挖孔的Android布局 [英] Dig holes in Android layouts
问题描述
是否有可能在Android layout.I创造洞中有两个背景,一是正常的,人们模糊,我想创建细胞,它可以显示模糊的背景。
Is it possible to create holes in an Android layout.I have two backgrounds, one normal, one blurred, and what I want to create cells that can display the blurred background.
我的XML将这样的构造:
My XML would be constructed like this:
Background_blurred> Background_normal>细胞。
Background_blurred > Background_normal > Cells.
- 我已经知道如何模糊背景。
-I already know how to blur a background.
- 细胞遍地都是,就像一个GridView,而不仅仅是边界。
-Cells are everywhere, like a GridView, and not just on the borders.
推荐答案
试试这个:
class FL extends FrameLayout {
private List<View> mViews = new ArrayList<View>();
private Bitmap mBack;
private Bitmap mBackBlur;
private int[] mLocation = new int[2];
private Matrix mMatrix = new Matrix();
public FL(Context context) {
super(context);
Resources res = getResources();
mBack = BitmapFactory.decodeResource(res, R.drawable.back);
mBackBlur = BitmapFactory.decodeResource(res, R.drawable.back_blur);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
RectF src = new RectF(0, 0, mBack.getWidth(), mBack.getHeight());
RectF dst = new RectF(0, 0, w, h);
mMatrix.setRectToRect(src, dst, ScaleToFit.FILL);
}
public void add(View v) {
mViews.add(v);
}
@Override
protected void dispatchDraw(Canvas canvas) {
canvas.drawBitmap(mBack, mMatrix, null);
canvas.save(Canvas.CLIP_SAVE_FLAG);
getLocationOnScreen(mLocation);
int x = mLocation[0];
int y = mLocation[1];
Op op = Op.REPLACE;
for (View v : mViews) {
v.getLocationOnScreen(mLocation);
mLocation[0] -= x;
mLocation[1] -= y;
int left = mLocation[0];
int top = mLocation[1];
int right = left + v.getWidth();
int bottom = top + v.getHeight();
canvas.clipRect(left, top, right, bottom, op);
op = Op.UNION;
}
canvas.drawBitmap(mBackBlur, mMatrix, null);
canvas.restore();
super.dispatchDraw(canvas);
}
}
测试code(中的onCreate):
testing code (in onCreate):
FL fl = new FL(this);
ScrollView sv = new ScrollView(this);
LinearLayout ll = new LinearLayout(this);
ll.setOrientation(LinearLayout.VERTICAL);
float[] hsv = {
0, 1, 0.75f
};
float[] h = {
0, 39, 60, 120, 300
};
for (int i = 0; i < 5; i++) {
TextView tv = new TextView(this);
hsv[0] = h[i];
tv.setTextColor(0xffeeeeee);
tv.setBackgroundColor(Color.HSVToColor(128, hsv));
tv.setPadding(10, 10, 10, 10);
tv.setTextSize(64);
tv.setText("#" + i);
LayoutParams params = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
params.topMargin = 10;
params.bottomMargin = 10;
params.leftMargin = 20;
params.rightMargin = 20;
ll.addView(tv, params);
fl.add(tv);
}
sv.addView(ll);
fl.addView(sv);
setContentView(fl);
在这里R.drawable.back是:
where R.drawable.back is:
和R.drawable.back_blur是:
and R.drawable.back_blur is:
结果是:
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