执行大型方法时在android中显示进度对话框

Question

I have a long running method that is called during onCreate, this method populates textviews so interacts with the UI, and updates maybe 70 labels (about 3-20 seconds depending on device).

I want to display a progressdialog as this method executes.

Ideally I want to fire my method on the UI thread once the Activity has been displayed and the progress is displayed, this I cannot do, the Activity won't paint until the method has finished.

I hoped to find an event which was fired after the activity was displayed, and I found the one below, but it still leaves the screen black until the method has finished.

@Override public void onPostCreate(Bundle savedInstanceState)

I am normally a WP7 developer, and in .NET you add an event handler for onLoadComplete which is fired after the ui is displayed, but before the user has a chance to interact withthe UI, how do I do this in Android JAVA?

Thanks

Answer 1

Put a ProgressBar in the View.

Then in the onCreate() or onResume() method do this:

new Thread() {
    public void run() {
        yourLargeMethod();
    }
}.start();

Now you can do this inside your method to update the progressBar

public void yourLargeMethod() {
// doSomething
...

runOnUiThread(new Runnable() {
        public void run() {
            // update the progress from the thread
            progressBar.setProgress(x); // x is your progress, 0 <= x <= progressBar.getMax()
        }
    });
}