模仿微信的按住录音功能

          come from :按住录音功能

           Android仿微信录音功能，自定义控件的设计技巧  http://blog.csdn.net/kymjs/article/details/41903565

    将功能封装到view中，降低耦合度，需要的地方直接引入view就可以

     我把整个逻辑封装到一个Button里了，可以直接使用这个Button，当按住时会开始录音，当手指移到Button外时取消录音，该Button还向外暴露了一个Finish接口，录音完成时调用这个接口，具体使用方法看代码吧。

代码：

    package demo.com;

    import java.io.File;
    import java.io.IOException;

    import android.app.Dialog;
    import android.content.Context;
    import android.content.DialogInterface;
    import android.content.DialogInterface.OnDismissListener;
    import android.media.MediaRecorder;
    import android.os.Handler;
    import android.os.Message;
    import android.util.AttributeSet;
    import android.view.Gravity;
    import android.view.MotionEvent;
    import android.view.ViewGroup;
    import android.view.WindowManager.LayoutParams;
    import android.widget.Button;
    import android.widget.ImageView;
    import android.widget.Toast;

    public class RecordButton extends Button {

         public RecordButton(Context context) {
             super(context);
             init();
         }

         public RecordButton(Context context, AttributeSet attrs, int defStyle) {
             super(context, attrs, defStyle);
             init();
         }

         public RecordButton(Context context, AttributeSet attrs) {
             super(context, attrs);
             init();
         }

         public void setSavePath(String path) {
             mFileName = path;
         }

         public void setOnFinishedRecordListener(OnFinishedRecordListener listener) {
             finishedListener = listener;
         }

         private String mFileName = null;

         private OnFinishedRecordListener finishedListener;

         private static final int MIN_INTERVAL_TIME = 2000;// 2s
         private long startTime;

         private Dialog recordIndicator;

         private static int[] res = { R.drawable.mic_2, R.drawable.mic_3,
                 R.drawable.mic_4, R.drawable.mic_5 };

         private static ImageView view;

         private MediaRecorder recorder;

         private ObtainDecibelThread thread;

         private Handler volumeHandler;

         private void init() {
             volumeHandler = new ShowVolumeHandler();
         }

         @Override
         public boolean onTouchEvent(MotionEvent event) {

             if (mFileName == null)
                 return false;

             int action = event.getAction();

             switch (action) {
             case MotionEvent.ACTION_DOWN:
                 initDialogAndStartRecord();
                 break;
             case MotionEvent.ACTION_UP:
                 finishRecord();
                 break;
             case MotionEvent.ACTION_CANCEL:// 当手指移动到view外面，会cancel
                 cancelRecord();
                 break;
             }

             return true;
         }

         private void initDialogAndStartRecord() {

             startTime = System.currentTimeMillis();
             recordIndicator = new Dialog(getContext(),
                     R.style.like_toast_dialog_style);
             view = new ImageView(getContext());
             view.setImageResource(R.drawable.mic_2);
             recordIndicator.setContentView(view, new LayoutParams(
                     ViewGroup.LayoutParams.MATCH_PARENT,
                     ViewGroup.LayoutParams.MATCH_PARENT));
             recordIndicator.setOnDismissListener(onDismiss);
             LayoutParams lp = recordIndicator.getWindow().getAttributes();
             lp.gravity = Gravity.CENTER;

             startRecording();
             recordIndicator.show();
         }

         private void finishRecord() {
             stopRecording();
             recordIndicator.dismiss();

             long intervalTime = System.currentTimeMillis() - startTime;
             if (intervalTime < MIN_INTERVAL_TIME) {
                 Toast.makeText(getContext(), "时间太短！", Toast.LENGTH_SHORT).show();
                 File file = new File(mFileName);
                 file.delete();
                 return;
             }

             if (finishedListener != null)
                 finishedListener.onFinishedRecord(mFileName);
         }

         private void cancelRecord() {
             stopRecording();
             recordIndicator.dismiss();

             Toast.makeText(getContext(), "取消录音！", Toast.LENGTH_SHORT).show();
             File file = new File(mFileName);
             file.delete();
         }

         private void startRecording() {
             recorder = new MediaRecorder();
             recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
             recorder.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR);
             recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
             recorder.setOutputFile(mFileName);

             try {
                 recorder.prepare();
             } catch (IOException e) {
                 e.printStackTrace();
             }

             recorder.start();
             thread = new ObtainDecibelThread();
             thread.start();

         }

         private void stopRecording() {
             if (thread != null) {
                 thread.exit();
                 thread = null;
             }
             if (recorder != null) {
                 recorder.stop();
                 recorder.release();
                 recorder = null;
             }
         }

         private class ObtainDecibelThread extends Thread {

             private volatile boolean running = true;

             public void exit() {
                 running = false;
             }

             @Override
             public void run() {
                 while (running) {
                     try {
                         Thread.sleep(200);
                     } catch (InterruptedException e) {
                         e.printStackTrace();
                     }
                     if (recorder == null || !running) {
                         break;
                     }
                     int x = recorder.getMaxAmplitude();
                     if (x != 0) {
                         int f = (int) (10 * Math.log(x) / Math.log(10));
                         if (f < 26)
                             volumeHandler.sendEmptyMessage(0);
                         else if (f < 32)
                             volumeHandler.sendEmptyMessage(1);
                         else if (f < 38)
                             volumeHandler.sendEmptyMessage(2);
                         else
                             volumeHandler.sendEmptyMessage(3);

                     }

                 }
             }

         }

         private OnDismissListener onDismiss = new OnDismissListener() {

             @Override
             public void onDismiss(DialogInterface dialog) {
                 stopRecording();
             }
         };

         static class ShowVolumeHandler extends Handler {
             @Override
             public void handleMessage(Message msg) {
                 view.setImageResource(res[msg.what]);
             }
         }

         public interface OnFinishedRecordListener {
             public void onFinishedRecord(String audioPath);
         }

    }

效果图：

 

源码下载：

   andoid按住录音功能http://download.csdn.net/detail/xiaobijia/9423718