我在AsyncTask doInBackground中运行了一个长时间运行的进程（这是一个servlet调用），该进程可能会运行超过5分钟。但是 5 分钟后，servlet 返回，我遇到了超时问题。
下面是我的代码：
import java.util.ArrayList;
import java.util.List;
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;
import com.example.hanamom.LoginActivity.GetXMLTask;
import android.app.Activity;
import android.app.ActivityManager;
import android.app.ActivityManager.RunningTaskInfo;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.ComponentName;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.app.ProgressDialog;
public class NewInstallationActivity extends Activity {
Button install;
EditText branch_enter;
EditText cl_enter;
EditText sid_enter;
EditText sidpwd_enter;
EditText systempwd_enter;
EditText instance_enter;
EditText installationlocation_enter;
Bundle extras;
EditText desc_enter;
ProgressDialog pd;
public static final String URL = "<a servlet call>";
ArrayList<NameValuePair> postParameters = new ArrayList<NameValuePair>();
Intent intent;
String login_user,host,rootuser,rootpassword;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.install);
addListenerOnButton();
Log.e("test", "Entered New Instlalaiton activity");
branch_enter = (EditText) findViewById(R.id.branch_enter);
cl_enter = (EditText) findViewById(R.id.cl_enter);
sid_enter = (EditText) findViewById(R.id.sid_enter);
sidpwd_enter = (EditText) findViewById(R.id.sidpwd_enter);
systempwd_enter = (EditText) findViewById(R.id.systempwd_enter);
instance_enter=(EditText) findViewById(R.id.instance_enter);
installationlocation_enter=(EditText) findViewById(R.id.installationlocation_enter);
Bundle extras = this.getIntent().getExtras();
login_user=extras.getString("login_user").trim();
host = extras.getString("promptshost");
rootuser = extras.getString("lrootUser");
rootpassword = extras.getString("lrootpwd");
Log.e("login user",login_user);
Log.e("rootuser=",rootuser);
Log.e("rootpassword=",rootpassword);
}
private void addListenerOnButton() {
// TODO Auto-generated method stub
final Context context = this;
branch_enter = (EditText) findViewById(R.id.branch_enter);
cl_enter = (EditText) findViewById(R.id.cl_enter);
sid_enter = (EditText) findViewById(R.id.sid_enter);
sidpwd_enter = (EditText) findViewById(R.id.sidpwd_enter);
systempwd_enter = (EditText) findViewById(R.id.systempwd_enter);
instance_enter=(EditText) findViewById(R.id.instance_enter);
installationlocation_enter=(EditText) findViewById(R.id.installationlocation_enter);
install = (Button) findViewById(R.id.install);
install.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
GetXMLTask task = new GetXMLTask();
task.execute(new String[] { URL });
}
});
}
private class GetXMLTask extends AsyncTask<String, Void, String> {
String response = "false";
private ProgressDialog pd;
protected void onPreExecute() {
pd = new ProgressDialog(NewInstallationActivity.this);
pd.setMessage("Please wait while SAP HANA system is being Installed..");
pd.setIndeterminate(false);
pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
pd.setProgress(0);
pd.show();
}
protected String doInBackground(String... urls) {
try {
Log.e("NewInstallationActivty", "New installation");
String branch=branch_enter.getText().toString();
String cl = cl_enter.getText().toString();
String sid=sid_enter.getText().toString();
String sidpwd=sidpwd_enter.getText().toString();
String systempwd=systempwd_enter.getText().toString();
String instance=instance_enter.getText().toString();
String installationlocation=installationlocation_enter.getText().toString();
Log.e("Branch=",branch);
Log.e("Host=",host);
Log.e("sid=",sid);
Log.e("sidpwd=",sidpwd);
Log.e("systempwd=",systempwd);
Log.e("instance=",instance);
Log.e("installationlocation=",installationlocation);
Log.e("rootuser=",rootuser);
Log.e("rootpassword=",rootpassword);
// String osuser=osuser_enter.getText().toString();
// String ospassword=ospassword_enter.getText().toString();
Log.e("NewInstlalationActivity", "installtion");
postParameters.add(new BasicNameValuePair("branch",branch));
postParameters.add(new BasicNameValuePair("cl", cl));
postParameters.add(new BasicNameValuePair("sid", sid));
postParameters.add(new BasicNameValuePair("sidpwd", sidpwd));
postParameters.add(new BasicNameValuePair("systempwd",systempwd));
postParameters.add(new BasicNameValuePair("instance",instance));
postParameters.add(new BasicNameValuePair("installationlocation",installationlocation));
postParameters.add(new BasicNameValuePair("host",host));
postParameters.add(new BasicNameValuePair("rootuser", rootuser));
postParameters.add(new BasicNameValuePair("rootpassword", rootpassword));
postParameters.add(new BasicNameValuePair("intent","install"));
Log.e("NewInstlalationActivity", "post parameters");
for (String url : urls) {
response = CustomHttpClient.executeHttpPost(url,postParameters);
}
}
catch(Exception e) {}
return "Success";
}
protected void onPostExecute(String output) {
Log.e("Login Activity",response);
while(!response.trim().equals("True"))
{
pd.show();
pd.setProgress(100);
continue;
}
if (response.trim().equals("True"))
{
Log.e("Entered Response = True", response);
pd.dismiss();
Intent intent = new Intent(getBaseContext(), NewInstallationActivity.class);
startActivity(intent);
}
else
{
Log.e("Else code","Else");
AlertDialog alertDialog = new AlertDialog.Builder(
NewInstallationActivity.this).create();
alertDialog.setTitle("Installation Failed!");
// Setting Dialog Message
alertDialog.setMessage(" Check logs at /var/tmp");
// Setting Icon to Dialog
//alertDialog.setIcon(R.drawable.tick);
// Setting OK Button
alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// Write your code here to execute after dialog closed
Toast.LENGTH_SHORT).show();
}
});
// Showing Alert Message
alertDialog.show();
}
}
}
}
在这里，我的进程对话框将等到我从 servlet 获得 True，但恰好在 5 分钟后，它正在发送一个 false。
有什么方法可以等待超过5分钟。任何提示都会有所帮助。
谢谢。
您可以尝试以下操作：
private final static long TIMETOWAIT = 30000; // Set your timeout.
....
GetXMLTask.get(TIMETOWAIT,TimeUnit.MILLISECONDS);
....
供参考： http://developer.android.com/reference/android/os/AsyncTask.html#get%28long,%20java.util.concurrent.TimeUnit%29