利用Http从指定地址下载图片并显示出来
创新互联专注于企业全网整合营销推广、网站重做改版、浪卡子网站定制设计、自适应品牌网站建设、HTML5建站、商城网站建设、集团公司官网建设、外贸网站建设、高端网站制作、响应式网页设计等建站业务，价格优惠性价比高，为浪卡子等各大城市提供网站开发制作服务。
/**
* 简单的封装一个http下载类
* */
public class HttpUtils {
//指定一张图片
private String URL_PATH = "http://img.wangxiao.cn/files/RemoteFiles/20140420/095185001.jpg";
public HttpUtils(){
}
//返回一个byte类型的数组
public byte[] getData(){
HttpClient httpClient = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(URL_PATH);
HttpResponse httpResponse = null;
try {
httpResponse = httpClient.execute(httpGet);
if (httpResponse.getStatusLine().getStatusCode() == 200) {
byte[] data = EntityUtils.toByteArray(httpResponse
.getEntity());
return data;
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}//用于调用的avtivity
public class MainActivity extends Activity {
private Button btnDown;
private ImageView img;
private ProgressDialog dialog;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnDown = (Button) findViewById(R.id.button1);
img = (ImageView) findViewById(R.id.p_w_picpathView1);
dialog = new ProgressDialog(this);
dialog.setTitle("提示信息");
dialog.setMessage("正在下载中，请稍后...");
dialog.setCancelable(false);
btnDown.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new Thread(mRunnable).start();
dialog.show();
}
});
}
private Runnable mRunnable = new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
byte[] data = new HttpUtils().getData();
Message msg = Message.obtain();
msg.obj = data;
msg.what = 0x001;
handler.sendMessage(msg);
}
};
private Handler handler = new Handler() {
// 在Handler中获取消息，重写handleMessage()方法
@Override
public void handleMessage(Message msg) {
// 判断消息码是否为0x001
if(msg.what == 0x001){
byte[] data=(byte[])msg.obj;
Bitmap bmp=BitmapFactory.decodeByteArray(data, 0, data.length);
img.setImageBitmap(bmp);
dialog.dismiss();
}
}
};
}