我打算用这个应用程序记录通话。但是当我将 audioSource 设置为 MediaRecorder.AudioSource.VOICE_CALL 时,它会给出一个错误,但是当 audioSource 设置为 MediaRecorder.AudioSource.MIC 时,它工作得非常好。我不确定问题出在哪里。问题的logcat如下。非常感谢任何形式的帮助。谢谢。
public class IncomingCallReceiver extends BroadcastReceiver {
private MediaRecorder mRecorder;
@Override
public void onReceive(Context context, Intent intent) {
Bundle bundle = intent.getExtras();
if(null == bundle)
return;
String state = bundle.getString(TelephonyManager.EXTRA_STATE);
if(state.equalsIgnoreCase(TelephonyManager.EXTRA_STATE_RINGING))
{
}
else if (state.equalsIgnoreCase(TelephonyManager.EXTRA_STATE_OFFHOOK)){
Log.i("TelephonyManager", "Call picked up");
mRecorder = new MediaRecorder();
mRecorder.setAudioSource(MediaRecorder.AudioSource.VOICE_CALL);
mRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
mRecorder.setAudioEncodingBitRate(16);
mRecorder.setAudioSamplingRate(44100);
mRecorder.setOutputFile("/sdcard/Recording/callrecord.mp4");
try{
mRecorder.prepare();
}
catch(IOException e){
}
mRecorder.start();
Log.i("StartRecordingCall", "Recording Call end");
}
else if (state.equalsIgnoreCase(TelephonyManager.EXTRA_STATE_IDLE)){
Log.i("TelephonyManager", "Call hunged up");
mRecorder.stop();
mRecorder.release();
mRecorder=null;
}
}
/
12-18 20:15:56.755: E/MediaRecorder(1577): start failed: -2147483648
12-18 20:15:56.755: D/AndroidRuntime(1577): Shutting down VM
12-18 20:15:56.755: W/dalvikvm(1577): threadid=1: thread exiting with uncaught exception (group=0x2b542210)
12-18 20:15:56.765: E/AndroidRuntime(1577): FATAL EXCEPTION: main
12-18 20:15:56.765: E/AndroidRuntime(1577): java.lang.RuntimeException: start failed.
12-18 20:15:56.765: E/AndroidRuntime(1577): at android.media.MediaRecorder.start(Native Method)
12-18 20:15:56.765: E/AndroidRuntime(1577): at com.example.callrecorder.MainActivity.startRecording(MainActivity.java:447)
12-18 20:15:56.765: E/AndroidRuntime(1577): at com.example.callrecorder.MainActivity.onClick(MainActivity.java:279)
12-18 20:15:56.765: E/AndroidRuntime(1577): at android.view.View.performClick(View.java:3534)
12-18 20:15:56.765: E/AndroidRuntime(1577): at android.view.View$PerformClick.run(View.java:14263)
12-18 20:15:56.765: E/AndroidRuntime(1577): at android.os.Handler.handleCallback(Handler.java:605)
12-18 20:15:56.765: E/AndroidRuntime(1577): at android.os.Handler.dispatchMessage(Handler.java:92)
12-18 20:15:56.765: E/AndroidRuntime(1577): at android.os.Looper.loop(Looper.java:137)
12-18 20:15:56.765: E/AndroidRuntime(1577): at android.app.ActivityThread.main(ActivityThread.java:4441)
12-18 20:15:56.765: E/AndroidRuntime(1577): at java.lang.reflect.Method.invokeNative(Native Method)
12-18 20:15:56.765: E/AndroidRuntime(1577): at java.lang.reflect.Method.invoke(Method.java:511)
12-18 20:15:56.765: E/AndroidRuntime(1577): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
12-18 20:15:56.765: E/AndroidRuntime(1577): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
12-18 20:15:56.765: E/AndroidRuntime(1577): at dalvik.system.NativeStart.main(Native Method)