我有这个方法,
if(null != recorder){
recorder.stop();
recorder.reset();
recorder.release();
recorder = null;
}
为什么它强制关闭我的应用程序?
提前致谢!
这是我的 VoiceRecording2.java .. 它有按钮,开始按钮和停止按钮并选择格式..
package com.example.voicexml;
import java.io.File;
import java.io.IOException;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.widget.Button;
public class VoiceRecording2 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";
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.voice);
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 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(){
}
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() {
public void onClick(DialogInterface dialog, int which) {
currentFormat = which;
setFormatButtonCaption();
dialog.dismiss();
}
})
.show();
}
private MediaRecorder.OnErrorListener errorListener = new MediaRecorder.OnErrorListener() {
public void onError(MediaRecorder mr, int what, int extra) {
AppLog.logString("Error: " + what + ", " + extra);
}
};
private MediaRecorder.OnInfoListener infoListener = new MediaRecorder.OnInfoListener() {
public void onInfo(MediaRecorder mr, int what, int extra) {
AppLog.logString("Warning: " + what + ", " + extra);
}
};
private View.OnClickListener btnClick = new View.OnClickListener() {
public void onClick(View v) {
switch(v.getId()){
case R.id.btnStart:{
AppLog.logString("Start Recording");
enableButtons(true);
startRecording();
break;
}
case R.id.btnStop:{
if(null != recorder){
//recorder.stop();
//recorder.reset();
//recorder.release();
System.out.println("Churva");
//recorder = null;
}
AppLog.logString("Start Recording");
enableButtons(false);
//stopRecording();
break;
}
case R.id.btnFormat:{
displayFormatDialog();
break;
}
}
}
};
}
它是一个简单的 porgram,可以在您的 android 设备中录制声音。