package course.examples.Threading.ThreadingAsyncTask;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
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.ImageView;
import android.widget.ProgressBar;
import android.widget.Toast;
public class AsyncTaskActivity extends Activity {
private final static String TAG = "ThreadingAsyncTask";
private ImageView mImageView;
private ProgressBar mProgressBar;
private int mDelay = 500;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mImageView = (ImageView) findViewById(R.id.imageView);;
mProgressBar = (ProgressBar) findViewById(R.id.progressBar);
final Button button = (Button) findViewById(R.id.loadButton);
button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
new LoadIconTask().execute(R.drawable.painter);
}
});
final Button otherButton = (Button) findViewById(R.id.otherButton);
otherButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(AsyncTaskActivity.this, "I'm Working",
Toast.LENGTH_SHORT).show();
}
});
}
class LoadIconTask extends AsyncTask<Integer, Integer, Bitmap> {
@Override
protected void onPreExecute() {
mProgressBar.setVisibility(ProgressBar.VISIBLE);
}
@Override
protected Bitmap doInBackground(Integer... resId) {
Bitmap tmp = BitmapFactory.decodeResource(getResources(), resId[0]);
// simulating long-running operation
for (int i = 1; i < 11; i++) {
sleep();
publishProgress(i * 10);
}
return tmp;
}
@Override
protected void onProgressUpdate(Integer... values) {
mProgressBar.setProgress(values[0]);
}
@Override
protected void onPostExecute(Bitmap result) {
mProgressBar.setVisibility(ProgressBar.INVISIBLE);
mImageView.setImageBitmap(result);
}
private void sleep() {
try {
Thread.sleep(mDelay);
} catch (InterruptedException e) {
Log.e(TAG, e.toString());
}
}
}
}