public static final int DISABLE_EXPAND = 0x00010000;//4.2以上的整形标识
public static final int DISABLE_EXPAND_LOW = 0x00000001;//4.2以下的整形标识
public static final int DISABLE_NONE = 0x00000000;//取消StatusBar所有disable属性，即还原到最最原始状态

private void unBanStatusBar() {//利用反射解除状态栏禁止下拉
    Object service = getSystemService("statusbar");
    try {
        Class<?> statusBarManager = Class.forName("android.app.StatusBarManager");
        Method expand = statusBarManager.getMethod("disable", int.class);
        expand.invoke(service, DISABLE_NONE);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

private void setStatusBarDisable(int disable_status) {//调用statusBar的disable方法
    Object service = getSystemService("statusbar");
    try {
        Class<?> statusBarManager = Class.forName("android.app.StatusBarManager");
        Method expand = statusBarManager.getMethod("disable", int.class);
        expand.invoke(service, disable_status);
    } catch (Exception e) {
        unBanStatusBar();
        e.printStackTrace();
    }
}

private void disStatusBar() {//禁止statusbar下拉，适配了高低版本
    int currentApiVersion = android.os.Build.VERSION.SDK_INT;
    if (currentApiVersion <= 16) {
        setStatusBarDisable(DISABLE_EXPAND_LOW);
    } else {
        setStatusBarDisable(DISABLE_EXPAND);
    }
}



记得一定要加权限


<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:sharedUserId="android.uid.system"
    package="com.rehome.destop">


manifest加入这行
android:sharedUserId="android.uid.system"


加入权限
<uses-permission android:name="android.permission.EXPAND_STATUS_BAR"/>
    <uses-permission android:name="android.permission.STATUS_BAR"/>