The Appwidget advanced effect _android of Android learning

Then appwidget Basic Learning, today is a "advanced version" of the small example, used to test their own learning effects. So I made a roll of the dice widget.

Convenient for everyone to watch, the first screenshot is as follows:

Note that in the Drawable folder there are several pictures, I was downloaded on the Internet of other people's material.

Now let's start our study tour.

First step:
is to create a folder named XML in the res/directory (in fact, the name is random, do not have to adhere to this name), and then create a appwidget_info.xml file inside, its role is to declare to the system.

<appwidget-provider
  xmlns:android= "http://schemas.android.com/apk/res/android"
  android:minheight= " 72DP "
  android:minwidth=" 294DP "
  android:updateperiodmillis=" 86400000 "
  android:initiallayout=" @ Layout/app_widget_layout "
  >
</appwidget-provider>

Step Two:
To set the layout interface, I set the following App_widget_layout.xml file:

<?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:o" rientation= "vertical" >

  <imageview 
    android:id= "@+id/imageview_widget"
    Match_parent "
    android:layout_height=" wrap_content "
    android:src=" @drawable/ic_launcher "
    />
  <button 
    android:id= "@+id/button_widget"
    android:layout_width= "Match_parent"
    android: layout_height= "Wrap_content"
    android:gravity= "center"
    android:text= "Shake"
    android:textcolor= "# 6663c6 "
    />


</LinearLayout>

Step Three:
Create a class that supports widgets to complete the next logical operation, such as the Widgetprovider.java below.

Package com.summer.mywidget;
Import android.app.PendingIntent;
Import Android.appwidget.AppWidgetManager;
Import Android.appwidget.AppWidgetProvider;
Import Android.content.ComponentName;
Import Android.content.Context;
Import android.content.Intent;
Import Android.util.Log;

Import Android.widget.RemoteViews; public class Widgetprovider extends appwidgetprovider{private static final String my_update_action= "Com.summer.APP_WID

  Get_action "; * * Random to get a picture of the int value, for the next transformation of the image of the foundation * * private static int getrandompicture () {int[] picturearray=new int[]{r.drawabl
    E.dice_1,r.drawable.dice_2,r.drawable.dice_3, r.drawable.dice_4,r.drawable.dice_5,r.drawable.dice_6};

    int randomnumber= (int) ((Math.random () *100)%6);
  return Picturearray[randomnumber]; * * * is used to receive action, branching is an effective way to differentiate between custom action and system action * * @Override public void onreceive, Intent inten
    T) {//TODO auto-generated method Stub String responseaction=intent.getaction (); LOG.I ("Summer", "------------->>>>>>>>>>>>>>>>>>>>>

    >>>>>>>> "+responseaction); if (My_update_action.equals (responseaction)) {remoteviews remoteviews=new remoteviews (),

      R.layout.app_widget_layout);

      Remoteviews.setimageviewresource (R.id.imageview_widget,getrandompicture ());
      Appwidgetmanager appwidgetmanager=appwidgetmanager.getinstance (context);
      ComponentName componentname=new componentname (context,widgetprovider.class);
    Appwidgetmanager.updateappwidget (ComponentName, remoteviews);
    }else{super.onreceive (context, intent); }/* * A loop is used to respond to the addition of several such widgets on the desktop * * @Override public void onUpdate (context, Appwidgetmanage R Appwidgetmanager, int[] appwidgetids) {//TODO auto-generated method stub for (int i=0;i<appwidgetids.
      length;i++) {Intent intent=new Intent (); Intent.setaction (My_updatE_action);

      Pendingintent Pendingintent=pendingintent.getbroadcast (context,-1, intent, 0);
      Remoteviews remoteviews=new remoteviews (Context.getpackagename (), r.layout.app_widget_layout);
      Remoteviews.setonclickpendingintent (r.id.button_widget,pendingintent);
    Appwidgetmanager.updateappwidget (Appwidgetids[i], remoteviews);
  } super.onupdate (Context, Appwidgetmanager, appwidgetids); @Override public void ondeleted (context context, int[] appwidgetids) {//TODO auto-generated method stub s
    Uper.ondeleted (context, appwidgetids);
  System.out.println ("My app widget----------------------------->>>>>>>ondeleted"); @Override public void onenabled (context context) {//TODO auto-generated the method stub System.out.println ("
    My app widget----------------------------->>>>>>>onenabled ");
  super.onenabled (context); @Override public void ondisabled (context context) {//TODO auto-generated method Stub System.out.println ("The My app widget----------------------------->>>>>>>
    Ondisabled ");
  super.ondisabled (context);

 }


}

  Fourth:
The declaration of related items in the manifest file Manifest.xml file. Details are as follows:

<?xml version= "1.0" encoding= "Utf-8"?> <manifest xmlns:android= "http://schemas.android.com/apk/res/" Android "package=" Com.summer.mywidget "android:versioncode=" 1 "android:versionname=" 1.0 "> <uses-sdk droid:minsdkversion= "8" android:targetsdkversion= "a"/> <application android:allowbackup= "true" Andr oid:icon= "@drawable/ic_launcher" android:label= "@string/app_name" android:theme= "@style/apptheme" > <act Ivity android:name= "com.summer.mywidget.MainActivity" android:label= "@string/app_name" > <intent-f ilter> <action android:name= "Android.intent.action.MAIN"/> <category "android:name=" Ntent.category.LAUNCHER "/> </intent-filter> </activity> <receiver android:name=" c Om.summer.mywidget.WidgetProvider "> <intent-filter > <action android:name=" android.appwidget.act Ion. Appwidget_update "/> </intent-filter> <intent-filter > <action android:name= "Com.summer.APP_WIDGET_ACTION" ></act ion> </intent-filter> <meta-data android:name= "Android.appwidget.provider" Android : resource= "@xml/appwidget_info" > </meta-data> </receiver> </application> &LT;/MANIFEST&G

 T

Fifth Step:
Done, run the code, and then manually add App_widget, then you can have a "dice" slightly.

Summary:

This small program, although implemented, is still not more complex. Need to have a certain understanding of the knowledge of broadcast news and so on.
Improved direction: Add animation to the completion of each click event to gain a better user experience. (Requires the help of the relevant methods within Remoteviews).
The code will inevitably appear some errors and deficiencies, I hope that the vast number of Bo friends to see after the point, I hope to progress with you!