Question

不同的手机和供应商有不同的时钟应用程序。代码可用，打开一些手机的应用程序。不同的答案给出了不同的列表和策略，他们经常遇到问题。

Answer 1

点击小部件时打开时钟应用程序的可靠方式。

此代码描述了如何通过单击窗口小部件打开警报或台钟应用程序。它解决了其他解决方案的可靠性问题。它通过使用共享首选项来增加电力经济性。

找到手机应用的代码放在onEnabled中。它找到应用程序然后将信息保存在共享首选项中，由更新服务调用。找到第一个包后，它就会停止搜索。如果要同时搜索警报和桌面时钟，请将首选选项放在数组列表的较高位置。每次更新小部件时都不会执行此搜索，从而节省了电量。如果您的小部件经常更新，这将对电池寿命产生影响。

如果您认为用户可能更改其警报应用程序，则可以将onEnabled代码放在WidgetProvider类中的单独方法中。然后从onEnabled调用它，并在检测到用户时钟包的更改时调用它。

WIDGET PROVIDER CLASS

public class WidgetProvider扩展AppWidgetProvider {

public static final String SHARED_PREFS = "SharedPrefs";
private PendingIntent pendingIntent = null;

@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {

    // start UpdateService whenever onUpdate is called
    Intent sIntent = new Intent(context, UpdateService.class);
    sIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    context.startService(sIntent);
}

@Override
public void onEnabled(Context context) {
    super.onEnabled(context);
    Log.w(LOG, "WidgetProvider.onEnabled triggered");

    // find the local alarm service

    // this is an incomplete array of alarm+clock services,
    // in an arbitrary order of priority.
    // you may need to change the order to suit your requirements
    String clockImpls[][] = {
     { "Standard Alarm", "com.android.alarmclock", "com.android.alarmclock.AlarmClock" },
     { "Sony Alarm", "com.sonyericsson.alarm", "com.sonyericsson.alarm.Alarm" },
     { "Sony Ericsson Xperia Z", "com.sonyericsson.organizer", "com.sonyericsson.organizer.Organizer_WorldClock" },
     { "ASUS Alarm Clock", "com.asus.alarmclock", "com.asus.alarmclock.AlarmClock" },
     { "ASUS Desk Clock", "com.asus.deskclock", "com.asus.deskclock.DeskClock" },
     { "HTC Alarm ClockDT", "com.htc.android.worldclock", "com.htc.android.worldclock.WorldClockTabControl" },
     { "Standard Alarm ClockDT", "com.android.deskclock", "com.android.deskclock.AlarmClock" },
     { "Froyo Nexus Alarm ClockDT", "com.google.android.deskclock", "com.android.deskclock.DeskClock" },
     { "Moto Blur Alarm ClockDT", "com.motorola.blur.alarmclock", "com.motorola.blur.alarmclock.AlarmClock" },
     { "Samsung Galaxy S", "com.sec.android.app.clockpackage", "com.sec.android.app.clockpackage.ClockPackage" }      
    };

    PackageManager packageManager = context.getPackageManager();
    Intent alarmClockIntent = new Intent(Intent.ACTION_MAIN).addCategory(Intent.CATEGORY_LAUNCHER);
    boolean foundClockImpl = false;
    String vendorName = "";
    String packageName = "";
    String className = "";

    for(int i=0; i<clockImpls.length; i++) {
        vendorName = clockImpls[i][0]; // not needed, for debugging only
        packageName = clockImpls[i][1];
        className = clockImpls[i][2];
        try {
            ComponentName cn = new ComponentName(packageName, className);
            packageManager.getActivityInfo(cn, PackageManager.GET_META_DATA);
            alarmClockIntent.setComponent(cn);
            foundClockImpl = true;
        } catch (PackageManager.NameNotFoundException e) {
            // Log.w(LOG, "AlarmService couldnt retrieve activity info");
        }
        if (foundClockImpl) {
            // when the first package is found
            // send alarmCLockIntent to Shared Preferences
            // and break out of the for loop
            SharedPreferences settings = context.getSharedPreferences(SHARED_PREFS, 0);
            SharedPreferences.Editor editor = settings.edit();
            editor.putString("VendorName", vendorName); // only needed for debugging
            editor.putString("PackageName", packageName);
            editor.putString("ClassName", className);
            // Commit the edits!
            editor.commit();
            break;  // stop searching to avoid setting less suitable options
        }
    }
}

时钟应用程序阵列不完整，它包括一些常见的供应商。将有些设备没有这些应用程序。您可以将其他供应商的应用程序放在注释中，我会将它们编辑到数组中。我使用了应用程序＆＃34; System Tuner＆＃34;找到我的设备的包裹信息。

放置第一个小部件时，包信息已保存在“共享首选项”中。然后，每次更新窗口小部件时，UpdateService都会调用此信息以创建挂起的意图。建议：每次更新时，更新所有待处理的意图和任何其他远程视图更新。这样可以防止重启或更改方向等问题。

更新服务类

公共类UpdateService扩展了服务{

public static final String SHARED_PREFS = "SharedPrefs";
private PendingIntent pendingIntent = null;

@Override
public int onStartCommand(Intent intent, int flags, int startId) {

    // retrieve data from shared preferences
    SharedPreferences settings = getSharedPreferences(SHARED_PREFS, 0);
    // retrieve all your preferences each time, update everything
    int background = settings.getInt("Background", R.drawable.bg_box_light);
    // if cannot retrieve, set default to standard package
    // if it is not available, widget click will do nothing.
    String packageName = settings.getString("PackageName", "com.android.alarmclock");
    String className = settings.getString("ClassName", "com.android.alarmclock.AlarmClock");

    // get appwidgetmanager instance for all widgets
    AppWidgetManager localAppWidgetManager = AppWidgetManager.getInstance(this);

    // set up openAlarm PI
    PackageManager packageManager = this.getPackageManager();
    Intent alarmClockIntent = new Intent(Intent.ACTION_MAIN).addCategory(Intent.CATEGORY_LAUNCHER);
    // construct pending intent from retrieved package info
    try {
        ComponentName cn = new ComponentName(packageName, className);
        packageManager.getActivityInfo(cn, PackageManager.GET_META_DATA);
        alarmClockIntent.setComponent(cn);
    } catch (PackageManager.NameNotFoundException e) {
        // Log or debug message
    }
    PendingIntent alarmPI = PendingIntent.getActivity(this, 0, alarmClockIntent, 0);

    // update all widget instances
    ComponentName thisWidget = new ComponentName(getBaseContext(), WidgetProvider.class);
    int[] allWidgetIds = localAppWidgetManager.getAppWidgetIds(thisWidget);
    for (int widgetId : allWidgetIds) {
        RemoteViews remoteViews = new RemoteViews(getPackageName(), R.layout.widget_layout_name);
        // update EVERYTHING, EVERY TIME.
        // whatever is not updated may revert to the initial layout settings
        remoteViews.setImageViewResource(R.id.imageviewBG, background);
        remoteViews.setOnClickPendingIntent(R.id.analogClock, alarmPI);
        localAppWidgetManager.updateAppWidget(widgetId, remoteViews);
    }

如果您有多个窗口小部件提供程序，只需为每个提供程序复制从//update all widget instances开始的代码，然后更改widget_layout_name。此代码以相同方式更新所有不同的窗口小部件布局。如果要允许不同的窗口小部件布局具有不同的首选项，则可以更改代码以实现此目的 - 为每个窗口小部件布局创建唯一标识符，并为每个布局设置一组共享首选项。

android：点击小工具打开闹钟或时钟应用

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