Android(安卓)GestureDetector手势识别类

为了加强鼠标响应事件，Android提供了GestureDetector手势识别类。通过 GestureDetector.OnGestureListener 来获取当前被触发的操作手势（Single Tap Up、Show Press、Long Press、Scroll、Down、Fling），具体包括以下几种：

boolean onDoubleTap(MotionEvent e)
解释：双击的第二下Touch down时触发
boolean onDoubleTapEvent(MotionEvent e)
解释：双击的第二下Touch down和up都会触发，可用e.getAction()区分。
boolean onDown(MotionEvent e)
解释：Touch down时触发
boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY)
解释：Touch了滑动一点距离后，up时触发。
void onLongPress(MotionEvent e)
解释：Touch了不移动一直Touch down时触发
boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY)
解释：Touch了滑动时触发。
void onShowPress(MotionEvent e)
解释：Touch了还没有滑动时触发
（与onDown，onLongPress比较
onDown只要Touch down一定立刻触发。
而Touchdown后过一会没有滑动先触发onShowPress再是onLongPress。
所以Touchdown后一直不滑动，onDown->onShowPress->onLongPress这个顺序触发。

boolean onSingleTapConfirmed(MotionEvent e)
boolean onSingleTapUp(MotionEvent e)
解释：上面这两个函数都是在touch down后又没有滑动（onScroll），又没有长按（onLongPress），然后Touchup时触发。

点击一下非常快的（不滑动）Touchup：
onDown->onSingleTapUp->onSingleTapConfirmed
点击一下稍微慢点的（不滑动）Touchup：
onDown->onShowPress->onSingleTapUp->onSingleTapConfirmed

使用GestureDetector需要在View中重写onTouchEvent事件，例如：

[java] view plain copy

GestureDetector mGesture = null;
@Override
public boolean onTouch(View v, MotionEvent event)
{
// TODO Auto-generated method stub
return mGesture.onTouchEvent(event);
}

详细的测试例子如下：

[cpp] view plain copy

package com.jiubang.android.gesturetest;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
import android.view.GestureDetector.SimpleOnGestureListener;
import android.view.View.OnTouchListener;
import android.widget.Button;
public class GestureActivity extends Activity
implements OnTouchListener
{
private Button mButton = null;
GestureDetector mGesture = null;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Log.i("TEST", "onCreate");
mButton = (Button)findViewById(R.id.button1);
mButton.setOnTouchListener(this);
mGesture = new GestureDetector(this, new GestureListener());
}
@Override
public boolean onTouch(View v, MotionEvent event)
{
// TODO Auto-generated method stub
return mGesture.onTouchEvent(event);
}
class GestureListener extends SimpleOnGestureListener
{
@Override
public boolean onDoubleTap(MotionEvent e)
{
// TODO Auto-generated method stub
Log.i("TEST", "onDoubleTap");
return super.onDoubleTap(e);
}
@Override
public boolean onDown(MotionEvent e)
{
// TODO Auto-generated method stub
Log.i("TEST", "onDown");
return super.onDown(e);
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY)
{
// TODO Auto-generated method stub
Log.i("TEST", "onFling:velocityX = " + velocityX + " velocityY" + velocityY);
return super.onFling(e1, e2, velocityX, velocityY);
}
@Override
public void onLongPress(MotionEvent e)
{
// TODO Auto-generated method stub
Log.i("TEST", "onLongPress");
super.onLongPress(e);
}
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2,
float distanceX, float distanceY)
{
// TODO Auto-generated method stub
Log.i("TEST", "onScroll:distanceX = " + distanceX + " distanceY = " + distanceY);
return super.onScroll(e1, e2, distanceX, distanceY);
}
@Override
public boolean onSingleTapUp(MotionEvent e)
{
// TODO Auto-generated method stub
Log.i("TEST", "onSingleTapUp");
return super.onSingleTapUp(e);
}
}
}

