关于安卓底部DialogFragment基类封装（二）
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<FrameLayout> bottomSheetBehavior;
@Nullable
@Override
public 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;
}
@Override
public void onDestroyView() {
clearObserver();
super.onDestroyView();
}
@NonNull
@Override
public 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() {
@Override
public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {
return !mCancelable;
}
});
}
return mDialog;
}
@Override
public 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<T> extends DisposableObserver<T> {
@Override
protected void onStart() {
super.onStart();
addObserver(this);
}
@Override
public void onNext(@NonNull T t) {
}
@Override
public void onError(@NonNull Throwable e) {
removeObserver(this);
}
@Override
public 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-------------------------------------------------------------------------
