读取手机状态时出现问题

Question

当来电时，我想在我的应用程序中执行一些操作（暂停游戏）。但读取手机状态不起作用。我已在清单中授予权限（READ_PHONE_STATE）。来电时什么也没有发生。 谢谢。

TelephonyManager telephonyManager;
PhoneStateListener listener;
telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
*
*
*
listener = new PhoneStateListener() {
        @Override
        public void onCallStateChanged(int state, String incomingNumber) {

        switch (state) {
        case TelephonyManager.CALL_STATE_IDLE:
            Toast.makeText(SudokuGameActivity.this, "IDLE", Toast.LENGTH_SHORT).show();
          break;
        case TelephonyManager.CALL_STATE_OFFHOOK:
         Toast.makeText(SudokuGameActivity.this, "OFF Hook", Toast.LENGTH_SHORT).show();
          break;
        case TelephonyManager.CALL_STATE_RINGING:
            Toast.makeText(SudokuGameActivity.this, "Ringing", Toast.LENGTH_SHORT).show();
            mpauseButton.performClick();
          break;
          }

        }
       };

Answer 1

您是否写过以下行：

 telephonyManager.listen(listener,PhoneStateListener.LISTEN_CALL_STATE);

Answer 2

创建监听器后，您需要调用“public void Listen(PhoneStateListenerlistener, int events)”来监听。

另外，你可以尝试这个：
创建一个broadcatst接收器处理动作android.intent.action.PHONE_STATE，

代码示例：

public class PhoneStateReceiver extends BroadcastReceiver {

private TelephonyManager manager;

@Override
public void onReceive(Context context, Intent intent) {
    if (manager == null) {
        manager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
    }
    String action = intent.getAction();
    System.out.println(action);
    System.out.println("current phone state:" + manager.getCallState());
}

}