GarciaPL Notes - Java and Others

I would like to publish a very useful snipper of code to create cron service in your Android app. Of course you might use some libraries created by other developers. A lot of them might be found on site called Android Arsenal [1] which also I would like to recommend for developers who are looking for libraries.

So, First of all you need to create Handler [2] object which allows you to send and process Runnable objects. This object has a lot of methods which might help you to define expected behavior of your code. This time I will use method postDelayed which allows to execute some Runnable with delay.

private Handler handler = new Handler();

Runnable networkReceiverTask = new Runnable() {
        @Override
        public void run() {
            //execute here method with given delay
            handler.postDelayed(networkReceiverTask, 15000);
        }
    };

Some of you might be looking for some solution to display progress loading dialog. I have used below example it in one of my Android application compiled against API 23 (Android 6.0). That's why on first glance you might think that style theme which I used in this case is overloaded. You need just to adjust it to your own purposes.

<style name="LoadingDialogTheme">
    <item name="colorAccent">#1976D2</item>
    <item name="android:textColor">#1976D2</item>
    <item name="android:textColorPrimary">#1976D2</item>
    <item name="android:textColorSecondary">#1976D2</item>
    <item name="android:windowFrame">@null</item>
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:windowIsFloating">true</item>
    <item name="android:windowContentOverlay">@null</item>
    <item name="android:windowTitleStyle">@null</item>
    <item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item>
    <item name="android:windowSoftInputMode">stateUnspecified|adjustPan</item>
    <item name="android:backgroundDimEnabled">false</item>
    <item name="android:background">@android:color/transparent</item>
</style>

ProgressDialog progressDialog = new ProgressDialog(MainActivity.this, R.style.LoadingDialogTheme);
progressDialog.setMessage(getString(R.string.dialog_loading_content));
progressDialog.setCancelable(false);
progressDialog.setCanceledOnTouchOutside(true);
progressDialog.show();