surfaceholder

Write a homemade background image with Surfaceview, and you can move it, plus the Backgroundmanager class in the Android Aircraft War (a), you can use it directlyGameview Code:public class Gameview extends Surfaceview implements surfaceholder.callback,runnable{Private Surfaceholder Hd=null;Private Canvas Canvas=null;Private Backgroundmanager Backgroundmanager;Public Gameview (Context context) {Super (context);This.setfocusable (TRUE);Hd=this.getholder

permissions, store permissions, and so on in the manifest file.2. Create a preview classUse the Surfaceview control to implement a real-time camera preview screen.Surfaceview is a subclass of view, so it has all the methods and properties of view. At the same time, the extra surface is dedicated to drawing classes.Surfaceview has the following three features: A. 具有独立的绘图表面； B. 需要在宿主窗口上挖一个洞来显示自己； C. 它的UI绘制可以在独立的线程中进行，这样就可以进行复杂的UI绘制，并且不会影响应用程序的主线程响应用户输入。The implementation principle analys

UnY > Sa.screenheight-height) {//down motion head updirection =!updirection;//direction Reverse Runy = Sa.screenheight-height; Stepreduce = (int) (maxheight * reducepercentage); MaxHeight = MaxHeight + stepreduce;//maximum height decrement} if (Runy 　　BallsurfaceviewPackage Com.example.sufacedemo;import Android.annotation.suppresslint;import Android.content.context;import Android.graphics.canvas;import Android.gra

Notoginseng @Override - Public voidsurfacecreated (Surfaceholder holder) { the +Mythread.isrun =true; A Mythread.start (); the } + - /** $ * @paramHolder $ * @paramformat - * @paramwidth - * @paramheight fires when the size of your surface changes the */ - @OverrideWuyi Public voidSurfacechanged (Surfaceholder holder,intFormatintWidthintheight) { the - } Wu

string Key_ Preferences_camera_numbers = "Key_preferences_camera_numbers"; LinearLayout mfloatlayout; Windowmanager.layoutparams Wmparams; WindowManager mwindowmanager;private surfaceview msvpreview;private surfaceholder mSurfaceHolder;private Camera Mcamera;private Parameters mparameters;private static final int default_camera_id = Camerainfo.camera_facing_back; private static int mcameraid = default_camera_id;private static int mcameranumbers;priva

object surfaceholder = surfaceview. getholder (); // obtain the surfaceholder object canvas = surfaceholder. lockcanvas (); // obtain the canvas object // draw surfaceholder. unlockcanvasandpost (canvas); // release the canvas lock and display the view 2. In other cases, we need to create a canvas object through code

Document directory Main. xml Surfaceview is a very important drawing container because it can directly obtain image data from hardware interfaces such as memory or DMA. There are many usage of surfaceview on the Internet, and the writing method is also different, for example, surfaceview class or surfaceholder class. callback class, which can be selected based on actual functional needs. I will call the lockcanvas and unlockcanvasandpost of

(surfaceholder. surface_type_push_buffers); surfaceview. getholder (). setfixedsize (200,200); surfaceview. getholder (). addcallback (New surfacevi Ewcallback ();/*** seekbar is used to implement zoom logic */mseekbar = (seekbar) findviewbyid (R. id. seekbar); mseekbar. setonseekbarchangelistener (New seekbar. onseekbarchangelistener () {@ overridepublic void onprogresschanged (seekbar, int progress, Boolean fromuser) {// todo auto-generated method

classes, such as bitmapdrawable, shapedrawable, and layerdrawable. The above is taken from hellogv's "picture of Android getting started 14th" Let's make a simple example: Paint is the paint brush. Bitmap is the canvas. Canvas is a painter. Therefore, a painter can draw any painting on the canvas through a paint brush. Two Use Cases of canvas: 1. Get the canvas object from the custom view and the custom surfaceview. Because the custom view and surfaceview have obtained the display area in

data. @Override public void onPictureTaken(byte[] data, Camera camera) One thing to pay attention to here is that the Camera preview interface will stop after shooting, because it stops focusing. We need to reset auto focus and enable preview. // Refresh the camera public void refreshCamera () {if (surfaceHolder. getSurface () = null) {// preview surface does not exist return;} // stop preview before making changes try {mCamera. stopPreview

