ApiDemos Clean up

- Add missing @Override
- Remove (some) unused imports
- Add some missing headers

BUG: 2031807

samples/ApiDemos/src/com/example/android/apis/appwidget/ExampleAppWidgetProvider.java

@@ -20,14 +20,11 @@ import android.appwidget.AppWidgetManager;
 import android.appwidget.AppWidgetProvider;
 import android.content.ComponentName;
 import android.content.Context;
-import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.os.SystemClock;
 import android.util.Log;
 import android.widget.RemoteViews;
 
-import java.util.ArrayList;
-
 // Need the following import to get access to the app resources, since this
 // class is in a sub-package.
 import com.example.android.apis.R;
@@ -51,6 +48,7 @@ public class ExampleAppWidgetProvider extends AppWidgetProvider {
     // log tag
     private static final String TAG = "ExampleAppWidgetProvider";
 
+    @Override
     public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
         Log.d(TAG, "onUpdate");
         // For each widget that needs an update, get the text that we should display:
@@ -65,6 +63,7 @@ public class ExampleAppWidgetProvider extends AppWidgetProvider {
         }
     }
     
+    @Override
     public void onDeleted(Context context, int[] appWidgetIds) {
         Log.d(TAG, "onDeleted");
         // When the user deletes the widget, delete the preference associated with it.
@@ -74,6 +73,7 @@ public class ExampleAppWidgetProvider extends AppWidgetProvider {
         }
     }
 
+    @Override
     public void onEnabled(Context context) {
         Log.d(TAG, "onEnabled");
         // When the first widget is created, register for the TIMEZONE_CHANGED and TIME_CHANGED
@@ -87,11 +87,11 @@ public class ExampleAppWidgetProvider extends AppWidgetProvider {
                 PackageManager.DONT_KILL_APP);
     }
 
+    @Override
     public void onDisabled(Context context) {
         // When the first widget is created, stop listening for the TIMEZONE_CHANGED and
         // TIME_CHANGED broadcasts.
         Log.d(TAG, "onDisabled");
-        Class clazz = ExampleBroadcastReceiver.class;
         PackageManager pm = context.getPackageManager();
         pm.setComponentEnabledSetting(
                 new ComponentName("com.example.android.apis", ".appwidget.ExampleBroadcastReceiver"),

samples/ApiDemos/src/com/example/android/apis/appwidget/ExampleBroadcastReceiver.java

@@ -17,21 +17,13 @@
 package com.example.android.apis.appwidget;
 
 import android.appwidget.AppWidgetManager;
-import android.appwidget.AppWidgetProvider;
 import android.content.BroadcastReceiver;
-import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
-import android.os.SystemClock;
 import android.util.Log;
-import android.widget.RemoteViews;
 
 import java.util.ArrayList;
 
-// Need the following import to get access to the app resources, since this
-// class is in a sub-package.
-import com.example.android.apis.R;
-
 /**
  * A BroadcastReceiver that listens for updates for the ExampleAppWidgetProvider.  This
  * BroadcastReceiver starts off disabled, and we only enable it when there is a widget
@@ -39,6 +31,7 @@ import com.example.android.apis.R;
  */
 public class ExampleBroadcastReceiver extends BroadcastReceiver {
 
+    @Override
     public void onReceive(Context context, Intent intent) {
         Log.d("ExmampleBroadcastReceiver", "intent=" + intent);
 
@@ -48,8 +41,8 @@ public class ExampleBroadcastReceiver extends BroadcastReceiver {
         if (action.equals(Intent.ACTION_TIMEZONE_CHANGED)
                 || action.equals(Intent.ACTION_TIME_CHANGED)) {
             AppWidgetManager gm = AppWidgetManager.getInstance(context);
-            ArrayList<Integer> appWidgetIds = new ArrayList();
-            ArrayList<String> texts = new ArrayList();
+            ArrayList<Integer> appWidgetIds = new ArrayList<Integer>();
+            ArrayList<String> texts = new ArrayList<String>();
 
             ExampleAppWidgetConfigure.loadAllTitlePrefs(context, appWidgetIds, texts);