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android.view.TextureView

TextureView.lockCanvas

Top / TextureView.lockCanvas

メモ

• It is important to note that only one producer can use the TextureView. For instance, if you use a TextureView to display the camera preview, you cannot use TextureView.lockCanvas() to draw onto the TextureView at the same time.

例

• public class hoge extends TextureView implements TextureView.SurfaceTextureListener,Runnable{
      @Override
      public void onSurfaceTextureAvailable(SurfaceTexture surface,int width,int height) {
          //スレッドの開始
          thread=new Thread(this);
          thread.start();
      }
  
      public void run() {
          while(thread!=null) {
              long currentTime=System.currentTimeMillis();
              onTick();
              try {
                  Thread.sleep(30-currentTime%30);
              } catch (Exception e) {
              }
          }
      }
  
      //定期処理
      private void onTick() {
          Canvas canvas=lockCanvas();
          if (canvas==null) return;
          canvas.drawColor(Color.WHITE);
          canvas.drawBitmap(image,px-120,py-120,null);
          unlockCanvasAndPost(canvas);
  
      }
  }