Android

Animation is an Animation effect component of android. It can display pages, ListView, and GridView in a brilliant way.  This blog briefly introduces four animation effects: 1. AlphaAnimation controls the gradient and transparent animation effect 2.

This is an article about how RenderScript uses Struct. It is a basic knowledge point to learn RenderScript.Outline1. How to define Struct2. How to get the pointer length and assign values to the pointer cyclically3. Overall DEMO codeHow to define

In the Date and time selection dialog box, you need to obtain the current time first. Here, you can use the Calendar in the java class to obtain the Date and time (Date can also be used, but it is not recommended, the Date method has been commented

Determine whether the current application is the top application: Public static boolean isTopApp (Context context ){ActivityManager activityManager = (ActivityManager) context. GetSystemService (ACTIVITY_SERVICE );List tasks = activityManager.

The previous http://www.bkjia.com/kf/201203/123061.html article introduced the Startup Process of the init process, including parsing init. the rc Script starts many important services based on the Content configuration: The Servicemanager and

Public void addView (View child ){Child. setDrawingCacheEnabled (true );Child. setWillNotCacheDrawing (false );Child. setWillNotDraw (false );Child. buildDrawingCache ();If (child. getDrawingCache () = null) {// TODO Make this work!Log. w ("View",

Displaying a network image in Android is actually super simple. The following is a very simple example:Step 1:1. Create Your Activity, which is described in ViewWebImageActivity in this example;2. The code in ViewWebImageActivity is as

When writing Android programs, we always encounter out of memory errors. Here, I use Gallery as an example. In the simulator, there will be no OOM error. However, once the program is run into the real machine, there will be more than one picture

1. Normal dialog box   [Java] AlertDialog. Builder builder = new Builder (GenContextMenu. this );Builder. setTitle ("title ");Builder. setPositiveButton ("OK", null );Builder. setIcon (android. R. drawable. ic_dialog_info );Builder. setMessage

By default, an activity occupies the entire screen. However, you can set a "dialog box" topic for an activity so that it can be displayed as a floating dialog box. For example, you may want to define your activity as a pop-up "dialog box" to notify

If you like, you can hide the title bar of the Activity. To do this, you only need to use the requestWindowFeature () method and pass the Window. FEATURE_NO_TITLE constant value. [Java]Package net. learn2develop. Activity101; Import android. app.

ListView is a very practical method to load images asynchronously. It is generally better to use this method to obtain image resources through the network, and the user experience is good, so users do not have to wait, the implementation method is

Host: ubuntuTarget: Android ICS 1. Put gdbserver and gdbclient into target and host respectively. Both can be found in the prebuilt directory of the android source code. 2. Start gdbserver on Target and execute$/Path/to/gdbserver: 1111 -- attach

We already know that is used to define how your Activity is enabled by another Activity. This is the so-called "filter ". However, if two activities have the same , what will happen? The code in AndroidManifest. xml. [Java] Package = "net.

Generally, an activity may contain one or more fragment, which work together to form a consistent UI interface. In this case, communication between multiple fragments is very important. For example, an activity contains two fragment items, and the

In Android, The TabActivity class does not have Menu-related methods. Therefore, if you use TabActivity for development, you cannot create Menu items. To add a menu to a Tab, you can use either of the following methods:   1. The main event

The overall architecture is as follows:  Divided into Application Layer Application Framework Layer System runtime layer (c/c ++ Runtime Library and android Runtime Library) Linux Kernel Layer Applications mainly deal with the application

Shows the android project structure:R. java: The read-only file is automatically generated and defines many constants, which are indexes of all resources of the project. You can use this file to quickly find resources in the project and refresh the

Create an Android project with the following code: Main. xml [Html] Android: layout_width = "fill_parent"Android: layout_height = "fill_parent"Android: orientation = "vertical">"Android: text = "click to Activity2"Android: layout_width =

In Android, all sensors must be accessed through SensorMannager, Call the getSystemService (SENSOR_SERVICE) method to obtain the sensor management object of the mobile phone, OnSensorChanged (SensorEvent se) is called when the sensor value is