android透明背景圆角,android - 具有圆角和透明背景的Android自定义警报对话框 - 堆栈内存溢出...
我使用onDraw of LinearLayout创建了一个带圆角的自定义AlertDialog，如下所示，
public class RoundedLinearLayout extends LinearLayout {
private Paint drawPaint;
private Paint roundPaint;
private int mCornerRadius = 100;
private RectF bounds;
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public RoundedLinearLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
onInit();
}
public RoundedLinearLayout(Context context, AttributeSet attrs) {
super(context, attrs);
onInit();
}
public RoundedLinearLayout(Context context) {
super(context);
onInit();
}
protected void onInit() {
drawPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
drawPaint.setColor(0xffffffff);
drawPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
roundPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
roundPaint.setColor(0xffffffff);
setWillNotDraw(false);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
if (w != oldw && h != oldh) {
bounds = new RectF(0, 0, w, h);
}
}
@Override
protected void dispatchDraw(Canvas canvas) {
Bitmap bitmap = Bitmap.createBitmap((int) bounds.width(), (int) bounds.height(), Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(bitmap);
super.dispatchDraw(c);
BitmapShader shader = new BitmapShader(bitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
Paint paint = new Paint();
paint.setAntiAlias(true);
paint.setShader(shader);
canvas.drawRoundRect(bounds, mCornerRadius, mCornerRadius, paint);
}
}
然后我通过getWindow()添加透明度并设置window.alpha = 0.5f 。 生成的对话框是，
我想删除那些角落的白色背景。 我在这里搜索了100个问题，没有答案可以让我得到完美的圆角警报对话框。 任何帮助，将不胜感激！