Android Experience
This is my android development diary. I'm new to android development so here I'm publishing all my experience, solutions, knowledge base etc...
Tuesday, May 31, 2011
Scrollable layout in Android
It's piece of cake :)
Tuesday, May 3, 2011
Checkout my first applications
Simple widget that show your battery charge level, voltage an temperature styled as small battery.
Small version of android 3.0 build in clock widget ported to 2.x.
Friday, April 15, 2011
Drawing on widget canvas
There are a lot of examples about android canvas. But how to be if we want to draw something in our widget?
Here is simple example how to do this using RemoteViews.
Than we can use android canvas methods to draw all we want.
Have a nice code!
Here is simple example how to do this using RemoteViews.
//create a remote view from widget layout RemoteViews views = new RemoteViews(context.getApplicationContext().getPackageName(), R.layout.widget_layout); //create a bitmap bitmap = Bitmap.createBitmap(100, 100, Config.ARGB_8888); //create a canvas from existant bitmap that will be used for drawing Canvas canvas = new Canvas(bitmap);
Than we can use android canvas methods to draw all we want.
//create new paint Paint p = new Paint(); p.setAntiAlias(true); p.setColor(hands_color); p.setStyle(Paint.Style.STROKE); p.setStrokeWidth(2); //draw circle canvas.drawCircle(50, 50, 7, p); //set our bitmap to view views.setImageViewBitmap(R.id.imageView, bitmap);
Have a nice code!
Sunday, April 3, 2011
Registering a broadcast receiver from widget
A broadcast receiver is a class which extends "BroadcastReceiver" and which is registered as a receiver in an Android Application via the AndroidManifest.xml or via code.
BroadcastReceiver registration is quite simple for and application. This example will show you how to register it from widget.
Es an example we will register receiver for ACTION_TIME_TICK intent.
We do not need to register it on AndroidManifest.xml because ACTION_TIME_TICK intent can't be registered in manifest.
First of all you need to create a BroadcastReceiver class instance.
Register our receiver in WidgetProvider class onUpdate method.
The main point of this example that we are using a context.getApplicationContext() method to get a context instead of context that passed to onUpdate()
Have a nice code!
BroadcastReceiver registration is quite simple for and application. This example will show you how to register it from widget.
Es an example we will register receiver for ACTION_TIME_TICK intent.
We do not need to register it on AndroidManifest.xml because ACTION_TIME_TICK intent can't be registered in manifest.
First of all you need to create a BroadcastReceiver class instance.
private BroadcastReceiver HelloReceiver = new BroadcastReceiver(){ @Override public void onReceive(Context context, Intent intent) { //do something on receive } };
Register our receiver in WidgetProvider class onUpdate method.
@Override public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetId) { context.getApplicationContext().registerReceiver(this.HelloReceiver, new IntentFilter(Intent.ACTION_TIME_TICK)); //do other actions such as update widget... }
The main point of this example that we are using a context.getApplicationContext() method to get a context instead of context that passed to onUpdate()
Have a nice code!
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