Question

在我的代码中，我希望获得另一个类中变量值的访问权限。更确切地说，我希望在我的类GameArena中访问变量点的vallue，并用值覆盖我的GameActivity类中的变量点。以下是课程：

public class GameArena extends View {
int points;
public GameArena(Context context) {
    super(context);
    [...]
    points = 0;
}

@Override
protected void onDraw(Canvas canvas){
    super.onDraw(canvas);

  [...]

   invalidate();
}

public void actualizePoints(){

}

@Override
public boolean onTouchEvent(MotionEvent event)
{
    [...]
    points++;
}

}

这是GameActivity：

public class GameActivity extends Activity {

Boolean gameRunning = false;
int round = 0;
int points = 0;
float screenScale;
GameArena gameArena;
FrameLayout gameArenaFrameLayout;



@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_game);
    startGame();
}

public void startGame(){
    startRound();
}

public void startRound(){
    points = 0;
    startGameArena();
}

public void startGameArena(){
    gameArenaFrameLayout = (FrameLayout)findViewById(R.id.frameLayoutGameArena);
    Log.i("GameArenaFrameLayout", Integer.toString(gameArenaFrameLayout.getWidth()));
    gameArena = new GameArena(this);
    gameArenaFrameLayout.addView(gameArena);
}

public void actualizeScreen(){

}

}

有人能给我一个提示，我该如何解决这个问题？谢谢。

Answer 1

使用getter：

public class GameArena extends View {
    private int points;
    public GameArena(Context context) {
        super(context);
        [...]
        points = 0;
    }

    public int getPoints() {
        return points;
    }
}

活动：

gameArena.getPoints();

从另一个变量到变量的类，该变量将活动扩展到扩展视图的类

1 个答案: