Question

我正在创建应用程序，其中包含假设要收听来电的服务，在呼叫结束后弹出一个警告对话框，问题是，只要活动正在运行或在后台，服务正常工作并弹出对话框，但当我关闭活动时，对话框不会弹出，如喜欢听众不再听电话。需要帮助！

这就是我从我的活动中调用服务的方式：

public void onClick(View v) {
    switch (v.getId()) {
    case R.id.start:
        startService(new Intent(getBaseContext(), PhoneService.class));
        break;

    case R.id.stop:
        stopService(new Intent(getBaseContext(), PhoneService.class));
        break;
    }
}

服务类：

public class PhoneService extends Service {



private static String TAG = "SERVICE";
int currentState;
Context context;
String incomingNumber;

@Override
public IBinder onBind(Intent arg0) {
    // TODO Auto-generated method stub
    return null;
}

// starts the service
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    Log.i(TAG, "FirstService started");



    context = this;

    TelephonyManager telephony = (TelephonyManager) this.getSystemService(Context.TELEPHONY_SERVICE); // TelephonyManager
                                                            // object
    CallListener listener = new CallListener();
    telephony.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);
    // keeps the service going until explicitly stops
    return START_STICKY;
}



@Override
public void onDestroy() {
    // TODO Auto-generated method stub
    super.onDestroy();
    Log.i(TAG, "FirstService destroyed");
}

听众类：

public class CallListener extends PhoneStateListener {
    @Override
    public void onCallStateChanged(int state, String incomingNumber) {



        if (TelephonyManager.CALL_STATE_RINGING == state) {
            // Incoming call handling
            Log.i(TAG, " ring ring ring" + incomingNumber);
            currentState = state;

        }
        if (TelephonyManager.CALL_STATE_OFFHOOK == state) {
            // Outgoing call handling and answer
            Log.i(TAG, " ofhook" + incomingNumber);
            currentState = state;

        }
        if (TelephonyManager.CALL_STATE_IDLE == state) {
            // Device back to normal state (not in a call)
            Log.i(TAG, " idle" + incomingNumber);

            if (currentState == TelephonyManager.CALL_STATE_OFFHOOK) {
                Toast.makeText(context,"phone number dialed is "+ PhoneService.this.incomingNumber,Toast.LENGTH_SHORT).show();

                AlertDialog.Builder builder = new AlertDialog.Builder(context);
                builder.setMessage("Who is this person?").setCancelable(false).setPositiveButton("1",new DialogInterface.OnClickListener() {
                public void onClick(
                        DialogInterface dialog, int id) {

                                    }
                                })
                        .setNegativeButton("0",
                                new DialogInterface.OnClickListener() {
                                    public void onClick(
                                            DialogInterface dialog, int id) {

                                    }
                                });
                AlertDialog alert = builder.create();
                alert.getWindow().setType(
                             WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
                alert.show();

            }

            currentState = state;
        }
    }
}

Answer 1

将您的服务更改为从IntentService派生，并删除onBind和onStartCommand的覆盖（让系统处理这些覆盖）。

将您的代码放入onHandleIntent覆盖。

不同的服务类型的处理方式不同 - 绑定服务仅在活动运行时运行，但可以随时启动意向服务。您可以阅读有关服务类型here的更多信息。

来自服务的android调用侦听器在活动关闭时不会响应

1 个答案: