Question

我正在开发一个Android应用程序，并且在任何地方都没有错误，但是当我在手机上运行它时，在应用程序打开后我点击一个按钮，过了一会儿它突然关闭并给了我消息“遗憾的是**已经停止了”。

有人可以告诉我出了什么问题吗？

我做了一些研究，发现当清单中有错误时会出现此消息。这是我的清单，我无法弄清楚出了什么问题？

 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 package="com.example.tryagain"
 android:versionCode="1"
 android:versionName="1.0" >

<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />

<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
    android:name=".MainActivity"
    android:label="@string/app_name" >
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />

        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
   </activity>
   </application>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
   <uses-permission android:name="android.permission.RECORD_AUDIO" />

   </manifest>

这是我的.java：

public class MainActivity extends Activity {
private static final int RECORDER_SAMPLERATE = 8000;
private static final int RECORDER_CHANNELS = AudioFormat.CHANNEL_IN_MONO;
private static final int RECORDER_AUDIO_ENCODING = AudioFormat.ENCODING_PCM_16BIT;
private AudioRecord recorder = null;
private Thread recordingThread = null;
private boolean isRecording = false;
ArrayList <Short> x=new ArrayList<Short>();

ArrayList <Short> y=new ArrayList<Short>();

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

setButtonHandlers();
enableButtons(false);

int bufferSize = AudioRecord.getMinBufferSize(RECORDER_SAMPLERATE,
        RECORDER_CHANNELS, RECORDER_AUDIO_ENCODING);

//why is the following statement here???
System.out.println("BUFFER SIZE VALUE IS " + bufferSize);

}

 private void setButtonHandlers() {
((Button) findViewById(R.id.btnStart)).setOnClickListener(btnClick);
((Button) findViewById(R.id.btnStop)).setOnClickListener(btnClick);
((Button) findViewById(R.id.Start2)).setOnClickListener(btnClick2);
((Button) findViewById(R.id.Stop2)).setOnClickListener(btnClick2);


 }

 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.btnStop, isRecording);
enableButton(R.id.Start2, !isRecording);
enableButton(R.id.Stop2, isRecording);

 }

int BufferElements2Rec = 1024; 

 int BytesPerElement = 2; // 2 bytes in 16bit format

 private void startRecording() {

recorder = new AudioRecord(MediaRecorder.AudioSource.MIC,
        RECORDER_SAMPLERATE, RECORDER_CHANNELS,
        RECORDER_AUDIO_ENCODING, BufferElements2Rec * BytesPerElement);

recorder.startRecording();

isRecording = true;

recordingThread = new Thread(new Runnable() {

    public void run() {

        writeAudioDataToFile();

    }
 }, "AudioRecorder Thread");
 recordingThread.start();
  }


  private void startRecording2() {

  recorder = new AudioRecord(MediaRecorder.AudioSource.MIC,
        RECORDER_SAMPLERATE, RECORDER_CHANNELS,
        RECORDER_AUDIO_ENCODING, BufferElements2Rec * BytesPerElement);

   recorder.startRecording();
   isRecording = true;

  recordingThread = new Thread(new Runnable() {

    public void run() {

        writeAudioDataToFile2();

    }
   },  "AudioRecorder Thread");
  recordingThread.start();
    }


private byte[] short2byte(short[] sData) {
int shortArrsize = sData.length;
byte[] bytes = new byte[shortArrsize * 2];

for (int i = 0; i < shortArrsize; i++) {
    bytes[i * 2] = (byte) (sData[i] & 0x00FF);
    bytes[(i * 2) + 1] = (byte) (sData[i] >> 8);
    sData[i] = 0;
}
return bytes;
}

  private void writeAudioDataToFile() {
// Write the output audio in byte

String filePath = "/storage/sdcard0/Sounds/recording1.pcm";



short sData[] = new short[BufferElements2Rec];
// to convert sData from short to Short:


FileOutputStream os = null;
try {
    os = new FileOutputStream(filePath);
} catch (FileNotFoundException e) {
    e.printStackTrace();
}

while (isRecording) {
    // gets the voice output from microphone to byte format and stores it in buffer sData

    recorder.read(sData, 0, BufferElements2Rec);
// here u will write the new code: to store what was said in an array,,, here we are 
    Short sData1= sData[BufferElements2Rec];
    int i=0; 
    x.add(i,sData1);
    i++;

    System.out.println("Short wirting to file" + sData.toString());
    try {
        // // writes the data to file from buffer
        // // stores the voice buffer

        byte bData[] = short2byte(sData);

        os.write(bData, 0, BufferElements2Rec * BytesPerElement);
    } 

    catch (IOException e) {
        e.printStackTrace();
    }
     }

  try {
    os.close();
   } catch (IOException e) {
    e.printStackTrace();
}
} //END OF WRITE TO FILE METHOD


private void writeAudioDataToFile2() {
// Write the output audio in byte

String filePath = "/storage/sdcard0/Sounds/recording2.pcm";



short sData[] = new short[BufferElements2Rec];
// to convert sData from short to Short:



FileOutputStream os = null;
try {
    os = new FileOutputStream(filePath);
} catch (FileNotFoundException e) {
    e.printStackTrace();
}

while (isRecording) {
    // gets the voice output from microphone to byte format and stores it in buffer sData

    recorder.read(sData, 0, BufferElements2Rec);
// here u will write the new code: to store what was said in an array,,, here we are 
    Short sData1= sData[BufferElements2Rec];
    int i=0; 
    y.add(i,sData1);
    i++;

