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*/
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public static final String METADATA_KEY_PROGRAM_NAME =
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"android.hardware.radio.metadata.PROGRAM_NAME";
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/**
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* DAB ensemble name.
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*/
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public static final String METADATA_KEY_DAB_ENSEMBLE_NAME =
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"android.hardware.radio.metadata.DAB_ENSEMBLE_NAME";
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/**
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* DAB ensemble name - short version (up to 8 characters).
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*/
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public static final String METADATA_KEY_DAB_ENSEMBLE_NAME_SHORT =
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"android.hardware.radio.metadata.DAB_ENSEMBLE_NAME_SHORT";
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/**
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* DAB service name.
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*/
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public static final String METADATA_KEY_DAB_SERVICE_NAME =
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"android.hardware.radio.metadata.DAB_SERVICE_NAME";
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/**
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* DAB service name - short version (up to 8 characters).
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*/
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public static final String METADATA_KEY_DAB_SERVICE_NAME_SHORT =
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"android.hardware.radio.metadata.DAB_SERVICE_NAME_SHORT";
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/**
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* DAB component name.
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*/
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public static final String METADATA_KEY_DAB_COMPONENT_NAME =
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"android.hardware.radio.metadata.DAB_COMPONENT_NAME";
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/**
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* DAB component name.
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*/
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public static final String METADATA_KEY_DAB_COMPONENT_NAME_SHORT =
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"android.hardware.radio.metadata.DAB_COMPONENT_NAME_SHORT";
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private static final int METADATA_TYPE_INVALID = -1;
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private static final int METADATA_TYPE_INT = 0;
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private static final int METADATA_TYPE_TEXT = 1;
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private static final int METADATA_TYPE_BITMAP = 2;
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private static final int METADATA_TYPE_CLOCK = 3;
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private static final ArrayMap<String, Integer> METADATA_KEYS_TYPE;
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static {
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METADATA_KEYS_TYPE = new ArrayMap<String, Integer>();
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METADATA_KEYS_TYPE.put(METADATA_KEY_RDS_PI, METADATA_TYPE_INT);
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METADATA_KEYS_TYPE.put(METADATA_KEY_RDS_PS, METADATA_TYPE_TEXT);
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METADATA_KEYS_TYPE.put(METADATA_KEY_RDS_PTY, METADATA_TYPE_INT);
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METADATA_KEYS_TYPE.put(METADATA_KEY_RBDS_PTY, METADATA_TYPE_INT);
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METADATA_KEYS_TYPE.put(METADATA_KEY_RDS_RT, METADATA_TYPE_TEXT);
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METADATA_KEYS_TYPE.put(METADATA_KEY_TITLE, METADATA_TYPE_TEXT);
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METADATA_KEYS_TYPE.put(METADATA_KEY_ARTIST, METADATA_TYPE_TEXT);
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METADATA_KEYS_TYPE.put(METADATA_KEY_ALBUM, METADATA_TYPE_TEXT);
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METADATA_KEYS_TYPE.put(METADATA_KEY_GENRE, METADATA_TYPE_TEXT);
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METADATA_KEYS_TYPE.put(METADATA_KEY_ICON, METADATA_TYPE_BITMAP);
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METADATA_KEYS_TYPE.put(METADATA_KEY_ART, METADATA_TYPE_BITMAP);
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METADATA_KEYS_TYPE.put(METADATA_KEY_CLOCK, METADATA_TYPE_CLOCK);
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METADATA_KEYS_TYPE.put(METADATA_KEY_PROGRAM_NAME, METADATA_TYPE_TEXT);
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METADATA_KEYS_TYPE.put(METADATA_KEY_DAB_ENSEMBLE_NAME, METADATA_TYPE_TEXT);
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METADATA_KEYS_TYPE.put(METADATA_KEY_DAB_ENSEMBLE_NAME_SHORT, METADATA_TYPE_TEXT);
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METADATA_KEYS_TYPE.put(METADATA_KEY_DAB_SERVICE_NAME, METADATA_TYPE_TEXT);
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METADATA_KEYS_TYPE.put(METADATA_KEY_DAB_SERVICE_NAME_SHORT, METADATA_TYPE_TEXT);
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METADATA_KEYS_TYPE.put(METADATA_KEY_DAB_COMPONENT_NAME, METADATA_TYPE_TEXT);
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METADATA_KEYS_TYPE.put(METADATA_KEY_DAB_COMPONENT_NAME_SHORT, METADATA_TYPE_TEXT);
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}
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// keep in sync with: system/media/radio/include/system/radio_metadata.h
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private static final int NATIVE_KEY_INVALID = -1;
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private static final int NATIVE_KEY_RDS_PI = 0;
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private static final int NATIVE_KEY_RDS_PS = 1;
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private static final int NATIVE_KEY_RDS_PTY = 2;
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private static final int NATIVE_KEY_RBDS_PTY = 3;
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private static final int NATIVE_KEY_RDS_RT = 4;
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private static final int NATIVE_KEY_TITLE = 5;
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private static final int NATIVE_KEY_ARTIST = 6;
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private static final int NATIVE_KEY_ALBUM = 7;
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private static final int NATIVE_KEY_GENRE = 8;
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private static final int NATIVE_KEY_ICON = 9;
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private static final int NATIVE_KEY_ART = 10;
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private static final int NATIVE_KEY_CLOCK = 11;
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private static final SparseArray<String> NATIVE_KEY_MAPPING;
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static {
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NATIVE_KEY_MAPPING = new SparseArray<String>();
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NATIVE_KEY_MAPPING.put(NATIVE_KEY_RDS_PI, METADATA_KEY_RDS_PI);
