我正在使用SurfaceView
,我必须尽快更新它。由于没有自动调用onDraw方法,我必须显式调用。所以我的第一次尝试是在线程,但我有一些滞后。还有更好的方法吗?如果有更好的解决方案,请您解释一下吗?我是Android世界的新手!
到目前为止我有什么
public void run() {
while(running){
Canvas c = null;
try {
c = view.getHolder().lockCanvas();
synchronized (view.getHolder()) {
view.onDraw(c);
}
} finally {
if (c != null) {
view.getHolder().unlockCanvasAndPost(c);
}
}
}
}
答案 0 :(得分:0)
这是我用作渲染线程的代码。 fps是根据帧更新的。我通常以30 fps运行我的游戏。 (有一些你不需要的代码,但我是你的父亲,你将能够找到你想要的东西。)
public class RenderView extends SurfaceView implements Runnable {
Game game;
Bitmap gameScreen;
Thread gameloop;
SurfaceHolder holder;
boolean running;
int sleepTime;
int numberOfFramesSkipped;
int maxFrameSkips;
long beginTime;
long endTime;
long lastTime;
int differenceTime;
int framePeriod;
Canvas frameBuffer;
int frameCount;
public RenderView(int fps, int maxFrameSkips) {
super(game);
this.gameScreen = gameScreen;
this.holder = getHolder();
this.framePeriod = 1000/fps;
this.maxFrameSkips = maxFrameSkips;
lastTime = System.currentTimeMillis();
beginTime = System.currentTimeMillis();
}
@Override
public void run() {
while(running == true) {
if(holder.getSurface().isValid()) {
beginTime = System.currentTimeMillis();
// call your update method here
// render here
frameBuffer = holder.lockCanvas();
this.onDraw();
holder.unlockCanvasAndPost(frameBuffer);
// Frame Per Second Count
frameCount++;
if(lastTime + 1000 < System.currentTimeMillis()) {
lastTime = System.currentTimeMillis();
frameCount = 0;
}
endTime = System.currentTimeMillis();;
differenceTime = (int) (endTime - beginTime);
sleepTime = (int) (framePeriod - differenceTime);
if(sleepTime > 0) {
try {
Thread.sleep(sleepTime);
} catch (InterruptedException exception) {
exception.printStackTrace();
}
}
else {
while(sleepTime < 0 && numberOfFramesSkipped < this.maxFrameSkips) {
// Call your update method here
sleepTime += framePeriod;
numberOfFramesSkipped++;
}
}
}
}
}
private void renderFrameBuffer() {
// Update the current virtual screen image
game.getCurrentScreen().render();
// Render the current virtual screen to the real phone screen
frameBuffer = holder.lockCanvas();
if(frameBuffer != null) { // Fix for mysterious bug ( FATAL EXCEPTION: Thread)
// The viewing area of our virtual screen on our real screen
// Composition
// First layer (bottom)
frameBuffer.drawBitmap(this.gameScreen, null, game.getWSScreen().getGameScreendst(), null);
// Second layer (top)
frameBuffer.drawBitmap(this.gameScreenExtended, null, game.getWSScreen().getGameScreenextendeddst(), null);
holder.unlockCanvasAndPost(frameBuffer);
}
else {
gameEngineLog.e(classTAG, "Surface has not been created or otherwise cannot be edited");
}
}
public void resume() {
this.running = true;
gameloop = new Thread(this);
gameloop.start();
}
public void pause() {
this.running = false;
running = false;
while(true) {
try {
gameloop.join();
break;
} catch (InterruptedException e) {
// retry
}
}
}
}
public void onDraw() {
}
我建议你看一下这个链接或者看看 http://code.google.com/p/beginning-android-games/ 或http://www.edu4java.com/en/androidgame/androidgame3.html