Accelerate image rotation in your game for Android bitmap and canvas

Protected void ondraw (canvas) { Bitmap bitmap = bitmapfactory. decoderesource (this. getresources (), R. drawable. ms_canvas); canvas. drawcolor (color. black); matrix = new matrix (); matrix. postrotate (90, 10 + bitmap. getwidth ()/2, 10 +

Android Data Storage

1. sharedpreferences: used to store data in the "key-Value Pair res" format. It is a lightweight key-value storage mechanism that can only store basic data types.2. File Storage: operations on files are performed through fileinputstream and

Description on partitions of Android Rom

 1. View partition information ADB Shell Su # obtain root permissions CAT/proc/MTD view partition information Dev: Size erasesize nameMtd0: 00040000 00020000 "preloader"Mtd1: 000c00000 00020000 "dsp_bl"Mtd2: 00300000 00020000 "NVRAM"Mtd3: 0

Android SQL Execution length limit

When I was working on the project today, I encountered the following problem:When an SQL statement is executed in the project, an error is returned, indicating that the column M. ID is not displayed.SQL statement: Select distinct M. [ID], M. [book_

Livefolders for Android Study Notes

Package = "King. Demo" Android: versioncode = "1" Android: versionname = "1.0" type = "codeph" text = "/codeph"> Android: Label = "@ string/app_name"> Package king. Demo; Import Android. R. anim;Import Android. App. activity;Import

Android queries the SMS Database

Field descriptions of common android Databases1. SMS DatabaseString struriinbox = "content: // SMS ";Uri urisms = URI. parse (struriinbox );Cursor c_groups = managedquery (urisms, new string [] {"date", "person"}, select, null, "date DESC

Precautions for Android intent to start Activity

The program written in the past few days needs to use intent to call startactivity to start other activities. A common error occurs: activity does not exist. There are two main reasons: 1. androidmanifest. xml action in the started activity must

Android mediaplayer prepare

The prepare process of Android mediaplayer has many actions, such as demuxer and find codec. If it takes a long time, ANR will appear. The Android system will check whether the main thread has a response in five seconds, if not, an error message is

Complete APK compilation for Android 4.0

After downloading the android 4.0 code, the gallery in the simulator is not 3D. I want to compile the gallery2 with MMM, but the out directory contains APK and odex to speed up the operation, we split Dex for preprocessing, but I want to install a

Android mediaplayer Scaling

The surfaceview size of the default player in the Android system is regarded as good at the beginning and cannot be changed. To enable full-screen playback, You need to inherit the videoview class to expand the function. This is mainly the onmeasure

Translate a series of articles about android game development-1-the game idea

Find an example of a very good androidgame layout at http://obviam.net/index.php/step-1-the-game-idea /.   First translate the first article the game idea This is the most difficult part. Because of my limited time, I have to choose an idea that can

4-displaying images with Android

Document directory Mobile graphics Before starting the actual game loop, let's first display some pictures so that we can get some dimensional concepts (not quite clear about what this sentence means ). If you haven't seen the content on the

Analysis of [Frame Rate display] of the Android Application FPS meter -- Talking about the root risk (2)

Document directory Ptrace call Call details Summary After the application has been started in the previous section, the root permission will be obtained and/data/COM will be executed through the shell class of the roottools library. aatt.

Precautions for making an animation for the android switch on/off Machine

1,File Name We recommend that you name more than 10 images. A1 ~ A9 B1 ~ B9 ....... 2,We recommend that you use the VI tool to modify desc.txt. Desc.txt File Analysis:480 427 30Number of frames in width and heightP 1 0 part0The directory name

Android SDK update error Solution

The SDK cannot be updated frequently. The following log Fetching https://dl-ssl.google.com/android/repository/addons_list-1.xmlFailed to fetch URL https://dl-ssl.google.com/android/repository/addons_list-1.xml,Reason: stub!Fetched add-ons list

Android statusbar: Add back, home, and menu buttons

Add the home, back, and menu menus to the system status bar on the android interface and complete the corresponding system functions. And the higlight effect is displayed. Modify the height of the status bar and the text size on the status bar. This

Android static images and dynamic wallpapers

[Android version] 6573 Android v2.3 6575 Android v2.3/v4.0 [Description] How to customize the default wallpaper for the first boot. [Solution] The default Wallpaper can be set to an image or a dynamic wallpaper. Static Wallpaper Android

Android touch screen correction

I have been working on touch screen correction for Android recently. I want to write down my experience and share it with you. Note: Debugging usesResearch Technology (www.gz weiyan.com) 210 Development BoardAndroid 2.2, kernel 2.6.32 1. Modify the

Android Design Pattern Builder

  Application 1: 1. Code: In brosweractivity. Java, you have created a webviewclient. The Code is as follows:   Private Final webviewclient mwebviewclient = new webviewclient (){ ...... /** * Displays SSL error (s) dialog to the user. */ @

Error message when compiling a separate module for Android

Lqm @ lqm :~ /Android_gingerbread $ make ledtestapp ================================== ========= response = relplatform_version = 2.3.1target _ Product = metric = engtarget_simulator = target_build_type = metric = target_arch = armhost_arch = metric

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