我有一个名为 Screen 的抽象类以这种方式实现....
public abstract class Screen {
protected final Game game;
public Screen(Game game) {
this.game = game;
}
public abstract void update(float deltaTime);
public abstract void present(float deltaTime);
public abstract void pause();
public abstract void resume();
public abstract void dispose();
}
和一个扩展 Screen 类的类
public class LoadingScreen extends Screen {
public LoadingScreen(Game game) {
super(game);
}
@Override
public void update(float deltaTime) {
}
@Override
public void present(float deltaTime) {
// TODO Auto-generated method stub
}
@Override
public void pause() {
// TODO Auto-generated method stub
}
@Override
public void resume() {
// TODO Auto-generated method stub
}
@Override
public void dispose() {
// TODO Auto-generated method stub
}
}
但是当我尝试执行该项目时,我得到了以下日志:
04-07 03:01:09.603: E/AndroidRuntime(1107): FATAL EXCEPTION: main
04-07 03:01:09.603: E/AndroidRuntime(1107): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.mobi.classic.snake/com.mobi.classic.snake.LoadingScreen}: java.lang.InstantiationException: com.mobi.classic.snake.LoadingScreen
04-07 03:01:09.603: E/AndroidRuntime(1107): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
04-07 03:01:09.603: E/AndroidRuntime(1107): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
04-07 03:01:09.603: E/AndroidRuntime(1107): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
04-07 03:01:09.603: E/AndroidRuntime(1107): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
04-07 03:01:09.603: E/AndroidRuntime(1107): at android.os.Handler.dispatchMessage(Handler.java:99)
04-07 03:01:09.603: E/AndroidRuntime(1107): at android.os.Looper.loop(Looper.java:123)
04-07 03:01:09.603: E/AndroidRuntime(1107): at android.app.ActivityThread.main(ActivityThread.java:4627)
04-07 03:01:09.603: E/AndroidRuntime(1107): at java.lang.reflect.Method.invokeNative(Native Method)
04-07 03:01:09.603: E/AndroidRuntime(1107): at java.lang.reflect.Method.invoke(Method.java:521)
04-07 03:01:09.603: E/AndroidRuntime(1107): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
04-07 03:01:09.603: E/AndroidRuntime(1107): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
04-07 03:01:09.603: E/AndroidRuntime(1107): at dalvik.system.NativeStart.main(Native Method)
04-07 03:01:09.603: E/AndroidRuntime(1107): Caused by: java.lang.InstantiationException: com.mobi.classic.snake.LoadingScreen
04-07 03:01:09.603: E/AndroidRuntime(1107): at java.lang.Class.newInstanceImpl(Native Method)
04-07 03:01:09.603: E/AndroidRuntime(1107): at java.lang.Class.newInstance(Class.java:1429)
04-07 03:01:09.603: E/AndroidRuntime(1107): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
04-07 03:01:09.603: E/AndroidRuntime(1107): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
04-07 03:01:09.603: E/AndroidRuntime(1107): ... 11 more
我是 Android 游戏编程的新手,我不知道问题是什么,我已经用谷歌搜索了这个问题并在这里查看了一些类似的问题,但我没有得到答案。请帮帮我...