自定义PopupWindow提示

来源：互联网发布：哈尔滨软件开发88087 编辑：程序博客网时间：2024/06/01 07:49

1.有时候在项目中多处用到PopupWindow，所以直接封装出来一个，方便以后用直接可以复制

首先看一下工具类和其用到的布局

import android.content.Context;import android.graphics.drawable.BitmapDrawable;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.AdapterView;import android.widget.BaseAdapter;import android.widget.ListView;import android.widget.PopupWindow;import android.widget.TextView;import java.util.ArrayList;import java.util.List;public class PopupWindowUtil {    private ListView listView;    private PopupWindow window;    //窗口在x轴偏移量    private int xOff = 0;    //窗口在y轴的偏移量    private int yOff = 0;    public PopupWindowUtil(Context context, List<String> datas) {        window = new PopupWindow(context);        //ViewGroup.LayoutParams.WRAP_CONTENT，自动包裹所有的内容        window.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);        window.setFocusable(true);        //点击 back 键的时候，窗口会自动消失        window.setBackgroundDrawable(new BitmapDrawable());        //加载自定义视图        View localView = LayoutInflater.from(context).inflate(R.layout.lv_pw_menu, null);        listView = (ListView) localView.findViewById(R.id.lv_pop_list);        listView.setAdapter(new MyAdapter(context, datas));        listView.setTag(window);        //设置显示的视图        window.setContentView(localView);    }    public void setItemClickListener(AdapterView.OnItemClickListener listener) {        listView.setOnItemClickListener(listener);    }    public void dismiss() {        window.dismiss();    }    public void show(View paramView, int count) {        //该count 是手动调整窗口的宽度        window.setWidth(paramView.getWidth() * count);        //设置窗口显示位置, 后面两个0 是表示偏移量，可以自由设置        window.showAsDropDown(paramView, xOff, yOff);        //更新窗口状态        window.update();    }    class MyAdapter extends BaseAdapter {        private Context context;        private List<String> mDatas;        public MyAdapter(Context context, List<String> datas) {            this.context = context;            if (datas == null) {                datas = new ArrayList<>();            }            mDatas = datas;        }        @Override        public int getCount() {            return mDatas.size();        }        @Override        public Object getItem(int position) {            return mDatas.get(position);        }        @Override        public long getItemId(int position) {            return position;        }        @Override        public View getView(int position, View convertView, ViewGroup parent) {            TextView tvItem;            if (convertView == null) {                convertView = LayoutInflater.from(context).inflate(R.layout.lv_item_pw_menu, null);                tvItem = (TextView) convertView.findViewById(R.id.tv_item_pw_menu);                convertView.setTag(tvItem);            } else {                tvItem = (TextView) convertView.getTag();            }            tvItem.setText(getItem(position) + "");            return convertView;        }    }}

2.这边用到加载自定义视图的布局：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="match_parent"    android:background="@drawable/menu"    android:layout_height="match_parent"    android:paddingBottom="15.0dip"    android:paddingLeft="6.0dip"    android:paddingRight="6.0dip"    android:paddingTop="20.0dip">    <ListView        android:id="@+id/lv_pop_list"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:cacheColorHint="@null"        android:scrollbars="none" /></LinearLayout>

3.在适配器里面getView（）方法中显示的样式，内容和行为，其中使用了布局lv_item_pw_menu.xml：如下—

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:gravity="center_vertical"    android:layout_width="match_parent"    android:layout_marginLeft="8dp"    android:layout_marginRight="8dp"    android:background="@android:color/transparent"    android:layout_marginBottom="8dp"    android:layout_height="wrap_content">    <TextView        android:layout_width="match_parent"        android:gravity="center"        android:drawablePadding="3dp"        android:padding="7dp"        android:text="测试数据"        android:id="@+id/tv_item_pw_menu"        android:textSize="18sp"        android:layout_height="wrap_content" /></RelativeLayout>

4.在主MainActivity就可以直接调用，简单—

import android.content.Context;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.AdapterView;import android.widget.Toast;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity {    private Context context = this;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);    }    public void OnClick(View view) {        //添加数据源        final List<String> items = new ArrayList<>();        items.add("One");        items.add("Tow");        items.add("Three");        items.add("Form");        final PopupWindowUtil popupWindow = new PopupWindowUtil(context, items);        popupWindow.setItemClickListener(new AdapterView.OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {                popupWindow.dismiss();                Toast.makeText(context, "你点击了" + items.get(position), Toast.LENGTH_SHORT).show();            }        });        //根据后面的数据调节窗口的宽度        popupWindow.show(view, 10);    }}

方便自己以后需要用的时候，直接复制，效果图：

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