我当前正在尝试使用ContextCompact.getColor()
从我的颜色资源xml中添加颜色xml,但由于某些原因,我无法传递单个版本的上下文。
我正在使用类作为处理程序,因此我不会试图从活动中传递。在我的活动中,我可以使用它们,但是在我的班级中,我不能传递getActivityContext()
this
等。我该怎么办?
另外,我将颜色添加到画布中,因此我无法在xml中添加颜色。
canvas.drawColor(Color.BLACK);
是我目前被迫使用的。我想用XML的颜色替换它。(我试图从本质上设置画布的背景)
我班级的完整代码:(我正在将此应用程序作为" Note"应用程序,以便我可以回顾一下以后的项目,因此所有评论)
public class GameHandling {
private SurfaceHolder holder;
private Resources resources;
private int screenWidth;
private int screenHeight;
private Ball ball;
private Bat player;
private Bat opponent;
public GameHandling(int width, int height, SurfaceHolder holder, Resources resources){
this.holder = holder;
this.resources = resources;
this.screenWidth = width;
this.screenHeight = height;
this.ball = new Ball(screenWidth, screenHeight, 400, 400);
this.player = new Bat(screenWidth, screenHeight, 0, 0, Bat.Position.LEFT);
this.opponent = new Bat(screenWidth, screenHeight, 0, 0, Bat.Position.RIGHT);
}
// setting the ball images to be drawn
public void inIt(){
Bitmap ballShadow = BitmapFactory.decodeResource(resources, R.mipmap.grey_dot);
Bitmap ballImage = BitmapFactory.decodeResource(resources, R.mipmap.red_dot);
Bitmap batPlayer = BitmapFactory.decodeResource(resources, R.mipmap.bat_player);
Bitmap batOpponent = BitmapFactory.decodeResource(resources, R.mipmap.bat_opponent);
ball.inIt(ballImage, ballShadow, 2, 0);
player.inIt(batPlayer, batPlayer, 0, 0);
opponent.inIt(batOpponent, batOpponent, 0, 0);
}
// calling Balls update method to update the ball
public void update(long elapsed){
ball.update(elapsed);
}
public void draw(){
Canvas canvas = holder.lockCanvas(); // Making a canvas object to draw on - .lockcanvas locks canvas
if(canvas != null) {
// draw in area between locking and unlocking
canvas.drawColor(Color.BLACK);
ball.draw(canvas);
player.draw(canvas);
opponent.draw(canvas);
holder.unlockCanvasAndPost(canvas); //-unlockcanvasandposts unlocks the canvas
}
}
}
将您的构造函数更改为此并使用ContextCompat.getColor(context,...
模式。
无论您在哪里创建此类(活动/片段),都可以通过上下文来调用getActivity()
或getApplicationContext()
new GameHandling( getActivity()/getApplicationContext(), ...)
public GameHandling(Context context, int width, int height, SurfaceHolder holder, Resources resources){
this.context = context;
this.holder = holder;
this.resources = resources;
this.screenWidth = width;
this.screenHeight = height;
this.ball = new Ball(screenWidth, screenHeight, 400, 400);
this.player = new Bat(screenWidth, screenHeight, 0, 0, Bat.Position.LEFT);
this.opponent = new Bat(screenWidth, screenHeight, 0, 0, Bat.Position.RIGHT);
}
我想到了一个解决方法,我用理想的颜色创建了一个图像,然后将其用作应用程序的背景。
但是它仍然是解决方法,因此它无法解决我的问题