Create slideshow without mouselistener
I am new in android and I want to create slideshow without any listener, I mean I would like open my app and see just animation wi开发者_如何学JAVAth effect. I can't find examples or tutorials, anyone could help me? Thanks
If you want to do anything automatically without user interaction, than you have to use a backgroud thread. In Android you cannot call methods modifying the UI fron a background thread. As you plan on periodically updating the UI, you will be best off with AsynchTash.
private class SwitchImagesTask extends AsyncTask<Integer, Integer, Intehger> {
protected Long doInBackground(Integer... itemCount) {
for (int i = 0; i < itemCount[0]; i++) {
try{Thread.wait(1000);}catch(Exception e) {return -1;}
publishProgress(i);
}
return 1;
}
protected void onProgressUpdate(Integer... progress) {
// Display your image here
}
protected void onPostExecute(Integer result) {
// Say goodby to the user
}
}
If slide show means one image after another, than the easiest way to do this will be to add an ImageView to the layout, and change it's content.
if you call a activity, you can use layout inflator in inner class which extends thread.
public class SlideshowActivity extends Activity {
private static final int[] mSlides = new int[]{R.layout.layout_a , R.layout.layout_b , R.layout.layout_c};
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
new StartSlideShow().start();
}
class StartSlideShow extends Thread
{
@Override
public void run() {
LayoutInflater inflator = SlideshowActivity.this.getLayoutInflater();
for(int inx = 0 ; inx < mSlides.length ; inx++)
{
try {
sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
inflator.inflate(mSlides[inx], null);
}
}
}
}
精彩评论