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NATIVE_KEY_MAPPING.put(NATIVE_KEY_RDS_PS, METADATA_KEY_RDS_PS);
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NATIVE_KEY_MAPPING.put(NATIVE_KEY_RDS_PTY, METADATA_KEY_RDS_PTY);
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NATIVE_KEY_MAPPING.put(NATIVE_KEY_RBDS_PTY, METADATA_KEY_RBDS_PTY);
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NATIVE_KEY_MAPPING.put(NATIVE_KEY_RDS_RT, METADATA_KEY_RDS_RT);
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NATIVE_KEY_MAPPING.put(NATIVE_KEY_TITLE, METADATA_KEY_TITLE);
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NATIVE_KEY_MAPPING.put(NATIVE_KEY_ARTIST, METADATA_KEY_ARTIST);
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NATIVE_KEY_MAPPING.put(NATIVE_KEY_ALBUM, METADATA_KEY_ALBUM);
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NATIVE_KEY_MAPPING.put(NATIVE_KEY_GENRE, METADATA_KEY_GENRE);
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NATIVE_KEY_MAPPING.put(NATIVE_KEY_ICON, METADATA_KEY_ICON);
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NATIVE_KEY_MAPPING.put(NATIVE_KEY_ART, METADATA_KEY_ART);
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NATIVE_KEY_MAPPING.put(NATIVE_KEY_CLOCK, METADATA_KEY_CLOCK);
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}
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/**
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* Provides a Clock that can be used to describe time as provided by the Radio.
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*
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* The clock is defined by the seconds since epoch at the UTC + 0 timezone
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* and timezone offset from UTC + 0 represented in number of minutes.
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*
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* @hide
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*/
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@SystemApi
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public static final class Clock implements Parcelable {
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private final long mUtcEpochSeconds;
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private final int mTimezoneOffsetMinutes;
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public int describeContents() {
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return 0;
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}
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public void writeToParcel(Parcel out, int flags) {
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out.writeLong(mUtcEpochSeconds);
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out.writeInt(mTimezoneOffsetMinutes);
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}
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public static final @android.annotation.NonNull Parcelable.Creator<Clock> CREATOR
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= new Parcelable.Creator<Clock>() {
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public Clock createFromParcel(Parcel in) {
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return new Clock(in);
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}
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public Clock[] newArray(int size) {
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return new Clock[size];
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}
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};
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public Clock(long utcEpochSeconds, int timezoneOffsetMinutes) {
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mUtcEpochSeconds = utcEpochSeconds;
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mTimezoneOffsetMinutes = timezoneOffsetMinutes;
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}
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private Clock(Parcel in) {
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mUtcEpochSeconds = in.readLong();
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mTimezoneOffsetMinutes = in.readInt();
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}
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public long getUtcEpochSeconds() {
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return mUtcEpochSeconds;
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}
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public int getTimezoneOffsetMinutes() {
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return mTimezoneOffsetMinutes;
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}
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}
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private final Bundle mBundle;
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RadioMetadata() {
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mBundle = new Bundle();
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}
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private RadioMetadata(Bundle bundle) {
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mBundle = new Bundle(bundle);
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}
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private RadioMetadata(Parcel in) {
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mBundle = in.readBundle();
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}
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@Override
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public String toString() {
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StringBuilder sb = new StringBuilder("RadioMetadata[");
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final String removePrefix = "android.hardware.radio.metadata";
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boolean first = true;
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for (String key : mBundle.keySet()) {
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if (first) first = false;
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else sb.append(", ");
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String keyDisp = key;
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if (key.startsWith(removePrefix)) keyDisp = key.substring(removePrefix.length());
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sb.append(keyDisp);
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sb.append('=');
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sb.append(mBundle.get(key));
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}
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sb.append("]");
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return sb.toString();
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}
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/**
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* Returns {@code true} if the given key is contained in the meta data
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*
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* @param key a String key
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* @return {@code true} if the key exists in this meta data, {@code false} otherwise
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*/
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public boolean containsKey(String key) {
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return mBundle.containsKey(key);
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}
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/**
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* Returns the text value associated with the given key as a String, or null
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* if the key is not found in the meta data.
