一个简单的从网上下载一张图片的例子。直接上代码:
package com.suns.picturetest; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.Bundle; import android.widget.ImageView; public class PictrueTestActivity extends Activity { /** Called when the activity is first created. */ private ImageView view=null; private String imageurl="http://www.bling0.com/system/avatars/4855/small/p_large_mnrk_71320001d24e2d0e.jpg?1323678179"; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); view=(ImageView)findViewById(R.id.picture); view.setImageBitmap(returnBitMap(imageurl)); } public Bitmap returnBitMap(String url) { URL myurl=null; Bitmap bitmap=null; try{ myurl=new URL(url); }catch(Exception e) { e.printStackTrace(); } try{ HttpURLConnection conn=(HttpURLConnection)myurl.openConnection(); conn.setDoInput(true); conn.connect(); InputStream is =conn.getInputStream(); bitmap = BitmapFactory.decodeStream(is); is.close(); }catch(Exception e) { e.printStackTrace(); } return bitmap; } }
xml文件:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <ImageView android:id="@+id/picture" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_gravity="center" /> </LinearLayout>