StaggeredGridLayoutManager制作auto_fit列

Question

如何使StaggeredGridLayoutManager auto_fit具有所有屏幕大小，自动设置列数

recyclerViewadapter = new RecyclerViewAdapter(GetDataAdapter1, this);
StaggeredGridLayoutManager layoutManager = new StaggeredGridLayoutManager(3, StaggeredGridLayoutManager.VERTICAL);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setAdapter(recyclerViewadapter);

Answer 1

尝尝这个

 StaggeredGridLayoutManager layoutManager = new StaggeredGridLayoutManager(getSpan(), StaggeredGridLayoutManager.VERTICAL);

public int getSpan() {
    int orientation = getScreenOrientation(getActivity());
    if (isTV(getActivity())) return 4;
    if (isTablet(getActivity()))
        return orientation == Configuration.ORIENTATION_PORTRAIT ? 2 : 3;
    return orientation == Configuration.ORIENTATION_PORTRAIT ? 2 : 3;
}


public static boolean isTV(Context context) {
    return Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2 && ((UiModeManager) context
            .getSystemService(Context.UI_MODE_SERVICE))
            .getCurrentModeType() == Configuration.UI_MODE_TYPE_TELEVISION;
}

public static int getScreenOrientation(Context context) {
    return context.getResources().getDisplayMetrics().widthPixels <
            context.getResources().getDisplayMetrics().heightPixels ?
            Configuration.ORIENTATION_PORTRAIT : Configuration.ORIENTATION_LANDSCAPE;
}

public static boolean isTablet(Context context) {
    return (context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_LARGE;
}

Answer 2

如果项目宽度相同，则可以这样做：

mRecyclerView.getViewTreeObserver().addOnGlobalLayoutListener(
        new ViewTreeObserver.OnGlobalLayoutListener() {
            @Override
            public void onGlobalLayout() {
                mRecyclerView.getViewTreeObserver().removeOnGLobalLayoutListener(this);
                int viewWidth = mRecyclerView.getMeasuredWidth();
                float cardViewWidth = getActivity().getResources().getDimension(R.dimen.cardview_layout_width);
                int newSpanCount = (int) Math.floor(viewWidth / cardViewWidth);
                mLayoutManager.setSpanCount(newSpanCount);
                mLayoutManager.requestLayout();
            }
        });

Answer 3

创建用于获取大小的帮助类。

public class GetSize {
    public static int getColumnCount(Context context, int dp) {
        if ((double) (getScreenWidth(context)/getPointOfDp(context, dp)) <= 1) return 1;
        else return getScreenWidth(context)/getPointOfDp(context, dp);
    }

    public static int getScreenWidth(Context context){

        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        Display display = wm.getDefaultDisplay();

        Point point = new Point();
        display.getSize(point);

        return point.x; //Screen width
    }

    private static int getPointOfDp(Context context, int dp) { //Convert from dp to screen dots
        return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dp, context.getResources().getDisplayMetrics());
    }
}

要获得列计数，需要设置项目的最小宽度。

int columnCount = GetSize.getColumnCount(context, 288);

layoutManager = new StaggeredGridLayoutManager(columnCount, StaggeredGridLayoutManager.VERTICAL);
recyclerView.setLayoutManager(layoutManager);