读书笔记：请求网络的图片

首先发起一个网络请求，请求到图片的url后再去请求图片。

请求图片后返回到主线程处理

private Runnable myRun;

private DefaultHttpClient httpClient;

private Object result;

public void request(final String url) {

Log.i("mjm", "request : " + url);

myRun = new Runnable() {

@Override

public void run() {

Log.i("TAG", url);

httpClient = new DefaultHttpClient();

// 设置网络连接超时时间

httpClient.getParams().setParameter(

CoreConnectionPNames.CONNECTION_TIMEOUT, 5000);

// 设置网络socket通信超时时间

httpClient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT,

3000);

HttpGet httpGet = new HttpGet(url);

HttpResponse httpResponse;

try {

httpResponse = httpClient.execute(httpGet);

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

// 请求成功

if (HttpStatus.SC_OK == code) {

ByteArrayOutputStream baos = new ByteArrayOutputStream();

httpResponse.getEntity().writeTo(baos);

result = new String(baos.toByteArray()).trim();

Log.i("TAG", result.toString());

loadImageFromUrl(result.toString());

} else {// 请求失败

httpGet.abort();

result = "fail";

Log.i("TAG", result.toString());

}

} catch (Exception e) {// 解码异常

e.printStackTrace();

}

}

};

new Thread(myRun).start();

}

public void loadImageFromUrl(final String url) {

Log.i("mjm", "loadImageFromUrl : " + url);

myRun = new Runnable() {

@Override

public void run() {

// TODO Auto-generated method stub

Bitmap bitmap = null;

URL u = null;

HttpURLConnection conn = null;

InputStream is = null;

try {

u = new URL(url);

conn = (HttpURLConnection) u.openConnection();

is = conn.getInputStream();

Log.i("mjm", "is : " + is.toString());

bitmap = BitmapFactory.decodeStream(is);

mLoadImageCallBack.onSuccess(bitmap);

} catch (Exception e) {

Log.i("mjm", "false : " + e.toString());

mLoadImageCallBack.onFail(e.toString());

}

}

};

new Thread(myRun).start();

}