android读取远程图片案例

关键代码：
Bitmap bitmap=BitmapFactory.decodeByteArray(data, 0, data.length);
imageview.setImageBitmap(bitmap);

注意访问网络权限：<uses-permission android:name="android.permission.INTERNET"/>

完整测试代码如下：

 package caicai.cn.netimag;

  import java.io.ByteArrayOutputStream;

  import java.io.InputStream;

  import java.net.HttpURLConnection;

  import java.net.URL;

  public class imageserver {

  public static byte[] getimage(String path) throws Exception{ //连接远程网址

  URL url=new URL(path);

  HttpURLConnection conn=(HttpURLConnection) url.openConnection();

  conn.setConnectTimeout(5000);

  conn.setRequestMethod("GET");

  if(conn.getResponseCode()==200){

  InputStream instream=conn.getInputStream();

  return read(instream);

  }

  return null;

  }

  private static byte[] read(InputStream instream) throws Exception{ //  读取数据流，返回字节数据流

  ByteArrayOutputStream outstream=new ByteArrayOutputStream();

  byte[] buffer=new byte[1024];

  while( (instream.read(buffer))!=-1){

  outstream.write(buffer);

  }

  instream.close();

  return outstream.toByteArray();

  }

  }

imageserver.java

 package caicai.cn.netimag;

  import android.app.Activity;

  import android.graphics.Bitmap;

  import android.graphics.BitmapFactory;

  import android.os.Bundle;

  import android.view.View;

  import android.widget.ImageView;

  import android.widget.Toast;

  public class NetimageActivity extends Activity {

  public ImageView imageview;

  public void onCreate(Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);

  setContentView(R.layout.main);

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

  }

  public void submit(View v){

  String path="http://192.168.0.117/testxml/bottom.png";

  try{

    byte[] data=imageserver.getimage(path);

    Bitmap bitmap=BitmapFactory.decodeByteArray(data, 0, data.length);   //生成图片工厂

  imageview.setImageBitmap(bitmap);  //显示图片

  }catch(Exception e){

  Toast.makeText(getApplicationContext(), "出错了", 1).show();

  }

  }

  }

NetimageActivity.java

 <?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" >

  <Button

  android:layout_width="fill_parent"

  android:layout_height="wrap_content"

  android:text="获取网络图片"

  android:onClick="submit"/>

  <ImageView

  android:layout_width="fill_parent"

  android:layout_height="wrap_content"

  android:id="@+id/imageview"

  android:src="@drawable/ic_launcher"

  />

  </LinearLayout>

main.xml

 <?xml version="1.0" encoding="utf-8"?>

  <manifest xmlns:android="http://schemas.android.com/apk/res/android"

  package="caicai.cn.netimag"

  android:versionCode="1"

  android:versionName="1.0" >

  <uses-sdk android:minSdkVersion="8" />

  <uses-permission android:name="android.permission.INTERNET"/>

  <application

  android:icon="@drawable/ic_launcher"

  android:label="@string/app_name" >

  <activity

  android:label="@string/app_name"

  android:name=".NetimageActivity" >

  <intent-filter >

  <action android:name="android.intent.action.MAIN" />

  <category android:name="android.intent.category.LAUNCHER" />

  </intent-filter>

  </activity>

  </application>

  </manifest>

AndroidManifest.xml

更新最新加载方法

	/**

	 * 根据一个网络连接(String)获取bitmap图像

	 *

	 * @param imageUri

	 * @return

	 * @throws MalformedURLException

	 */

	public static Bitmap getbitmap(String imageUri) {

		// 显示网络上的图片

		Bitmap bitmap = null;

		try {

			URL myFileUrl = new URL(imageUri);

			HttpURLConnection conn = (HttpURLConnection) myFileUrl.openConnection();

			conn.setDoInput(true);

			conn.connect();

			InputStream is = conn.getInputStream();

			bitmap = BitmapFactory.decodeStream(is);

			is.close();

		} catch (IOException e) {

			e.printStackTrace();

			return null;

		}

		return bitmap;

	}

秒客网

android读取远程图片案例

相关文章