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After creating the android AVD, you may
August 26 Beijing Time News: According to foreign media reports, according to the android development blog, Google gave up the Bluetooth and gtalkservice instant messaging APIs (applications) in its first mobile phone system, Android 1.0.
Recently, when browsing the listview project, we used to change the color to record the selected rows. After a long time on the Internet for Baidu and Google, we finally combined the online materials with our own practices,
Finally, the function
Because the project involves operations on the bitmap (Android. Graphics. Bitmap), we carefully studied the bitmap functions provided by Android against the android reference documentation.1. Bitmap acquisitionA bitmapfactory class is provided in
Reference: http://www.ibm.com/developerworks/cn/opensource/os-cn-android-anmt1/index.html
Refer to the example in COM. example. Android. APIs. Graphics bitmapdecode. Java in apidemos.Code.
It uses the movie class to read and decode GIF
There are two methods for JS extension in Android:
1. Use the JS extension interface provided by WebKit to expand at the Java layer, which is directly implemented by the appAdvantages: EasyDisadvantage: coupling with the app. Other apps cannot use
Who will think of all kinds of buttons in the webpage when using the button? Do you want to design that effect? The answer is yes. Android is very powerful. However, the first step today is a headache. Everything is from simplicity to simplicity,
## Automatically generated make config: Don't edit#Config_pvk_kernel = yConfig_mobm = yConfig_pvk_blob = yConfig_pvk_cp = yConfig_cpu_tavor = yConfig_wtptp = y
## System type## Config_platform_littleton is not set# Config_platform_zylonite is not
During development, full screen display, custom titles (using buttons and other controls), and other requirements are often required. This requires the most appropriate processing of the title bar.
A very important method is used:
Recently, I encountered the application class in the project. I didn't know how to use it at first. I learned how to use it. For example, if you want to use global variables in the entire application, static variables and public variables are
It's a real fucking comprehensive solution.1. Describe the lifecycle of an activity.2. If the background activity is recycled by the system for some reason, How can I save the current status before being recycled by the system?3. Set an activity as
2,KernelLayerSysfsInterface function Creation
The Code analyzed here is based on Samsung's mobile phone productsI5700. For a device that involves power management, the device driver should add relevant code to support corresponding power management,
What shoshould we do when meet a crash in Android?
Original post address: http://leave001.blog.163.com/blog/static/1626912932011226105512484/
Create a crash
For demonstration purpose, I intentionally created a crash in open_sensors_device of
Original
Http://www.2cto.com/kf/201202/118540.html
Why did you write this article? Some time ago, when studying telephony, we did not find the call to telephony initialization (makedefaphones function in phonefactory. Java) in the framework. The
Document directory
1. multi-thread writing. Use a sqliteopenhelper. This ensures that a sqlitedatabase is used in multiple threads.
2. multi-threaded writing. Multiple sqliteopenhelper may cause an exception during insertion, resulting in an
Webview can load and display webpages as a browser. It uses the WebKit rendering engine to load and display webpages. There are two different ways to achieve webview:Step 1:1. instantiate the webview component in the activity: webview = new webview (
When developing Android and iPhone applications, we often need to push various notification messages from the server to the mobile client in real time, the iPhone already has a relatively simple and perfect push notification solution, but it is
I. Canvas Android. Graphics. Canvas
The canvas class is like drawing paper on a mobile phone. We can draw images or images on a canvas. Generally, when we use Android for painting, four components are required:1. Bitmap: Contains pixels2. Canvas
The program terminates abnormally but does not have any exception information. Only the useful information in the log is captured:
09-19 21:57:02. 222: W/inputdispatcher (153): channel'audio c5958 com. nju. ECG/com.nju.ecg.wav E. wavescreen (server )
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