Android GridView在一行中绘制其元素
我想在画布上画一个网格视图。我有一个自定义视图,我正在覆盖它的onDraw以实现这一点Android GridView在一行中绘制其元素,android,gridview,android-canvas,android-custom-view,Android,Gridview,Android Canvas,Android Custom View,我想在画布上画一个网格视图。我有一个自定义视图,我正在覆盖它的onDraw以实现这一点 @Override public void onDraw(Canvas canvas) { super.onDraw(canvas); canvas.save(); canvas.translate(mPosX, mPosY); canvas.scale(mScaleFactor, mScaleFactor); li = (LayoutInflater)mContex
@Override
public void onDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.save();
canvas.translate(mPosX, mPosY);
canvas.scale(mScaleFactor, mScaleFactor);
li = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
gridView = (GridView)li.inflate(R.layout.activity_main, null);
gridView.setAdapter(mImageAdapter);
gridView.setDrawingCacheEnabled(true);
Bitmap cac = getDrawingCache();
if(cac != null) {
canvas.drawBitmap(cac, 0, 0, new Paint());
} else {
gridView.measure(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.MATCH_PARENT);
gridView.layout(0, 0, gridView.getMeasuredWidth(), gridView.getMeasuredHeight());
gridView.draw(canvas);
}
canvas.restore();
}
以下是GridView的XML:
将绘制GridView,但所有图像都绘制在一行中。
我想我可能必须覆盖这个GridView上的onMeasure,但我不确定如何继续。请帮帮我 您对measure()
的调用错误。此方法将“测量规格”作为参数,可以使用View.MeasureSpec
类构建参数。在您的情况下,您需要的是:
int widthSpec = MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.AT_MOST);
int heightSpec = MeasureSpec.makeMeasureSpec(getHeight(), MeasureSpec.EXACTLY);
gridView.measure(widthSpec, heightSpec);
这是将您的内容
/匹配父母
转换为测量规格。非常感谢:)学到了一个新东西。
int widthSpec = MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.AT_MOST);
int heightSpec = MeasureSpec.makeMeasureSpec(getHeight(), MeasureSpec.EXACTLY);
gridView.measure(widthSpec, heightSpec);