Android - PopupWindow
PopupWindow 类位于android.widget 包下，API注释为：
使用PopupWindow 的大致步骤：
首先需要创建一个PopupWindow 对象，可以使用的构造函数有
这几个参数还可以通过以下方法来设置：
public void setContentView(View contentView) {} // 设置显示内容
public void setWidth(int width) {} //设置宽度
public void setHeight(int height) {} //设置高度
public void setFocusable(boolean focusable) {} //设置获取焦点
可通过getWidth()和getHeight()方法获取显示内容的宽度和高度
拿public PopupWindow(View contentView, int width, int height, boolean focusable) {}这个构造函数举例，在设置好需要显示的内容、宽度和高度等属性之后，接下来需要做的就是确定PopupWindow的显示位置和方式。
public void setAnimationStyle(int animationStyle) {} //设置PopupWindow的动画效果
显示位置可以有如下几种选择：
public void showAsDropDown(View anchor) {} // 相对于anchor的左下角开始显示
public void showAsDropDown(View anchor, int xoff, int yoff) {} // 相对于anchor的左下角一定的偏移量开始显示
public void showAtLocation(View parent, int gravity, int x, int y) {} // 相对于parent 一定的偏移量开始显示
到此，展示内容、宽度、高度、展示位置和动画效果都确定了，可以说简单的实现已经完成。另外
public void dismiss() {} // 收起PopupWindow
想要在PopupWindow之外的地方点击屏幕收起PopupWindow需要使用如下两个方法（必须同时使用）：
statePopupwindow.setOutsideTouchable(true); statePopupwindow.setBackgroundDrawable(new BitmapDrawable()); // 必须使用该方法的原因，网上已有比较详细的答案
下边是Demo部分代码：
MainActivity.java:
public class MainActivity extends Activity implements OnClickListener {
private TextView tvStateLimited;
private TextView tvTimeLimited;
private View stateWindowView;
private LinearLayout llBackgroundGray;
private PopupWindow statePopupwindow;
private CompeteTitleAdapter titleAdapter;
private List<String> listState = null;
private int loc_state = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
findView();
initData();
setListener();
}
private void initData() {
listState = new ArrayList<String>();
String[] state = getResources().getStringArray(R.array.HandleState);
for (int i = 0; i < state.length; i++) {
listState.add(state[i]);
}
}
private void setListener() {
tvStateLimited.setOnClickListener(this);
}
private void findView() {
tvStateLimited = (TextView) findViewById(R.id.tv_state_limited);
tvTimeLimited = (TextView) findViewById(R.id.tv_time_limited);
llBackgroundGray = (LinearLayout) findViewById(R.id.ll_background_gray);
stateWindowView = getLayoutInflater().inflate(R.layout.state_popupwindow_content_layout, null, false);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.tv_state_limited:
llBackgroundGray.setVisibility(View.VISIBLE);
initStateSelect();
statePopupwindow.showAsDropDown(tvTimeLimited);
break;
default:
break;
}
}
private void initStateSelect() {
statePopupwindow = new PopupWindow(stateWindowView, LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT, true);
statePopupwindow.setAnimationStyle(R.style.AnimationPreview);
statePopupwindow.setOutsideTouchable(true);
statePopupwindow.setBackgroundDrawable(new BitmapDrawable());
ListView stateListView = (ListView) stateWindowView.findViewById(R.id.listView_select_left);
titleAdapter = new CompeteTitleAdapter(this, listState, loc_state);
stateListView.setAdapter(titleAdapter);
statePopupwindow.setOnDismissListener(new OnDismissListener() {
@Override
public void onDismiss() {
llBackgroundGray.setVisibility(View.GONE);
}
});
stateListView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
loc_state = arg2;
statePopupwindow.dismiss();
}
});
}
}
activity_main.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.hwgt.popupwindow.MainActivity" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="#ffffff"
android:divider="@drawable/ic_pop_divider"
android:orientation="horizontal"
android:showDividers="middle" >
<TextView
android:id="@+id/tv_state_limited"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:paddingLeft="17dp"
android:paddingRight="17dp"
android:singleLine="true"
android:text="全部"
android:textColor="#303233"
android:textSize="17dp" />
<TextView
android:id="@+id/tv_time_limited"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:paddingLeft="17dp"
android:paddingRight="17dp"
android:singleLine="true"
android:text="不限"
android:textColor="#303233"
android:textSize="17dp" />
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:id="@+id/ll_background_gray"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:alpha="0.5"
android:background="#55000000"
android:orientation="vertical"
android:visibility="gone" >
</LinearLayout>
</RelativeLayout>
</LinearLayout>
arrays.xml:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name="HandleState">
<item>全部</item>
<item>已提交</item>
<item>已拒绝</item>
<item>已处理</item>
<item>已过期</item>
</string-array>
</resources>
CompeteTitleAdapter.java:
public class CompeteTitleAdapter extends BaseAdapter {
public List<String> list;
private Context context;
private int selected_location = 0;
public CompeteTitleAdapter(Context context, List<String> list, int selected_location) {
this.context = context;
this.list = list;
this.selected_location = selected_location;
}
@Override
public int getCount() {
return list.size();
}
@Override
public Object getItem(int position) {
return list.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
public int getItemViewType(int position, List<String> list) {
if (position == (list.size() - 1) && list.size() > 1)
return 0;
else if (position == 0 && (list.size() == 1)) {
return 2;
} else
return 1;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = LayoutInflater.from(context);
convertView = inflater.inflate(R.layout.listitem_extra_reserve_title, null);
}
TextView tv = (TextView) convertView.findViewById(R.id.myspinner_dropdown_txt);
tv.setText(list.get(position));
if (position == selected_location) {
tv.setTextColor(context.getResources().getColor(R.color.consult_issolved_green));
} else {
tv.setTextColor(context.getResources().getColor(R.color.text_black));
}
return convertView;
}
}
styles.xml:
<style name="AnimationPreview">
<!-- PopupWindow弹出的效果 -->
<item name="android:windowEnterAnimation">@anim/fade_in</item>
<item name="android:windowExitAnimation">@anim/fade_out</item>
</style>
anim-fade_in.xml:
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<scale android:fromXScale="1.0" android:toXScale="1.0"
android:fromYScale="0.0" android:toYScale="1.0" android:pivotX="100%"
android:pivotY="0" android:duration="500" android:fillAfter="false"/>
</set>
anim-fade_out.xml:
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<scale android:fromXScale="1.0" android:toXScale="1.0"
android:fromYScale="1.0" android:toYScale="0.0" android:pivotX="100%"
android:pivotY="0" android:duration="500" />
</set>
state_popupwindow_content_layout.xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/production_factory"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/transparent"
android:orientation="horizontal">
<ListView
android:id="@+id/listView_select_left"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:cacheColorHint="@android:color/transparent"
android:fadingEdge="none"
android:listSelector="@drawable/sel_state_popupwindow_item"
android:background="#e9e9e9">
</ListView>
</LinearLayout>
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