android - 将 Activity 对象传递给android中的非 Activity 类

Question

我有一个来自这样的 Activity 类的对象:

 CustomPaint customCanvasPaint=(CustomPaint) dialog.findViewById(R.id.customCanvasPaint);

如何像这样将这个对象传递给类:

public class CustomPaint extends CanvasView {
  public CustomPaint(Context context) {
    super(context);
    initialize(context);
  }

  public CustomPaint(Context context, AttributeSet attrs) {
    super(context, attrs);
    initialize(context);
  }


  public void initialize(Context context){
    LayoutInflater inflater=(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View view=inflater.inflate(R.layout.custom_paint,null);
    CanvasView canvasView = (CanvasView) view.findViewById(R.id.customCanvasView);
    canvasView.setPaintStrokeColor(Color.RED);
    canvasView.setPaintStrokeWidth(12f);
  }
}

我想在初始化方法中自定义对象，但绘制颜色和绘制宽度不变。我该怎么做？谢谢。

Answer 1

public class CustomPaint extends CanvasView {
 CanvasView mCanvasView;
 public CustomPaint(Context context,CanvasView canvasView) {
    super(context);
    this.mCanvasView = canvasView;
    initialize(context);
  }

  public CustomPaint(Context context, AttributeSet attrs,CanvasView canvasView) {
    super(context, attrs);
    this.mCanvasView = canvasView;
    initialize(context);
  }

public void initialize(Context context){

canvasView.setPaintStrokeColor(Color.RED);
canvasView.setPaintStrokeWidth(12f);
 }
  }

和表单 Activity

 CanvasView canvasPaint=(CanvasView) dialog.findViewById(R.id.canvasPaint);
CustomPaint mCustomPaint = new CustomPaint(this,canvasPaint);