下载显示网路图片的例子

edison_cool911

一个很简单的例子,直接上代码:
1. ShowUrlImage.java文件
package cn.com;import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import android.app.Activity;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.ImageView;public class ShowUrlImage extends Activity{  private Button Image_btn;  private ImageView imageShow;  String uriPic = "http://lh3.ggpht.com/_s354WAuIc9E/"      + "R_DpW4Rzj-I/AAAAAAAAAsc/Ox73tdxGLSw/logo.jpg";  /** Called when the activity is first created. */  @Override  public void onCreate(Bundle savedInstanceState)  {    super.onCreate(savedInstanceState);    setContentView(R.layout.main);    Image_btn = (Button) findViewById(R.id.Image);    imageShow = (ImageView) findViewById(R.id.imageShow);    Image_btn.setOnClickListener(new Button.OnClickListener()    {      @Override      public void onClick(View arg0)      {        /* 设置Bitmap在ImageView中 */        imageShow.setImageBitmap(getURLBitmap());      }    });  }  public Bitmap getURLBitmap()  {    URL imageUrl = null;    Bitmap bitmap = null;    try    {      /* new URL对象将网址传入 */      imageUrl = new URL(uriPic);    } catch (MalformedURLException e)    {      e.printStackTrace();    }    try    {      /* 取得连接 */      HttpURLConnection conn = (HttpURLConnection) imageUrl          .openConnection();      conn.connect();      /* 取得返回的InputStream */      InputStream is = conn.getInputStream();      // is.read(b)      /* 将InputStream变成Bitmap */      bitmap = BitmapFactory.decodeStream(is);      /* 关闭InputStream */      is.close();    } catch (IOException e)    {      e.printStackTrace();    }    return bitmap;  }}
2.main.xml文件
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent" android:layout_height="fill_parent"><ImageView android:id="@+id/imageShow"android:layout_below="@+id/myButton1" android:layout_width="wrap_content"android:layout_height="wrap_content" android:layout_gravity="center" /><Button android:id="@+id/Image" android:layout_width="wrap_content"android:layout_height="wrap_content" android:text="image"android:layout_alignParentBottom="true" /></RelativeLayout>

外加注意权限设定:
<uses-permission android:name="android.permission.INTERNET">  </uses-permission>