Android 进阶Android Home 键监听 _Android

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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(); } } } }

【Android 进阶Android Home 键监听】