一个popwindow，在弹出的时候背景是原界面的截图加高斯模糊效果：
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先给出popwindow的布局文件
<?xml version="1.0" encoding="utf-8"?>
里面那个自定义imageView控件在我上一篇博客里，下面是activity的布局
用于圆角的背景xml，放在drawable文件夹中
<?xml version="1.0" encoding="UTF-8" ?>
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activity的源码
package com.npi.blureffect;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Point;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.Display;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.PopupWindow;
import android.widget.RelativeLayout;
import android.widget.TextView;
public class TestActivity extends Activity {
TextView textView1;
RelativeLayout window;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test);
textView1 = (TextView) findViewById(R.id.textView1);
window = (RelativeLayout)findViewById(R.id.window);
textView1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
initPopuptWindow(window);
}
});
}
PopupWindow popupWindow;
/**
* 创建PopupWindow
*/
protected void initPopuptWindow(View layout) {
// TODO Auto-generated method stub
//对当前页面进行截屏
layout.setDrawingCacheEnabled(true);
layout.buildDrawingCache(); //启用DrawingCache并创建位图
Bitmap screen = Bitmap.createBitmap(layout.getDrawingCache()); //创建一个DrawingCache的拷贝，因为DrawingCache得到的位图在禁用后会被回收
layout.setDrawingCacheEnabled(false); //禁用DrawingCahce否则会影响性能
//将截屏进行模糊
screen = Blur.fastblur(this, screen, 15);
// 获取自定义布局文件activity_popupwindow_left.xml的视图
final View popupWindow_view = getLayoutInflater().inflate(R.layout.ioswindow, null,
false);
// 创建PopupWindow实例,200,LayoutParams.MATCH_PARENT分别是宽度和高度
final ScrollableImageView background = (ScrollableImageView) popupWindow_view.findViewById(R.id.imageView1);
background.setoriginalImage(screen);
final int screenWidth = getScreenWidth(this);
final int screenHeight = screen.getHeight();
final int heightless = getScreenHeight(this)-screenHeight;
Log.i("Alex", "屏幕宽度为"+screenWidth+"高度为"+screenHeight+"偏差为"+heightless);
popupWindow = new PopupWindow(popupWindow_view, (int) (screenWidth*0.8), (int) (screenWidth*0.85*0.5), true); //设置popwindow的大小
popupWindow.showAtLocation(textView1, Gravity.CENTER, 0, 0);//设置popwindow的位置
popupWindow_view.post(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
int left = screenWidth/10;
Log.i("Alex", screenHeight+"-"+screenWidth*0.85*0.5);
int top = (int) ((screenHeight-screenWidth*0.85*0.5)/2-heightless/2);
Log.i("Alex", "top是"+top);
background.handleScroll(top, left);
}
});
// 设置动画效果
// 点击其他地方消失
TextView confirm = (TextView) popupWindow_view.findViewById(R.id.textView2);
confirm.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
popupWindow.dismiss();
}
});
}
/**
* Get the screen width.
*
* @param context
* @return the screen width
*/
@SuppressWarnings("deprecation")
@SuppressLint("NewApi")
public static int getScreenWidth(Activity context) {
Display display = context.getWindowManager().getDefaultDisplay();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
Point size = new Point();
display.getSize(size);
return size.x;
}
return display.getWidth();
}
/**
* Get the screen height.
*
* @param context
* @return the screen height
*/
@SuppressWarnings("deprecation")
@SuppressLint("NewApi")
public static int getScreenHeight(Activity context) {
Display display = context.getWindowManager().getDefaultDisplay();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
Point size = new Point();
display.getSize(size);
return size.y;
}
return display.getHeight();
}
}
第二种样式，比第一种简单但是效果更明显也更大众化
这个是在原来布局的最上层加上了一个不可见的imageView，在弹出popwindow之前用这个imageView盖住底下的东西
布局如下
activity 如下
package com.npi.blureffect;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.graphics.Point;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.Display;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.PopupWindow;
import android.widget.RelativeLayout;
import android.widget.TextView;
public class DialogActivity extends Activity {
TextView textView1;
RelativeLayout window;
ImageView background;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_dialog);
textView1 = (TextView) findViewById(R.id.textView1);
window = (RelativeLayout)findViewById(R.id.window);
background = (ImageView) findViewById(R.id.background);
textView1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
initPopuptWindow(window);
}
});
}
PopupWindow popupWindow;
/**
* 创建PopupWindow
*/
protected void initPopuptWindow(View layout) {
// TODO Auto-generated method stub
//对当前页面进行截屏
layout.setDrawingCacheEnabled(true);
layout.buildDrawingCache(); //启用DrawingCache并创建位图
Bitmap screen = Bitmap.createBitmap(layout.getDrawingCache()); //创建一个DrawingCache的拷贝，因为DrawingCache得到的位图在禁用后会被回收
layout.setDrawingCacheEnabled(false); //禁用DrawingCahce否则会影响性能
Log.i("Alex", "转换前bitmap的大小是"+screen.getWidth()+" : "+screen.getHeight());
screen = scaleBitmap(screen, screen.getWidth()/2, screen.getHeight()/2);//压缩bitmap到指定大小
Log.i("Alex", "转换后bitmap的大小是"+screen.getWidth()+" : "+screen.getHeight());
//将截屏进行模糊
screen = Blur.fastblur(this, screen, 10);
// 获取自定义布局文件activity_popupwindow_left.xml的视图
final View popupWindow_view = getLayoutInflater().inflate(R.layout.ioswindow, null,
false);
// 创建PopupWindow实例,200,LayoutParams.MATCH_PARENT分别是宽度和高度
background.setImageBitmap(screen);
background.setVisibility(View.VISIBLE);
final int screenWidth = getScreenWidth(this);
popupWindow = new PopupWindow(popupWindow_view, (int) (screenWidth*0.8), (int) (screenWidth*0.85*0.5), true); //设置popwindow的大小
popupWindow.showAtLocation(textView1, Gravity.CENTER, 0, 0);//设置popwindow的位置
popupWindow_view.post(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
int left = screenWidth/10;
}
});
// 设置动画效果
// 点击其他地方消失
TextView confirm = (TextView) popupWindow_view.findViewById(R.id.textView2);
confirm.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
background.setVisibility(View.GONE);
popupWindow.dismiss();
}
});
}
/**
* Get the screen width.
*
* @param context
* @return the screen width
*/
@SuppressWarnings("deprecation")
@SuppressLint("NewApi")
public static int getScreenWidth(Activity context) {
Display display = context.getWindowManager().getDefaultDisplay();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
Point size = new Point();
display.getSize(size);
return size.x;
}
return display.getWidth();
}
/**
* 把一个bitmap压缩，压缩到指定大小
* @param bm
* @param width
* @param height
* @return
*/
private static Bitmap scaleBitmap(Bitmap bm, float width, float height) {
if (bm == null) {
return null;
}
int bmWidth = bm.getWidth();
int bmHeight = bm.getHeight();
float scaleWidth = width / bmWidth;
float scaleHeight = height / bmHeight;
Matrix matrix = new Matrix();
matrix.postScale(scaleWidth, scaleHeight);
if (scaleWidth == 1 && scaleHeight == 1) {
return bm;
} else {
Bitmap resizeBitmap = Bitmap.createBitmap(bm, 0, 0, bmWidth,
bmHeight, matrix, false);
bm.recycle();//回收图片内存
bm.setDensity(240);
return resizeBitmap;
}
}
} 以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持创新互联。
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