我现在正在开发一个应用程序,该应用程序将在 onClick
事件上绘制线条。我在 LineView.java
类中绘制线条,并在 MainActivity.java
中执行 onClick
方法。为了解决这个问题,我查看了类似的问题。
第一个解决方案:
LineView.onDraw();
它给我这个错误:
Multiple markers at this line
- The method onDraw(Canvas) in the type LineView is not applicable for the
arguments ()
- Suspicious method call; should probably call "draw" rather than "onDraw"
我尝试在MainActivity中编写:
LineView lineView = new LineView(null);
lineView.onDraw();
但它也会产生一个错误:
Multiple markers at this line
- The method onDraw(Canvas) in the type LineView is not applicable for the
arguments ()
- Suspicious method call; should probably call "draw" rather than "onDraw"
这是我的LineView.java文件:
public class LineView extends View {
Paint paint = new Paint();
Point A;
Point B;
boolean draw = false;
public void onCreate(Bundle savedInstanceState) {
}
public LineView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public LineView(Context context, AttributeSet attrs, int defstyle) {
super(context, attrs, defstyle );
}
public LineView(Context context) {
super(context);
paint.setColor(Color.BLACK);
}
@Override
public void onDraw(Canvas canvas) {
draw = MainActivity.draw;
if(draw){
//A = (getIntent().getParcelableExtra("PointA"));
A = MainActivity.A;
B = MainActivity.B;
canvas.drawLine(A.x, A.y, B.x, B.y, paint);
}
}
private Intent getIntent() {
// TODO Auto-generated method stub
return null;
}
}
我的MainActivity.java
中的onClick
方法:
@Override
public void onClick(View v) {
draw = true;
LineView.onDraw();
}
});
感谢您的提前帮助!