然后我们再继承SurfaceHolder.Callback 这个接口 ，这样我们的GameCanvas类要实现其几个方法 1 public void surfaceCreated(SurfaceHolder...holder) {} 3 public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {} 我们在surfaceCreated...暂且先不讨论它，后面你会明白他有什么用了， 声明一个SurfaceHolder handle对象，然后在surfaceCreated（）方法里面初始化它 如下： handle = this.getHolder...paint.setColor(Cloor.red)； canvas.drawText("Andoid GameCanvas",100,100,paint)； } @Override public void surfaceCreated
image.png 在FlutterSurfaceView中，这个类继承至SurfaceView，实现了RenderSurface接口，在通过调用FlutterRenderer的surfaceCreated...方法，最终会调用到flutterJNI的surfaceCreated，最终通过调用nativeSurfaceCreated方法和nativePlatformViewId产生了关联，以下是源码部分。...= null) { this.flutterRenderer.surfaceCreated(this.getHolder().getSurface()); } else...方法 public void surfaceCreated(@NonNull Surface surface) { this.flutterJNI.onSurfaceCreated(surface...NonNull SurfaceHolder holder) { Log.v("FlutterSurfaceView", "SurfaceHolder.Callback.surfaceCreated
int width, int height) { // TODO Auto-generated method stub } @Override public void surfaceCreated...int width, int height) { // TODO Auto-generated method stub } @Override public void surfaceCreated...在surfaceCreated方法中调用处理绘图线程，并将holder对象传递给绘图线程 4.
解决方案二： What probably happened is that you created a thread in the surfaceCreated...public void surfaceCreated(SurfaceHolder holder) { if (_thread == null || _thread.getState() == Thread.State.TERMINATED
根据当前旋转的角度修改生成图像的角度 记得当时有三个重写的参数surfaceCreated,surfaceChanged和surfaceDestoryed，其中我们在surfaceCreated中加入了打开...SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); //保持屏幕常亮 holder.setKeepScreenOn(true); } @Override public void surfaceCreated
created for you while the SurfaceView's window is visible; you should implement SurfaceHolder.Callback#surfaceCreated...drawing thread only touches the underlying Surface while it is valid -- between SurfaceHolder.Callback.surfaceCreated
在surfaceCreated中生成一个Thread来不断地调用draw函数，同时初始化玩家机型。另外设置接口。这个需要MainActivity来管理。...arg0) { flag = false; } @Override public void surfaceCreated
} private class CustomCallBack implements Callback { @Override public void surfaceCreated...try { initCamera(); } catch (IOException e) { Log.d(TAG, "surfaceCreated...surfaceDestroyed(SurfaceHolder holder) { } @Override public void surfaceCreated...mPosition = 0; } catch (Exception e) { Log.d(TAG, "surfaceCreated
如果你要查看 surface被创建和销毁的时机，可以重载surfaceCreated(SurfaceHolder)和 surfaceDestroyed(SurfaceHolder)。...2> 由于surface可能被销毁，它只在SurfaceHolder.Callback.surfaceCreated()和 SurfaceHolder.Callback.surfaceDestroyed...the one running its [SurfaceView], you will want to carefully read the [lockCanvas()] and [Callback.surfaceCreated
Runnable接口，需要重写以下方法 /** * SurfaceView创建 * @param holder */ @Override public void surfaceCreated...绘制的时候，充分利用SurfaceView的三个回调方法，在surfaceCreated方法中开启子线程进行绘制， 而子线程使用一个while(mIsDrawing)的循环来不停的绘制，并通过unlockCanvasAndPost...} /** * SurfaceView创建 * * @param holder */ @Override public void surfaceCreated...设置转弯处为圆角 mPaint.setStrokeJoin(Paint.Join.ROUND);//结合处为圆角 } @Override public void surfaceCreated...} /** * SurfaceView创建 * * @param holder */ @Override public void surfaceCreated
而刚才生成的三个方法中，我们要在SurfaceCreated中加入开户摄像机的方法，在SurfaceDestroyed加入关闭摄像机的方法 ? 开启摄像机 ? ? 关闭摄像机 ?...SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); //保持屏幕常亮 holder.setKeepScreenOn(true); } @Override public void surfaceCreated
发生在表面的事件和变化 我们实现这两个接口,会得到如下几个方法 OnPreviewFrame(),来自于Android.Hardware.Camera.IPreviewCallback SurfaceChanged() SurfaceCreated...首先来实现 SurfaceCreated(),代码如下(注:这里是重点): 1 public void SurfaceCreated(ISurfaceHolder holder) 2
SurfaceView 声明周期对应 : SurfaceView 可见的时候 Surface 被创建, SurfaceView 不可见时 Surface 销毁, Surface 创建销毁时机回调方法 SurfaceCreated...(SurfaceHolder arg0) { System.out.println("SurfaceHolder.Callback.surfaceCreated : Surface 开始创建");...Callback 接口对应的 Surface 边界 : surfaceCreated() 方法在开始绘制时回调, surfaceDestroyed() 在 Surface 销毁前回调; * 3....该接口中的方法 : * -- surfaceChanged() : 在 Surface 大小改变时回调; * -- surfaceCreated() : 在 Surface 创建时回调...(SurfaceHolder arg0) { System.out.println("SurfaceHolder.Callback.surfaceCreated : Surface 开始创建");
上面的回调类是我们自己定义的，代码如下 private class SurfaceCallback implementsSurfaceHolder.Callback{ @Override public void surfaceCreated...(),另外一个是TakePictureCallback()，初学者可能一时难以理解，通俗地讲，前者是用来监视surficeView这个暂时存放图片数据的显示控件的，根据它的显示情况调用不同的方法，包括surfaceCreated
= 0 private val speedX = 5 init { holder.addCallback(this) } override fun surfaceCreated...在 surfaceCreated() 方法中启动了一个线程，该线程在独立的表面上绘制一个移动的矩形。 5.
surfaceChanged(SurfaceHolder holder,int format,int width,int height){} //在surface的大小发生改变时激发 public void surfaceCreated..., int height) { // TODO Auto-generated method stub } @Override public void surfaceCreated
如放在构造方法或者onCreate()方法中，都会照成没有预览效果. （3） SurfaceHolder.Callback,这是个holder用来显示surfaceView 数据的接口,他分别必须实现3个方法 surfaceCreated...holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);//设置类型 } @Override public void surfaceCreated...height) { myCamera.startPreview(); } @Override public void surfaceCreated...height) { myCamera.startPreview(); } @Override public void surfaceCreated...; myCamera.startPreview(); } @Override public void surfaceCreated
把画布显示在屏幕上 } /** * 当SurfaceView创建的时候，调用此函数 */ @Override public void surfaceCreated...} } } MySurfaceView首先继承SurfaceView，然后实现Runnable和Callback接口 重写了Runnable的run方法和Callback的surfaceCreated
SurfaceHolder holder, int format, int width,int height){} @Override //当SurfaceView创建时调用 public void surfaceCreated
SurfaceHolder.removeCallback : 移除回调接口Callback 监听器需要重写的方法 : surfaceCreated : 预览创建。...注意SurfaceView的渲染线程只在surfaceCreated和surfaceDestroyed之间有效，所以如果在别处操作SurfaceView画面，得判断当前预览界面是否有效，也就是调用SurfaceHolder.isCreating...} //再次进入预览 mCamera.startPreview(); isPreviewing = true; } }; @Override public void surfaceCreated
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