Question

在调试下面的代码时，BroadcastReceiverCustom正在进行中调用，但PhoneStateListenerCustom不是。

现在我只在BroadcastReceiverCustom中执行必要的操作，但也许不是最好的去处。有什么建议为什么没有调用PhoneStateListener？已经花了很多时间可能的原因，不知道？具有正确权限的清单文件都是正确的。我没有看到运行时异常。

BroadcastReceiverCustom.java

public class BroadcastReceiverCustom extends BroadcastReceiver {

private static final String TAG = "BroadcastReceiverCustom";

    @Override
    public void onReceive(Context context, Intent intent) {

        Log.v(TAG, "WE ARE INSIDE!!!!!!!!!!!");

        TelephonyManager telephony = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
        PhoneStateListenerCustom phoneStateListenerCustom = new PhoneStateListenerCustom();
        telephony.listen(phoneStateListenerCustom, PhoneStateListener.LISTEN_CALL_STATE);
    }
}

PhoneStateListenerCustom.java

public class PhoneStateListenerCustom extends PhoneStateListener {

    private static final String TAG = "PhoneStateListenerCustom";

    public void onCallStateChange(int state, String incomingNumber){

        Log.v(TAG, "WE ARE INSIDE!!!!!!!!!!!");
        switch(state){
            case TelephonyManager.CALL_STATE_RINGING:
                 Log.d(TAG, "RINGING");
                 break;
        }

        super.onCallStateChanged(state, incomingNumber);

    }
}

清单文件

<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<receiver android:name=".BroadcastReceiverCustom">
    <intent-filter>
        <action android:name="android.intent.action.PHONE_STATE" />
    </intent-filter>
</receiver>

Answer 1

您不应在BroadcastReceiver中实例化TelephonyManager和PhoneStateListener。这是一些示例代码：

在活动中：

EndCallListener callListener = new EndCallListener;
TelephonyManager mTM = (TelephonyManager)this.getSystemService(Context.TELEPHONY_SERVICE);
mTM.listen(callListener, PhoneStateListener.LISTEN_CALL_STATE);

private class EndCallListener extends PhoneStateListener {
    @Override
    public void onCallStateChanged(int state, String incomingNumber) {
        if(TelephonyManager.CALL_STATE_RINGING == state) {
            Log.i(LOG_TAG + "Listener", "RINGING, number: " + incomingNumber);
        }
        if(TelephonyManager.CALL_STATE_OFFHOOK == state) {
            Log.i(LOG_TAG + "Listener", "OFFHOOK, number: " + incomingNumber);
        }
        if(TelephonyManager.CALL_STATE_IDLE == state) {
            Log.i(LOG_TAG + "Listener", "IDLE, number: " + incomingNumber);
        }
    }
}

Answer 2

尝试在@Override方法之前添加onCallStateChange

Answer 3

我只想补充一下this答案中提到的Vairavan，在引用PhoneStateListener的方式方面发生了内部变化。现在，它保存在一个弱引用中，这意味着一旦该方法返回，PhoneStateListener实例就可以进行垃圾回收。因此，您应该将引用保存在一个类中，该类将在您希望侦听回调的生命周期中持续存在，例如Service，Application或{{1}}类。

请参阅：https://github.com/aosp-mirror/platform_frameworks_base/commit/f5d7c587e86c64e657a15a12ad70e75d47c48d99#diff-5af2ac899de823cf60597e554bf67fe0。

调用BroadcastReceiver但未调用PhoneStateListener

3 个答案: