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PORuntimeException: start failed in AudioRecording
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copied!<p>Ham doing audio recording in my project. The problem is ham getting runtime exception in my project.</p> <pre><code> 12-02 14:58:47.145: E/AndroidRuntime(22802): FATAL EXCEPTION: main 12-02 14:58:47.145: E/AndroidRuntime(22802): java.lang.RuntimeException: start failed. 12-02 14:58:47.145: E/AndroidRuntime(22802): at android.media.MediaRecorder.start(Native Method) 12-02 14:58:47.145: E/AndroidRuntime(22802): at com.android.audio.AudioRecordActivity.startRecording(AudioRecordActivity.java:80) 12-02 14:58:47.145: E/AndroidRuntime(22802): at com.android.audio.AudioRecordActivity.access$1(AudioRecordActivity.java:67) 12-02 14:58:47.145: E/AndroidRuntime(22802): at com.android.audio.AudioRecordActivity$3.onClick(AudioRecordActivity.java:138) 12-02 14:58:47.145: E/AndroidRuntime(22802): at android.view.View.performClick(View.java:3460) 12-02 14:58:47.145: E/AndroidRuntime(22802): at android.view.View$PerformClick.run(View.java:13955) 12-02 14:58:47.145: E/AndroidRuntime(22802): at android.os.Handler.handleCallback(Handler.java:605) 12-02 14:58:47.145: E/AndroidRuntime(22802): at android.os.Handler.dispatchMessage(Handler.java:92) 12-02 14:58:47.145: E/AndroidRuntime(22802): at android.os.Looper.loop(Looper.java:137) 12-02 14:58:47.145: E/AndroidRuntime(22802): at android.app.ActivityThread.main(ActivityThread.java:4340) 12-02 14:58:47.145: E/AndroidRuntime(22802): at java.lang.reflect.Method.invokeNative(Native Method) 12-02 14:58:47.145: E/AndroidRuntime(22802): at java.lang.reflect.Method.invoke(Method.java:511) 12-02 14:58:47.145: E/AndroidRuntime(22802): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784) 12-02 14:58:47.145: E/AndroidRuntime(22802): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551) 12-02 14:58:47.145: E/AndroidRuntime(22802): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>when I debug and I'm getting the error in this particular line of code: </p> <p>recorder.start();</p> <p>My source code is as follows</p> <pre><code> package com.android.audio; import java.io.BufferedInputStream; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.MalformedURLException; import java.net.URL; import org.apache.http.util.ByteArrayBuffer; import android.app.Activity; import android.app.AlertDialog; import android.content.ContentValues; import android.content.DialogInterface; import android.content.Intent; import android.media.MediaRecorder; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.provider.MediaStore; import android.util.Log; import android.view.View; import android.widget.Button; public class AudioRecordActivity extends Activity { private static final String AUDIO_RECORDER_FILE_EXT_3GP = ".3gp"; private static final String AUDIO_RECORDER_FILE_EXT_MP4 = ".mp4"; private static final String AUDIO_RECORDER_FOLDER = "AudioRecorder"; File file; private MediaRecorder recorder = null; private int currentFormat = 0; private int output_formats[] = { MediaRecorder.OutputFormat.MPEG_4, MediaRecorder.OutputFormat.THREE_GPP }; private String file_exts[] = { AUDIO_RECORDER_FILE_EXT_MP4, AUDIO_RECORDER_FILE_EXT_3GP }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); setButtonHandlers(); enableButtons(false); setFormatButtonCaption(); } private void setButtonHandlers() { ((Button)findViewById(R.id.btnStart)).setOnClickListener(btnClick); ((Button)findViewById(R.id.btnStop)).setOnClickListener(btnClick); ((Button)findViewById(R.id.btnFormat)).setOnClickListener(btnClick); } private void enableButton(int id,boolean isEnable){ ((Button)findViewById(id)).setEnabled(isEnable); } private void enableButtons(boolean isRecording) { enableButton(R.id.btnStart,!isRecording); enableButton(R.id.btnFormat,!isRecording); enableButton(R.id.btnStop,isRecording); } private void setFormatButtonCaption(){ ((Button)findViewById(R.id.btnFormat)).setText(getString(R.string.audio_format) + " (" + file_exts[currentFormat] + ")"); } private String getFilename(){ String filepath = Environment.getExternalStorageDirectory().getPath(); file = new File(filepath,AUDIO_RECORDER_FOLDER); if(!file.exists()){ file.mkdirs(); } return (file.getAbsolutePath() + "/" + System.currentTimeMillis() + file_exts[currentFormat]); } private void startRecording(){ recorder = new MediaRecorder(); recorder.setAudioSource(MediaRecorder.AudioSource.MIC); recorder.setOutputFormat(output_formats[currentFormat]); recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); recorder.setOutputFile(getFilename()); recorder.setOnErrorListener(errorListener); recorder.setOnInfoListener(infoListener); try { recorder.prepare(); recorder.start(); } catch (IllegalStateException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } private void stopRecording(){ if(null != recorder){ recorder.stop(); recorder.reset(); recorder.release(); recorder = null; } } private void displayFormatDialog(){ AlertDialog.Builder builder = new AlertDialog.Builder(this); String formats[] = {"MPEG 4", "3GPP"}; builder.setTitle(getString(R.string.choose_format_title)) .setSingleChoiceItems(formats, currentFormat, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { currentFormat = which; setFormatButtonCaption(); dialog.dismiss(); } }) .show(); } private MediaRecorder.OnErrorListener errorListener = new MediaRecorder.OnErrorListener() { @Override public void onError(MediaRecorder mr, int what, int extra) { AppLog.logString("Error: " + what + ", " + extra); } }; private MediaRecorder.OnInfoListener infoListener = new MediaRecorder.OnInfoListener() { @Override public void onInfo(MediaRecorder mr, int what, int extra) { AppLog.logString("Warning: " + what + ", " + extra); } }; private View.OnClickListener btnClick = new View.OnClickListener() { @Override public void onClick(View v) { switch(v.getId()){ case R.id.btnStart:{ AppLog.logString("Start Recording"); enableButtons(true); startRecording(); break; } case R.id.btnStop:{ AppLog.logString("Start Recording"); enableButtons(false); stopRecording(); break; } case R.id.btnFormat:{ displayFormatDialog(); break; } } } }; } </code></pre>

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