PopupWindow 属性，我们的使用的途径

原创

汪小哥_ 2021-08-24 10:31:56 博主文章分类：Android ©著作权

文章标签 android ide 父类子类 java 文章分类 代码人生

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今天看到了，比人写的一个Demo，看到了之后感觉还不错，自己也是仔细的思考了一哈，其实这样的用途也是比较的多的嘛。

使用PopupWindow可实现弹出窗口效果,，其实和AlertDialog一样，也是一种对话框，两者也经常混用，但是也各有特点。下面就看看使用方法。

showAsDropDown的用法属性介绍

首先初始化一个PopupWindow，指定窗口大小参数。（这下面的东西看起来都是差不多的效果）

PopupWindow mPop = new PopupWindow(getLayoutInflater().inflate(R.layout.window, null)，LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

//自定义布局
ViewGroup menuView = (ViewGroup) mLayoutInflater.inflate(
R.layout.window, null, true);
PopupWindow mPop = new PopupWindow(menuView, LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT, true);
当然也可以手动设置PopupWindow大小。
mPop.setContentView(menuView );//设置包含视图
mPop.setWidth(int )
mPop.setHeight(int )//设置弹出框大小

设置进场动画：
mPop.setAnimationStyle(R.style.AnimationPreview);//设置动画样式

mPop.setOutsideTouchable(true);//这里设置显示PopuWindow之后在外面点击是否有效。

如果为false的话，那么点击PopuWindow外面并不会关闭PopuWindow。

当然这里很明显只能在Touchable下才能使用。（这个效果是十分的有用的哟）

当有mPop.setFocusable(false);的时候，说明PopuWindow不能获得焦点，即使设置设置了背景不为空也不能点击外面消失，只能由dismiss()消失，但是外面的View的事件还是可以触发,back键也可以顺利dismiss掉。当设置为popuWindow.setFocusable(true);的时候，加上下面两行设置背景代码，点击外面和Back键才会消失。
mPop.setFocusable(true);
mPop.setBackgroundDrawable(....);
mPop.showAsDropDown(anchor, 0, 0);//设置显示PopupWindow的位置位于View的左下方，x,y表示坐标偏移量mPop.setOnDismissListenerd(new PopupWindow.OnDismissListener(){})//设置窗口消失事件
看到了我们上面的这些属性，其实我们也就可以大概的了解到了，我们可以通过监听的方式，让任何的东西点击，然后呈现我们的PopWindow在其恰当的位置，至于我们的PopWinod，我们可以通过自定义的方式，进行改进其中的许多的东西。

PopupWindow 属性，我们的使用的途径_父类

58同城APP找房子的时候,看到筛选下拉框蛮不错的,然后也有很多朋友需要实现这个功能,,重构,封装.把一些公共的东西抽取出来,选择下拉框那块做成一个工具类,然后通过接口回调回来.进行处理吧，哈哈这里是原网址

1.MainActivity.java 用户点击区域TextView的时候,初始化自定义控件PopupWindow,然后显示PopupWindow.通过PopupWindow构造参数传入一个选择完成的监听接口实现。

