Android

This class is mainly used to display an image button that can be clicked by users. Android: src and setImageResource () of the XML element of can be used to specify the image to be displayed by the button. By default, it is a normal button, so you

Android contains SQLite, which is commonly used in embedded systems, saving developers from porting and installing it themselves. SQLite supports most SQL92 standards, and many commonly used SQL commands can be used on SQLite. In addition, Android

To implement tree menus in Android, you can use ExpandableList (or you can inherit ListView or LinearLayout by yourself). However, ExpandableList can only implement two levels of tree menus ...... this article still uses ExpandableList, but the

Through the above analysis, we can know that the LOGO image is in the RLE-encoded 565 format, that is, the travel encoding is used, and the color digits are 16 bits (Red Five bits, green 6 bits, Blue 5 bits ). Therefore, the format of all other

Next we will analyze the 565 algorithm with jitter conversion: Void to_565_raw_dither (int width) { Unsigned char in [3]; Unsigned short out; Int I = 0; Int e; Create an array for saving the error of two points. Int * error = malloc (width + 2) * 3 *

In the init. rc file, the first initialized service is the sh Service, as follows: # Daemon processes to be run by init. ## Service console/system/bin/sh Console   THE sh service is a console service. In fact, it is transplanted from NetBSD, so its

In the init. rc file, you can see the following services loaded: Service media/system/bin/mediaserver User media Group system audio camera graphics inet net_bt net_bt_admin The mediaserver service code is in the

Those who have used Android, especially the cottage pad, should be impressed with the restart of Android. Due to the complexity of its design, Android may cause the system to go into an abnormal state inadvertently. Therefore, Android designs a set

For example, if you run the program on the simulator, you cannot see any display on the screen. This is because TouchPaint in this example is used to process onTouchEvent, to detect the pressure of the touch screen and the objects in the contact

I. Different layout The screen sizes of Android mobile phones vary by 480x320,640x360,800 x. How can an App automatically adapt to different screens?In fact, it is very simple, just need to create different layout folder under the res directory,

First, let's take a look at the effect:The first two are Netease's, and the title cannot be dragged ,. However, clicking an animation has a good effect. You need to learn it. The next two are from Sohu. It has a good effect. (check the title) You

Bitmap is the most commonly used resource in our development. After all, a beautiful interface is the most attractive to users. Bitmap operations are divided into the following functions:Retrieve bitmap from resourceObtain bitmap InformationDisplay

Package com. wirelessqa. helper; Import java. io. FileInputStream;Import java. io. FileOutputStream;Import java. io. InputStream; Import org. apache. http. util. EncodingUtils; Import android. app. Activity; Public class FileAccess extends Activity {

--- XmlAndroid: layout_width = "fill_parent"Android: layout_height = "wrap_content"Android: orientation = "vertical"> Android: layout_width = "fill_parent"Android: layout_height = "wrap_content"Android: gravity = "center"Android: orientation =

Note content:Use Intent to redirect between activitiesUse Intent to transfer data during Activity redirectKnowledge focus:Achieve redirectionWhen writing an Android app, you usually need to jump between several activities. Intent objects can be used

LayoutAnimationController is used to add an animation effect to a child view in layout or viewgroup. Each element in Layout uses the same animation effect, but the start time is different. The default start time of a child View animation is to

AnimationOrder: the order of enumerative Layout subviews. It can be normal (forward), reverse (reverse), or random (random order ). The preceding example shows the case table items in ListView in reverse order. In this example, the icon items of the

Apk signature method for android 1.5 and later versions1. Open Eclipse-> select the project you want to sign-> right-click-> android tools-> Export signed Application package 2. Next3. Select the keystore selection of the signature file. If the

I recently found a problem in a small program for making an alarm. This problem is not found on the internet, and finally the answer is found in the source code of the alarm. I believe many people have encountered such problems like me. After you

After watching the sundy video, I have some knowledge of Linux Kernel and Android. Are you ready to compile the Android source code? I am always used to using Windows, but Android source code does not support compiling on Windows. Therefore, I