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*
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* @param key The key the value is stored under
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* @return a String value, or null
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*/
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public String getString(String key) {
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return mBundle.getString(key);
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}
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private static void putInt(Bundle bundle, String key, int value) {
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int type = METADATA_KEYS_TYPE.getOrDefault(key, METADATA_TYPE_INVALID);
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if (type != METADATA_TYPE_INT && type != METADATA_TYPE_BITMAP) {
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throw new IllegalArgumentException("The " + key + " key cannot be used to put an int");
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}
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bundle.putInt(key, value);
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}
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/**
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* Returns the value associated with the given key,
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* or 0 if the key is not found in the meta data.
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*
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* @param key The key the value is stored under
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* @return an int value
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*/
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public int getInt(String key) {
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return mBundle.getInt(key, 0);
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}
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/**
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* Returns a {@link Bitmap} for the given key or null if the key is not found in the meta data.
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*
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* @param key The key the value is stored under
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* @return a {@link Bitmap} or null
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* @deprecated Use getBitmapId(String) instead
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*/
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@Deprecated
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public Bitmap getBitmap(String key) {
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Bitmap bmp = null;
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try {
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bmp = mBundle.getParcelable(key);
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} catch (Exception e) {
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// ignore, value was not a bitmap
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Log.w(TAG, "Failed to retrieve a key as Bitmap.", e);
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}
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return bmp;
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}
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/**
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* Retrieves an identifier for a bitmap.
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*
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* The format of an identifier is opaque to the application,
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* with a special case of value 0 being invalid.
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* An identifier for a given image-tuner pair is unique, so an application
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* may cache images and determine if there is a necessity to fetch them
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* again - if identifier changes, it means the image has changed.
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*
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* Only bitmap keys may be used with this method:
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* <ul>
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* <li>{@link #METADATA_KEY_ICON}</li>
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* <li>{@link #METADATA_KEY_ART}</li>
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* </ul>
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*
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* @param key The key the value is stored under.
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* @return a bitmap identifier or 0 if it's missing.
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* @hide This API is not thoroughly elaborated yet
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*/
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public int getBitmapId(@NonNull String key) {
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if (!METADATA_KEY_ICON.equals(key) && !METADATA_KEY_ART.equals(key)) return 0;
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return getInt(key);
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}
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public Clock getClock(String key) {
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Clock clock = null;
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try {
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clock = mBundle.getParcelable(key);
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} catch (Exception e) {
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// ignore, value was not a clock.
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Log.w(TAG, "Failed to retrieve a key as Clock.", e);
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}
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return clock;
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}
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@Override
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public int describeContents() {
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return 0;
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}
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@Override
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public void writeToParcel(Parcel dest, int flags) {
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dest.writeBundle(mBundle);
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}
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/**
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* Returns the number of fields in this meta data.
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*
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* @return the number of fields in the meta data.
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*/
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public int size() {
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return mBundle.size();
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}
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/**
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* Returns a Set containing the Strings used as keys in this meta data.
