利用截圖做圖片切換動畫

package com.example.shoushi;

import android.animation.ObjectAnimator;

import android.annotation.SuppressLint;

import android.app.Activity;

import android.graphics.Bitmap;

import android.graphics.Bitmap.Config;

import android.os.Bundle;

import android.util.DisplayMetrics;

import android.view.Display;

import android.view.GestureDetector;

import android.view.GestureDetector.OnGestureListener;

import android.view.MotionEvent;

import android.view.View;

import android.view.View.OnTouchListener;

import android.view.WindowManager;

import android.widget.ImageView;

import android.widget.RelativeLayout;

public class MainActivity extends Activity implements OnGestureListener,OnTouchListener{

private int verticalMinDistance = 20;  

private int minVelocity= 0;  

private Bitmap Bmp, bitmap;

//Translate動畫 - 位置移動  

private ImageView imageView,imageView2;

 private GestureDetector gestureDetector;  

    @SuppressWarnings("deprecation")

protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        imageView = (ImageView) findViewById(R.id.imageView1);

        imageView2 = (ImageView) findViewById(R.id.imageView2);

        gestureDetector = new GestureDetector(MainActivity.this);  

        RelativeLayout viewSnsLayout = (RelativeLayout)findViewById(R.id.buju); 

        viewSnsLayout.setOnTouchListener(this);    

        viewSnsLayout.setLongClickable(true);  

    }

@Override

public boolean onDown(MotionEvent e) {

// TODO Auto-generated method stub

return false;

}

@SuppressLint("NewApi") @Override

public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,

float velocityY) {

//左滑

if (e1.getX() - e2.getX() > verticalMinDistance  && Math.abs(velocityX) > minVelocity){

//******************

//獲得屏幕寬度

//******************

DisplayMetrics metric = new DisplayMetrics();

getWindowManager().getDefaultDisplay().getMetrics(metric);

int Pwidth = metric.widthPixels;

//******************

//獲得控件寬高

//******************

int w = View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED); 

int h = View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED); 

imageView2.measure(w, h); 

 int height =imageView2.getMeasuredHeight(); 

 int width =imageView2.getMeasuredWidth(); 

//******************

//獲得控件在屏幕中的座標

//******************

 int[] location = new int[2];  

                imageView.getLocationOnScreen(location);  

                int x = location[0];  

                int y = location[1];  

                System.out.println(x+"   "+y);

             //******************

     //截圖方法

     //******************

GetandSaveCurrentImage();

bitmap = Bitmap.createBitmap(Bmp, x, y, width, height);

imageView2.setImageBitmap(bitmap);

imageView2.setVisibility(View.VISIBLE);

//******************

//移動的動畫

//******************

ObjectAnimator.ofFloat(imageView2, "translationX", Pwidth-2*width,-(y+Pwidth)).setDuration(500).start();

     

        

//.startActivity(new Intent(MainActivity.this,zuo.class));

}else if(e2.getX() - e1.getX() > verticalMinDistance  && Math.abs(velocityX) > minVelocity){

DisplayMetrics metric = new DisplayMetrics();

getWindowManager().getDefaultDisplay().getMetrics(metric);

int Pwidth = metric.widthPixels; // 屏幕寬度（像素）

int w = View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED); 

int h = View.MeasureSpec.makeMeasureSpec(0,View.MeasureSpec.UNSPECIFIED); 

imageView2.measure(w, h); 

 int height =imageView2.getMeasuredHeight(); 

 int width =imageView2.getMeasuredWidth(); 

 int[] location = new int[2];  

                imageView.getLocationOnScreen(location);  

                int x = location[0];  

                int y = location[1];  

GetandSaveCurrentImage();

bitmap = Bitmap.createBitmap(Bmp, x, y, width, height);

imageView2.setImageBitmap(bitmap);

imageView2.setVisibility(View.VISIBLE);

//向右移動時 屏寬-2倍的圖寬

ObjectAnimator.ofFloat(imageView2, "translationX", 

Pwidth-2*width,x+Pwidth).setDuration(500).start();

}

return false;

}

@Override

public void onLongPress(MotionEvent e) {

// TODO Auto-generated method stub

}

@Override

public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,

float distanceY) {

// TODO Auto-generated method stub

return false;

}

@Override

public void onShowPress(MotionEvent e) {

// TODO Auto-generated method stub

}

@Override

public boolean onSingleTapUp(MotionEvent e) {

// TODO Auto-generated method stub

return false;

}

@Override

public boolean onTouch(View v, MotionEvent event) {

return gestureDetector.onTouchEvent(event);

}

    

    

private void GetandSaveCurrentImage()  

    {  

 WindowManager windowManager = getWindowManager();  

    Display display = windowManager.getDefaultDisplay();  

    int w = display.getWidth();  

    int h = display.getHeight();  

   

     Bmp = Bitmap.createBitmap( w, h, Config.ARGB_8888 ); 

    //獲取屏幕  

    View decorview = this.getWindow().getDecorView();   

    decorview.setDrawingCacheEnabled(true);   

    Bmp = decorview.getDrawingCache();   

 

   

    }