import java.lang.reflect.Field;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.os.Build;
import android.widget.Toast;
/**
 * 应用启动图标未读消息数显示 工具类 (效果如:QQ、微信、未读短信 等应用图标)<br/>
 * 依赖于第三方手机厂商(如:小米、三星)的Launcher定制、原生系统不支持该特性<br/>
 * 该工具类 支持的设备有 小米、三星、索尼【其中小米、三星亲测有效、索尼未验证】
 * @author ice_zhengbin@163.com
 *
 */
public class BadgeUtil {
 /**
 * Set badge count<br/>
 * 针对 Samsung / xiaomi / sony 手机有效
 * @param context The context of the application package.
 * @param count Badge count to be set
 */
 public static void setBadgeCount(Context context, int count) {
 if (count <= 0) {
 count = 0;
 } else {
 count = Math.max(0, Math.min(count, 99));
 }
 if (Build.MANUFACTURER.equalsIgnoreCase("Xiaomi")) {
 sendToXiaoMi(context, count);
 } else if (Build.MANUFACTURER.equalsIgnoreCase("sony")) {
 sendToSony(context, count);
 } else if (Build.MANUFACTURER.toLowerCase().contains("samsung")) {
 sendToSamsumg(context, count);
 } else {
 Toast.makeText(context, "Not Support", Toast.LENGTH_LONG).show();
 }
 }
 /**
 * 向小米手机发送未读消息数广播
 * @param count
 */
 private static void sendToXiaoMi(Context context, int count) {
 try {
 Class miuiNotificationClass = Class.forName("android.app.MiuiNotification");
 Object miuiNotification = miuiNotificationClass.newInstance();
 Field field = miuiNotification.getClass().getDeclaredField("messageCount");
 field.setAccessible(true);
 field.set(miuiNotification, String.valueOf(count == 0 ? "" : count)); // 设置信息数-->这种发送必须是miui 6才行
 } catch (Exception e) {
 e.printStackTrace();
 // miui 6之前的版本
 Intent localIntent = new Intent(
 "android.intent.action.APPLICATION_MESSAGE_UPDATE");
 localIntent.putExtra(
 "android.intent.extra.update_application_component_name",
 context.getPackageName() + "/" + getLauncherClassName(context));
 localIntent.putExtra(
 "android.intent.extra.update_application_message_text", String.valueOf(count == 0 ? "" : count));
 context.sendBroadcast(localIntent);
 }
 }
 /**
 * 向索尼手机发送未读消息数广播<br/>
 * 据说:需添加权限:<uses-permission android:name="com.sonyericsson.home.permission.BROADCAST_BADGE" /> [未验证]
 * @param count
 */
 private static void sendToSony(Context context, int count){
 String launcherClassName = getLauncherClassName(context);
 if (launcherClassName == null) {
 return;
 }
 boolean isShow = true;
 if (count == 0) {
 isShow = false;
 }
 Intent localIntent = new Intent();
 localIntent.setAction("com.sonyericsson.home.action.UPDATE_BADGE");
 localIntent.putExtra("com.sonyericsson.home.intent.extra.badge.SHOW_MESSAGE",isShow);//是否显示
 localIntent.putExtra("com.sonyericsson.home.intent.extra.badge.ACTIVITY_NAME",launcherClassName );//启动页
 localIntent.putExtra("com.sonyericsson.home.intent.extra.badge.MESSAGE", String.valueOf(count));//数字
 localIntent.putExtra("com.sonyericsson.home.intent.extra.badge.PACKAGE_NAME", context.getPackageName());//包名
 context.sendBroadcast(localIntent);
 }
 /**
 * 向三星手机发送未读消息数广播
 * @param count
 */
 private static void sendToSamsumg(Context context, int count){
 String launcherClassName = getLauncherClassName(context);
 if (launcherClassName == null) {
 return;
 }
 Intent intent = new Intent("android.intent.action.BADGE_COUNT_UPDATE");
 intent.putExtra("badge_count", count);
 intent.putExtra("badge_count_package_name", context.getPackageName());
 intent.putExtra("badge_count_class_name", launcherClassName);
 context.sendBroadcast(intent);
 }
 /**
 * 重置、清除Badge未读显示数<br/>
 * @param context
 */
 public static void resetBadgeCount(Context context) {
 setBadgeCount(context, 0);
 }
 /**
 * Retrieve launcher activity name of the application from the context
 *
 * @param context The context of the application package.
 * @return launcher activity name of this application. From the
 * "android:name" attribute.
 */
 private static String getLauncherClassName(Context context) {
 PackageManager packageManager = context.getPackageManager();
 Intent intent = new Intent(Intent.ACTION_MAIN);
 // To limit the components this Intent will resolve to, by setting an
 // explicit package name.
 intent.setPackage(context.getPackageName());
 intent.addCategory(Intent.CATEGORY_LAUNCHER);
 // All Application must have 1 Activity at least.
 // Launcher activity must be found!
 ResolveInfo info = packageManager
 .resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
 // get a ResolveInfo containing ACTION_MAIN, CATEGORY_LAUNCHER
 // if there is no Activity which has filtered by CATEGORY_DEFAULT
 if (info == null) {
 info = packageManager.resolveActivity(intent, 0);
 }
 return info.activityInfo.name;
 }
}
在启动的Activity中、发送未读消息数目广播 和 重置/清除未读消息数目广播 的调用如下: 
// 发送未读消息数目广播:count为未读消息数目(int类型)
BadgeUtil.setBadgeCount(getApplicationContext(), count);
// 发送重置/清除未读消息数目广播:
BadgeUtil.resetBadgeCount(getApplicationContext());