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*
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* @return a Set of String keys
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*/
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public Set<String> keySet() {
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return mBundle.keySet();
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}
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/**
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* Helper for getting the String key used by {@link RadioMetadata} from the
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* corrsponding native integer key.
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*
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* @param editorKey The key used by the editor
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* @return the key used by this class or null if no mapping exists
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* @hide
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*/
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public static String getKeyFromNativeKey(int nativeKey) {
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return NATIVE_KEY_MAPPING.get(nativeKey, null);
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}
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public static final @android.annotation.NonNull Parcelable.Creator<RadioMetadata> CREATOR =
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new Parcelable.Creator<RadioMetadata>() {
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@Override
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public RadioMetadata createFromParcel(Parcel in) {
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return new RadioMetadata(in);
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}
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@Override
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public RadioMetadata[] newArray(int size) {
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return new RadioMetadata[size];
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}
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};
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/**
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* Use to build RadioMetadata objects.
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*/
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public static final class Builder {
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private final Bundle mBundle;
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/**
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* Create an empty Builder. Any field that should be included in the
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* {@link RadioMetadata} must be added.
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*/
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public Builder() {
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mBundle = new Bundle();
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}
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/**
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* Create a Builder using a {@link RadioMetadata} instance to set the
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* initial values. All fields in the source meta data will be included in
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* the new meta data. Fields can be overwritten by adding the same key.
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*
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* @param source
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*/
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public Builder(RadioMetadata source) {
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mBundle = new Bundle(source.mBundle);
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}
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/**
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* Create a Builder using a {@link RadioMetadata} instance to set
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* initial values, but replace bitmaps with a scaled down copy if they
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* are larger than maxBitmapSize.
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*
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* @param source The original meta data to copy.
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* @param maxBitmapSize The maximum height/width for bitmaps contained
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* in the meta data.
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* @hide
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*/
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public Builder(RadioMetadata source, int maxBitmapSize) {
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this(source);
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for (String key : mBundle.keySet()) {
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Object value = mBundle.get(key);
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if (value != null && value instanceof Bitmap) {
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Bitmap bmp = (Bitmap) value;
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if (bmp.getHeight() > maxBitmapSize || bmp.getWidth() > maxBitmapSize) {
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putBitmap(key, scaleBitmap(bmp, maxBitmapSize));
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}
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}
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}
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}
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/**
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* Put a String value into the meta data. Custom keys may be used, but if
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* the METADATA_KEYs defined in this class are used they may only be one
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* of the following:
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* <ul>
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* <li>{@link #METADATA_KEY_RDS_PS}</li>
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* <li>{@link #METADATA_KEY_RDS_RT}</li>
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* <li>{@link #METADATA_KEY_TITLE}</li>
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* <li>{@link #METADATA_KEY_ARTIST}</li>
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* <li>{@link #METADATA_KEY_ALBUM}</li>
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* <li>{@link #METADATA_KEY_GENRE}</li>
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* </ul>
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*
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* @param key The key for referencing this value
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* @param value The String value to store
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* @return the same Builder instance
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*/
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public Builder putString(String key, String value) {
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if (!METADATA_KEYS_TYPE.containsKey(key) ||
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METADATA_KEYS_TYPE.get(key) != METADATA_TYPE_TEXT) {
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throw new IllegalArgumentException("The " + key
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+ " key cannot be used to put a String");
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}
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mBundle.putString(key, value);
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return this;
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}
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/**
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* Put an int value into the meta data. Custom keys may be used, but if
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* the METADATA_KEYs defined in this class are used they may only be one
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* of the following:
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* <ul>
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* <li>{@link #METADATA_KEY_RDS_PI}</li>
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* <li>{@link #METADATA_KEY_RDS_PTY}</li>
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* <li>{@link #METADATA_KEY_RBDS_PTY}</li>
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* </ul>
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* or any bitmap represented by its identifier.
