ExampleAppWidgetConfigure.java
ExampleBroadcastReceiver.java
res/layout/appwidget_configure.xml
res/layout/appwidget_provider.xml
res/xml/appwidget_provider.xml

public class ExampleAppWidgetProvider extends AppWidgetProvider {

private static final String TAG = "ExampleAppWidgetProvider"; //logcat调试信息
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
Log.d(TAG, "onUpdate");

// - 创建一个RemoteViews 对象
// - 设置RemoteViews 对象的文本
// - 告诉AppWidgetManager 显示 views对象给widget.
final int N = appWidgetIds.length;
for (int i=0; i public void onEnabled(Context context) {
Log.d(TAG, "onEnabled");
// 当widget创建时注册TIMEZONE_CHANGED和 TIME_CHANGED改变的广播获取这些时间和区域的改变事件

PackageManager pm = context.getPackageManager();
pm.setComponentEnabledSetting(
new ComponentName("com.example.android.apis", ".appwidget.ExampleBroadcastReceiver"),
PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
PackageManager.DONT_KILL_APP);
}
public void onDisabled(Context context) {

Log.d(TAG, "onDisabled");
Class clazz = ExampleBroadcastReceiver.class;
PackageManager pm = context.getPackageManager();
pm.setComponentEnabledSetting(
new ComponentName("com.example.android.apis", ".appwidget.ExampleBroadcastReceiver"),
PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
PackageManager.DONT_KILL_APP);
}
static void updateAppWidget(Context context, AppWidgetManager appWidgetManager,
int appWidgetId, String titlePrefix) {
Log.d(TAG, "updateAppWidget appWidgetId=" + appWidgetId + " titlePrefix=" + titlePrefix);

CharSequence text = context.getString(R.string.appwidget_text_format,
ExampleAppWidgetConfigure.loadTitlePref(context, appWidgetId),
"0x" + Long.toHexString(SystemClock.elapsedRealtime()));
RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.appwidget_provider);
views.setTextViewText(R.id.appwidget_text, text);
appWidgetManager.updateAppWidget(appWidgetId, views);
}
}

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;

import com.example.android.apis.R;

public class ExampleBroadcastReceiver extends BroadcastReceiver {
public void onReceive(Context context, Intent intent) {
Log.d("ExmampleBroadcastReceiver", "intent=" + intent);
// For our example, we'll also update all of the widgets when the timezone
// changes, or the user or network sets the time.
String action = intent.getAction();
if (action.equals(Intent.ACTION_TIMEZONE_CHANGED)
|| action.equals(Intent.ACTION_TIME_CHANGED)) {
AppWidgetManager gm = AppWidgetManager.getInstance(context);
ArrayList appWidgetIds = new ArrayList();
ArrayList texts = new ArrayList();
ExampleAppWidgetConfigure.loadAllTitlePrefs(context, appWidgetIds, texts);
final int N = appWidgetIds.size();
for (int i=0; i}