Android应用图标上的小红点Badge实现

客官°小女子只卖身不卖艺 2022-07-13 06:28 279阅读 0赞

## Android应用图标上的小红点Badge实现 ##

为了增加APP的日活，在Android中有许多的应用仿苹果的在应用图标上显示小红点。当然有着一些手机ROM对小红点的支持，比如小米，三星等。

我们下面看下如何实现：

MainActivity:

public class MainActivity extends AppCompatActivity { 
    
    
        private Handler handler = new Handler();
    
        private Runnable runnable = new MyRunnable();
    
        public class MyRunnable implements Runnable { 
    
            @Override
            public void run() {
                handler.postDelayed(runnable, 5000);
                BadgeUtil.setBadgeCount(getApplicationContext(), getCount(), R.mipmap.ic_launcher);
            }
        }
    
        private int getCount() {
    
            return new Random().nextInt(100);
        }
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
            Button start = (Button) findViewById(R.id.start);
            Button stop = (Button) findViewById(R.id.stop);
    
            start.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (handler == null) {
                        handler = new Handler();
                    }
    
                    if (runnable == null) {
                        runnable = new MyRunnable();
                    }
    
                    handler.post(runnable);
                }
            });
    
            stop.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (handler != null) {
                        BadgeUtil.resetBadgeCount(getApplicationContext(), R.mipmap.ic_launcher);
                        handler.removeCallbacksAndMessages(null);
                        runnable = null;
                        handler = null;
                    }
                }
            });
        }
    }

--------------------

BadgeUtil：目前支持小米，三星，LG，索尼,HTC等手机

public final class BadgeUtil { 
    
        private BadgeUtil() throws InstantiationException {
            throw new InstantiationException("This class is not for instantiation");
        }
    
        /** * 设置Badge 目前支持Launcher */
        public static void setBadgeCount(Context context, int count, int iconResId) {
            if (count <= 0) {
                count = 0;
            } else {
                count = Math.max(0, Math.min(count, 99));
            }
    
            if (Build.MANUFACTURER.equalsIgnoreCase("xiaomi")) {
                setBadgeOfMIUI(context, count, iconResId);
            } else if (Build.MANUFACTURER.equalsIgnoreCase("sony")) {
                setBadgeOfSony(context, count);
            } else if (Build.MANUFACTURER.toLowerCase().contains("samsung") ||
                    Build.MANUFACTURER.toLowerCase().contains("lg")) {
                setBadgeOfSumsung(context, count);
            } else if (Build.MANUFACTURER.toLowerCase().contains("htc")) {
                setBadgeOfHTC(context, count);
            } else if (Build.MANUFACTURER.toLowerCase().contains("nova")) {
                setBadgeOfNova(context, count);
            } else {
                Toast.makeText(context, "Not Found Support Launcher", Toast.LENGTH_LONG).show();
            }
        }
    
        /** * 设置MIUI的Badge */
        private static void setBadgeOfMIUI(Context context, int count, int iconResId) {
            NotificationManager mNotificationManager = (NotificationManager) context
                    .getSystemService(Context.NOTIFICATION_SERVICE);
            NotificationCompat.Builder builder = new NotificationCompat.Builder(context);
            builder.setContentTitle("标题").setContentText("消息正文").setSmallIcon(iconResId);
            Notification notification = builder.build();
            try {
                Field field = notification.getClass().getDeclaredField("extraNotification");
                Object extraNotification = field.get(notification);
                Method method = extraNotification.getClass().getDeclaredMethod("setMessageCount", int.class);
                method.invoke(extraNotification, count);
            } catch (Exception e) {
                e.printStackTrace();
            }
            mNotificationManager.notify(0, notification);
        }
    
        /** * 设置索尼的Badge * 需添加权限：<uses-permission android:name="com.sonyericsson.home.permission.BROADCAST_BADGE" /> */
        private static void setBadgeOfSony(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);
        }
    
        /** * 设置三星的Badge\设置LG的Badge */
        private static void setBadgeOfSumsung(Context context, int count) {
            // 获取你当前的应用
            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);
        }
    
        /** * 设置HTC的Badge */
        private static void setBadgeOfHTC(Context context, int count) {
            Intent intentNotification = new Intent("com.htc.launcher.action.SET_NOTIFICATION");
            ComponentName localComponentName = new ComponentName(context.getPackageName(), getLauncherClassName(context));
            intentNotification.putExtra("com.htc.launcher.extra.COMPONENT", localComponentName.flattenToShortString());
            intentNotification.putExtra("com.htc.launcher.extra.COUNT", count);
            context.sendBroadcast(intentNotification);
    
            Intent intentShortcut = new Intent("com.htc.launcher.action.UPDATE_SHORTCUT");
            intentShortcut.putExtra("packagename", context.getPackageName());
            intentShortcut.putExtra("count", count);
            context.sendBroadcast(intentShortcut);
        }
    
        /** * 设置Nova的Badge */
        private static void setBadgeOfNova(Context context, int count) {
            ContentValues contentValues = new ContentValues();
            contentValues.put("tag", context.getPackageName() + "/" + getLauncherClassName(context));
            contentValues.put("count", count);
            context.getContentResolver().insert(Uri.parse("content://com.teslacoilsw.notifier/unread_count"),
                    contentValues);
        }
    
        public static void setBadgeOfMadMode(Context context, int count, String packageName, String className) {
            Intent intent = new Intent("android.intent.action.BADGE_COUNT_UPDATE");
            intent.putExtra("badge_count", count);
            intent.putExtra("badge_count_package_name", packageName);
            intent.putExtra("badge_count_class_name", className);
            context.sendBroadcast(intent);
        }
    
        /** * 重置Badge */
        public static void resetBadgeCount(Context context, int iconResId) {
            setBadgeCount(context, 0, iconResId);
        }
    
        public static String getLauncherClassName(Context context) {
            PackageManager packageManager = context.getPackageManager();
            Intent intent = new Intent(Intent.ACTION_MAIN);
            intent.setPackage(context.getPackageName());
            intent.addCategory(Intent.CATEGORY_LAUNCHER);
            ResolveInfo info = packageManager.resolveActivity(intent, PackageManager.MATCH_DEFAULT_ONLY);
            if (info == null) {
                info = packageManager.resolveActivity(intent, 0);
            }
            return info.activityInfo.name;
        }
    }

![这里写图片描述][SouthEast]

--------------------

参考文章：[Badge分析&如何逼死处女座][Badge]

[SouthEast]: /images/20220713/4d09fe1387ed47b5a2620f47d0f00f85.png
[Badge]: http://www.jianshu.com/p/0992ff9eeeb6