Android 媒体录制：java.lang.RuntimeException：启动失败

我正在处理电话录音。当我开始录制电话时，不幸的是它停止了。它给出了错误MediaRecorder启动失败-2147483648。我参考这个答案link。但我不明白。请告诉我我的代码有什么问题？这是我的代码。

public class IncomingCall extends BroadcastReceiver {

Context pcontext;
private static MediaRecorder recorder;
private boolean recordedStart = false;

@SuppressWarnings("unchecked")
public void onReceive(Context context, Intent intent) {
    pcontext = context;
    recorder = new MediaRecorder();

try {
            TelephonyManager tmgr = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
            MyPhoneStateListener PhoneListener = new MyPhoneStateListener();
            tmgr.listen(PhoneListener, PhoneStateListener.LISTEN_CALL_STATE);

    } catch (Exception e) {
        Log.e("Phone Receive Error", " " + e);
    }

}

private class MyPhoneStateListener extends PhoneStateListener {
    public void onCallStateChanged(int state, String incomingNumber) {



        switch (state) {
        case TelephonyManager.CALL_STATE_RINGING:
            Log.e("MyPhoneListener",state+"   incoming no:"+incomingNumber);
            Log.e("CALL_STATE_RINGING", "CALL_STATE_RINGING");

            break;

        case TelephonyManager.CALL_STATE_OFFHOOK:

            recorder.setAudioSource(MediaRecorder.AudioSource.VOICE_CALL);
            recorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
            recorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
            recorder.setOutputFile(Environment.getExternalStorageDirectory()+"/MyRecorder.mp3");
            Log.e("Path", ""+Environment.getExternalStorageDirectory()+"/MyRecorder.mp3");
            try {
                recorder.prepare();
                recorder.start();
                recordedStart = true;
                Log.e("Start", "Recorder Start");
            } catch (IllegalStateException | IOException e) {
                // TODO Auto-generated catch block
                Log.e("Error", ""+e);
            }

            break;
        case TelephonyManager.CALL_STATE_IDLE:
            Log.e("CALL_STATE_IDLE", "CALL_STATE_IDLE");
            if (recordedStart == true) {
                recorder.stop();
                recorder.release();
                recordedStart = false;
                Log.e("Stop", "Recorder Stop");
            }
            break;
        }
    }
}

}

Logcat错误

05-05 10:57:23.771: E/MediaRecorder(12812): start failed: -2147483648
05-05 10:57:23.771: D/AndroidRuntime(12812): Shutting down VM
05-05 10:57:23.771: W/dalvikvm(12812): threadid=1: thread exiting with uncaught exception (group=0x416bdd40)
05-05 10:57:23.774: E/AndroidRuntime(12812): FATAL EXCEPTION: main
05-05 10:57:23.774: E/AndroidRuntime(12812): Process: web.revolution.autocallanswer, PID: 12812
05-05 10:57:23.774: E/AndroidRuntime(12812): java.lang.RuntimeException: start failed.
05-05 10:57:23.774: E/AndroidRuntime(12812):    at android.media.MediaRecorder.start(Native Method)
05-05 10:57:23.774: E/AndroidRuntime(12812):    at web.revolution.autocallanswer.IncomingCall$MyPhoneStateListener.onCallStateChanged(IncomingCall.java:98)
05-05 10:57:23.774: E/AndroidRuntime(12812):    at android.telephony.PhoneStateListener$2.handleMessage(PhoneStateListener.java:389)
05-05 10:57:23.774: E/AndroidRuntime(12812):    at android.os.Handler.dispatchMessage(Handler.java:102)
05-05 10:57:23.774: E/AndroidRuntime(12812):    at android.os.Looper.loop(Looper.java:136)
05-05 10:57:23.774: E/AndroidRuntime(12812):    at android.app.ActivityThread.main(ActivityThread.java:5102)
05-05 10:57:23.774: E/AndroidRuntime(12812):    at java.lang.reflect.Method.invokeNative(Native Method)
05-05 10:57:23.774: E/AndroidRuntime(12812):    at java.lang.reflect.Method.invoke(Method.java:515)
05-05 10:57:23.774: E/AndroidRuntime(12812):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
05-05 10:57:23.774: E/AndroidRuntime(12812):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
05-05 10:57:23.774: E/AndroidRuntime(12812):    at dalvik.system.NativeStart.main(Native Method)
05-05 10:57:25.586: I/Process(12812): Sending signal. PID: 12812 SIG: 9
05-05 10:57:27.052: E/CALL_STATE_IDLE(13255): CALL_STATE_IDLE

此问题由该音频源引起

   recorder.setAudioSource(MediaRecorder.AudioSource.VOICE_CALL);

无法在您的设备和 Android 上运行！ 将其更改为

   recorder.setAudioSource(MediaRecorder.AudioSource.MIC);

或其他来源。

您也可以通过更改 recorderstart() 来尝试/捕获 IllegalStateException,Exception 与此相同来删除 FC

        try {
        recorder.prepare();

    } catch (IllegalStateException e) {
        // TODO Auto-generated catch block
        Log.d("ERROR ","IllegalStateException");
    } catch (Exception e) {
        // TODO Auto-generated catch block
        Log.d("ERROR ","IOException");
        e.printStackTrace();
    } 
    try {
    recorder.start();
    } catch (Exception e) {

    }

我自己也遇到了这个问题，这对于通话录音非常有效，但是如果您也找到了此电话的解决方案，则接收器语音质量问题非常低。