非同步處理之動畫按鈕AsyncTask類

package mars.com;import android.app.Activity;import android.os.AsyncTask;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.ImageButton;import android.widget.Toast;public class DemoMoveButton extends Activity {private ImageButton imageButton;private ButtonAsyncTask but;private static boolean JUDGE = true;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);imageButton = (ImageButton) findViewById(R.id.imageButton1);imageButton.setOnClickListener(new OnClickListener() {public void onClick(View v) {Toast.makeText(getApplicationContext(), "測試，王玉超",Toast.LENGTH_SHORT).show();but.cancel(true);}});but = new ButtonAsyncTask();but.execute(100);}private class ButtonAsyncTask extends AsyncTask<Integer, Integer, String> {int i = 0;@Overrideprotected void onPostExecute(String result) {// 可以更新UI}@Overrideprotected void onProgressUpdate(Integer... values) {// 可以更新UIint imageID[] = new int[] { R.drawable.run0, R.drawable.run1,R.drawable.run2, R.drawable.run3, R.drawable.run4,R.drawable.run5, R.drawable.run6, R.drawable.run7 };imageButton.setImageResource(imageID[i++]);if (i == 7) {i = 0;}}@Overrideprotected String doInBackground(Integer... params) {// 不能更新UIwhile (JUDGE == true) {try {Thread.sleep(params[0]);// 延遲的操作由外部決定this.publishProgress(params);} catch (InterruptedException e) {e.printStackTrace();}}return "執行完畢";}}}