Progress bar while start activity

Question

In this code i want to use a ring progressdialog for open and loading each activity.

My code not work well. In my code, progressbar closed and activity open after long time.

I want to add a progressdialog in onListItemClick, plz help me

public class Listsoti extends ListActivity {

String[] str = {"1","2","3","4","5","6","7","8","9","10","11","12","13","14"};
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.listview);

    TextView list = (TextView) findViewById(R.id.hamid);
    PersianReshape.ReshapeTextview(list, "hamid1.ttf", Listsoti.this);
    setListAdapter(new MyAdapter(this,
            android.R.layout.simple_list_item_1,R.id.textView1, str));
}

private class MyAdapter extends ArrayAdapter<String>{

    public MyAdapter(Context context, int resource, int textViewResourceId,
            String[] strings) {
        super(context, resource, textViewResourceId, strings);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        View row = inflater.inflate(R.layout.listsoti, parent, false);
        String[] items = getResources().getStringArray(R.array.contor);

        ImageView iv = (ImageView) row.findViewById(R.id.imageView1);
        TextView tv = (TextView) row.findViewById(R.id.textView1);
        PersianReshape.ReshapeTextview(tv,"hamid1.ttf", Listsoti.this);
        tv.setText(items[position]);

        switch (position) {
        case 0:
           iv.setImageResource(R.drawable.dozdeh);
           break;
        case 1:
            iv.setImageResource(R.drawable.download);
            break;
        default:
            break;
        }
        return row;
    }
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
    Toast.makeText(this, str[position] +" your choose", Toast.LENGTH_LONG).show();
    switch (position) {
    case 0:
        startActivity(new Intent(Listsoti.this, Play.class));

        break;
    case 1:
        final Dialog dialog = new Dialog(this);

        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE); 
        dialog.setContentView(R.layout.progressdialog);
        dialog.show();
        startActivity(new Intent(Listsoti.this, Play.class));


        break;
    default:
        break;
        }
}

EDIT, loading class

public class LoadingScreenActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
System.out.println("LoadingScreenActivity  screen started");
setContentView(R.layout.loading_screen);
Spinner s = (Spinner) findViewById(R.id.mainSpinner1);
s.setVisibility(View.VISIBLE);
//do work if needed and then launch new activity
Intent mainIntent = new Intent(LoadingScreenActivity.this,Play.class); 
    LoadingScreenActivity.this.startActivity(mainIntent); 
    LoadingScreenActivity.this.finish(); 
}

}

Answer 1

You can use this example, this is LoadingActivity, which you create every time you need to show ProgressDialog'. You can customize it by passing activity name throughIntentwhich is gonna be launched next. So you will be able to reuse thisActivity` many times. Check it, please.

1. Create a LoadingScreen layout file

Here you create an screen which just shows loading text and an progress bar loading_screen.xml

<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"    android:gravity="center" android:orientation="vertical"
  android:layout_height="fill_parent" android:background="#E5E5E5">

   <TextView android:text="Please wait while your data gets loaded..."
        android:layout_width="wrap_content" android:layout_height="wrap_content"
        android:textColor="#000000">
   </TextView>
  <ProgressBar android:id="@+id/mainSpinner1" android:layout_gravity="center" 
            android:layout_width="wrap_content" android:layout_height="wrap_content"
            android:indeterminate="true" 
            style="?android:attr/progressBarStyleInverse">
   </ProgressBar>

</LinearLayout>

2. Create a LoadingScreen class file

and in LoadingScreenActivity.class you override onCreate as usually:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    System.out.println("LoadingScreenActivity  screen started");
    setContentView(R.layout.loading_screen);

    Spinner s = findViewById(R.id.mainSpinner1);
    s.setVisibility(View.VISIBLE);

    //do work if needed and then launch new activity
    Intent mainIntent = new Intent(LoadingScreenActivity.this,ProfileData.class); 
    LoadingScreenActivity.this.startActivity(mainIntent); 
    LoadingScreenActivity.this.finish(); 
}

This will load the next activity once your custom task is finished. 3. Open LoadingScreenActivity from say your List from onListItemClick event

Create an intent to launch loading screen activity

protected void onListItemClick(ListView l, View v, int position, long id) {
    super.onListItemClick(l, v, position, id);

    Intent intent = new Intent(ProfileList.this, LoadingScreenActivity.class);
    startActivity(intent);
}

UPDATE

For case to launch LoadingActivity by clicking button you should simply add this code to your current activity:

yourButton.setOnCLickListener(new OnCLickListener(){
   @Override
   public void onCLick(View view){
      Intent intent = new Intent(this, LoadingScreenActivity.class);
            startActivity(intent);
   }
}

Create dialog inside Play.class in method onCreate()

Dialog dialog = new Dialog(this);

dialog.requestWindowFeature(Window.FEATURE_NO_TITLE); 
dialog.setContentView(R.layout.progressdialog);
dialog.show();

then initialize loading file and when loading is done, call this method dialog.dismiss(); and continue working.