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The Android Application Framework Broadcast receivers are communication components that receive messages that are sent between the Android operating system and other application components, or betwe

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent"> <SlidingDrawer android:id="@+id/drawer" androi

An Overview of Android Content Providers An Android content provider provides you with access to sharable data structures commonly called databases.The basic procedure is as follows: 1. Get perm

（1）ImageButton button1.xml activity_main.xml <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layo

android.graphics.drawable bitmap is collection of pixels,shape is collection of line drawings.Android supports three bitmap image file formats: PNG, JPEG, and GIF. Truecolor PNG32 images use a full

Handling UI Events via the View Class An event listener is a Java interface in the View class that contains a single callback method to handle that type of user-input event. When you implement a spec

What Is an Intent?  Three types:activities, services, and broadcast receivers. Intents can be passed to other applications written by other programmers, allowing them to be connected as modules of e