我正在尝试在onCreate()
方法 中重绘自定义视图
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
circleView = (CircleView)findViewById(R.id.circleView);
circleView.setCircle(100, 100, 25);
circleView.wrapView();
}
和自定义视图是:
public class CircleView extends View
{
private Paint paint = null;
private int x = 50;
private int y = 50;
private int radius = 50;
public CircleView(Context context, AttributeSet attrs)
{
super(context, attrs);
init();
}
public CircleView(Context context)
{
super(context);
init();
}
private void init()
{
paint = new Paint();
}
public void setCircle(int x, int y, int radius)
{
this.x = x;
this.y = y;
this.radius = radius;
init();
this.invalidate();
}
@Override
protected void onDraw(Canvas canvas)
{
super.onDraw(canvas);
paint.setColor(Color.WHITE);
canvas.drawCircle(x, y, radius, paint);
Log.e("", "radius : " + radius);
}
public void setColor(int color)
{
paint.setColor(color);
}
public void wrapView()
{
this.setLayoutParams(new RelativeLayout.LayoutParams(radius*2, radius*2));
this.invalidate();
}
}
和xml是:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/layoutMain"
>
<com.pep1439.view.CircleView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/circleView" />
</RelativeLayout>
我只想调整圆圈的大小,但失败了。帮我画任意半径的圆。这该怎么做。如果我使用默认值,它工作正常。当我删除线时,它会画出圆圈circleView.setCircle(100, 100, 25);
。我想在运行时调整圆圈。谢谢。