android项目实战开发六---分类筛选弹框自定义（popupwindow）

上效果图

 

一、定义popup_window_layout.xml

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:clickable="true"
    android:focusable="true">
    <View
        android:id="@+id/overlay"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
    />

    <LinearLayout
        android:id="@+id/pop_main_category"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:background="@color/white2"
        android:orientation="vertical">

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/recyclerView"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginTop="@dimen/dp_20"
        />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/white"
            android:layout_marginTop="@dimen/dp_20"
            android:orientation="horizontal">
            <TextView
                android:id="@+id/btn_reset"
                android:layout_width="0dp"
                android:layout_weight="1"
                android:layout_height="wrap_content"
                android:text="重置"
                android:textSize="@dimen/sp_16"
                android:padding="@dimen/dp_10"
                android:gravity="center"/>

            <TextView
                android:id="@+id/btn_confirm"
                android:layout_width="0dp"
                android:layout_weight="1"
                android:layout_height="wrap_content"
                android:text="确定"
                android:textSize="@dimen/sp_16"
                android:padding="@dimen/dp_12"
                android:gravity="center"
                android:textColor="@color/white"
                android:background="@color/colorPrimary"/>
        </LinearLayout>

    </LinearLayout>

</FrameLayout>

二、自定义CategoryPopupWindow关键代码

public class CategoryPopupWindow  extends PopupWindow {
    public Context context;
    public List<String> list=new ArrayList<>();
    public RecyclerView recyclerView;
    private ItemCategoryAdapter itemCategoryAdapter;
    public PopCallBack popCallBack;

    public CategoryPopupWindow(Context context) {
        super(context);
        this.context=context;
        //初始化布局
        initView(context);
    }

    public void intData(List<String> list){

        this.list=list;
        //初始化布局
        initView(context);
        initViews();
    }

    //初始化布局
    private void initView(Context context) {
        //加载自定义布局文件
        View contentView = LayoutInflater.from(context).inflate(R.layout.popup_window_layout, null);
        //设置PopupWindow的宽度和高度
        setWidth(ViewGroup.LayoutParams.MATCH_PARENT);
        setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);

        //设置PopupWindow的视图内容
        setContentView(contentView);
        setBackgroundDrawable(new ColorDrawable(0x80000000));
        setFocusable(true);
        setOutsideTouchable(true);

        recyclerView=contentView.findViewById(R.id.recyclerView);
        GridLayoutManager layoutManager = new GridLayoutManager(context, 3);
        recyclerView.setLayoutManager(layoutManager);
    }

    // 初始化控件
    private void initViews() {
        itemCategoryAdapter=new ItemCategoryAdapter(context,list);
        recyclerView.setAdapter(itemCategoryAdapter);
        //重置事件
        TextView button =   getContentView().findViewById(R.id.btn_reset);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                itemCategoryAdapter.resetLastPressIndex();
            }
        });
        //
        TextView btn_confirm =   getContentView().findViewById(R.id.btn_confirm);
        btn_confirm.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                popCallBack.onClick(itemCategoryAdapter.getLastPressIndex());
                //关闭
                CategoryPopupWindow.super.dismiss();
            }
        });
    }
    //省略已下代码
    ********

忙里抽闲，记录下进度清空。等项目完成后，再重新整理下资料。