上文封装了一个普通的dialogfragment
dialog fragment
是基于Android X DialogFragment 进行封装的。

本文将会基于BottomSheetDialogFragment进行封装。
对比普通的DialogFragment进行封装，不同的是，BottomSheetDialogFragment是专门用于底部弹窗进行封装的。
它有以下特点：
（一）拥有出场进场的动画（官方自带动画属性）
（二）可扩展BottomViewDialog，和BottomSheetBehavior实现拖拽相关操作，实现下拉关闭弹窗！

注意事项：
（1）适配软键盘弹出，需要通过dialog的window设置键盘参数，具体代码如下：

getDialog().getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_NOTHING);

注意，如果要通过getActivity()设置外层的window键盘参数模式，代码同上，使用键盘监听的方法会失效！具体原因是因为监听不到键盘弹出事件了！
（2）内部布局为recyclerview时，存在滑动冲突，需要手动设置以下代码，适配欢动冲突事件：

rvContent.getRecyclerView().setHasFixedSize(true);
rvContent.getRecyclerView().setNestedScrollingEnabled(false);

原理和recyclerview适配scrollview时一致的。

最后放出全部代码：

package com.jeagine.cloudinstitute2.view.dialogfragment;import android.app.Dialog;
import android.content.DialogInterface;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.widget.FrameLayout;import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.coordinatorlayout.widget.CoordinatorLayout;import com.google.android.material.bottomsheet.BottomSheetBehavior;
import com.google.android.material.bottomsheet.BottomSheetDialog;
import com.google.android.material.bottomsheet.BottomSheetDialogFragment;
import com.jeagine.cloudinstitute2.R;
import com.jeagine.yidian.util.SystemBarUtils;import io.reactivex.rxjava3.disposables.CompositeDisposable;
import io.reactivex.rxjava3.observers.DisposableObserver;/*** FileName: BaseDialogFragment* Author: lzt* Date: 2022/8/30 17:33* change by lzt 20221020 抽离默认宽高初始化方法*/
public abstract class BaseBottomDialogFragment extends BottomSheetDialogFragment {private int DEFAULT_WIDTH = WindowManager.LayoutParams.MATCH_PARENT;//宽private int DEFAULT_HEIGHT = WindowManager.LayoutParams.MATCH_PARENT;//高private int DEFAULT_GRAVITY = Gravity.BOTTOM;//位置private boolean mCancelable = true;//默认可取消private boolean mCanceledOnTouchOutside = true;//默认点击外部可取消private BottomSheetBehavior bottomSheetBehavior;@Nullable@Overridepublic View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {View mView = inflater.inflate(getLayoutId(), container, false);initViews(mView);
//        getActivity().getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_NOTHING);if (getDialog() != null && getDialog().getWindow() != null) {getDialog().getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_NOTHING);}return mView;}@Overridepublic void onDestroyView() {clearObserver();super.onDestroyView();}@NonNull@Overridepublic Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {BottomSheetDialog mDialog = (BottomSheetDialog) super.onCreateDialog(savedInstanceState);if (null != mDialog) {//初始化mDialog.requestWindowFeature(Window.FEATURE_NO_TITLE);mDialog.setCanceledOnTouchOutside(mCanceledOnTouchOutside);mDialog.setCancelable(mCancelable);Window window = mDialog.getWindow();if (null != window) {window.getDecorView().setPadding(0, 0, 0, 0);window.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));WindowManager.LayoutParams lp = window.getAttributes();lp.width = defWidth();lp.height = defHeight();lp.gravity = DEFAULT_GRAVITY;lp.windowAnimations = android.R.style.Animation_InputMethod;window.setAttributes(lp);window.setDimAmount(dimAmount());}mDialog.setOnKeyListener(new DialogInterface.OnKeyListener() {@Overridepublic boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {return !mCancelable;}});}return mDialog;}@Overridepublic void onStart() {super.onStart();initSlide();}/*** 初始化滑动交互*/private void initSlide() {if (!canSlide()) {return;}try {if (getDialog() != null && getDialog() instanceof BottomSheetDialog) {int peekHeight = getPeekHeight() -SystemBarUtils.getStatusBarHeight(getContext());BottomSheetDialog dialog = (BottomSheetDialog) getDialog();//把windows的默认背景颜色去掉，不然圆角显示不见dialog.getWindow().findViewById(R.id.design_bottom_sheet).setBackground(new ColorDrawable(Color.TRANSPARENT));//获取dialog的根部局FrameLayout bottomSheet = dialog.getDelegate().findViewById(R.id.design_bottom_sheet);//获取根部局的LayoutParams对象CoordinatorLayout.LayoutParams layoutParams = (CoordinatorLayout.LayoutParams) bottomSheet.getLayoutParams();layoutParams.height = peekHeight;//修改弹窗的最大高度，不允许上滑（默认可以上滑）bottomSheet.setLayoutParams(layoutParams);bottomSheetBehavior = BottomSheetBehavior.from(bottomSheet);//peekHeight即弹窗的最大高度bottomSheetBehavior.setPeekHeight(peekHeight);//初始为展开状态bottomSheetBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);
//                bottomSheetBehavior.setHideable(false);}} catch (Exception e) {e.printStackTrace();}}/*** 弹窗高度* 子类可重写该方法返回peekHeight** @return height*/protected int getPeekHeight() {return getResources().getDisplayMetrics().heightPixels;}protected float dimAmount() {return 0.6f;}protected int defWidth() {return DEFAULT_WIDTH;}protected int defHeight() {return DEFAULT_HEIGHT;}/*** 能否滑动*/protected boolean canSlide() {return true;}/*** 设置位置** @param gravity*/public void setGravity(int gravity) {DEFAULT_GRAVITY = gravity;}/*** 设置宽** @param width*/public void setWidth(int width) {DEFAULT_WIDTH = width;}/*** 设置高** @param height*/public void setHeight(int height) {DEFAULT_HEIGHT = height;}/*** 设置点击返回按钮是否可取消** @param cancelable*/public void setCancelable(boolean cancelable) {mCancelable = cancelable;}/*** 设置点击外部是否可取消** @param canceledOnTouchOutside*/public void setCanceledOnTouchOutside(boolean canceledOnTouchOutside) {mCanceledOnTouchOutside = canceledOnTouchOutside;}/*** 设置布局** @return*/protected abstract int getLayoutId();/*** 初始化Views** @param v*/protected abstract void initViews(View v);//rxjava release----------------------------private CompositeDisposable mDisposables = new CompositeDisposable();private void addObserver(DisposableObserver disposableObserver) {mDisposables.add(disposableObserver);}private void removeObserver(DisposableObserver disposableObserver) {if (mDisposables == null || disposableObserver == null) {return;}mDisposables.remove(disposableObserver);}private void clearObserver() {if (mDisposables != null) {mDisposables.clear();}}public abstract class BaseSafeObserver extends DisposableObserver {@Overrideprotected void onStart() {super.onStart();addObserver(this);}@Overridepublic void onNext(@NonNull T t) {}@Overridepublic void onError(@NonNull Throwable e) {removeObserver(this);}@Overridepublic void onComplete() {removeObserver(this);}}public void releaseResource() {clearObserver();}//rxjava release----------------------------/*** 能否向下滑动收起弹窗*/protected void setCanSlide(boolean canSlide) {
//        if (bottomSheetBehavior != null) {
//            if (bottomSheetBehavior.isHideable() == canSlide) {
//                return;
//            }
//            bottomSheetBehavior.setHideable(canSlide);
//        }}}

that’s all-------------------------------------------------------------------------