Background Thread

gistfile1.java

public class MainActivity extends AppCompatActivity {
  public static final String TAG = "MainActivity";
  /** You can also choose a cached thread pool to run threads in parallel. */
  public static final Executor sExecutor = Executors.newSingleThreadExecutor();

  @Override protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    setSupportActionBar((Toolbar) findViewById(R.id.toolbar));
  }

  @Override protected void onStop() {
    super.onStop();
    sExecutor.execute(new Runnable() {
      @Override public void run() {
        Log.i("BackgroundThread", "I am sleeping");
        SystemClock.sleep(30000);
        Log.i("BackgroundThread", "I am returned");
      }
    });
  }

  @Override protected void onDestroy() {
    super.onDestroy();
    Log.i(TAG, "I was destroyed");
  }
}