    System.out.println("Short wirting to file" + sData.toString());
    try {
        // // writes the data to file from buffer
        // // stores the voice buffer

        byte bData[] = short2byte(sData);

        os.write(bData, 0, BufferElements2Rec * BytesPerElement);
    } 

    catch (IOException e) {
        e.printStackTrace();
    }
}

try {
    os.close();
} catch (IOException e) {
    e.printStackTrace();
}
} //END OF WRITE TO FILE METHOD


 private void stopRecording() {
// stops the recording activity
if (null != recorder) {
    isRecording = false;

    recorder.stop();
    recorder.release();

    recorder = null;
    recordingThread = null;
}
}

private View.OnClickListener btnClick = new View.OnClickListener() {
public void onClick(View v) {
    switch (v.getId()) {
    case R.id.btnStart: {
        enableButtons(true);
        startRecording();
        break;
    }
    case R.id.btnStop: {
        enableButtons(false);
        stopRecording();
        break;
    }
    }
    }
    };

   private View.OnClickListener btnClick2 = new View.OnClickListener() {
    public void onClick(View v) {
    switch (v.getId()) {
    case R.id.Start2: {
        enableButtons(true);
        startRecording2();
        break;
    }
    case R.id.Stop2: {
        enableButtons(false);
        stopRecording();
        break;
    }
    }
   }
   };


  @Override
  public boolean onKeyDown(int keyCode, KeyEvent event) {

  if (keyCode == KeyEvent.KEYCODE_BACK) {

    finish();
   }
     return super.onKeyDown(keyCode, event);
  }
  }

这是我的logCat

   06-27 16:50:46.830: I/System.out(11939): BUFFER SIZE VALUE IS 2048
   06-27 16:50:46.980: D/libEGL(11939): loaded /vendor/lib/egl/libGLES_vc4.so
   06-27 16:50:46.980: D/(11939): SpyHook inactive - could not find libspyhook.so [Symbol not      found: ] or not enabled (debug.egl.hw.spy = 0)
   06-27 16:50:47.000: W/khrn_client(11939): init_window num_buffers 3 min undequeued buffers 1 type 1
   06-27 16:50:47.000: W/khrn_client(11939): init_window window 0x50eda0d8, 480x800 hintTransform 0x0
   06-27 16:50:47.030: D/OpenGLRenderer(11939): Enabling debug mode 0
   06-27 16:50:53.066: W/dalvikvm(11939): threadid=12: thread exiting with uncaught exception (group=0x40fb72a0)
   06-27 16:50:53.066: E/AndroidRuntime(11939): FATAL EXCEPTION: AudioRecorder Thread
   06-27 16:50:53.066: E/AndroidRuntime(11939): java.lang.ArrayIndexOutOfBoundsException:     length=1024; index=1024 
  06-27 16:50:53.066: E/AndroidRuntime(11939):  at        com.example.tryagain.MainActivity.writeAudioDataToFile(MainActivity.java:148)
  06-27 16:50:53.066: E/AndroidRuntime(11939):  at com.example.tryagain.MainActivity.access$4(MainActivity.java:125)
 06-27 16:50:53.066: E/AndroidRuntime(11939):   at         com.example.tryagain.MainActivity$3.run(MainActivity.java:84)
 06-27 16:50:53.066: E/AndroidRuntime(11939):   at java.lang.Thread.run(Thread.java:856)

Answer 1

那么，这些行

06-27 16:50:53.066: E/AndroidRuntime(11939): java.lang.ArrayIndexOutOfBoundsException:     length=1024; index=1024 
06-27 16:50:53.066: E/AndroidRuntime(11939):  at com.example.tryagain.MainActivity.writeAudioDataToFile(MainActivity.java:148)

告诉您，在第148行，您尝试在长度为1024的数组中访问索引号1024。您应该始终运行length - 1

检查第148行（如果你不明白那里的错误，可以在评论中发布）。

祝你好运

Answer 2

这不是一个直接的答案，但会帮助您阅读您的logcat并自行调试并发布大多数相关代码，以便我们可以更有效地帮助并防止downvotes和关闭

如果您在

之后查找该行

 FATAL EXCEPTION: AudioRecorder Thread

它会给你错误

  06-27 16:50:53.066: E/AndroidRuntime(11939): java.lang.ArrayIndexOutOfBoundsException:     length=1024; index=1024

在这里，您尝试访问Array中的索引，该索引是它的长度（您将获得Array长度和index，而您最终会尝试访问该索引。因为我们知道ArrayIndexOutOfBoundsException以Arrays为0开始，所以它会抛出index。然后找到引用代码的第一行

  06-27 16:50:53.066: E/AndroidRuntime(11939):  at        com.example.tryagain.MainActivity.writeAudioDataToFile(MainActivity.java:148)

这告诉我们MainActivity函数中writeAudioDataToFile()的第148行发生异常

Answer 3

在阅读了@codeMagic的内容之后，我读了LogCat，然后我加倍点击

      06-27 16:50:53.066: E/AndroidRuntime(11939):  at        com.example.tryagain.MainActivity.writeAudioDataToFile(MainActivity.java:148)

它告诉我问题在哪里

Short sData1= sData[BufferElements2Rec];

然后我用

替换它

Short sData1= sData[i];

感谢所有帮助过我的人。

不幸的是申请已停止？

3 个答案: