GestureDetector简单应用

来源：互联网发布：prisma 喜好知乎滤镜编辑：程序博客网时间：2024/05/02 04:44

GestureDetector是对Touch事件的封装化处理，辅助我们队事件的行为加以区别并监听

onScroll:在屏幕上划出一段距离会触发

onFling:猛的一划会触发

要想让手势类监听到touch事件下面例子是在touch中写的

对于activity,可以复写dispatchTouchEvent方法中调用 mGestureDetector.onTouchEvent(event);

总之需要调用 mGestureDetector.onTouchEvent(event);才能实现手势类的监听效果

代码例子：

package com.test.jd.myapplication;import android.app.Activity;import android.os.Bundle;import android.util.Log;import android.view.GestureDetector;import android.view.GestureDetector.SimpleOnGestureListener;import android.view.MotionEvent;import android.view.View;import android.view.View.OnTouchListener;import android.widget.Button;public class MainActivity extends Activity {    private Button mButton;    private GestureDetector mGestureDetector;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mGestureDetector = new GestureDetector(this, new MyOnGestureListener());        mButton = (Button) findViewById(R.id.btn_textgesture);        mButton.setOnTouchListener(new OnTouchListener() {            @Override            public boolean onTouch(View v, MotionEvent event) {                Log.i(getClass().getName(), "onTouch-----" + getActionName(event.getAction()));                mGestureDetector.onTouchEvent(event);                // 一定要返回true，不然获取不到完整的事件                return true;            }        });    }    private String getActionName(int action) {        String name = "";        switch (action) {            case MotionEvent.ACTION_DOWN: {                name = "ACTION_DOWN";                break;            }            case MotionEvent.ACTION_MOVE: {                name = "ACTION_MOVE";                break;            }            case MotionEvent.ACTION_UP: {                name = "ACTION_UP";                break;            }            default:                break;        }        return name;    }    class MyOnGestureListener extends SimpleOnGestureListener {        @Override        public boolean onSingleTapUp(MotionEvent e) {            Log.i(getClass().getName(), "onSingleTapUp-----" + getActionName(e.getAction()));            return false;        }        @Override        public void onLongPress(MotionEvent e) {            Log.i(getClass().getName(), "onLongPress-----" + getActionName(e.getAction()));        }        @Override        public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {            Log.i(getClass().getName(),                    "onScroll-----" + getActionName(e2.getAction()) + ",(" + e1.getX() + "," + e1.getY() + ") ,("                            + e2.getX() + "," + e2.getY() + ")");            return false;        }        @Override        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {            Log.i(getClass().getName(),                    "onFling-----" + getActionName(e2.getAction()) + ",(" + e1.getX() + "," + e1.getY() + ") ,("                            + e2.getX() + "," + e2.getY() + ")");            return false;        }        @Override        public void onShowPress(MotionEvent e) {            Log.i(getClass().getName(), "onShowPress-----" + getActionName(e.getAction()));        }        @Override           public boolean onDown(MotionEvent e) {            Log.i(getClass().getName(), "onDown-----" + getActionName(e.getAction()));            return false;        }        @Override        public boolean onDoubleTap(MotionEvent e) {            Log.i(getClass().getName(), "onDoubleTap-----" + getActionName(e.getAction()));            return false;        }        @Override        public boolean onDoubleTapEvent(MotionEvent e) {            Log.i(getClass().getName(), "onDoubleTapEvent-----" + getActionName(e.getAction()));            return false;        }        @Override        public boolean onSingleTapConfirmed(MotionEvent e) {            Log.i(getClass().getName(), "onSingleTapConfirmed-----" + getActionName(e.getAction()));            return false;        }    }}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity" >    <Button        android:id="@+id/btn_textgesture"        android:layout_width="fill_parent"        android:layout_height="fill_parent"        android:text="@string/app_name" /></RelativeLayout>

下载利用手势类关闭当前Activity的例子:http://pan.baidu.com/s/1mgMfdVy

参考:http://www.apkbus.com/android-128069-1-1.html

0 0