每次我调用这些方法时,都需要14-20ms才能继续。SurfaceHolder.lockCanvas()过于昂贵
Canvas canvas = holder.lockCanvas();
holder.unlockCanvasAndPost(canvas);
这是正常行为吗? 我应该采取不同的方法吗?
这里是整个代码
public class Render extends SurfaceView {
Context c = null;
SurfaceHolder holder;
volatile boolean running = true;
public Render(Context c) {
super(c);
this.c = c;
this.holder = getHolder();
}
public void run() {
if(running) {
if(!holder.getSurface().isValid()){
System.out.println("not valid");
return;
}
Canvas canvas = holder.lockCanvas();
holder.unlockCanvasAndPost(canvas);
}
}
}
跟踪:
01-05 15:49:20.322:I /的System.out(4892):帧时间:0毫秒frame291
01- 05 15:49:20.322:I/System.out(4892):无效
01-05 15:49:20.322:I/System.out(4892):帧时间:0毫秒frame292
01-05 15 :49:20.332:I/System.out(4892):帧时间:2 ms frame293
01-05 15:49:20.357: I/System.out(4892):帧时间:22 ms frame294
01-05 15:49:20.357:I/System.out(4892):帧时间:1 ms frame295
01-05 15:49: 20.362:I/System.out(4892):帧时间:1 ms frame296
01-05 15:49:20.367:D /剪贴板(4892):在开始输入时隐藏剪贴板对话框:由其他人完成......!
01-05 15:49:20.367 I/System.out(4892):Frame time:8 ms frame297
01-05 15:49:20.377:I/System.out(4892):Frame time:10 ms frame298
01-05 15:49:20.397:I/System.out(4892):Frame time:16 ms frame299
01-05 15:49:20.412:I/System.out(4892):Frame time :16毫秒frame300
01-05 15:49:20.427:我/的System.out(4892):帧时间:16毫秒frame301
更新当我使用OpenGL
同样的事情hapens
package android.apps.td;
import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.opengles.GL10;
import android.content.Context;
import android.opengl.GLSurfaceView;
import android.opengl.GLSurfaceView.Renderer;
public class Render extends GLSurfaceView implements Renderer {
private final int MILLION = 1000000;
private long frame;
public Render(Context context) {
super(context);
setRenderer(this);
// TODO Auto-generated constructor stub
}
public void onDrawFrame(GL10 arg0) {
System.out.println("Frame "+(System.nanoTime()-frame)/MILLION+" ms");
frame = System.nanoTime();
}
public void onSurfaceChanged(GL10 gl, int width, int height) {
System.out.println("Surface changed w:"+width+" h:"+height);
}
public void onSurfaceCreated(GL10 gl, EGLConfig config) {
System.out.println("Surface created");
}
}
你在做什么? – dbryson 2012-01-05 00:56:21
没有什么,只是调用这两种方法会产生延迟。 – jellyfication 2012-01-05 13:58:51