android之OnGestureListener实现图片的左右滑动

先来看看效果图吧



welcome_glide.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="match_parent"
  android:layout_height="match_parent">
 	
 <ViewFlipper android:id="@+id/viewflipper" 
 			  android:layout_width="fill_parent" 
 			  android:layout_height="fill_parent"/>
  
</LinearLayout>

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.GestureDetector;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.view.GestureDetector.OnGestureListener;
import android.view.animation.AnimationUtils;
import android.widget.ImageView;
import android.widget.ViewFlipper;
import static android.view.KeyEvent.KEYCODE_BACK;  

public class WelcomeGlide extends Activity implements OnGestureListener{
	private static final String TAG = "Fuchangle.AggHelp";
	private int mScreenWidth ;
	private int mScreenHeight ;
	private GestureDetector detector;
	private ViewFlipper flipper;
	private int mIndexHelpPic = 0;
	private int[] mBgList = {
			R.drawable.guide01,
			R.drawable.guide02,
			R.drawable.guide03,
			R.drawable.guide04,
			R.drawable.guide05
	};
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
		
		setContentView(R.layout.welcome_glide);
	
		DisplayMetrics dm =  new DisplayMetrics();
		getWindowManager().getDefaultDisplay().getMetrics(dm);
		mScreenWidth = dm.widthPixels;
		mScreenHeight = dm.heightPixels;
		if(mScreenWidth <240){
			mScreenWidth = 240;
		}
		
		if(mScreenHeight < 320){
			mScreenHeight = 320;
		}
		flipper = (ViewFlipper)this.findViewById(R.id.viewflipper);
		flipper.addView(addImageByID(mBgList[mIndexHelpPic]), new ViewGroup.LayoutParams
				(ViewGroup.LayoutParams.FILL_PARENT,ViewGroup.LayoutParams.FILL_PARENT));
		detector = new GestureDetector(this);
	}
	
	@Override
	public boolean onDown(MotionEvent e) {
		return false;
	}

	@Override
	public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
			float velocityY) {
		if(e1.getX()-e2.getX() > 120){
			if(++mIndexHelpPic >= mBgList.length){
				mIndexHelpPic = mBgList.length - 1;
				backToMainDesk();
				return true;
			}
			
			this.flipper.setInAnimation(AnimationUtils.loadAnimation(this,R.anim.push_left_in));
			this.flipper.setOutAnimation(AnimationUtils.loadAnimation(this, R.anim.push_left_out));
			
			flipper.addView(addImageByID(mBgList[mIndexHelpPic]),new ViewGroup.LayoutParams(
					ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT));
			this.flipper.showNext();
		}else if(e1.getX() - e2.getX()< -120){
			if(--mIndexHelpPic < 0){
				mIndexHelpPic = 0;
				return true;
			}
			
			this.flipper.setInAnimation(AnimationUtils.loadAnimation(this, R.anim.push_right_in));
			this.flipper.setOutAnimation(AnimationUtils.loadAnimation(this, R.anim.push_right_out));
			this.flipper.showPrevious();
			return true;
		}
		return true;
	}
	
	private void backToMainDesk(){
		startActivity(new Intent(this,QQActivity.class));
		finish();
	}
	
	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {  
	       switch (keyCode) {  
	          case KEYCODE_BACK:  
	             backToMainDesk();  
             return true;  
	         default:  
	             break;  
	       }  
	       return super.onKeyDown(keyCode, event);  
	   }  

	
	private View addImageByID(int id){
		ImageView img = new ImageView(this);
		img.setImageResource(id);
		img.setAdjustViewBounds(true);
		img.setMaxWidth(mScreenWidth);
		img.setMaxHeight(mScreenHeight);
		img.setScaleType(ImageView.ScaleType.FIT_XY);
		return img;
	}
	
	@Override
	public boolean onTouchEvent(MotionEvent event) {
		Log.i("Fling",  "Activity onTouchEvent!");
		return this.detector.onTouchEvent(event);  
	}
	
	@Override
	public void onLongPress(MotionEvent e) {
	}

	@Override
	public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,float distanceY) {
		return false;
	}

	@Override
	public void onShowPress(MotionEvent e) {
	}

	@Override
	public boolean onSingleTapUp(MotionEvent e) {
		return false;
	}
	
}

下面的文件放在res/anim里面
push_left_in.xml

<?xml version="1.0" encoding="utf-8"?>
<set  xmlns:android="http://schemas.android.com/apk/res/android">>
    <translate android:fromXDelta="100%p" android:toXDelta="0"
    android:duration="500"/>
    <alpha android:fromAlpha="1.0" android:toAlpha="1.0"
    android:duration="500"/>
</set>

push_left_out.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
      <translate android:fromXDelta="0" android:toXDelta="-100%p"  
       android:duration="500" />  
   	 <alpha android:fromAlpha="1.0" android:toAlpha="1.0"  
        android:duration="500" />  
    
</set>

push_right_in.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
	<translate android:fromXDelta="0" android:toXDelta="100%p"
		android:duration="500" />
	<alpha android:fromAlpha="1.0" android:toAlpha="1.0"
		android:duration="500" />
</set>

push_right_out.xml

<?xml version="1.0" encoding="utf-8"?>  
<set xmlns:android="http://schemas.android.com/apk/res/android">  
    <translate android:fromXDelta="-100%p" android:toXDelta="0"  
        android:duration="500" />  
    <alpha android:fromAlpha="1.0" android:toAlpha="1.0"  
        android:duration="500" />  
</set> 

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评论

2 楼 卡菲牛奶 2012-12-03  

rionyrain 写道

大哥你这个里面的KEYCODE_BACK 是自定义的还是 类中有的啊

类中就有的，返回键

1 楼 rionyrain 2012-12-02  

大哥你这个里面的KEYCODE_BACK 是自定义的还是 类中有的啊