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(安卓)进阶】Android(安卓)Home 键监听

Android Home键监听

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