SurfaceView 連續渲染 SurfaceHolder   Canvas

Canvas canvas = holder.lockCanvas();
canvas.drawRGB(255, 0, 0);
holder.unlockCanvasAndPost(canvas);

第一行，鎖定Surface用于渲染并返回一個可用的Canvas

第二行，解鎖Surface并確保通過Canvas進行繪制的內容可顯示到屏幕上

例子：

import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.graphics.Canvas;
import android.view.Menu;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
public class MainActivity extends Activity {
      
    FastRenderView renderView;
      
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        renderView = new FastRenderView(this);
        setContentView(renderView);
    }
    protected void onResume() {//重載
        super.onResume();
        renderView.resume();
    }
    class FastRenderView extends SurfaceView implements Runnable
    {
        Thread renderThread = null;
        SurfaceHolder holder = null;
        volatile boolean running = false;
        public FastRenderView(Context context) {
            super(context);
            holder = getHolder();
        }
        public void resume()//自定義
        {
            running = true;
            renderThread.start();
        }
        public void run()
        {
            while(running)
            {
                if(!holder.getSurface().isValid())
                    continue;
                Canvas canvas = holder.lockCanvas();
                canvas.drawRGB(255, 0, 0);
                holder.unlockCanvasAndPost(canvas);
            }
        }
        public void pause()//自定義
        {
            running = false;
            while(true)
            {
                try {
                    renderThread.join();
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}