//以上部分内容选自网络

视屏播放界面的手势控制界面：

package com.azhibo.zhibo.view;import java.util.HashMap;import java.util.Map;import io.vov.vitamio.LibsChecker;import io.vov.vitamio.MediaPlayer;import io.vov.vitamio.MediaPlayer.OnCompletionListener;import io.vov.vitamio.MediaPlayer.OnErrorListener;import io.vov.vitamio.MediaPlayer.OnPreparedListener;import io.vov.vitamio.widget.MediaController;import io.vov.vitamio.widget.VideoIntefaceClick;import io.vov.vitamio.widget.VideoUtils;import io.vov.vitamio.widget.VideoView;import android.app.Activity;import android.content.Context;import android.content.res.Configuration;import android.media.AudioManager;import android.net.Uri;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.util.Log;import android.view.Display;import android.view.GestureDetector;import android.view.MotionEvent;import android.view.View;import android.view.ViewGroup;import android.view.Window;import android.view.WindowManager;import android.view.GestureDetector.SimpleOnGestureListener;import android.widget.ImageButton;import android.widget.ImageView;import android.widget.ProgressBar;import android.widget.Toast;import com.apple.down.assit.DownLoadInfo;import com.azhibo.zhibo.R;import com.umeng.analytics.MobclickAgent;public class VideoViewActivity extends Activity {private static int n=0;//private String path = "";private VideoView mVideoView;public VideoIntefaceClick listItemCall;private Uri pathUri;private ProgressBar probar;private String type=null;private int mLayout = VideoView.VIDEO_LAYOUT_SCALE;private View mVolumeBrightnessLayout;private ImageView mOperationBg;private ImageView mOperationPercent;private AudioManager mAudioManager;/** 最大声音 */private int mMaxVolume;/** 当前声音 */private int mVolume = -1;/** 当前亮度 */private float mBrightness = -1f;private GestureDetector mGestureDetector;private String path="";private String title="";private DownLoadInfo info=null;//xulongheng 播放界面的视频监听事件private class ListItemViewListener implements VideoIntefaceClick {@Overridepublic void onExitVideo() {if(type!=null&&type.equals("1")){Toast.makeText(VideoViewActivity.this, "请耐心等待视频下载完毕!", Toast.LENGTH_SHORT).show();}else{Toast.makeText(VideoViewActivity.this, "本直播源需要休息一下，换一个试试吧!", Toast.LENGTH_SHORT).show();}Log.v("xulongheng*VideoViewActivity*onExitVideo:", "--->onExitVideo "+type);VideoViewActivity.this.finish();}@Overridepublic void onCheckVagueVide(int statue, String url) {// TODO Auto-generated method stubLog.v("xulongheng*VideoViewActivity*onCheckVagueVide:", "--->onCheckVagueVide statue"+statue);Message msg=new Message();msg.obj=url;msg.what=statue;mHandler.sendMessage(msg);}}@Overridepublic void onCreate(Bundle icicle) {this.requestWindowFeature(Window.FEATURE_NO_TITLE);this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);super.onCreate(icicle);if (!LibsChecker.checkVitamioLibs(this, getClass().getName(), R.string.init_decoders, R.raw.libarm)){return;}setContentView(R.layout.videoview);mVideoView = (VideoView) findViewById(R.id.surface_view);probar=(ProgressBar) findViewById(R.id.probar);mVolumeBrightnessLayout = findViewById(R.id.operation_volume_brightness);mOperationBg = (ImageView) findViewById(R.id.operation_bg);mOperationPercent = (ImageView) findViewById(R.id.operation_percent);mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);mMaxVolume = mAudioManager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);listItemCall = new ListItemViewListener();mVideoView.setVideoIntefaceClick(listItemCall);ImageButton showLeft=(ImageButton) findViewById(R.id.showLeft);path=this.getIntent().getStringExtra("url");title=getIntent().getStringExtra("title");//info=(DownLoadInfo) getIntent().getSerializableExtra("info");//path="http://218.26.231.201/youku/69722EE89093676C988636194/030020010052A91FBF7A9A036E0AF8E178E089-4698-FC9B-45D5-E65EA8462AF1.mp4";Log.v("xulongheng*VideoView*uri***", ":"+path);pathUri = Uri.parse(path);type=this.getIntent().getStringExtra("type");if(type!=null&&type.equals("1")){probar.setVisibility(View.GONE);StringBuilder builder=new StringBuilder();for(int i=0;ipathpath"+pathUri);videoUtls.setVideoIntefaceClick(listItemCall);videoUtls.doWith(pathUri.toString());}else{probar.setVisibility(View.GONE);mVideoView.setVideoURI(pathUri,this,this.getString(R.string.app_name),this.getString(R.string.load_now));}}mVideoView.start();//xlh_add 添加播放器监听initVideoListen();mGestureDetector = new GestureDetector(this, new MyGestureListener());}public void initVideoListen(){mVideoView.setVideoQuality(MediaPlayer.VIDEOQUALITY_HIGH);mVideoView.setOnPreparedListener(new OnPreparedListener() {@Overridepublic void onPrepared(MediaPlayer mp) {mVideoView.setSubShown(true);Log.v("xulongheng*VideoActivity*播放器播放准备监听：", "onPrepared");}});mVideoView.setOnCompletionListener(new OnCompletionListener() {@Overridepublic void onCompletion(MediaPlayer arg0) {n++;Toast.makeText(VideoViewActivity.this, "播放即将结束!", Toast.LENGTH_SHORT).show();VideoViewActivity.this.finish();Log.v("xulongheng*VideoActivity*播放器播放完成监听：", "onCompletion"+n);}});mVideoView.setOnErrorListener(new OnErrorListener() {@Overridepublic boolean onError(MediaPlayer arg0, int arg1, int arg2) {//播放源错误统计分析 未完成Map source = new HashMap();source.put("url", path);if(title!