PopupWindow is under the Android.widget package. PopupWindow is often used in projects as a menu option. The PopupWindow class is used to implement a pop-up box, which can use any layout of View as its content. This pop-up box is suspended above the current activity. .
Effect picture:
MainActivity.java
public class MainActivity extends Activityimplements OnClickListener {
private PopupWindow mPopWindow;
private View parentView;
private Context context;
ImageView mImageViewBar;
@Override
protected voidonCreate(Bundle savedInstanceState) {
super.onCreate (savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
context = this;
initView();
}
private void initView() {
// TODOAuto-generated method stub
parentView =getLayoutInflater().inflate(R.layout.activity_main,null);
mImageViewBar =(ImageView) findViewById(R.id.menu);
mImageViewBar.setOnClickListener(this);
showPopupWindow();
}
private void showPopupWindow() {
LayoutInflater inflater = (LayoutInflater)context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View contentView =inflater.inflate(R.layout.popuplayout,null);
mPopWindow = newPopupWindow(contentView);
mPopWindow.setWidth(ViewGroup.LayoutParams.WRAP_CONTENT);
mPopWindow.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
mPopWindow = newPopupWindow();
// Set the View of SelectPicPopupWindow
mPopWindow.setContentView(contentView);
// Set the width of the SelectPicPopupWindow popup form
mPopWindow.setWidth(LayoutParams.WRAP_CONTENT);
// Set the height of the SelectPicPopupWindow popup form
mPopWindow.setHeight(LayoutParams.WRAP_CONTENT);
// Set the SelectPicPopupWindow popup form to be clickable
mPopWindow.setFocusable(true);
mPopWindow.setOutsideTouchable(true);
// refresh state
mPopWindow.update();
// Instantiate a ColorDrawable with a semi-transparent color
ColorDrawable dw = new ColorDrawable(0000000000);
// Click the back key and other places to make it disappear, set this to trigger OnDismisslistener, set other control changes, etc.
mPopWindow.setBackgroundDrawable(dw);
contentView.findViewById(R.id.memu1).setOnClickListener(this);
contentView.findViewById(R.id.memu2).setOnClickListener(this);
contentView.findViewById(R.id.memu3).setOnClickListener(this);
}
@Override
public void onClick(View v) {
int id =v.getId();
switch (id) {
case R.id.menu:
mPopWindow.showAsDropDown (mImageViewBar);
break;
case R.id.memu1: {
Toast.makeText(context,"消息", Toast.LENGTH_SHORT).show();
mPopWindow.dismiss();
}
break;
case R.id.memu2: {
Toast.makeText(context,"收藏", Toast.LENGTH_SHORT).show();
mPopWindow.dismiss();
}
break;
case R.id.memu3: {
Toast.makeText(context,"首页", Toast.LENGTH_SHORT).show();
mPopWindow.dismiss();
}
break;
}
}
@Override
protected void onDestroy() {
// TODOAuto-generated method stub
super.onDestroy ();
mPopWindow.dismiss();
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FFFFFF"
android:orientation="vertical">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#E4E4E4"
android:minHeight="55dp">
<ImageView
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_centerVertical="true"
android:layout_marginLeft="8dp"
android:layout_marginRight="5dp"
android:focusable="true"
android:src="@drawable/abc_ic_ab_back_mtrl_am_alpha"/>
<ImageView
android:id="@+id/menu"
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="9dp"
android:src="@drawable/top_arrow_message1"/>
</RelativeLayout>
</LinearLayout>
popuplayout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical">
<LinearLayout
android:layout_width="120dp"
android:layout_height="130dp"
android:layout_marginRight="2dp"
android:background="@drawable/danchu"
android:gravity="center_vertical"
android:orientation="vertical">
<RelativeLayout
android:id="@+id/memu1"
android:layout_width="wrap_content"
android:layout_height="30dp"
android:layout_marginTop="5dp"
android:gravity="center_vertical">
<ImageView
android:id="@+id/xiaoxi"
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_marginLeft="10dp"
android:src="@drawable/android_arrow_application"/>
<TextView
android:id="@+id/pop_computer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_toRightOf="@+id/xiaoxi"
android:text="message"
android:textColor="#FFFFFF"/>
</RelativeLayout>
<View
android:layout_width="wrap_content"
android:layout_height="1dp"/>
<RelativeLayout
android:id="@+id/memu2"
android:layout_width="wrap_content"
android:layout_height="30dp"
android:layout_marginTop="5dp"
android:gravity="center_vertical">
<ImageView
android:id="@+id/shanchu"
android:layout_width="20dp"
android:layout_height="20dp"
android:layout_marginLeft="10dp"
android:src="@drawable/android_arrow_profitbillsm"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_toRightOf="@+id/shanchu"
android:text="Favorites"
android:textColor="#FFFFFF"/>
</RelativeLayout>
<View
android:layout_width="wrap_content"
android:layout_height="1dp"/>
<RelativeLayout
android:id="@+id/memu3"
android:layout_width="wrap_content"
android:layout_height="30dp"
android:layout_marginBottom="5dp"
android:layout_marginTop="5dp"
android:gravity="center_vertical">
<ImageView
android:id="@+id/dianjifanhui"
android:layout_width="18dp"
android:layout_height="20dp"
android:layout_marginLeft="10dp"
android:src="@drawable/dir15"/>
<TextView
android:id="@+id/pop_manage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_toRightOf="@+id/dianjifanhui"
android:text="Home"
android:textColor="#FFFFFF"/>
</RelativeLayout>
<View
android:layout_width="wrap_content"
android:layout_height="1dp"/>
</LinearLayout>
</LinearLayout>