没能拿到TelephonyManager.CALL_STATE_RINGING [英] Not able to get the TelephonyManager.CALL_STATE_RINGING

问题描述

我说这是我的manifest文件 -

I added this is my manifest file -

        <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>

然后，我的服务类是这样的 -

Then my service class is like this -

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);
}

}

和我PhoneStateListener是 -

and my PhoneStateListener is -

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);
}

}

我能看到空闲状态。

不过，当我打电话我不明白振铃状态。为什么呢？

But When I call i dont get the Ringing state. Why?

推荐答案

我想你混淆了两种方法来获取手机状态。如果您使用的意图过滤器和广播接收器，然后在接收端不需要调用TelephonyManager的听（）。只是检查所接收到的意图是这样的：

I think you are mixing up two approaches to get phone state. If you use the intent-filter and broadcast receiver, then in the receiver no need to call the TelephonyManager's listen(). Just check the received intent like this :

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");
    }
}

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