本案例使用ImageView 简单的实现了网络图片的调用。当中注意事项。由于用到了网络，这里採用了HttpClient方法訪问网络联接，关于怎样使用，可參照文章 Android中使用HttpClient实现HTTP通信效果 ，因此。须要注意配置网络权限问题。以及须要使用新线程及Handler来更新Activity，不然会直接报错Not Main Thread

看实例：

MainActivity.java

package com.example.imageview;

import android.os.Bundle;

import android.os.Handler;

import android.app.Activity;

import android.graphics.Bitmap;

import android.view.Menu;

import android.widget.ImageView;

public class MainActivity extends Activity {

private Bitmap bm = null;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

final Handler handler = new Handler();

new Thread() {

public void run() {

bm = new ApacheHttpClient()

.getHttpBmp("http://www.qilujiaju.com/data/attachment/block/c9/c960ba426890a8ddbfc35d2b4b0d97c9.jpg");

handler.post(new Runnable() {

@Override

public void run() {

// TODO Auto-generated method stub

ImageView imageView = (ImageView) findViewById(R.id.imageView1);

imageView.setImageBitmap(bm);

}

});

}

}.start();

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.activity_main, menu);

return true;

}

}

ApacheHttpClient.java

package com.example.imageview;

import java.io.IOException;

import java.io.InputStream;

import org.apache.http.HttpResponse;

import org.apache.http.HttpStatus;

import org.apache.http.client.ClientProtocolException;

import org.apache.http.client.HttpClient;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.impl.client.DefaultHttpClient;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.util.Log;

public class ApacheHttpClient {

private static final String TAG = "Error";

public InputStream httpGet(String url) {

InputStream result = null;

HttpClient httpClient = new DefaultHttpClient();

HttpGet httpGet = new HttpGet(url);

HttpResponse httpResponse = null;

try {

httpResponse = httpClient.execute(httpGet);

int httpStatus = httpResponse.getStatusLine().getStatusCode();

if (httpStatus == HttpStatus.SC_OK) {

InputStream in = httpResponse.getEntity().getContent();

try {

result = in;

} catch (Exception e) {

Log.i(TAG, "Exception");

// TODO Auto-generated catch block

e.printStackTrace();

}

} else {

result = null;

}

} catch (ClientProtocolException e) {

// TODO Auto-generated catch block

e.printStackTrace();

Log.i(TAG, "ClientProtocolException");

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

Log.i(TAG, "ClientProtocolException");

}

return result;

}

public Bitmap getHttpBmp(String url) {

Bitmap bm = null;

InputStream is = httpGet(url);

bm = BitmapFactory.decodeStream(is);

return bm;

}

}

AndroidMainFest.xml

<?

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

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

package="com.example.imageview"

android:versionCode="1"

android:versionName="1.0" >

<uses-sdk

android:minSdkVersion="8"

android:targetSdkVersion="16" />

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

<application

android:allowBackup="true"

android:icon="@drawable/ic_launcher"

android:label="@string/app_name"

android:theme="@style/AppTheme" >

<activity

android:name="com.example.imageview.MainActivity"

android:label="@string/app_name" >

<intent-filter>

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

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

</intent-filter>

</activity>

</application>

</manifest>

activity_main.xml

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

xmlns:tools="http://schemas.android.com/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context=".MainActivity" >

<ImageView

android:id="@+id/imageView1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_alignParentTop="true"

android:src="@drawable/app" />

</RelativeLayout>

这是一个完整的实例，可直接执行于模拟器或真机。