How to set a Timeout for an AsyncTask in Android?

AndroidApps/ApplicationsMobile Development

This example demonstrates how do I set a Timeout for an AsyncTask in android.

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/activity_main.xml.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:padding="16dp"
   tools:context=".MainActivity">
   <EditText
      android:layout_marginTop="50dp"
      android:id="@+id/enterTime"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centerHorizontal="true"
      android:background="@android:drawable/editbox_background"
      android:inputType="number"/>
   <Button
      android:id="@+id/btnRun"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:text="Run Async task"
      android:layout_below="@+id/enterTime"
      android:layout_centerHorizontal="true" />
</RelativeLayout>

Step 3 − Add the following code to src/MainActivity.java

import androidx.appcompat.app.AppCompatActivity;
import android.app.ProgressDialog;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
   Button button;
   EditText editTextTime;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      button = findViewById(R.id.btnRun);
      editTextTime = findViewById(R.id.enterTime);
      button.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            AsyncTaskRunner runner = new AsyncTaskRunner();
            String sleepTime = editTextTime.getText().toString();
            runner.execute(sleepTime);
         }
      });
   }
   private class AsyncTaskRunner extends AsyncTask<String, String, String> {
      ProgressDialog progressDialog;
      @Override
      protected String doInBackground(String... params) {
         publishProgress("AsyncTask started...");
         String resp;
         try {
            int time = Integer.parseInt(params[0]) * 1000;
            Thread.sleep(time);
            resp = "Slept for " + params[0] + " seconds";
         }
         catch (Exception e) {
            e.printStackTrace();
            resp = e.getMessage();
         }
         return resp;
      }
      @Override
      protected void onPostExecute(String result) {
         progressDialog.dismiss();
         Toast.makeText(MainActivity.this, "AsyncTask Terminated", Toast.LENGTH_SHORT).show();
      }
      @Override
      protected void onPreExecute() {
         progressDialog = ProgressDialog.show(MainActivity.this, "ProgressDialog", "Wait for " + editTextTime.getText().toString() + " seconds");
      }
      @Override
      protected void onProgressUpdate(String... text) {
         Toast.makeText(MainActivity.this, "" + text[0], Toast.LENGTH_SHORT).show();
      }
   }
}

Step 4 − Add the following code to androidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.sample">
   <application
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:roundIcon="@mipmap/ic_launcher_round"
      android:supportsRtl="true"
      android:theme="@style/AppTheme">
      <activity android:name=".MainActivity">
         <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
      </activity>
   </application>
</manifest>

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run  icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −

Click here to download the project code.

raja
Published on 22-Nov-2019 16:49:45
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