BottomSheetDialog的使用

BottomSheetDialog的简单使用

BottomSheetDialog bsd = new MyBottomSheetDialog(this);
bsd.setContentView(R.layout.items);//布局为任意布局
bsd.show();

比较坑的地方是：

1.向下滑动后，再show不出来

当我们设置bottomSheetDialog点击后不new,而是直接show的话，然而当我们会bottomSheetDialog 展开后，我们将BottomSheetDialog划下隐藏后， 再点击展示BottomSheetDialog后，会发现页面只是变暗，BottomsheetDialog未展开，这是由于之前我们划下收缩隐藏BottomSheetDialog后，bottomSheetDialogBehavior的状态为隐藏，再次show之后，系统未恢复bottomSheetDialogBehavior的状态，还是隐藏，所以再次点击后页面只是变暗。（未能解决，暂时只能每次都new）

2.解决BottomSheetDialog状态栏变黑的问题

继承BottomSheetDialog并重写其protected void onCreate(Bundle savedInstanceState)方法

Activity mActivity;
public MyBottomSheetDialog(@NonNull Context context) {
super(context);
mActivity = (Activity) context;
}
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
int screenHeight = getScreenHeight(mActivity);
int statusBarHeight = getStatusBarHeight(getContext());
int dialogHeight = screenHeight - statusBarHeight;
getWindow().setLayout(ViewGroup.LayoutParams.MATCH_PARENT, dialogHeight == 0 ? ViewGroup.LayoutParams.MATCH_PARENT : dialogHeight);
}

private static int getScreenHeight(Activity activity) {
DisplayMetrics displaymetrics = new DisplayMetrics();
activity.getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);
return displaymetrics.heightPixels;
}

private static int getStatusBarHeight(Context context) {
int statusBarHeight = 0;
Resources res = context.getResources();
int resourceId = res.getIdentifier("status_bar_height", "dimen", "android");
if (resourceId > 0) {
statusBarHeight = res.getDimensionPixelSize(resourceId);
}
return statusBarHeight;
}