android – 无法获取TelephonyManager.CALL_STATE_RINGING

我补充说,这是我的清单文件 –

<receiver android:name=".ServiceReceiver">
        <intent-filter>
            <action android:name="android.intent.action.PHONE_STATE" />
        </intent-filter>
    </receiver>
</application>

<uses-permission android:name="android.permission.READ_PHONE_STATE">
</uses-permission>

那么我的服务类就是这样 –

public class ServiceReceiver extends broadcastReceiver {

@Override
public void onReceive(Context context,Intent intent) {
    MyPhonestateListener phoneListener = new MyPhonestateListener();
    TelephonyManager telephony = (TelephonyManager) context
            .getSystemService(Context.TELEPHONY_SERVICE);
    telephony.listen(phoneListener,PhonestateListener.LISTEN_CALL_STATE);
}

}

我的PhonestateListener是 –

public class MyPhonestateListener extends PhonestateListener {

public void onCallStateChanged(int state,String incomingNumber) {
    Log.i("telephony-example","State changed: " + stateName(state));
}

String stateName(int state) {
    switch (state) {
    case TelephonyManager.CALL_STATE_IDLE:
        Log.d("DEBUG","***********IDLE********");
        return "Idle";
    case TelephonyManager.CALL_STATE_OFFHOOK:
        Log.d("DEBUG","***********OFFHOOK********");
        return "Off hook";
    case TelephonyManager.CALL_STATE_RINGING:
        Log.d("DEBUG","***********RINGING********");
        return "Ringing";
    }
    return Integer.toString(state);
}

}

我可以看到IDLE状态.

但是当我打电话给我没有铃声状态.为什么？

解决方法

我想你正在混合两种方法来获取电话状态.如果您使用意向过滤器和广播接收器,则在接收器中不需要调用TelephonyManager的listen().只需检查收到的意图如下：

public void onReceive(Context context,Intent intent) {
    String state = intent.getStringExtra(TelephonyManager.EXTRA_STATE);
    String number = intent.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER);
    if (TelephonyManager.EXTRA_STATE_RINGING.equals(state))
    {
        Log.d("MPR","Its Ringing [" + number + "]");
    }
    if (TelephonyManager.EXTRA_STATE_IDLE.equals(state))
    {
        Log.d("MPR","Its Idle");
    }
    if (TelephonyManager.EXTRA_STATE_OFFHOOK.equals(state))
    {
        Log.d("MPR","Its OffHook");
    }
}