[java] view plain copy

/**
* 主Activity
* @author ansen
* @create time 2015-09-25
*/
public class MainActivity extends Activity implements OnClickListener{
private SelectPopupWindow mPopupWindow = null;
private TextView tvZuQuyu;
private String[] parentStrings = {"全城","中原区","二七区","管城区","金水区","上街区","惠济区","郑东新区","高新区","经开区","郑州周边"};
private String[][] childrenStrings={{},
{"中原1","中原2","中原3","中原4","中原5","中原6","中原7","中原8","中原9","中原10","中原11","中原12","中原13","中原14","中原15"},
{"二七1","二七2","二七3","二七4","二七5","二七6","二七7","二七8","二七9","二七10","二七11","二七12","二七13","二七14","二七15"},
{"管城1","管城2","管城3","管城4","管城5","管城6","管城7","管城8","管城9","管城10","管城11","管城12","管城13","管城14","管城15"},
{"金水1","金水2","金水3","金水4","金水5","金水6","金水7","金水8","金水9","金水10","金水11","金水12","金水13","金水14","金水15"},
{"上街1","上街2","上街3","上街4","上街5","中原6","中原7","中原8","中原9","中原10","中原11","中原12","中原13","中原14","中原15"},
{"中原1","中原2","中原3","中原4","中原5","中原6","中原7","中原8","中原9","中原10","中原11","中原12","中原13","中原14","中原15"},
{"郑东新区1","郑东新区2","郑东新区3","中原4","中原5","中原6","中原7","中原8","中原9","中原10","中原11","中原12","中原13","中原14","中原15"},
{"高新区1","高新区2","高新区3","中原4","中原5","中原6","中原7","中原8","中原9","中原10","中原11","中原12","中原13","中原14","中原15"},
{"经开区1","经开区2","经开区3","中原4","中原5","中原6","中原7","中原8","中原9","中原10","中原11","中原12","中原13","中原14","中原15"},
{"周边1","周边2","周边3","中原4","中原5","中原6","中原7","中原8","中原9","中原10","中原11","中原12","中原13","中原14","中原15"},
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_chuzu_city_main);
tvZuQuyu = (TextView) findViewById(R.id.tvZuQuyu);
tvZuQuyu.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.tvZuQuyu:
if(mPopupWindow == null){
mPopupWindow = new SelectPopupWindow(parentStrings,childrenStrings,this,selectCategory);
}
mPopupWindow.showAsDropDown(tvZuQuyu, -5, 10);
break;
}
}
/**
* 选择完成回调接口
*/
private SelectCategory selectCategory=new SelectCategory() {
@Override
public void selectCategory(int parentSelectposition,int childrenSelectposition) {
String parentStr=parentStrings[parentSelectposition];
String childrenStr=childrenStrings[parentSelectposition][childrenSelectposition];
Toast.makeText(MainActivity.this, "父类别:"+parentStr+" 子类别:"+childrenStr, 0).show();
}
};
}

2.SelectPopupWindow.java 自定义的PopupWindow,在构造方法中设置内容,设置背景等.给要显示的两个ListView设置适配器,添加ListView点击事件,点击子类别的时候回调选中的两个下标,关闭PopupWindow。

[java] view plain copy

/**
* 选择PopupWindow
* @author ansen
* @create time 2015-10-09
*/
public class SelectPopupWindow extends PopupWindow{
private SelectCategory selectCategory;
private String[] parentStrings;
private String[][] childrenStrings;
private ListView lvParentCategory = null;
private ListView lvChildrenCategory= null;
private ParentCategoryAdapter parentCategoryAdapter = null;
private ChildrenCategoryAdapter childrenCategoryAdapter = null;
/**
* @param parentStrings 字类别数据
* @param childrenStrings 字类别二位数组
* @param activity
* @param selectCategory 回调接口注入
*/
public SelectPopupWindow(String[] parentStrings,String[][] childrenStrings,Activity activity,SelectCategory selectCategory) {
this.selectCategory=selectCategory;
this.parentStrings=parentStrings;
this.childrenStrings=childrenStrings;
View contentView = LayoutInflater.from(activity).inflate(R.layout.layout_quyu_choose_view, null);
DisplayMetrics dm = new DisplayMetrics();
activity.getWindowManager().getDefaultDisplay().getMetrics(dm); // 获取手机屏幕的大小
this.setContentView(contentView);
this.setWidth(dm.widthPixels);
this.setHeight(dm.heightPixels*7/10);
/* 设置背景显示 */
setBackgroundDrawable(activity.getResources().getDrawable(R.drawable.pop_bg));
/* 设置触摸外面时消失 */
setOutsideTouchable(true);
setTouchable(true);
setFocusable(true); /*设置点击menu以外其他地方以及返回键退出 */
/**
* 1.解决再次点击MENU键无反应问题
*/
contentView.setFocusableInTouchMode(true);
//父类别适配器
lvParentCategory= (ListView) contentView.findViewById(R.id.lv_parent_category);
parentCategoryAdapter = new ParentCategoryAdapter(activity,parentStrings);
lvParentCategory.setAdapter(parentCategoryAdapter);
//子类别适配器
lvChildrenCategory= (ListView) contentView.findViewById(R.id.lv_children_category);
childrenCategoryAdapter = new ChildrenCategoryAdapter(activity);
lvChildrenCategory.setAdapter(childrenCategoryAdapter);
lvParentCategory.setOnItemClickListener(parentItemClickListener);
lvChildrenCategory.setOnItemClickListener(childrenItemClickListener);
}
/**
* 子类别点击事件
*/
private OnItemClickListener childrenItemClickListener=new OnItemClickListener(){
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,long id) {
if(selectCategory!=null){
selectCategory.selectCategory(parentCategoryAdapter.getPos(),position);
}
dismiss();
}
};
/**
* 父类别点击事件
*/
private OnItemClickListener parentItemClickListener=new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,long id) {
childrenCategoryAdapter.setDatas(childrenStrings[position]);
childrenCategoryAdapter.notifyDataSetChanged();
parentCategoryAdapter.setSelectedPosition(position);
parentCategoryAdapter.notifyDataSetChanged();
}
};
/**
* 选择成功回调
* @author apple
*
*/
public interface SelectCategory{
/**
* 把选中的下标通过方法回调回来
* @param parentSelectposition 父类别选中下标
* @param childrenSelectposition 子类别选中下标
*/
public void selectCategory(int parentSelectposition,int childrenSelectposition);
}
}

