Calling MediaRecorder in Android Studio crashes the application
I
was trying to create a class to set up and start recording, but the app crashes when I click the button. I isolate the problem to where I set the parameters for MediRecorder.
private void startRec() throws IOException {
if (mrecorder!=null)
mrecorder.release();
mrecorder= new MediaRecorder();
-> mrecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
/*
mrecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mrecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
mrecorder.setOutputFile(MFILE);
mrecorder.prepare();
mrecorder.start();
*/
}
When executing a line with an arrow above the beginning of a comment, it crashes. I’ve also added the following permissions to list:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
Any help is greatly appreciated.
UPDATED LOGCAT
[ 05-12 00:39:13.299 30086:30158 D/]
ro.exynos.dss enabled: 0
05-12 00:39:13.309 30086-30158/record66.record6 D/mali_winsys:new_window_surface returns 0x3000,[1440×2560]-format: 1
05-12 00:39:13.319 30086-30086/record66.record6 W/DisplayListCanvas: DisplayListCanvas starts on an unbound (bind) RenderNode (no mOwningView)
05-12 00:39:13.319 30086-30158/record66.record6 D/libGLESv1: DTS_GLAPI: DTS is not allowed for package: record66.record6
05-12 00:39:13.359 30086-30086/record66.record6 D/ViewRootImpl: MSG_RESIZED_REPORT: ci=Rect(0, 96 – 0, 0) vi=Rect(0, 96 – 0, 0) or=1
05-12 00:39:13.389 30086-30086/record66.record6 I/Timeline: Timeline: Activity_idle ID: [email protected] Time: 234401322
05-12 00:39:15.749 30086-30086/record66.record6 D/ViewRootImpl: ViewPostImeInputStage processPointer 0
05-12 00:39:15.879 30086-30086/record66.record6 D/ViewRootImpl: ViewPostImeInputStage processPointer 1
05-12 00:39:15.929 30086-30086/record66.record6 D/AndroidRuntime: Shut down the VM
05-12 00:39:15.939 30086-30086/record66.record6 E/AndroidRuntime: Fatal Exception: Primary
Process: record66.record6, PID: 30086
java.lang.RuntimeException: setAudioSource failed.
In android.media.MediaRecorder._setAudioSource (native method)
In android.media.MediaRecorder.setAudioSource(MediaRecorder.java:488)
in record66.record6.MainActivity.startRec(MainActivity.java:58)
in record66.record6.MainActivity.onClick(MainActivity.java:94)
In android.view.View.performClick (View.java:5697)
In android.widget.TextView.performClick(TextView.java:10815)
In android.view.View$PerformClick.run(View.java:22526)
In android.os.Handler.handleCallback (Handler.java:739)
In android.os.Handler.dispatchMessage (Handler.java:95)
In android.os.Looper.loop (Looper.java:158)
In android.app.ActivityThread.main(ActivityThread.java:7229)
In java.lang.reflect.Method.invoke( native method)
In com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
In com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
05-12 00:39:17.909 30086-30086/record66.record6 I/Process: Send signal. PID:30086 SIG:9
Solution
See what< a href="http://developer.android.com/tools/debugging/debugging-studio.html#systemLog" rel="noreferrer noopener nofollow">logcat is.
Let us know what error you encountered. So it can help.
package com.example.dhrupalpatel.test;
import android.app.Activity;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import java.io.File;
import java.io.IOException;
public class MainActivity extends Activity implements View.OnClickListener{
MediaRecorder mrecorder;
boolean mStartRecording=false;
Button start, stop;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
start =(Button)findViewById(R.id.start);
stop =(Button)findViewById(R.id.stop);
start.setOnClickListener(this);
stop.setOnClickListener(this);
}
private void startRec() throws IOException {
boolean mExternalStorageAvailable = false;
boolean mExternalStorageWriteable = false;
String state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(state)) {
We can read and write the media
mExternalStorageAvailable = mExternalStorageWriteable = true;
} else if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {
We can only read the media
mExternalStorageAvailable = true;
mExternalStorageWriteable = false;
} else {
Something else is wrong. It may be one of many other states, but all we need
to know is we can neither read nor write
mExternalStorageAvailable = mExternalStorageWriteable = false;
}
File sdCardDirectory= Environment
.getExternalStorageDirectory();
if(mExternalStorageAvailable && !sdCardDirectory.exists())
{
sdCardDirectory.mkdir();
}
File f= new File(sdCardDirectory.getPath()+"/"+System.currentTimeMillis()+".mp3");
if( mrecorder == null ) {
mrecorder = new MediaRecorder();
mrecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mrecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mrecorder.setOutputFile(f.getPath());
mrecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
}
if(!mStartRecording) {
try {
mrecorder.prepare();
mrecorder.start();
mStartRecording = true;
} catch (IOException e) {
e.printStackTrace();
}
}
}
private void stopRec() throws IOException {
if(mStartRecording) {
mStartRecording = false;
mrecorder.stop();
mrecorder.reset();
mrecorder.release();
mrecorder = null;
}
}
@Override
public void onClick(View v) {
switch (v.getId())
{
case R.id.start:
try {
startRec();
} catch (IOException e) {
e.printStackTrace();
}
break;
case R.id.stop:
try {
stopRec();
} catch (IOException e) {
e.printStackTrace();
}
break;
}
}
}