=null&&!title.equals(""))source.put("title", title);MobclickAgent.onEvent(VideoViewActivity.this, "ErrorSource",source);Toast.makeText(VideoViewActivity.this, "本视频无法播放", Toast.LENGTH_SHORT).show();VideoViewActivity.this.finish();Log.v("xulongheng*VideoActivity*播放器播放错误监听：", "onError:"+arg1+"/"+arg2);return false;}});mVideoView.setMediaController(new MediaController(this));}@Overridepublic void onConfigurationChanged(Configuration newConfig) {if (mVideoView != null){mVideoView.setVideoLayout(mLayout, 0);}super.onConfigurationChanged(newConfig);}public Handler mHandler = new Handler() {@SuppressWarnings("unchecked")public void handleMessage(Message msg) {probar.setVisibility(View.GONE);switch(msg.what){case 0:mVideoView.setVideoURI(Uri.parse(msg.obj.toString()),VideoViewActivity.this,VideoViewActivity.this.getString(R.string.app_name),VideoViewActivity.this.getString(R.string.load_now));break;case 1:mVideoView.setVideoURI(Uri.parse(msg.obj.toString()),VideoViewActivity.this,VideoViewActivity.this.getString(R.string.app_name),VideoViewActivity.this.getString(R.string.load_now));break;}}};@Overridepublic boolean onTouchEvent(MotionEvent event) {if (mGestureDetector.onTouchEvent(event))return true;// 处理手势结束 多点触控之MotionEvent.ACTION_MASK作用switch (event.getAction() & MotionEvent.ACTION_MASK) {case MotionEvent.ACTION_UP:endGesture();break;}return super.onTouchEvent(event);}/** 手势结束 */private void endGesture() {mVolume = -1;mBrightness = -1f;// 隐藏mDismissHandler.removeMessages(0);mDismissHandler.sendEmptyMessageDelayed(0, 500);}//xulongheng 触屏横向调音量private class MyGestureListener extends SimpleOnGestureListener {/** 双击 */@Overridepublic boolean onDoubleTap(MotionEvent e) {if (mLayout == VideoView.VIDEO_LAYOUT_SCALE)mLayout = VideoView.VIDEO_LAYOUT_ZOOM;elsemLayout = VideoView.VIDEO_LAYOUT_SCALE;Log.d("Scale = ", Integer.toString(mLayout));if (mVideoView != null){mVideoView.setVideoLayout(mLayout, 0);}return true;}/** 左右两边滑动调节音量两度 */@Overridepublic boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {float mOldX = e1.getX(), mOldY = e1.getY();int y = (int) e2.getRawY();Display disp = getWindowManager().getDefaultDisplay();int windowWidth = disp.getWidth();int windowHeight = disp.getHeight();if (mOldX > windowWidth * 4.0 / 5)// 右边滑动onVolumeSlide((mOldY - y) / windowHeight);else if (mOldX < windowWidth / 5.0)// 左边滑动onBrightnessSlide((mOldY - y) / windowHeight);return super.onScroll(e1, e2, distanceX, distanceY);}}/** xulongheng定时隐藏 */private Handler mDismissHandler = new Handler() {@Overridepublic void handleMessage(Message msg) {mVolumeBrightnessLayout.setVisibility(View.GONE);}};/** * 滑动改变声音大小 *  * @param percent */private void onVolumeSlide(float percent) {if (mVolume == -1) {mVolume = mAudioManager.getStreamVolume(AudioManager.STREAM_MUSIC);if (mVolume < 0)mVolume = 0;// 显示mOperationBg.setImageResource(R.drawable.video_volumn_bg);mVolumeBrightnessLayout.setVisibility(View.VISIBLE);}int index = (int) (percent * mMaxVolume) + mVolume;if (index > mMaxVolume)index = mMaxVolume;else if (index < 0)index = 0;// 变更声音mAudioManager.setStreamVolume(AudioManager.STREAM_MUSIC, index, 0);// 变更进度条ViewGroup.LayoutParams lp = mOperationPercent.getLayoutParams();lp.width = findViewById(R.id.operation_full).getLayoutParams().width * index / mMaxVolume;mOperationPercent.setLayoutParams(lp);}/** * xulongheng 滑动改变亮度 *  * @param percent */private void onBrightnessSlide(float percent) {if (mBrightness < 0) {mBrightness = getWindow().getAttributes().screenBrightness;if (mBrightness <= 0.00f)mBrightness = 0.50f;if (mBrightness < 0.01f)mBrightness = 0.01f;// 显示mOperationBg.setImageResource(R.drawable.video_brightness_bg);mVolumeBrightnessLayout.setVisibility(View.VISIBLE);}WindowManager.LayoutParams lpa = getWindow().getAttributes();lpa.screenBrightness = mBrightness + percent;if (lpa.screenBrightness > 1.0f)lpa.screenBrightness = 1.0f;else if (lpa.screenBrightness < 0.01f)lpa.screenBrightness = 0.01f;getWindow().setAttributes(lpa);ViewGroup.LayoutParams lp = mOperationPercent.getLayoutParams();lp.width = (int) (findViewById(R.id.operation_full).getLayoutParams().width * lpa.screenBrightness);mOperationPercent.setLayoutParams(lp);}}

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