3.layout_quyu_choose_view.xml PopupWindow展示的布局文件,两个就两个ListView

[html] view plain copy

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/pop_bg"
android:orientation="horizontal">
<ListView
android:id="@+id/lv_parent_category"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="3"
android:background="@color/zu_choose_left_item_bg"
android:cacheColorHint="@android:color/transparent"
android:divider="@color/zu_choose_left_item_diveder"
android:dividerHeight="1dp"
android:scrollbars="none"/>
<View
android:layout_width="1dp"
android:layout_height="fill_parent"
android:background="@color/zu_choose_left_item_diveder"/>
<ListView
android:id="@+id/lv_children_category"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="4"
android:background="@color/zu_choose_right_item_bg"
android:cacheColorHint="@android:color/transparent"
android:divider="@color/zu_choose_left_item_diveder"
android:dividerHeight="1dp"
android:scrollbars="none" />
</LinearLayout>

4.ParentCategoryAdapter.java 父类别适配器的实现,跟我们平时经常写的适配器没啥两样,就在getView方法里面判断是否选中,选中的那个下标颜色设置的不一样.

[java] view plain copy

/**
* 父类别适配器
* @author ansen
* @create time 2015-09-25
*/
public class ParentCategoryAdapter extends BaseAdapter {
private Context mContext;
private String[] str;
private int pos;
public ParentCategoryAdapter(Context context,String[] str) {
mContext = context;
this.str = str;
}
@Override
public int getCount() {
return str.length;
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
if (convertView == null) {
holder = new ViewHolder();
convertView = LayoutInflater.from(mContext).inflate(R.layout.activity_parent_category_item, null);
holder.tvParentCategoryName = (TextView) convertView.findViewById(R.id.tv_parent_category_name);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.tvParentCategoryName.setText(str[position]);
if(pos==position){
holder.tvParentCategoryName.setTextColor(mContext.getResources().getColor(R.color.list_text_select_color));
convertView.setBackgroundColor(mContext.getResources().getColor(R.color.zu_choose_right_item_bg));
}else{
holder.tvParentCategoryName.setTextColor(mContext.getResources().getColor(android.R.color.black));
convertView.setBackgroundColor(mContext.getResources().getColor(R.color.zu_choose_left_item_bg));
}
return convertView;
}
private class ViewHolder {
private TextView tvParentCategoryName;
}
public void setSelectedPosition(int pos) {
this.pos = pos;
}
public int getPos() {
return pos;
}
}