我正在尝试将可绘制背景应用于列表适配器中的文本视图。我有一个可绘制的背景,在xml中定义为
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
<solid android:color="@color/black" />
<stroke android:width="1dip" android:color="#ffffff"/>
</shape>
我在我的活动中得到了这个可绘制元素
Drawable mDrawable = mContext.getResources().getDrawable(R.drawable.back);
现在我有各种十六进制代码字符串,我想改变背景,但不知道怎么做。彩色滤光片还是什么?
答案 0 :(得分:2)
一种方法是:
public class MyDrawable extends ShapeDrawable{
private Paint mFillPaint;
private Paint mStrokePaint;
private int mColor;
@Override
protected void onDraw(Shape shape, Canvas canvas, Paint paint) {
shape.drawPaint(mFillPaint, canvas);
shape.drawPaint(mStrokePaint, canvas);
super.onDraw(shape, canvas, paint);
}
public MyDrawable() {
super();
// TODO Auto-generated constructor stub
}
public void setColors(Paint.Style style, int c){
mColor = c;
if(style.equals(Paint.Style.FILL)){
mFillPaint.setColor(mColor);
}else if(style.equals(Paint.Style.STROKE)){
mStrokePaint.setColor(mColor);
}else{
mFillPaint.setColor(mColor);
mStrokePaint.setColor(mColor);
}
super.invalidateSelf();
}
public MyDrawable(Shape s, int strokeWidth) {
super(s);
mFillPaint = this.getPaint();
mStrokePaint = new Paint(mFillPaint);
mStrokePaint.setStyle(Paint.Style.STROKE);
mStrokePaint.setStrokeWidth(strokeWidth);
mColor = Color.BLACK;
}
}
用法:
MyDrawable shapeDrawable = new MyDrawable(new RectShape(), 12);
//whenever you want to change the color
shapeDrawable.setColors(Style.FILL, Color.BLUE);
或尝试第二种方法,将Drawable投射到ShapeDrawable
,创建单独的Paint
并将其设置为:castedShapeDrawable.getPaint().set(myNewPaint);