/*
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* Copyright © Yan Zhenjie. All Rights Reserved
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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 com.rockchip.alexa.jacky.fragment;
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import android.os.Bundle;
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import android.support.annotation.IdRes;
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import android.support.v4.app.FragmentManager;
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import android.support.v4.app.FragmentTransaction;
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import android.support.v7.app.AppCompatActivity;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.concurrent.atomic.AtomicInteger;
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/**
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* Created by Yan Zhenjie on 2017/1/13.
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*/
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public abstract class CompatActivity extends AppCompatActivity {
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public static final int REQUEST_CODE_INVALID = -1;
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private AtomicInteger mAtomicInteger = new AtomicInteger();
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private List<NoFragment> mFragmentStack = new ArrayList<>();
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private Map<NoFragment, FragmentStackEntity> mFragmentEntityMap = new HashMap<>();
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static class FragmentStackEntity {
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private FragmentStackEntity() {
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}
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private boolean isSticky = false;
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private int requestCode = REQUEST_CODE_INVALID;
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@ResultCode
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int resultCode = RESULT_CANCELED;
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Bundle result = null;
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}
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/**
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* Show a fragment.
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*
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* @param clazz fragment class.
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*/
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public final <T extends NoFragment> void startFragment(Class<T> clazz) {
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try {
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NoFragment targetFragment = clazz.newInstance();
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startFragment(null, targetFragment, true, REQUEST_CODE_INVALID);
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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public <T extends NoFragment> void startFragmentClearStack(Class<T> cla) {
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if (mFragmentStack != null) {
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mFragmentStack.clear();
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}
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startFragment(cla);
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}
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/**
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* Show a fragment.
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*
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* @param clazz fragment class.
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* @param stickyStack sticky to back stack.
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*/
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public final <T extends NoFragment> void startFragment(Class<T> clazz, boolean stickyStack) {
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try {
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NoFragment targetFragment = clazz.newInstance();
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startFragment(null, targetFragment, stickyStack, REQUEST_CODE_INVALID);
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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/**
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* Show a fragment.
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*
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* @param targetFragment fragment to display.
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* @param <T> {@link NoFragment}.
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*/
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public final <T extends NoFragment> void startFragment(T targetFragment) {
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startFragment(null, targetFragment, true, REQUEST_CODE_INVALID);
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}
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/**
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* Show a fragment.
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*
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* @param targetFragment fragment to display.
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* @param stickyStack sticky back stack.
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* @param <T> {@link NoFragment}.
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*/
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public final <T extends NoFragment> void startFragment(T targetFragment, boolean stickyStack) {
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startFragment(null, targetFragment, stickyStack, REQUEST_CODE_INVALID);
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}
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/**
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* Show a fragment.
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*
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* @param clazz fragment to display.
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* @param requestCode requestCode.
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* @param <T> {@link NoFragment}.
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*/
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public <T extends NoFragment> void startFragmentForResquest(Class<T> clazz, int requestCode) {
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if (requestCode == REQUEST_CODE_INVALID)
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throw new IllegalArgumentException("The requestCode must be positive integer.");
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try {
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NoFragment targetFragment = clazz.newInstance();
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startFragment(null, targetFragment, true, requestCode);
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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/**
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* Show a fragment.
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*
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* @param targetFragment fragment to display.
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* @param requestCode requestCode.
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* @param <T> {@link NoFragment}.
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*/
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public <T extends NoFragment> void startFragmentForResquest(T targetFragment, int requestCode) {
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if (requestCode == REQUEST_CODE_INVALID)
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throw new IllegalArgumentException("The requestCode must be positive integer.");
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startFragment(null, targetFragment, true, requestCode);
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}
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/**
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* Show a fragment.
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*
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* @param nowFragment Now show fragment, can be null.
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* @param targetFragment fragment to display.
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* @param stickyStack sticky back stack.
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* @param requestCode requestCode.
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* @param <T> {@link NoFragment}.
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*/
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public <T extends NoFragment> void startFragment(T nowFragment, T targetFragment, boolean stickyStack, int
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requestCode) {
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FragmentStackEntity fragmentStackEntity = new FragmentStackEntity();
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fragmentStackEntity.isSticky = stickyStack;
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fragmentStackEntity.requestCode = requestCode;
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targetFragment.setStackEntity(fragmentStackEntity);
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FragmentManager fragmentManager = getSupportFragmentManager();
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FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
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if (nowFragment != null) {
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if (mFragmentEntityMap.get(nowFragment).isSticky) {
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nowFragment.onPause();
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nowFragment.onStop();
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fragmentTransaction.hide(nowFragment);
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} else {
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fragmentTransaction.remove(nowFragment);
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fragmentTransaction.commit();
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mFragmentStack.remove(nowFragment);
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mFragmentEntityMap.remove(nowFragment);
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fragmentTransaction = fragmentManager.beginTransaction();
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}
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}
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String fragmentTag = targetFragment.getClass().getSimpleName() + mAtomicInteger.incrementAndGet();
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fragmentTransaction.add(fragmentLayoutId(), targetFragment, fragmentTag);
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fragmentTransaction.addToBackStack(fragmentTag);
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fragmentTransaction.commitAllowingStateLoss();
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mFragmentStack.add(targetFragment);
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mFragmentEntityMap.put(targetFragment, fragmentStackEntity);
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}
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/**
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* When the back off.
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*/
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private boolean onBackStackFragment() {
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FragmentManager fragmentManager = getSupportFragmentManager();
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if (mFragmentStack.size() > 1) {
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fragmentManager.popBackStack();
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NoFragment inFragment = mFragmentStack.get(mFragmentStack.size() - 2);
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FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
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fragmentTransaction.show(inFragment);
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fragmentTransaction.commit();
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NoFragment outFragment = mFragmentStack.get(mFragmentStack.size() - 1);
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inFragment.onResume();
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FragmentStackEntity fragmentStackEntity = mFragmentEntityMap.get(outFragment);
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mFragmentStack.remove(outFragment);
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mFragmentEntityMap.remove(outFragment);
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if (fragmentStackEntity.requestCode != REQUEST_CODE_INVALID) {
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inFragment.onFragmentResult(fragmentStackEntity.requestCode, fragmentStackEntity.resultCode,
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fragmentStackEntity.result);
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}
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return true;
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}
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return false;
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}
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@Override
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public void onBackPressed() {
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if (!onBackStackFragment()) {
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finish();
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}
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}
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/**
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* Should be returned to display fragments id of {@link android.view.ViewGroup}.
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*
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* @return resource id of {@link android.view.ViewGroup}.
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*/
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protected abstract
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@IdRes
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int fragmentLayoutId();
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}
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