MediaRecorder crashes on start
i've searched many topics but no straight answer.
I have this code :
recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setOutputFile(mFileName);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
if(!mStartRecording)
{
btn.setText("Stop Recording");
try {
recorder.prepare();
} catch (IOException e) {
e.printStackTrace();
}
recorder.start();
mStartRecording = true;
}
else
{
btn.setText("Start Recording");
mStartRecording = false;
recorder.stop();
recorder.reset();
recorder.release();
recorder = null;
}
And i've added :
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.STORAGE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
(saw somewhere that adding STORAGE solved it, no good for me)
I'm developing on API Level 7 (Android 2.1)
stack trace says "start faild" Stack trace :
04-26 19:27:41.955: D/dalvikvm(890): GC freed 809 objects / 58272 bytes in 433ms
04-26 19:27:44.772: D/dalvikvm(890): GC freed 95 objects / 3936 bytes in 371ms
04-26 19:28:54.973: E/MediaRecorder(890): start failed: -1
04-26 19:28:54.993: D/AndroidRuntime(890): Shutting down VM
04-26 19:28:54.993: W/dalvikvm(890): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
04-26 19:28:54.993: E/AndroidRuntime(890): Uncaught handler: thread main exiting due to uncaught exception
04-26 19:28:55.105: E/AndroidRuntime(890): java.lang.IllegalStateException: Could not execute method of the activity
04-26 19:28:55.105: E/AndroidRuntime(890): at android.view.View$1.onClick(View.java:2031)
04-26 19:28:55.105: E/AndroidRuntime(890): at android.view.View.performClick(View.java:2364)
04-26 19:28:55.105: E/AndroidRuntime(890): at android.view.View.onTouchEvent(View.java:4179)
04-26 19:28:55.105: E/AndroidRuntime(890): at android.widget.TextView.onTouchEvent(TextView.java:6541)
04-26 19:28:55.105: E/AndroidRuntime(890): at android.view.View.dispatchTouchEvent(View.java:3709)
04-26 19:28:55.105: E/AndroidRuntime(890): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
04-26 19:28:55.105: E/AndroidRuntime(890): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
04-26 19:28:55.105: E/AndroidRuntime(890): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
04-26 19:28:55.105: E/AndroidRuntime(890): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
04-26 19:28:55.105: E/AndroidRuntime(890): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1659)
04-26 19:28:55.105: E/AndroidRuntime(890): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107)
04-26 19:28:55.105: E/AndroidRuntime(890): at android.app.Activity.dispatchTouchEvent(Activity.java:2061)
04-26 19:28:55.105: E/AndroidRuntime(890): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643)
04-26 19:28:55.105: E/AndroidRuntime(890): at android.view.ViewRoot.handleMessage(ViewRoot.java:1691)
04-26 19:28:55.105: E/AndroidRuntime(890): at android.os.Handler.dispatchMessage(Handler.java:99)
04-26 19:28:55.105: E/AndroidRuntime(890): at android.os.Looper.loop(Looper.java:123)
04-26 19:28:55.105: E/AndroidRuntime(890): at android.app.ActivityThread.main(ActivityThread.java:4363)
04-26 19:28:55.105: E/AndroidRuntime(890): at java.lang.reflect.Method.invokeNative(Native Method)
04-26 19:28:55.105: E/AndroidRuntime(890): at java.lang.reflect.Method.invoke(Method.java:521)
04-26 19:28:55.105: E/AndroidRuntime(890): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
04-26 19:28:55.105: E/AndroidRuntime(890): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
04-26 19:28:55.105: E/AndroidRuntime(890): at dalvik.system.NativeStart.main(Native Method)
04-26 19:28:55.105: E/AndroidRuntime(890): Caused by: java.lang.reflect.InvocationTargetException
04-26 19:28:55.105: E/AndroidRuntime(890): at shibby.whisper.WhisperGameActivity.recordAudio(WhisperGameActivity.java:94)
04-26 19:28:55.105: E/AndroidRuntime(890): at java.lang.reflect.Method.invokeNative(Native Method)
04-26 19:28:55.105: E/AndroidRuntime(890): at java.lang.reflect.Method.invoke(Method.java:521)
04-26 19:28:55.105: E/AndroidRuntime(890): at android.view.View$1.onClick(View.java:2026)
04-26 19:28:55.105: E/AndroidRuntime(890): ... 21 more
04-26 19:28:55.105: E/AndroidRuntime(890): Caused by: java.lang.RuntimeException: start failed.
04-26 19:28:55.105: E/AndroidRuntime(890): at android.media.MediaRecorder.start(Native Method)
04-26 19:28:55.105: E/AndroidRuntime(890): ... 25 more
04-26 19:28:55.223: I/dalvikvm(890): threadid=7: reacting to signal 3
04-26 19:28:55.335: I/dalvikvm(890): Wrote stack trace to '/data/anr/traces.txt'
04-26 19:28:57.123: I/Process(890): Sending signal. PID: 890 SIG: 9
Please help.
Answer
Ok, I got it. I guess you initialized mStartRecording to true.
Thus your if is going into the else block. In it, you stop a brand new instance of MediaRecorder and the state diagram doesn't allow that.
Make your media recorder a field of your class. And initialize properly your mStartRecording boolean variable to false. Re instanciate your media recorder only if your field is null.
if( recorder == null ) {
recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setOutputFile(mFileName);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
}//if
if(!mStartRecording) {
btn.setText("Stop Recording");
try {
recorder.prepare();
recorder.start();
mStartRecording = true;
} catch (IOException e) {
e.printStackTrace();
}//catch
} else {
btn.setText("Start Recording");
mStartRecording = false;
recorder.stop();
recorder.reset();
recorder.release();
recorder = null;
}//else