【实例简介】

【实例截图】

【核心代码】

package wyb.ui;

import java.io.BufferedInputStream;

import java.net.URL;

import dd.dd.R;

import android.app.Activity;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.graphics.Color;

import android.graphics.Matrix;

import android.os.Bundle;

import android.view.Display;

import android.view.Gravity;

import android.view.LayoutInflater;

import android.view.MotionEvent;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.ViewGroup.LayoutParams;

import android.widget.ImageView;

import android.widget.PopupWindow;

import android.widget.TextView;

public class MainActivity extends Activity{

/** Called when the activity is first created. */

ImageView imageView;

TextView textView;

Display display;

Bitmap mBitmap;

String url="http://hiphotos.baidu.com/baidu/pic/item/f603918fa0ec08fabf7a641659ee3d6d55fbda0d.jpg";

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

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

textView=(TextView) findViewById(R.id.tv);

display = getWindowManager().getDefaultDisplay();

//也是一种异步加载图片的方法

new Thread(new Runnable() {

public void run() {

try {

mBitmap = getBitmapFromUrl();

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

imageView.post(new Runnable() {

public void run() {

imageView.setImageBitmap(mBitmap);

}

});

}

}).start();

imageView.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

initPopWindow();

}

});

}

private void initPopWindow() {

// 加载popupWindow的布局文件

View contentView = LayoutInflater.from(getApplicationContext())

.inflate(R.layout.popup, null);

// 设置popupWindow的背景颜色

contentView.setBackgroundColor(Color.BLACK);

// 声明一个弹出框

final PopupWindow popupWindow = new PopupWindow(

contentView, LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);

popupWindow.setFocusable(true);

popupWindow.showAtLocation(textView, Gravity.CENTER_VERTICAL, 0, 0);

ImageView imageView=(ImageView) contentView.findViewById(R.id.logo_b);

int width = display.getWidth()-50;

int height = display.getHeight()-50;

//将图片设置为宽100，高200，在这儿就可以实现图片的大小缩放

Bitmap resize=Bitmap.createScaledBitmap(mBitmap, height, width, true);

Matrix m=new Matrix();

m.setRotate(90); //逆时针旋转15度

//做好旋转与大小之后，重新创建位图，0-width宽度上显示的区域，高度类似

Bitmap b=Bitmap.createBitmap(resize, 0, 0, height, width, m, true);

//显示图片

imageView.setImageBitmap(b);

imageView.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

// TODO Auto-generated method stub

popupWindow.dismiss();

}

});

}

/**

* 将url转换为bitmap(图片)

*

* @param url

* @return

* @throws Exception

*/

public Bitmap getBitmapFromUrl() throws Exception {

URL mUrl = new URL(url);

BufferedInputStream bis = new BufferedInputStream(mUrl.openConnection().getInputStream());

Bitmap bitmap = BitmapFactory.decodeStream(bis);

bis.close();

return bitmap;

}

}