Android 用手势切换activity
package rw.gest;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.GestureDetector.OnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.widget.LinearLayout;
import android.widget.Toast;
public class Gest01Activity extends Activity{
GestureDetector detector;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
detector=new GestureDetector(new GestureListener());
LinearLayout layout=(LinearLayout)findViewById(R.id.linearlayout);
layout.setOnTouchListener(new TouhListener());
layout.setLongClickable(true);
}
//触摸屏幕监听
class TouhListener implements OnTouchListener{
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), "----?", event.getAction()).show();
return detector.onTouchEvent(event);
}
}
//手势滑动监听
class GestureListener implements OnGestureListener{
@Override
public boolean onDown(MotionEvent e) {
// TODO Auto-generated method stub
/*
* 当触摸屏幕是使用这个函数
*/
Toast.makeText(getApplicationContext(), "-----------> onDown", Toast.LENGTH_LONG).show();
return false;
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
float velocityY) {
// e1 触摸的起始位置,e2 触摸的结束位置,velocityX X轴每一秒移动的像素速度(大概这个意思) velocityY 就是Y咯
//手势左,上为正 ——,右,下为负正
if (e2.getX()-e1.getX()>50) {
//为什么是50? 这个根据你的模拟器大小来定,看看模拟器宽度,e2.getX()-e1.getX()<屏幕宽度就OK
Toast.makeText(getApplicationContext(), "向右滑动", Toast.LENGTH_LONG).show();
//要触发什么事件都在这里写就OK
//如果要跳转到另外一个activity
Intent intent=new Intent(Gest01Activity.this, toActivity.class);
startActivity(intent);
}
if (Math.abs(e2.getX()-e1.getX())>50) {
Toast.makeText(getApplicationContext(), "向左滑动", Toast.LENGTH_LONG).show();
}
if (Math.abs(e2.getY()-e1.getY())>50) {
Toast.makeText(getApplicationContext(), "向上滑动", Toast.LENGTH_LONG).show();
}
if (e2.getY()-e1.getY()>50) {
Toast.makeText(getApplicationContext(), "向下滑动", Toast.LENGTH_LONG).show();
}
return false;
}
@Override
public void onLongPress(MotionEvent e) {
// TODO Auto-generated method stub\
/*
* 长按事件 一切长事件按屏幕想要触发的事件都在这里写
*/
Toast.makeText(getApplicationContext(), "------------> onLongPress", Toast.LENGTH_LONG).show();
}
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2,
float distanceX, float distanceY) {
// TODO Auto-generated method stub
/*
* 这个函数大概是这样,英语差了,有误差。distanceX 是X轴路径长度,distanceY 是Y轴路径长度(注意:是路径,不是位移);
*/
Toast.makeText(getApplicationContext(), "------------> onScroll", Toast.LENGTH_LONG).show();
return false;
}
@Override
public void onShowPress(MotionEvent e) {
// TODO Auto-generated method stub
/*
*
*/
Toast.makeText(getApplicationContext(), "------------> onShowPress", Toast.LENGTH_LONG).show();
}
@Override
public boolean onSingleTapUp(MotionEvent e) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), "------------> onSingleTapUp", Toast.LENGTH_LONG).show();
return false;
}
}
}
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/linearlayout" > <ImageView android:src="@drawable/eight" android:id="@+id/imageView1" android:layout_height="match_parent" android:layout_width="match_parent"></ImageView> </LinearLayout>
先上代码再看图,解释在代码中.............