默认BottomSheetDialogFragment 菜单全部显示

最新推荐文章于 2024-04-24 15:42:15 发布

原创最新推荐文章于 2024-04-24 15:42:15 发布 · 860 阅读

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本文介绍如何使用 BottomSheetDialogFragment 在 Android 应用中实现 BottomSheet 的扩展状态，通过覆写 onStart 方法并利用 View 和 CoordinatorLayout 来设置 BottomSheet 的初始状态为展开。

import android.support.annotation.Nullable;
import android.support.design.widget.BottomSheetDialogFragment;
import android.support.design.widget.BottomSheetBehavior;
import android.support.design.widget.CoordinatorLayout;

@Override
public void onStart() {
  super.onStart();
  final View view = getView();
  view.post(new Runnable() {
    @Override
    public void run() {
      View parent = (View) view.getParent();
      CoordinatorLayout.LayoutParams params = (CoordinatorLayout.LayoutParams) (parent).getLayoutParams();
      CoordinatorLayout.Behavior behavior = params.getBehavior();
      mBehavior = (BottomSheetBehavior) behavior;
      mBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);
    }
  });
}