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*
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* @param key The key for referencing this value
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* @param value The int value to store
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* @return the same Builder instance
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*/
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public Builder putInt(String key, int value) {
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RadioMetadata.putInt(mBundle, key, value);
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return this;
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}
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/**
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* Put a {@link Bitmap} into the meta data. Custom keys may be used, but
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* if the METADATA_KEYs defined in this class are used they may only be
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* one of the following:
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* <ul>
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* <li>{@link #METADATA_KEY_ICON}</li>
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* <li>{@link #METADATA_KEY_ART}</li>
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* </ul>
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* <p>
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*
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* @param key The key for referencing this value
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* @param value The Bitmap to store
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* @return the same Builder instance
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*/
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public Builder putBitmap(String key, Bitmap value) {
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if (!METADATA_KEYS_TYPE.containsKey(key) ||
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METADATA_KEYS_TYPE.get(key) != METADATA_TYPE_BITMAP) {
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throw new IllegalArgumentException("The " + key
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+ " key cannot be used to put a Bitmap");
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}
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mBundle.putParcelable(key, value);
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return this;
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}
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/**
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* Put a {@link RadioMetadata.Clock} into the meta data. Custom keys may be used, but if the
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* METADATA_KEYs defined in this class are used they may only be one of the following:
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* <ul>
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* <li>{@link #MEADATA_KEY_CLOCK}</li>
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* </ul>
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*
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* @param utcSecondsSinceEpoch Number of seconds since epoch for UTC + 0 timezone.
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* @param timezoneOffsetInMinutes Offset of timezone from UTC + 0 in minutes.
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* @return the same Builder instance.
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*/
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public Builder putClock(String key, long utcSecondsSinceEpoch, int timezoneOffsetMinutes) {
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if (!METADATA_KEYS_TYPE.containsKey(key) ||
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METADATA_KEYS_TYPE.get(key) != METADATA_TYPE_CLOCK) {
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throw new IllegalArgumentException("The " + key
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+ " key cannot be used to put a RadioMetadata.Clock.");
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}
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mBundle.putParcelable(key, new Clock(utcSecondsSinceEpoch, timezoneOffsetMinutes));
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return this;
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}
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/**
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* Creates a {@link RadioMetadata} instance with the specified fields.
|
*
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* @return a new {@link RadioMetadata} object
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*/
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public RadioMetadata build() {
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return new RadioMetadata(mBundle);
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}
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private Bitmap scaleBitmap(Bitmap bmp, int maxSize) {
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float maxSizeF = maxSize;
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float widthScale = maxSizeF / bmp.getWidth();
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float heightScale = maxSizeF / bmp.getHeight();
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float scale = Math.min(widthScale, heightScale);
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int height = (int) (bmp.getHeight() * scale);
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int width = (int) (bmp.getWidth() * scale);
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return Bitmap.createScaledBitmap(bmp, width, height, true);
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}
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}
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int putIntFromNative(int nativeKey, int value) {
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String key = getKeyFromNativeKey(nativeKey);
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try {
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putInt(mBundle, key, value);
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return 0;
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} catch (IllegalArgumentException ex) {
|
return -1;
|
}
|
}
|
|
int putStringFromNative(int nativeKey, String value) {
|
String key = getKeyFromNativeKey(nativeKey);
|
if (!METADATA_KEYS_TYPE.containsKey(key) ||
|
METADATA_KEYS_TYPE.get(key) != METADATA_TYPE_TEXT) {
|
return -1;
|
}
|
mBundle.putString(key, value);
|
return 0;
|
}
|
|
int putBitmapFromNative(int nativeKey, byte[] value) {
|
String key = getKeyFromNativeKey(nativeKey);
|
if (!METADATA_KEYS_TYPE.containsKey(key) ||
|
METADATA_KEYS_TYPE.get(key) != METADATA_TYPE_BITMAP) {
|
return -1;
|
}
|
Bitmap bmp = null;
|
try {
|
bmp = BitmapFactory.decodeByteArray(value, 0, value.length);
|
if (bmp != null) {
|
mBundle.putParcelable(key, bmp);
|
return 0;
|
}
|
} catch (Exception e) {
|
}
|
return -1;
|
}
|
|
int putClockFromNative(int nativeKey, long utcEpochSeconds, int timezoneOffsetInMinutes) {
|
String key = getKeyFromNativeKey(nativeKey);
|
if (!METADATA_KEYS_TYPE.containsKey(key) ||
|
METADATA_KEYS_TYPE.get(key) != METADATA_TYPE_CLOCK) {
|
return -1;
|
}
|
mBundle.putParcelable(key, new RadioMetadata.Clock(
|
utcEpochSeconds, timezoneOffsetInMinutes));
|
return 0;
|
}
|
}
|
