按照教程写了个安卓的录音程序，在点击结束录音时闪退，求大神帮看看代码，感谢
闪退时报错日志
04-08 19:47:29.702: D/ViewRootImpl(11731): ViewPostImeInputStage processPointer 0
04-08 19:47:29.802: D/ViewRootImpl(11731): ViewPostImeInputStage processPointer 1
04-08 19:47:29.802: E/MediaRecorder(11731): stop called in an invalid state: 4
04-08 19:47:29.802: D/AndroidRuntime(11731): Shutting down VM
04-08 19:47:29.802: E/AndroidRuntime(11731): FATAL EXCEPTION: main
04-08 19:47:29.802: E/AndroidRuntime(11731): Process: com.example.recorder, PID: 11731
04-08 19:47:29.802: E/AndroidRuntime(11731): java.lang.IllegalStateException
04-08 19:47:29.802: E/AndroidRuntime(11731): at android.media.MediaRecorder._stop(Native Method)
04-08 19:47:29.802: E/AndroidRuntime(11731): at android.media.MediaRecorder.stop(MediaRecorder.java:976)
04-08 19:47:29.802: E/AndroidRuntime(11731): at com.example.recorder.MainActivity.stop(MainActivity.java:102)
04-08 19:47:29.802: E/AndroidRuntime(11731): at com.example.recorder.MainActivity$2.onClick(MainActivity.java:61)
04-08 19:47:29.802: E/AndroidRuntime(11731): at android.view.View.performClick(View.java:5698)
04-08 19:47:29.802: E/AndroidRuntime(11731): at android.widget.TextView.performClick(TextView.java:10896)
04-08 19:47:29.802: E/AndroidRuntime(11731): at android.view.View$PerformClick.run(View.java:22565)
04-08 19:47:29.802: E/AndroidRuntime(11731): at android.os.Handler.handleCallback(Handler.java:739)
04-08 19:47:29.802: E/AndroidRuntime(11731): at android.os.Handler.dispatchMessage(Handler.java:95)
04-08 19:47:29.802: E/AndroidRuntime(11731): at android.os.Looper.loop(Looper.java:148)
04-08 19:47:29.802: E/AndroidRuntime(11731): at android.app.ActivityThread.main(ActivityThread.java:7224)
04-08 19:47:29.802: E/AndroidRuntime(11731): at java.lang.reflect.Method.invoke(Native Method)
04-08 19:47:29.802: E/AndroidRuntime(11731): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
04-08 19:47:29.802: E/AndroidRuntime(11731): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
04-08 19:47:32.042: I/Process(11731): Sending signal. PID: 11731 SIG: 9
DEBUG
线程 [main]（已暂挂（异常 IllegalStateException））
MediaRecorder._stop() 行： 不可用 [本机方法]
MediaRecorder.stop() 行： 976
MainActivity.stop() 行： 102
MainActivity$2.onClick(View) 行： 61
Button(View).performClick() 行： 5698
Button(TextView).performClick() 行： 10896
View$PerformClick.run() 行： 22565
Handler.handleCallback(Message) 行： 739
ViewRootImpl$ViewRootHandler(Handler).dispatchMessage(Message) 行： 95
Looper.loop() 行： 148
ActivityThread.main(String[]) 行： 7224
Method.invoke(Object, Object...) 行： 不可用 [本机方法]
ZygoteInit$MethodAndArgsCaller.run() 行： 1230
ZygoteInit.main(String[]) 行： 1120
主程序
package com.example.recorder;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import java.io.IOException;
import android.media.MediaRecorder;
import android.media.AudioFormat;
import android.media.AudioRecord;
import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.util.Log;
import android.widget.Button;
import java.io.BufferedOutputStream;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
public class MainActivity extends Activity {
MediaRecorder audioRecorder;
Button START;
Button END;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//creat
START=(Button)findViewById(R.id.start);
END=(Button)findViewById(R.id.end);
START.setOnClickListener(new View.OnClickListener()
{
public void onClick(View arg0)
{
record();
}
});
END.setOnClickListener(new View.OnClickListener()
{
public void onClick(View arg0)
{
stop();
}
});
}
public void record()
{
if(audioRecorder==null)
{
audioRecorder=new MediaRecorder();
}
String path=Environment.getExternalStorageDirectory().getAbsolutePath()+"/test.mp4";
File file=new File(path);
if(file.exists())
file.delete();
try
{
file.createNewFile();
audioRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
audioRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
audioRecorder.setAudioEncodingBitRate(MediaRecorder.AudioEncoder.AMR_NB);
audioRecorder.setOutputFile(path);
audioRecorder.prepare();
audioRecorder.start();
}
catch(IOException e)
{
e.printStackTrace();
}
catch (IllegalStateException e)
{
e.printStackTrace();
}
START.setText("recording");
}
public void stop()
{
if(audioRecorder!=null)
{
audioRecorder.stop();
audioRecorder.release();
audioRecorder=null;
}
START.setText("录音");
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings)
{
return true;
}
return super.onOptionsItemSelected(item);
}
}
MANIFEXT:
<?xml version="1.0" encoding="utf-8"?>
package="com.example.recorder"
android:versionCode="1"
android:versionName="1.0" >
android:minSdkVersion="19"
android:targetSdkVersion="19" />
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
android:name=".MainActivity"
android:label="@string/app_name" >
