安卓 BottomSheetDialog

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BottomSheetDialog的使用： 

首先要先创建一个类，然后继承：BottomSheetDialogFragment 重写 onCreateDialog 方法；

public class CommentBottomDialog extends BottomSheetDialogFragment {
 
    @NonNull
    @NotNull
    @Override
    public Dialog onCreateDialog(@Nullable @org.jetbrains.annotations.Nullable Bundle savedInstanceState) {
        if (getActivity() == null) return super.onCreateDialog(savedInstanceState);
        // 第二个参数是设置 dialog 的背景样式
        BottomSheetDialog dialog = new BottomSheetDialog(getActivity(), R.style.BottomSheetStyle);
        // 这个是设置 dialog 弹出动画
        Window window = dialog.getWindow();
        if (window != null) {
            window.setWindowAnimations(R.style.BottomSheetStyle);
        }
 
        // 设置 dialog 布局
        initView(dialog);
 
        return dialog;
    }
 
    private void initView(BottomSheetDialog dialog) {
        View root = LayoutInflater.from(getActivity()).inflate(R.layout.dialog_comment_layout, null);
        dialog.setContentView(root);
        //设置高度
        ViewGroup.LayoutParams params = root.getLayoutParams();
        params.height = (int) (0.75 *
                getResources().getDisplayMetrics().heightPixels);
        root.setLayoutParams(params);
 
        // 初始化 dialog 布局里的控件
        ImageView iv_close = root.findViewById(R.id.iv_close);
        // 点击关闭 dialog
        iv_close.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                dialog.dismiss();
            }
        });
 
        // TODO 下面做一些其他操作自由扩展
        // ...
 
    }
 
}

BottomSheetStyle

    
    <style name="BottomSheetStyle" parent="Theme.AppCompat.Dialog">
        
        <item name="android:windowBackground">@android:color/transparentitem>
        
        <item name="android:windowFrame">@nullitem>
        
        <item name="android:backgroundDimEnabled">trueitem>
        
        <item name="android:windowIsFloating">trueitem>
        
        <item name="android:windowEnterAnimation">@anim/popup_initem>
        <item name="android:windowExitAnimation">@anim/popup_outitem>
    style>

在res文件夹下新建文件夹：anim

popup_in

<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate android:fromYDelta="100%p" android:toYDelta="0" android:duration="400"/>
    <alpha android:fromAlpha="0" android:toAlpha="1.0" android:duration="400"/>
set>

popup_out

<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate android:fromYDelta="0" android:toYDelta="100%p" android:duration="500"/>
    <alpha android:fromAlpha="1.0" android:toAlpha="0" android:duration="500"/>
set>

dialog展示：

CommentBottomDialog bottomDialog = new CommentBottomDialog();
bottomDialog.show(getBaseActivity().getSupportFragmentManager(), "halo");