Android为应用添加数字角标的简单实现

<uses-permission android:name="com.sec.android.provider.badge.permission.READ" />
<uses-permission android:name="com.sec.android.provider.badge.permission.WRITE" />

public class BadgeUtils {
  private static final String INTENT_ACTION = "android.intent.action.BADGE_COUNT_UPDATE";
  private static final String INTENT_EXTRA_BADGE_COUNT = "badge_count";
  private static final String INTENT_EXTRA_PACKAGENAME = "badge_count_package_name";
  private static final String INTENT_EXTRA_ACTIVITY_NAME = "badge_count_class_name";

  //设置角标
  public static void setBadgeCount(Context context, int badgeCount) {
    Intent intent = new Intent(INTENT_ACTION);
    intent.putExtra(INTENT_EXTRA_BADGE_COUNT, badgeCount);
    intent.putExtra(INTENT_EXTRA_PACKAGENAME, getComponentName(context).getPackageName());
    intent.putExtra(INTENT_EXTRA_ACTIVITY_NAME, getComponentName(context).getClassName());
    context.sendBroadcast(intent);
  }

  //清除角标
  public static void removeBadge(Context context){
    setBadgeCount(context,0);
  }

  //获取ComponentName
  private static ComponentName getComponentName(Context context) {
    return context.getApplicationContext().getPackageManager()
        .getLaunchIntentForPackage(context.getApplicationContext().getPackageName())
        .getComponent();
  }
}