; import android. view. surfaceHolder; import android. view. surfaceView; public class MainActivity extends Activity implements SurfaceHolder. callback {private Camera mCamera; private SurfaceHolder mHolder; private SurfaceView surface_view; private image1_callback; private Handler autoFocusHandler; private SyncDecode asyncDecode; @ Overrideprotected void onCreat

You can use custom controls (such as buttons) to customize a SurfaceView. For example, a dynamic graph (custom) or a toolbar similar to that in the UC browser. Example: Custom class code: Copy codeThe Code is as follows: public class ImageSurfaceView extends SurfaceView implements Callback { // Used to control SurfaceView Private SurfaceHolder sfh; Private Handler handler = new Handler (); Private ImageRunnable imageRunnable = new ImageRunnable ();

maintain its own buffer, but waits for the rendering engine of the screen to push the content to the user */surfaceView. g EtHolder (). addCallback (new SurfaceCallback ();} // The button listens to private final class ButtonClickingListener implements View. OnClickListener {@ Override public void onClick (View v) {if (! Environment. getExternalStorageState (). equals (Environment. MEDIA_MOUNTED) {Toast. makeText (CameraActivity. this, R. string. sdcarderror, 1 ). show (); return;} try {switch

), it should be changed to return true because:(1) The ontouchevent (event) method of the parent class may not be processed, but false is returned.(2) If false is returned, the motionevent. action_move and motionevent. action_up events will no longer be received in this method. 4. About suifaceview plotting: access to the underlying surface is provided via the surfaceholder interface, which can be retrieved by callingGetholder (). Use the getholde

In a recent project, there is a playback list interface, similar to Youku's playback interface, which is a player and a playlist, A headache occurs: if the current video is playing, you cannot load the video of this item when you click the playlist. You need to click this item again to switch the video playback. That is to say, the biggest difference between my app and Youku is that I have to double-click to play the video in the video list. This problem has been bothering me for two weeks. Toda

, videoheight); Msurfaceholder.settype (surfaceholder.surface_type_push_buffers); Msurfaceholder.addcallback (this); Step2: Method of implementing the interface, surfacecreated the preview of the video in the method, destroying in the surfacedestroyed //Surfaceview callback //////////////////////////////////////// @Override public void surfacecreated (Surfaceholder holder) { msurfaceholder = holder; Startpreview (holder); } @Overrid

Customize a Surfaceview for use with custom controls, such as buttons. such as a piece of dynamic diagram (custom appropriate), or similar to the UC browser toolbar below. The following diagram example： Custom Class Code： Copy Code code as follows: public class Imagesurfaceview extends Surfaceview implements callback{ Used to control Surfaceview Private Surfaceholder SFH; Private Handler Handler = new Handler (); Private imagerunn

). Settitle (R.string.device_not_support_title). Setpositivebutton (R.string.ok, New Dialo Ginterface.onclicklistener () {@Override public void OnClick (Dialoginterface dialog, int which) { Dialog.dismiss (); Finish (); ). Create (). Show (); Private Boolean isflashsupported () {Packagemanager pm = GEtpackagemanager (); Return Pm.hassystemfeature (Packagemanager.feature_camera_flash); public static class Flashlightfragment extends Fragment implements Surface

Maybe some students do not understand, why should the picture reversal (not rotating OH), we are in the game development, in order to save the picture resources (space) may use to the picture inversion, for example, a character picture, facing the left, or right, if can not realize the picture inversion case, will need two pictures, the nonsense says less, See the effect on the code: In the figure above, the actual two characters are using a picture, which is only handled for a single image.D

The main class of Android game development is display class except control class, and it is very important and complicated to display and game logic processing. Display and canvas can be implemented in J2ME, and the view class is displayed in Android. Here is a brief introduction to Android.view.View and Android.view.SurfaceView. Surfaceview is a display class derived from the view base class, and the direct subclass has Glsurfaceview and Videoview to see how the GL and video playback and camer