（4.1.27.1）Android之桌面组件App Widget案例
- resxml
- reslayout
- AndroidManifestxml
- AppWidgetProvider
- Service
下载地址：http://pan.baidu.com/s/1hqpjrpi
res/xml
<?xml version="1.0" encoding="utf-8"?>
<!-- 指定该桌面组件的基本配置信息： initialLayout：初始时显示的布局 minWidth：桌面小控件的最小高度。 minWidth：桌面小控件的最小宽度。 updatePeriodMillis：更新频率 -->
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android" android:initialLayout="@layout/main" android:minHeight="150dp" android:minWidth="300dp" android:updatePeriodMillis="0" >
</appwidget-provider>res/layout
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/bg" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:background="@drawable/ww_bg" android:orientation="vertical" >
<LinearLayout android:id="@+id/time" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:orientation="horizontal" >
<LinearLayout android:id="@+id/linearLayout1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/wd_bg" android:orientation="horizontal" >
<ImageView android:id="@+id/h1" android:layout_width="wrap_content" android:layout_height="fill_parent" android:paddingLeft="10dip" android:src="@drawable/n0" />
<ImageView android:id="@+id/h2" android:layout_width="wrap_content" android:layout_height="fill_parent" android:src="@drawable/n0" />
</LinearLayout>
<TextView android:layout_width="30dip" android:layout_height="wrap_content" />
<LinearLayout android:id="@+id/linearLayout2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/wd_bg" android:orientation="horizontal" >
<ImageView android:id="@+id/m1" android:layout_width="wrap_content" android:layout_height="match_parent" android:paddingLeft="10dip" android:src="@drawable/n0" />
<ImageView android:id="@+id/m2" android:layout_width="wrap_content" android:layout_height="match_parent" android:src="@drawable/n0" />
</LinearLayout>
</LinearLayout>
<LinearLayout android:id="@+id/linearLayout3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:gravity="center" android:orientation="horizontal" >
<LinearLayout android:layout_width="100dip" android:layout_height="wrap_content" android:orientation="vertical" android:paddingLeft="10dip" >
<TextView android:id="@+id/city" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textColor="#000000" android:textSize="20sp" />
<TextView android:id="@+id/condition" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/neterror" android:textColor="#000000" android:textSize="18sp" />
</LinearLayout>
<ImageView android:id="@+id/weather" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal|top" android:src="@drawable/sunny" />
<LinearLayout android:layout_width="100dip" android:layout_height="wrap_content" android:gravity="right" android:orientation="vertical" android:paddingRight="10dip" >
<TextView android:id="@+id/date" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textColor="#000000" android:textSize="18sp" />
<TextView android:id="@+id/tem" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/neterror" android:textColor="#000000" android:textSize="18sp" />
</LinearLayout>
</LinearLayout>
</LinearLayout>AndroidManifest.xml
<receiver android:name="com.way.apptest.App" >
<!-- 指定桌面小控件的meta-data -->
<meta-data android:name="android.appwidget.provider" android:resource="@xml/app" />
<!-- 将该BroadcastReceiver当成桌面小控件 -->
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
</intent-filter>
</receiver>
<service android:name=".UpdateService" >
</service>AppWidgetProvider
public class App extends AppWidgetProvider {
private Intent intent;
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager,
int[] appWidgetIds) {
intent = new Intent(context, UpdateService.class);
context.startService(intent);
super.onUpdate(context, appWidgetManager, appWidgetIds);
}
@Override
public void onDeleted(Context context, int[] appWidgetIds) {
intent = new Intent(context, UpdateService.class);
context.stopService(intent);
super.onDeleted(context, appWidgetIds);
}
}Service
/** * @author way */
public class UpdateService extends Service {
private static final int UPDATE = 0x123;
private RemoteViews remoteViews;
// 数字时间图片资源数组
private int[] imgs = { R.drawable.n0, R.drawable.n1, R.drawable.n2,
R.drawable.n3, R.drawable.n4, R.drawable.n5, R.drawable.n6,
R.drawable.n7, R.drawable.n8, R.drawable.n9, };
// 将显示小时、分钟的ImageView定义成数组
private int[] dateViews = { R.id.h1, R.id.h2, R.id.m1, R.id.m2 };
