Question

我曾写过这部法律,我完全理解,为什么给我在“}”上留下的意想不到的错,将其删除到?

private class DemoView extends View{
        public DemoView(Context context) {
            super(context);
            // TODO Auto-generated constructor stub
        }//here***

        final int x = 0;
        final int y = 0;

this.setOnTouchListener(new View.OnTouchListener(){
            public boolean onTouch(View v, MotionEvent e){
                switch(e.getAction()){
                case MotionEvent.ACTION_DOWN:
                    x++;
                    break;
             case MotionEvent.ACTION_MOVE:   // touch drag with the ball
                // move the balls the same as the finger
                    x = x-25;
                    y = y-25;   
                    break;
                }
                return true;
            }//here***
         }

增编

Answer 1

多重错误:

First closing curly brace closed the constructor. Should be at the end of code.
setOnTouchListener() missed the closing brace.
You variables x,y should be fields (instead of automatic variables) so that they can be changed inside anonymous class View.OnTouchListener

这里是经过更正的法典(我希望它能做你打算做的):

public class DemoView extends View {

    int x = 0;
    int y = 0;

    public DemoView(Context context) {
        super(context);


        this.setOnTouchListener(new View.OnTouchListener() {
            public boolean onTouch(View v, MotionEvent e) {
                switch (e.getAction()) {
                    case MotionEvent.ACTION_DOWN:
                        x++;
                        break;
                    case MotionEvent.ACTION_MOVE:   // touch drag with the ball
                        // move the balls the same as the finger
                        x = x - 25;
                        y = y - 25;
                        break;
                }
                return true;
            }//here***
        });
    }
}

Answer 2

您在案卷末忘记了>>。两个领域宣布后的发言也载于任何方法。你们应当把他们移至建筑商。

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