Android5.0InterceptHomeKey

public class KeypadIntercept {private static final String TAG &＃61; "KeypadIntercept";private Context mContext;private IntentFilter mFilter;private OnKeypadListener mListener;private HomeKeyRecevier mRecevier;// 广播携带String类型参数final String SYSTEM_DIALOG_REASON_KEY &＃61; "reason";// 切换应用程序键final String SYSTEM_DIALOG_REASON_RECENT_APPS &＃61; "recentapps";// Home键final String SYSTEM_DIALOG_REASON_HOME_KEY &＃61; "homekey";// 申明按键事件监听接口public interface OnKeypadListener {void onHomeKeypadPressed();void onRecentKeypadPressed();void onKeypadError();}public KeypadIntercept(Context context) {mContext &＃61; context;mRecevier &＃61; new HomeKeyRecevier();// 实例化的时候给Intent添加广播mFilter &＃61; new IntentFilter(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);}public void setOnKeypadListener(OnKeypadListener listener) {mListener &＃61; listener;}public void startListener() {if (mRecevier !&＃61; null) {// 动态注册广播mContext.registerReceiver(mRecevier, mFilter);}}public void stopListener() {if (mRecevier !&＃61; null) {// 注销广播mContext.unregisterReceiver(mRecevier);}}class HomeKeyRecevier extends BroadcastReceiver {&＃64;Overridepublic void onReceive(Context context, Intent intent) {String action &＃61; intent.getAction();if (action.equals(Intent.ACTION_CLOSE_SYSTEM_DIALOGS)) {String reasonKey &＃61; intent.getStringExtra(SYSTEM_DIALOG_REASON_KEY);if (reasonKey !&＃61; null) {if (mListener !&＃61; null) {Log.i(TAG, "Action&＃61; " &＃43; action &＃43; ", reason&＃61; " &＃43; reasonKey);switch (reasonKey) {case SYSTEM_DIALOG_REASON_HOME_KEY:mListener.onHomeKeypadPressed();break;case SYSTEM_DIALOG_REASON_RECENT_APPS:mListener.onRecentKeypadPressed();break;default:mListener.onKeypadError();break;}}}}}}
}

public class MainActivity extends AppCompatActivity {KeypadIntercept mKeypadIntercept;&＃64;Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);mKeypadIntercept &＃61; new KeypadIntercept(MainActivity.this);mKeypadIntercept.startListener();mKeypadIntercept.setOnKeypadListener(new KeypadIntercept.OnKeypadListener() {&＃64;Overridepublic void onHomeKeypadPressed() {Toast.makeText(MainActivity.this, "onHomeKeypadPressed", Toast.LENGTH_LONG).show();}&＃64;Overridepublic void onRecentKeypadPressed() {Toast.makeText(MainActivity.this, "onRecentKeypadPressed", Toast.LENGTH_LONG).show();}&＃64;Overridepublic void onKeypadError() {Toast.makeText(MainActivity.this, "onKeypadError", Toast.LENGTH_LONG).show();}});}&＃64;Overrideprotected void onDestroy() {super.onDestroy();mKeypadIntercept.stopListener();}
}