学步园

android可以识别用户的手势（即用户用手指滑动的方向），通过用户不同的手势，从而做出不同的处理

需要使用OnGestureListener

比如说看电子书的时候翻页，或者要滑动一些其他内容

直接上代码

界面文件

main.xml

<?xml version="1.0" encoding="utf-8"?><br /> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"<br /> android:orientation="vertical"<br /> android:layout_width="fill_parent"<br /> android:layout_height="fill_parent"<br /> android:id="@+id/ll"<br /> ><br /> <TextView </p> <p> android:layout_width="fill_parent"<br /> android:layout_height="wrap_content"<br /> android:text="@string/hello"<br /> /><br /> </LinearLayout><br />  

主Activity

package zy.lucifer.testGesture;<br /> import android.app.Activity;<br /> import android.os.Bundle;<br /> import android.util.Log;<br /> import android.view.GestureDetector;<br /> import android.view.MotionEvent;<br /> import android.view.View;<br /> import android.view.GestureDetector.OnGestureListener;<br /> import android.view.View.OnTouchListener;<br /> import android.widget.LinearLayout;<br /> import android.widget.TextView;<br /> import android.widget.Toast;<br /> public class testGesture extends Activity implements OnTouchListener,<br /> OnGestureListener {<br /> GestureDetector mGestureDetector;<br /> private static final int FLING_MIN_DISTANCE = 50;<br /> private static final int FLING_MIN_VELOCITY = 0;<br /> /** Called when the activity is first created. */<br /> @Override<br /> public void onCreate(Bundle savedInstanceState) {<br /> super.onCreate(savedInstanceState);<br /> setContentView(R.layout.main);<br /> mGestureDetector = new GestureDetector(this);<br /> LinearLayout ll=(LinearLayout)findViewById(R.id.ll);<br /> ll.setOnTouchListener(this);<br /> ll.setLongClickable(true);<br /> }<br /> @Override<br /> public boolean onTouch(View v, MotionEvent event) {<br /> // TODO Auto-generated method stub<br /> Log.i("touch","touch");<br /> return mGestureDetector.onTouchEvent(event);<br /> }<br /> @Override<br /> public boolean onDown(MotionEvent e) {<br /> // TODO Auto-generated method stub<br /> return false;<br /> }<br /> @Override<br /> public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,<br /> float velocityY) {<br /> // TODO Auto-generated method stub<br /> if (e1.getX()-e2.getX() > FLING_MIN_DISTANCE<br /> && Math.abs(velocityX) > FLING_MIN_VELOCITY) {<br /> // Fling left<br /> Toast.makeText(this, "向左手势", Toast.LENGTH_SHORT).show();<br /> } else if (e2.getX()-e1.getX() > FLING_MIN_DISTANCE<br /> && Math.abs(velocityX) > FLING_MIN_VELOCITY) {<br /> // Fling right<br /> Toast.makeText(this, "向右手势", Toast.LENGTH_SHORT).show();<br /> }<br /> return false;<br /> }<br /> @Override<br /> public void onLongPress(MotionEvent e) {<br /> // TODO Auto-generated method stub<br /> }<br /> @Override<br /> public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,<br /> float distanceY) {<br /> // TODO Auto-generated method stub<br /> return false;<br /> }<br /> @Override<br /> public void onShowPress(MotionEvent e) {<br /> // TODO Auto-generated method stub<br /> }<br /> @Override<br /> public boolean onSingleTapUp(MotionEvent e) {<br /> // TODO Auto-generated method stub<br /> return false;<br /> }<br /> }