我真的很难过为什么这不起作用。尝试使用布局中的SurfaceView和绘制线程绘制一个简单的PNG到屏幕,而不是覆盖onDraw函数。它实际上与LunarLander示例项目完全相同(并且我实际上挫败了整个代码集)。
我已经通过日志测试了它,我知道精灵正被“绘制”到画布上,但窗口中没有任何内容。
这是代码,希望它不会太冗长(不重要的位被剥离):
activity_pannenkoekenhuis.xml(layout /)
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<com.example.pannenkoekenhuis.MainView
android:id="@+id/pannenkoekenhuis_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".Pannenkoekenhuis" >
</RelativeLayout>
</FrameLayout>
MainView(SurfaceView):
public class MainView extends SurfaceView implements SurfaceHolder.Callback {
class MainThread extends Thread {
SurfaceHolder surfaceHolder;
Context context;
Handler handler;
HandleResources hResources;
HandleGame hGame;
public MainThread(SurfaceHolder surfaceHolder, Context context,
Handler handler) {
this.surfaceHolder = surfaceHolder;
this.context = context;
this.handler = handler;
hResources = new HandleResources(context);
hGame = new HandleGame();
init();
}
@Override
public void run() {
while (true) {
Canvas canvas = null;
try {
canvas = surfaceHolder.lockCanvas(null);
synchronized (surfaceHolder) {
Drawable d = context.getResources().getDrawable(R.drawable.s_char);
d.draw(canvas);
}
} finally {
if (canvas != null) {
surfaceHolder.unlockCanvasAndPost(canvas);
}
}
}
}
}
MainThread thread;
public MainView(Context context, AttributeSet attrs) {
super(context, attrs);
SurfaceHolder surfaceHolder = getHolder();
getHolder().addCallback(this);
thread = new MainThread(surfaceHolder, context, new Handler());
setFocusable(true);
}
}
提前致谢。
答案 0 :(得分:1)