Introduction to Android Popupwindow Usage Example Analysis _android

This example describes the Popupwindow dialog box. Popupwindow is a blocking dialog box that can only be executed if the external thread or Popupwindow itself does an exit operation. Popupwindow rely entirely on layout to do the appearance, in the common development, Popupwindow should be with alertdialog often mix.

First, post the result diagram that runs in this example:

Main.xml source code is as follows:

<?xml version= "1.0" encoding= "Utf-8"?> <linearlayout xmlns:android=
"http://schemas.android.com/apk/" Res/android "
  android:orientation=" vertical "
  android:layout_width=" fill_parent "
  android:layout_" height= "Fill_parent"
  >
<button android:id= "@+id/button01" android:layout_height= "Wrap_content" Android:layout_width= "Fill_parent" android:text= "Popupwindow demo" ></Button>
</LinearLayout>

The following picture shows a screenshot of Popupwindow, where the Popupwindow is a login box, the point "OK" is automatically filled out, the point "Cancel" closes the Popupwindow.

Popupwindow.xml source code is as follows:

<?xml version= "1.0" encoding= "Utf-8"?> <linearlayout xmlns:android= "http://schemas.android.com/apk/res/" Android "Android:layout_width=" Fill_parent "android:layout_height=" wrap_content "android:orientation=" vertical " android:background= "#000000" > <textview android:id= "@+id/username_view android:layout_height=" wrap_content "Android:layout_marginleft=" 20dip "android:layout_marginright=" 20dip "android:text=" username "android:textappearance=" ? android:attr/textappearancemedium "android:layout_width=" fill_parent "/> <edittext android:id=" @+id/ Username_edit "android:layout_height=" wrap_content "android:layout_width=" Fill_parent "android:layout_marginLeft=" "20dip" android:layout_marginright= "20dip" android:capitalize= "None" android:textappearance= "? android:attr/
 Textappearancemedium "/> <textview android:id= @+id/password_view" android:layout_height= "Wrap_content" android:layout_marginleft= "20dip" android:layout_marginright= "20dip" android:text= "password" AndrOid:textappearance= "Android:attr/textappearancemedium" android:layout_width= "fill_parent"/> <EditText Android:id= "@+id/password_edit" android:layout_height= "wrap_content" android:layout_width= "Fill_parent" Android:
 layout_marginleft= "20dip" android:layout_marginright= "20dip" android:capitalize= "None" android:password= "true" Android:textappearance= "? Android:attr/textappearancemedium"/> <linearlayout android:id= "@+id/ LinearLayout01 "android:layout_height=" wrap_content "android:layout_width=" fill_parent "android:gravity=" "Center" ><button android:layout_width= "wrap_content" android:layout_height= "wrap_content" android:id= "@+id/BtnOK" android:layout_weight= "android:text=" "OK" ></button><button android:layout_width= "Wrap_content" android:layout_height= "Wrap_content" android:layout_weight= "android:text=" "Cancel" android:id= "@+id/BtnCancel"

 ></Button></LinearLayout> </LinearLayout>

Next is the Java program source code:

Package com.testalertdialog;
Import android.app.Activity;
Import Android.app.AlertDialog;
Import Android.content.Context;
Import Android.content.DialogInterface;
Import Android.os.Bundle;
Import android.text.Editable;
Import android.view.Gravity;
Import Android.view.LayoutInflater;
Import Android.view.View;
Import Android.view.View.OnClickListener;
Import Android.widget.Button;
Import Android.widget.EditText;


Import Android.widget.PopupWindow;
  public class Testalertdialog extends activity {Button Btnpopupwindow; /** called the activity is a.
    * * @Override public void onCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);
    Setcontentview (R.layout.main);
    Define button btnpopupwindow= (buttons) This.findviewbyid (R.id.button01);
  Btnpopupwindow.setonclicklistener (New Clickevent ()); ///Unified Processing key event class Clickevent implements onclicklistener{@Override public void OnClick (View v) {//T
 Odo auto-generated Method stub  if (V==btnpopupwindow) {Showpopupwindow (Testalertdialog.this, TestAlertDialog.this.findViewById (r.id.button0
   1)); }} public void Showpopupwindow (context Context,view parent) {Layoutinflater Inflater = (layoutinflater) c  
   Ontext.getsystemservice (Context.layout_inflater_service);
   Final View vpopupwindow=inflater.inflate (R.layout.popupwindow, NULL, FALSE);

   Final Popupwindow pw= new Popupwindow (vpopupwindow,300,300,true);
    OK button and its Processing event button btnok= (button) Vpopupwindow.findviewbyid (R.id.btnok); Btnok.setonclicklistener (New Onclicklistener () {@Override public void OnClick (View v) {//Set text box content EditText edtus
    Ername= (EditText) Vpopupwindow.findviewbyid (R.id.username_edit);
    Edtusername.settext ("username");
    EditText edtpassword= (EditText) Vpopupwindow.findviewbyid (R.id.password_edit);
  Edtpassword.settext ("password");
    
   }
    });
   Cancel button and its Processing event button btncancel= (button) Vpopupwindow.findviewbyid (R.id.btncancel); Btncancel.setonclicklistener (New Onclicklistener () {@Override public void OnClick (View v) {Pw.dismiss ();//Close}
    });
 Displays the Popupwindow dialog box Pw.showatlocation (parent, gravity.center, 0, 0); }
}