【Android 进阶】Android Home 键监听
16lz
2021-01-23
Android Home键监听
Android 普通键值可以直接在dispatchKeyEvent（）中处理，但Home键，比较特殊，需要单独监听其广播，且必须为动态广播，其静态广播无效；
需求：Home键，设置 Kill 自己，但设置中有多个Activity，在每个Activiy 中年监听Home键广播不现实，必须把监听广播抽取出来在同一个类中实现，考虑到BaseActivity；
public class BaseActivity extends Activity { private HomeWatcherReceiver mHomeWatcherReceiver = null; private boolean isNeedFinish = false; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); registerReceiver(); } public void setBackFinish(boolean flag) { isNeedFinish = flag; } private void registerReceiver() { mHomeWatcherReceiver = new HomeWatcherReceiver(); IntentFilter filter = new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS); registerReceiver(mHomeWatcherReceiver, filter); } @Override public boolean dispatchKeyEvent(KeyEvent event) { int KeyCode = event.getKeyCode(); if (event.getAction() == KeyEvent.ACTION_DOWN) { if (event.getKeyCode() == KeyEvent.KEYCODE_BACK) { this.finish(); System.gc(); return true; } } return super.dispatchKeyEvent(event); } public class HomeWatcherReceiver extends BroadcastReceiver { private static final String SYSTEM_DIALOG_REASON_KEY = "reason"; private static final String SYSTEM_DIALOG_REASON_HOME_KEY = "homekey"; @Override public void onReceive(Context context, Intent intent) { String intentAction = intent.getAction(); Log.i(MyAPP, "intentAction =" + intentAction); if (TextUtils.equals(intentAction, Intent.ACTION_CLOSE_SYSTEM_DIALOGS)) { String reason = intent.getStringExtra(SYSTEM_DIALOG_REASON_KEY); Log.i(MyAPP, "reason =" + reason); if (TextUtils.equals(SYSTEM_DIALOG_REASON_HOME_KEY, reason)) { BaseActivity.this.finish(); } } } } @Override protected void onDestroy() { super.onDestroy(); if (mHomeWatcherReceiver != null) { try { unregisterReceiver(mHomeWatcherReceiver); } catch (Exception e) { e.printStackTrace(); } } }}更多相关文章
- Android实现录屏直播（二）需求才是硬道理之产品功能调研
- [置顶] 关于Android NDK中如何调用第三方静态库--live555
- 关于Android NDK中如何调用第三方静态库--live555
- Android静态，动态广播示例
- Android中的人脸检测(静态和动态)
- Android中的人脸检测（静态和动态）
- 【Android NDK 开发】Ubuntu 函数库交叉编译 ( Android 动态库交
- Android静态代码分析
- asp.net core实例教程之异常处理与静态文件教程