我正在尝试使用AudioRecorder进行录制，然后我尝试使用Media Player播放相同内容，但是它给予mediaplayer.prepare（）无法准备。任何人都可以告诉我什么是合适的理由。 以下是我正在使用的代码
public void onClick(View v) {
recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
if(case_value==0)
recorder.setOutputFile(deviceMIC_path);
else if(case_value==1)
recorder.setOutputFile(deviceMIC_Handset_path);
else if(case_value==2)
recorder.setOutputFile(headsetMIC_path);
recorder.setOnErrorListener(errorListener);
recorder.setOnInfoListener(infoListener);
try {
recorder.prepare();
recorder.start();
if (ENABLE_LOGS)
Log.e(LOG_TAG, resources
.getString(R.string.record_started));
Toast.makeText(context,
resources.getString(R.string.record_started),
Toast.LENGTH_LONG).show();
recording = true;
} catch (IllegalStateException e) {
Log.e("","ILLEAGAL EXCEPTION...");e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
Log.e("","IO EXCEPTION...");
}
catch(Exception e){
e.printStackTrace();
Log.e("","UNKNOWN EXCEPTION...");
}
}
});
stopButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (recording) {
if (ENABLE_LOGS)
Log.e(LOG_TAG, "Record is going to be stoped...");
recorder.stop();
if (ENABLE_LOGS)
Log.e(LOG_TAG, "Record STOPPED....");
Toast
.makeText(context, "Record STOPPED",
Toast.LENGTH_LONG).show();
recorder.release();
recorder=null;
}
}
});
playButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
MediaPlayer mediaplayer = new MediaPlayer();
try {
if(case_value==0)
mediaplayer.setDataSource(deviceMIC_path);
else if(case_value==1)
mediaplayer.setDataSource(deviceMIC_Handset_path);
else if(case_value==2)
mediaplayer.setDataSource(headsetMIC_path);
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
mediaplayer.prepare();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
catch(Exception e){
e.printStackTrace();
}
// mAudioManager.setSpeakerphoneOn(false);
if (ENABLE_LOGS)
Log.e(LOG_TAG, "CASE VALUE : " + case_value);
if (case_value == 0) {
if (MainActivity.headsetState == 0) {
if (!mediaplayer.isPlaying()) {
mediaplayer.start();
if (ENABLE_LOGS)
Log.e(LOG_TAG, "PLAY started...");
Toast.makeText(context, "PLAY started...",
Toast.LENGTH_LONG).show();
} else {
mediaplayer.stop();
}
以下是我得到的错误
12-12 12:00:01.186: E/com.brcm.factorymode.audioloop.AudioLoopFtmTestActivity(1860): Record started
12-12 12:00:04.467: E/com.brcm.factorymode.audioloop.AudioLoopFtmTestActivity(1860): Record is going to be stoped...
12-12 12:00:04.592: E/com.brcm.factorymode.audioloop.AudioLoopFtmTestActivity(1860): Record STOPPED....
12-12 12:00:06.710: W/MediaPlayer(1860): info/warning (1, 26)
12-12 12:00:06.725: E/MediaPlayer(1860): error (1, -17)
12-12 12:00:06.725: W/System.err(1860): java.io.IOException: Prepare failed.: status=0x1
12-12 12:00:06.725: W/System.err(1860): at android.media.MediaPlayer.prepare(Native Method)
12-12 12:00:06.725: W/System.err(1860): at com.brcm.factorymode.audioloop.AudioLoopFtmTestActivity$3.onClick(AudioLoopFtmTestActivity.java:155)
12-12 12:00:06.725: W/System.err(1860): at android.view.View.performClick(View.java:2364)
12-12 12:00:06.725: W/System.err(1860): at android.view.View.onTouchEvent(View.java:4179)
12-12 12:00:06.725: W/System.err(1860): at android.widget.TextView.onTouchEvent(TextView.java:6534)
12-12 12:00:06.725: W/System.err(1860): at android.view.View.dispatchTouchEvent(View.java:3709)
12-12 12:00:06.725: W/System.err(1860): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:883)
12-12 12:00:06.725: W/System.err(1860): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:883)
12-12 12:00:06.725: W/System.err(1860): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:883)
12-12 12:00:06.725: W/System.err(1860): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:883)
12-12 12:00:06.725: W/System.err(1860): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:883)
12-12 12:00:06.725: W/System.err(1860): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1659)
12-12 12:00:06.725: W/System.err(1860): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107)
12-12 12:00:06.725: W/System.err(1860): at android.app.Activity.dispatchTouchEvent(Activity.java:2061)
12-12 12:00:06.725: W/System.err(1860): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643)
12-12 12:00:06.725: W/System.err(1860): at android.view.ViewRoot.handleMessage(ViewRoot.java:1691)
12-12 12:00:06.725: W/System.err(1860): at android.os.Handler.dispatchMessage(Handler.java:99)
12-12 12:00:06.725: W/System.err(1860): at android.os.Looper.loop(Looper.java:123)
12-12 12:00:06.733: W/System.err(1860): at android.app.ActivityThread.main(ActivityThread.java:4338)
12-12 12:00:06.741: W/System.err(1860): at java.lang.reflect.Method.invokeNative(Native Method)
12-12 12:00:06.741: W/System.err(1860): at java.lang.reflect.Method.invoke(Method.java:521)
12-12 12:00:06.741: W/System.err(1860): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
12-12 12:00:06.741: W/System.err(1860): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
12-12 12:00:06.741: W/System.err(1860): at dalvik.system.NativeStart.main(Native Method)
12-12 12:00:06.741: E/com.brcm.factorymode.audioloop.AudioLoopFtmTestActivity(1860): CASE VALUE : 0
12-12 12:00:06.749: E/MediaPlayer(1860): start called in state 0
12-12 12:00:06.749: E/MediaPlayer(1860): error (-38, 0)
12-12 12:00:06.749: E/com.brcm.factorymode.audioloop.AudioLoopFtmTestActivity(1860): PLAY started...
12-12 12:00:06.756: I/MediaPlayer(1860): Info (1,26)
12-12 12:00:06.756: E/MediaPlayer(1860): Error (-38,0)
任何人都可以告诉我解决这个问题的方法。
答案 0 :(得分：0)
实现OnCompletionListener并将其注册到您的MediaPlayer实例。
播放媒体后，它将在完成
上调用此回调方法void onCompletion(MediaPlayer mp){
//Here you stop it.
mp.stop();
//Reset the data source path to the new file
mp.setDataSource(<uri>);
mp.prepare(); // or mp.prepareAsync();
// start the mediaplayer after the prepare has completed.
}
完成播放所有文件后，释放媒体播放器实例。