判断是否小米、华为、魅族系统

public class SystemUtil {
public static final String SYS_EMUI = "sys_emui";
public static final String SYS_MIUI = "sys_miui";
public static final String SYS_FLYME = "sys_flyme";
public static final String SYS_OTHER = "sys_other";
private static final String KEY_MIUI_VERSION_CODE = "ro.miui.ui.version.code";
private static final String KEY_MIUI_VERSION_NAME = "ro.miui.ui.version.name";
private static final String KEY_MIUI_INTERNAL_STORAGE = "ro.miui.internal.storage";
private static final String KEY_EMUI_API_LEVEL = "ro.build.hw_emui_api_level";
private static final String KEY_EMUI_VERSION = "ro.build.version.emui";
private static final String KEY_EMUI_CONFIG_HW_SYS_VERSION = "ro.confg.hw_systemversion";

public static String getSystem(){
String sysType = SharedPreferencesUtil.getString(SysApplication.context,"sysType","");
if (TextUtils.isEmpty(sysType)) {
try {
sysType = SYS_OTHER;
Properties prop = new Properties();
prop.load(new FileInputStream(new File(Environment.getRootDirectory(), "build.prop")));
if (prop.getProperty(KEY_MIUI_VERSION_CODE, null) != null
|| prop.getProperty(KEY_MIUI_VERSION_NAME, null) != null
|| prop.getProperty(KEY_MIUI_INTERNAL_STORAGE, null) != null) {
sysType = SYS_MIUI;//小米
} else if (prop.getProperty(KEY_EMUI_API_LEVEL, null) != null
|| prop.getProperty(KEY_EMUI_VERSION, null) != null
|| prop.getProperty(KEY_EMUI_CONFIG_HW_SYS_VERSION, null) != null) {
sysType = SYS_EMUI;//华为
} else if (getMeizuFlymeOSFlag().toLowerCase().contains("flyme")) {
sysType = SYS_FLYME;//魅族
}
SharedPreferencesUtil.putString(SysApplication.context,"sysType",sysType);
} catch (IOException e) {
e.printStackTrace();
return sysType;
}
}
return sysType;
}

public static String getMeizuFlymeOSFlag() {
return getSystemProperty("ro.build.display.id", "");
}

private static String getSystemProperty(String key, String defaultValue) {
try {
Class<?> clz = Class.forName("android.os.SystemProperties");
Method get = clz.getMethod("get", String.class, String.class);
return (String)get.invoke(clz, key, defaultValue);
} catch (Exception e) {
}
return defaultValue;
}
}