以下是我的代码：
private HttpURLConnection connection;
private InputStream is;
public void upload() {
try {
URL url = new URL(URLPath);
connection = (HttpURLConnection) url.openConnection();
connection.setConnectTimeout(30000);
connection.setReadTimeout(30000);
connection.setDoInput(true);
connection.setUseCaches(false);
connection.connect();
is = connection.getInputStream();
} catch (Exception e) {
e.printStackTrace();
}
}
public void stopupload() {
connection = null;
is = null;
}
当我上传文件时,行为= connection.getInputStream();会花很多时间来回复.所以我想实现stopupload()的停止函数.但是如果在代码在线is = connection.getInputStream())处调用stopupload();它仍然需要等待它的回复.
我想在stopupload()实现时立即停止等待.我该怎么做？
解决方法
But if I call
stopupload()while the code is handling at lineis =,it still needs to wait for its reply.
connection.getInputStream();
从HoneyComb开始,所有网络操作都不允许在主线程上执行.为避免获得NetworkOnMainThreadException,您可以使用Thread或AsyncTask.
I want to stop waiting at once while implement stopupload(). How can I
do it?
以下代码让用户在2秒钟后停止上传,但您可以相应地修改睡眠时间(应少于5秒).
上传：
public void upload() {
try {
URL url = new URL(URLPath);
connection = (HttpURLConnection) url.openConnection();
connection.setConnectTimeout(30000);
connection.setReadTimeout(30000);
connection.setDoInput(true);
connection.setUseCaches(false);
connection.connect();
// run uploading activity within a Thread
Thread t = new Thread() {
public void run() {
is = connection.getInputStream();
if (is == null) {
throw new RuntimeException("stream is null");
}
// sleep 2 seconds before "stop uploading" button appears
mHandler.postDelayed(new Runnable() {
public void run() {
mBtnStop.setVisibility(View.VISIBLE);
}
},2000);
}
};
t.start();
} catch (Exception e) {
e.printStackTrace();
} finally {
if (is != null) {
try {
is.close();
} catch (IOException e) {
}
}
if (connection != null) {
connection.disconnect();
}
}
}
的onCreate：
@Override
public void onCreate(Bundle savedInstanceState) {
// more codes...
Handler mHandler = new Handler();
mBtnStop = (Button) findViewById(R.id.btn_stop);
mBtnStop.setBackgroundResource(R.drawable.stop_upload);
mBtnStop.setOnClickListener(mHandlerStop);
mBtnStop.setVisibility(View.INVISIBLE);
View.OnClickListener mHandlerStop = new View.OnClickListener() {
@Override
public void onClick(View v) {
stopUpload(); // called when "stop upload" button is clicked
}
};
// more codes...
}
