Start async task android

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.provider.Settings.System;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.view.View.OnClickListener;

public class AsyncTaskActivity extends Activity implements OnClickListener {

    Button btn;
    AsyncTask<?, ?, ?> runningTask;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        btn = findViewById(R.id.button1);

        // Because we implement OnClickListener, we only
        // have to pass "this" (much easier)
        btn.setOnClickListener(this);
    }

    @Override
    public void onClick(View view) {
        // Detect the view that was "clicked"
        switch (view.getId()) {
        case R.id.button1:
            if (runningTask != null)
                runningTask.cancel(true);
            runningTask = new LongOperation();
            runningTask.execute();
            break;
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        // Cancel running task(s) to avoid memory leaks
        if (runningTask != null)
            runningTask.cancel(true);
    }

    private final class LongOperation extends AsyncTask<Void, Void, String> {

        @Override
        protected String doInBackground(Void... params) {
            for (int i = 0; i < 5; i++) {
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    // We were cancelled; stop sleeping!
                }
            }
            return "Executed";
        }

        @Override
        protected void onPostExecute(String result) {
            TextView txt = (TextView) findViewById(R.id.output);
            txt.setText("Executed"); // txt.setText(result);
            // You might want to change "executed" for the returned string
            // passed into onPostExecute(), but that is up to you
        }
    }
}

Source: stackoverflow.com

Similar codes

5 votes449 views1 answer
Print up to 2 decimal in java
Java
3 votes373 views1 answer
Caused by: java.lang.NoSuchMethodError: org.apache.logging.log4j.spi.LoggerContextFactory.isClassLoaderDependent()Z
Java
0 vote355 views1 answer
How to get token oauth2.0 java example response
Java
0 vote380 views1 answer
Java compareto jdei stackoverflow
Java
0 vote428 views1 answer
How to pass path parameter in url in spring rest
Java Spring
0 vote379 views1 answer
How to convert milliseconds into second in android studio
Java
0 vote403 views4 answers
For() in java
Java
0 vote363 views1 answer
Ezra margolin
Java
4 votes378 views2 answers
How to use decimal format java
Java
25 votes335 views3 answers
Random in java a to b
Java