在单个按钮上点击多个功能

Question

我有一个按钮，我想为它的三个功能 首先点击它开始录制声音。第二次点击它会停止第三次点击它显示三个选项（播放声音，录制新的删除声音）我怎样才能实现这个动作 帮助

k=(Button)findViewById(R.id.button1); 
    k.setOnClickListener(new OnClickListener() { 

     @Override 
     public void onClick(View v) { 
      // TODO Auto-generated method stub 

     } 
    }); 

Answer 1

您需要设置一个类级别的变量，并确定已蒸发了什么点击。这种方法的难点在于定义何时重置该值。

private int _clicks = 0; 

k = (Button)findViewById(R.id.button1); 
k.setOnClickListener(new OnClickListener() { 

    @Override 
    public void onClick(View v) { 
     int count = ++_clicks; 

     if(count == 1) 
      //do whatever 
     if(count == 2) 
      //do whatever 
     if(count == 3) 
      //do whatever 
    } 
}); 

更好的方法是简单地将多个处理程序分配给多个按钮并执行该按钮所需的操作。这将允许您定义1：1关系，并使您的代码更易于管理。

编辑：录制声音有plenty of examples在网络上。

public class AudioRecorder { 

    final MediaRecorder recorder = new MediaRecorder(); 
    final String path; 

    /** 
    * Creates a new audio recording at the given path (relative to root of SD card). 
    */ 
    public AudioRecorder(String path) { 
    this.path = sanitizePath(path); 
    } 

    private String sanitizePath(String path) { 
    if (!path.startsWith("/")) { 
     path = "/" + path; 
    } 
    if (!path.contains(".")) { 
     path += ".3gp"; 
    } 
    return Environment.getExternalStorageDirectory().getAbsolutePath() + path; 
    } 

    /** 
    * Starts a new recording. 
    */ 
    public void start() throws IOException { 
    String state = android.os.Environment.getExternalStorageState(); 
    if(!state.equals(android.os.Environment.MEDIA_MOUNTED)) { 
     throw new IOException("SD Card is not mounted. It is " + state + "."); 
    } 

    // make sure the directory we plan to store the recording in exists 
    File directory = new File(path).getParentFile(); 
    if (!directory.exists() && !directory.mkdirs()) { 
     throw new IOException("Path to file could not be created."); 
    } 

    recorder.setAudioSource(MediaRecorder.AudioSource.MIC); 
    recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); 
    recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); 
    recorder.setOutputFile(path); 
    recorder.prepare(); 
    recorder.start(); 
    } 

    /** 
    * Stops a recording that has been previously started. 
    */ 
    public void stop() throws IOException { 
    recorder.stop(); 
    recorder.release(); 
    } 

} 

Answer 2

另一种方法是有三个不同的onClickListeners。看看下面的代码：

在您的onCreate：

... 
button.setOnClickListener(playListener); 
... 

创建方法play()，stop()，并在活动showOption()的任何地方，而这一点：

OnClickListener playListener = new OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      play(); 
      v.setOnClickListener(stopListener); 
     } 
    }; 

    OnClickListener stopListener = new OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      stop(); 
      v.setOnClickListener(showOptionListener); 
     } 
    }; 

    OnClickListener showOptionListener = new OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      showOption(); 
     } 
    };