class PageTask extends AsyncTask<String, Integer, String> {
// 可变长的输入参数,与AsyncTask.exucute()对应
ProgressDialog pdialog;
public PageTask(Context context){
pdialog = new ProgressDialog(context, 0);
pdialog.setButton("cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int i) {
dialog.cancel();
}
});
pdialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
public void onCancel(DialogInterface dialog) {
finish();
}
});
pdialog.setCancelable(true);
pdialog.setMax(100);
pdialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
pdialog.show();
}
@Override
protected String doInBackground(String... params) {
try{
HttpClient client = new DefaultHttpClient();
// params[0]代表连接的url
HttpGet get = new HttpGet(params[0]);
HttpResponse response = client.execute(get);
HttpEntity entity = response.getEntity();
long length = entity.getContentLength();
InputStream is = entity.getContent();
String s = null;
if(is != null) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buf = new byte[128];
int ch = -1;
int count = 0;
while((ch = is.read(buf)) != -1) {
baos.write(buf, 0, ch);
count += ch;
if(length > 0) {
// 如果知道响应的长度,调用publishProgress()更新进度
publishProgress((int) ((count / (float) length) * 100));
}
// 让线程休眠100ms
Thread.sleep(100);
}
s = new String(baos.toByteArray()); }
// 返回结果
return s;
} catch(Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onCancelled() {
super.onCancelled();
}
@Override
protected void onPostExecute(String result) {
// 返回HTML页面的内容
message.setText(result);
pdialog.dismiss();
}
@Override
protected void onPreExecute() {
// 任务启动,可以在这里显示一个对话框,这里简单处理
message.setText(R.string.task_started);
}
@Override
protected void onProgressUpdate(Integer... values) {
// 更新进度
System.out.println(""+values[0]);
message.setText(""+values[0]);
pdialog.setProgress(values[0]);
}
}
}
// 可变长的输入参数,与AsyncTask.exucute()对应
ProgressDialog pdialog;
public PageTask(Context context){
pdialog = new ProgressDialog(context, 0);
pdialog.setButton("cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int i) {
dialog.cancel();
}
});
pdialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
public void onCancel(DialogInterface dialog) {
finish();
}
});
pdialog.setCancelable(true);
pdialog.setMax(100);
pdialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
pdialog.show();
}
@Override
protected String doInBackground(String... params) {
try{
HttpClient client = new DefaultHttpClient();
// params[0]代表连接的url
HttpGet get = new HttpGet(params[0]);
HttpResponse response = client.execute(get);
HttpEntity entity = response.getEntity();
long length = entity.getContentLength();
InputStream is = entity.getContent();
String s = null;
if(is != null) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buf = new byte[128];
int ch = -1;
int count = 0;
while((ch = is.read(buf)) != -1) {
baos.write(buf, 0, ch);
count += ch;
if(length > 0) {
// 如果知道响应的长度,调用publishProgress()更新进度
publishProgress((int) ((count / (float) length) * 100));
}
// 让线程休眠100ms
Thread.sleep(100);
}
s = new String(baos.toByteArray()); }
// 返回结果
return s;
} catch(Exception e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onCancelled() {
super.onCancelled();
}
@Override
protected void onPostExecute(String result) {
// 返回HTML页面的内容
message.setText(result);
pdialog.dismiss();
}
@Override
protected void onPreExecute() {
// 任务启动,可以在这里显示一个对话框,这里简单处理
message.setText(R.string.task_started);
}
@Override
protected void onProgressUpdate(Integer... values) {
// 更新进度
System.out.println(""+values[0]);
message.setText(""+values[0]);
pdialog.setProgress(values[0]);
}
}
}