无法检测时，呼出的Andr​​oid正在回答 [英] Cannot detect when outgoing call is answered in Android

问题描述

要检测时，拨出电话接通后，我试图创建一个 PhoneStateListener 和监听 TelephonyManager 的 CALL_STATE_RINGING ， CALL_STATE_OFFHOOK 和 CALL_STATE_IDLE ，从的this质疑，但它似乎并没有工作，如下所述。

To detect when an outgoing call is answered, I tried creating a PhoneStateListener and listening for TelephonyManager's CALL_STATE_RINGING, CALL_STATE_OFFHOOK, and CALL_STATE_IDLE, from this question, but it does not seem to work, as explained below.

首先，我注册清单中的以下权限：

First, I registered the following permission in the manifest:

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

然后，的BroadcastReceiver 名为 OutCallLogger 映入 NEW_OUTGOING_CALL 每当呼出由事件：

Then, a BroadcastReceiver called OutCallLogger that catches the NEW_OUTGOING_CALL event whenever an outgoing call is made:

<receiver android:name=".listener.OutCallLogger">
    <intent-filter>
        <action android:name="android.intent.action.NEW_OUTGOING_CALL" />
    </intent-filter>
</receiver>

接下来，我执行 OutCallLogger 的。我成立了一个名为布尔 noCallListenerYet 来避免附加一个新的 PhoneStateListener 到 TelephonyManager 每当的onReceive（）被调用。

Next, my implementation of OutCallLogger. I set up a boolean called noCallListenerYet to avoid attaching a new PhoneStateListener to the TelephonyManager whenever onReceive() is invoked.

public class OutCallLogger extends BroadcastReceiver {

    private static boolean noCallListenerYet = true;

    @Override
    public void onReceive(final Context context, Intent intent) {
        number = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
        if (noCallListenerYet) {
            final TelephonyManager tm = (TelephonyManager) context.getSystemService(
                    Context.TELEPHONY_SERVICE);
            tm.listen(new PhoneStateListener() {
                @Override
                public void onCallStateChanged(int state, String incomingNumber) {
                    switch (state) {
                        case TelephonyManager.CALL_STATE_RINGING:
                            Log.d(This.LOG_TAG, "RINGING");
                            break;
                        case TelephonyManager.CALL_STATE_OFFHOOK:
                            Log.d(This.LOG_TAG, "OFFHOOK");
                            break;
                        case TelephonyManager.CALL_STATE_IDLE:
                            Log.d(This.LOG_TAG, "IDLE");
                            break;
                        default:
                            Log.d(This.LOG_TAG, "Default: " + state);
                            break;
                    }
                }
            }, PhoneStateListener.LISTEN_CALL_STATE);
            noCallListenerYet = false;
        }
    }

}

现在，当我拨出电话在我的设备， CALL_STATE_RINGING 永远不会被调用。我总是只能得到IDLE打印输出摘机时，其他线路开始振铃，没事的时候呼叫被应答，并打印输出空闲通话结束时再次。

Now, when I make an outgoing call in my device, CALL_STATE_RINGING is NEVER invoked. I always only get printouts of "IDLE" to "OFFHOOK" when the other line starts ringing, nothing when the call is answered, and a printout of "IDLE" again when the call is ended.

我怎么能可靠地检测时呼出的回答是Android的，或者是说甚至有可能？

How can I reliably detect when an outgoing call is answered in Android, or is that even possible?

推荐答案

由于Android 5.0，这是可能的系统应用程序。但是，你需要使用隐藏的Andr​​oid API。

Since Android 5.0 this is possible for system apps. But you need to use the hidden Android API.

我得到它的工作是这样的：

I got it to work like this:

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

<receiver android:name=".listener.OutCallLogger">
    <intent-filter>
        <action android:name="android.intent.action.PRECISE_CALL_STATE" />
    </intent-filter>
</receiver>

public class OutCallLogger extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        switch (intent.getIntExtra(TelephonyManager.EXTRA_FOREGROUND_CALL_STATE, -2) {
            case PreciseCallState.PRECISE_CALL_STATE_IDLE:
                Log.d(This.LOG_TAG, "IDLE");
                break;
            case PreciseCallState.PRECISE_CALL_STATE_DIALING:
                Log.d(This.LOG_TAG, "DIALING");
                break;
            case PreciseCallState.PRECISE_CALL_STATE_ALERTING:
                Log.d(This.LOG_TAG, "ALERTING");
                break;
            case PreciseCallState.PRECISE_CALL_STATE_ACTIVE:
                Log.d(This.LOG_TAG, "ACTIVE");
                break;
        }
    }
}

您可以在<一个所有可能的通话状态href="https://android.googlesource.com/platform/frameworks/base.git/+/master/telephony/java/android/telephony/$p$pciseCallState.java#26"相对=nofollow> preciseCallState.java 和意图包含所有演员<一href="https://android.googlesource.com/platform/frameworks/base/+/4f868ed/services/core/java/com/android/server/TelephonyRegistry.java#1242"相对=nofollow> TelephonyRegistry.java 。

You can find all possible call states in PreciseCallState.java and all extras that the intent contains in TelephonyRegistry.java.

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