// 按照中国天气网的天气图片顺序排列好本地资源图片，我这里是随意的~嘿嘿
private int[] weatherImg = { R.drawable.sunny, R.drawable.cloudy,
R.drawable.chance_of_rain, R.drawable.chance_of_sleet,
R.drawable.chance_of_snow, R.drawable.chance_of_storm,
R.drawable.clock1, R.drawable.fog, R.drawable.haze,
R.drawable.mist, R.drawable.mostly_sunny, R.drawable.mostly_cloudy,
R.drawable.lower, R.drawable.middle };
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case UPDATE:
// 更新天气
updateTime();
updateWeather();
break;
}
}
};
// 广播接收者去接收系统每分钟的提示广播，来更新时间
private BroadcastReceiver mTimePickerBroadcast = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
updateTime();
}
};
private void updateWeather() {
// Weather w = new GetWeather().googleWeather();
// if (w != null) {
// System.out.println("当前天气：" + w.getWeather() + ":" + w.getTemp_c()
// + ":" + w.getIcon());
remoteViews.setTextViewText(R.id.condition, MyWeather.weather1);
remoteViews.setTextViewText(R.id.tem, (MyWeather.temp1));
// 根据图片名，获取天气图片资源
// remoteViews.setImageViewResource(
// R.id.weather,
// getApplicationContext().getResources().getIdentifier(
// w.getIcon(), "drawable", "com.way.apptest"));
if (MyWeather.img1 != null || !"".equals(MyWeather.img1))
remoteViews.setImageViewResource(R.id.weather,
weatherImg[Integer.parseInt(MyWeather.img1)]);
// 执行更新
ComponentName componentName = new ComponentName(
getApplicationContext(), App.class);
AppWidgetManager.getInstance(getApplicationContext()).updateAppWidget(
componentName, remoteViews);
}
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onCreate() {
super.onCreate();
remoteViews = new RemoteViews(getApplication().getPackageName(),
R.layout.main);// 实例化RemoteViews
if (isNetworkAvailable()) {
MyWeather.getWeather();// json解析中国天气网天气
} else {
toast();
}
updateTime();// 第一次运行时先更新一下时间和天气
updateWeather();
// 点击天气图片，进入MainActivity
Intent intent = new Intent(getApplicationContext(), MainActivity.class);
PendingIntent pi = PendingIntent.getActivity(getApplicationContext(),
0, intent, 0);
remoteViews.setOnClickPendingIntent(R.id.weather, pi);
// 定义一个定时器去更新天气。实际开发中更新时间间隔可以由用户设置，
new Timer().scheduleAtFixedRate(new TimerTask() {
@Override
public void run() {
Message msg = handler.obtainMessage();
msg.what = UPDATE;
handler.sendMessage(msg);
}
}, 1, 3600 * 1000);// 每小时更新一次天气
}
private void updateTime() {
Date date = new Date();
// 定义SimpleDateFormat对象
SimpleDateFormat df = new SimpleDateFormat("HHmm");
// 将当前时间格式化成HHmm的形式
String timeStr = df.format(date);
for (int i = 0; i < timeStr.length(); i++) {
// 将第i个数字字符转换为对应的数字
int num2 = Integer.parseInt(timeStr.substring(i, i + 1));
// 将第i个图片的设为对应的数字图片
remoteViews.setImageViewResource(dateViews[i], imgs[num2]);
}
remoteViews.setTextViewText(R.id.city, MyWeather.city);
remoteViews.setTextViewText(R.id.date, "0" + (date.getMonth() + 1)
+ "-" + date.getDate() + " 周" + date.getDay());
ComponentName componentName = new ComponentName(getApplication(),
App.class);
AppWidgetManager.getInstance(getApplication()).updateAppWidget(
componentName, remoteViews);
}
@Override
public void onStart(Intent intent, int startId) {
// 注册系统每分钟提醒广播（注意：这个广播只能在代码中注册）
IntentFilter updateIntent = new IntentFilter();
updateIntent.addAction("android.intent.action.TIME_TICK");
registerReceiver(mTimePickerBroadcast, updateIntent);
super.onStart(intent, startId);
}
@Override
public void onDestroy() {
// 注销系统的这个广播
unregisterReceiver(mTimePickerBroadcast);
//被系统干掉后，服务重启,做一次流氓软件,哈哈
Intent intent = new Intent(getApplicationContext(), UpdateService.class);
getApplication().startService(intent);
super.onDestroy();
}
/** * 判断手机网络是否可用 * * @param context * @return */
private boolean isNetworkAvailable() {
ConnectivityManager mgr = (ConnectivityManager) getApplicationContext()
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo[] info = mgr.getAllNetworkInfo();
if (info != null) {
for (int i = 0; i < info.length; i++) {
if (info[i].getState() == NetworkInfo.State.CONNECTED) {
return true;
}
}
}
return false;
}
private void toast() {
new AlertDialog.Builder(getApplicationContext())
.setTitle("提示")
.setMessage("网络连接未打开")
.setPositiveButton("前往打开",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
Intent intent = new Intent(
android.provider.Settings.ACTION_WIRELESS_SETTINGS);
startActivity(intent);
}
}).setNegativeButton("取消", null).create().show();
}
}