android - Android上线程中的堆栈溢出异常

Question

我正在编写计算媒体文件 bpm 的代码。我的要求是我只能播放 5 秒不超过 5 秒的歌曲。所以我使用 Thread.sleep(5000) 并调用处理程序消息。它抛出 java.long.stackoverflowexception。

我的代码:

currentThread.start(); 
....    
    public void run() {
        try {
            Log.e("bpm", "in run method");
            BPM2SampleProcessor processor = new BPM2SampleProcessor();
            processor.setSampleSize(1024);
            EnergyOutputAudioDevice output = new EnergyOutputAudioDevice(processor);     
            output.setAverageLength(1024);      
            try {
                player = new Player(new FileInputStream("/sdcard/taxi.mp3"), output); // line no 40
                currentThread.run();  // line no 41
                player.play();
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (JavaLayerException e) {
                e.printStackTrace();
            }
           text.setText("bpm is  "+processor.getBPM());
           Log.e("bpm","  bpm is  "+processor.getBPM());            
           Thread.sleep(5000);
       threadHandler.sendEmptyMessage(0);
                         Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }       
    }

private Handler threadHandler = new Handler() 
{
    public void handleMessage(android.os.Message msg) 
    {
     Log.e("calledThread","5seconds");  
     player.close();
    }
};  

日志猫:

  05-20 18:05:01.761: ERROR/AndroidRuntime(2777): Uncaught handler: thread Thread-8 exiting due to uncaught exception
  05-20 18:05:02.237: ERROR/AndroidRuntime(2777): java.lang.StackOverflowError
  05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.nio.HeapByteBuffer.<init>(HeapByteBuffer.java:49)
  05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.nio.HeapByteBuffer.<init>(HeapByteBuffer.java:45)
  05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.nio.ReadWriteHeapByteBuffer.<init>(ReadWriteHeapByteBuffer.java:49)
  05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.nio.BufferFactory.newByteBuffer(BufferFactory.java:51)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.nio.ByteBuffer.allocate(ByteBuffer.java:54)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.nio.charset.CharsetEncoder.encode(CharsetEncoder.java:351)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.nio.charset.Charset.encode(Charset.java:711)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.lang.String.getBytes(String.java:1022)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at org.apache.harmony.luni.util.Util.getBytes(Util.java:61)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.io.File.properPath(File.java:1362)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.io.FileInputStream.<init>(FileInputStream.java:77)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.io.FileInputStream.<init>(FileInputStream.java:130)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at beatit.beatit.main2.run(main2.java:40)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.lang.Thread.run(Thread.java:1096)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at  beatit.beatit.main2.run(main2.java:41)
 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.lang.Thread.run(Thread.java:1096)

 05-20 18:05:02.237: ERROR/AndroidRuntime(2777):     at java.la
 05-20 18:05:05.573: ERROR/JavaBinder(1276): !!! FAILED BINDER TRANSACTION !!!

Answer 1

你的线程一遍又一遍地调用run方法，导致stackoverflow:

currentThread.run();

没有条件可以阻止它。 (为了清楚起见，currentThread.start() 在某个阶段调用了 run 方法)