android应用icon右上角未读消息数字提示

1.此功能是指应用图标展示的数字，例如未读短信，邮件，类似iOS应用icon

原生Android系统并不支持此功能

定制的Samsung，sony支持此功能，有各自对应不同的实现方式，以三星为例

1.在AndroidManifest.xml中加上两个权限：

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

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

2.查看你的APP是否已经注册在BadgeProvider中：

Uri uri = Uri.parse("content://com.sec.badge/apps");

Cursor c = getContentResolver().query(uri, null, null, null, null);
if (c == null) {
    return;
}

try {
    if (!c.moveToFirst()) {
        return;
    }

    c.moveToPosition(-1);
    while (c.moveToNext()) {
        String pkg = c.getString(1);
        String clazz = c.getString(2);
        int badgeCount = c.getInt(3);
        Log.d("BadgeTest", "package: " + pkg + ", class: " + clazz + ", count: " + String.valueOf(cnt));
    }
} finally {
    c.close();
}

3.如果没有注册就注册上去：
ContentValues cv = new ContentValues();
cv.put("package", getPackageName());
// Name of your activity declared in the manifest as android.intent.action.MAIN.
// Must be fully qualified name as shown below
cv.put("class", "com.example.badge.activity.Test");
cv.put("badgecount", 1); // integer count you want to display

// Execute insert
getContentResolver().insert(Uri.parse("content://com.sec.badge/apps"), cv);

4.如果已经注册了就用下面方法更新角标：

ContentValues cv = new ContentValues();
cv.put("badgecount", 0);
getContentResolver().update(Uri.parse("content://com.sec.badge/apps"), cv, "package=?", new String[] {getPackageName()});

附：BadgeProvider　https://github.com/shafty023/SamsungBadger

参考http://blog.csdn.net/qq549631030/article/details/38512207

2.对于应用view级别的数字提醒展示可以使用开源控件

https://github.com/jgilfelt/android-viewbadger