获取系统SDK版本、判断手机ROM

Build获取系统SDK版本

Android中部分API的使用，需要在特定的SDK版本之后才能使用，因此在兼容老版本SDK的时候，经常需要判断API的版本。各种Android版本的对应关系参考《Android各版本对应的SDK版本》

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
         //SDK 28及以上
    } else {
         //SDK 28以下
    }

判断手机ROM

有时候需要判断手机系统的ROM，检测ROM是MIUI、EMUI还是Flyme，可以使用getprop命令，去系统build.prop文件(关于build.prop参考《Android build.prop系统属性信息》)查找是否有对应属性来判断是什么ROM。参考简书夏末m小伙伴写《Android判断手机ROM》

public class Rom {

    private static final String TAG = "Rom";

    public static final String ROM_MIUI = "MIUI";
    public static final String ROM_EMUI = "EMUI";
    public static final String ROM_FLYME = "FLYME";
    public static final String ROM_OPPO = "OPPO";
    public static final String ROM_SMARTISAN = "SMARTISAN";
    public static final String ROM_VIVO = "VIVO";
    public static final String ROM_QIKU = "QIKU";

    private static final String KEY_VERSION_MIUI = "ro.miui.ui.version.name";
    private static final String KEY_VERSION_EMUI = "ro.build.version.emui";
    private static final String KEY_VERSION_OPPO = "ro.build.version.opporom";
    private static final String KEY_VERSION_SMARTISAN = "ro.smartisan.version";
    private static final String KEY_VERSION_VIVO = "ro.vivo.os.version";

    private static String sName;
    private static String sVersion;

    public static boolean isEmui() {
        return check(ROM_EMUI);
    }

    public static boolean isMiui() {
        return check(ROM_MIUI);
    }

    public static boolean isVivo() {
        return check(ROM_VIVO);
    }

    public static boolean isOppo() {
        return check(ROM_OPPO);
    }

    public static boolean isFlyme() {
        return check(ROM_FLYME);
    }

    public static boolean is360() {
        return check(ROM_QIKU) || check("360");
    }

    public static boolean isSmartisan() {
        return check(ROM_SMARTISAN);
    }

    public static String getName() {
        if (sName == null) {
            check("");
        }
        return sName;
    }
    
    public static String getVersion() {
        if (sVersion == null) {
            check("");
        }
        return sVersion;
    }

    public static boolean check(String rom) {
        if (sName != null) {
            return sName.equals(rom);
        }

        if (!TextUtils.isEmpty(sVersion = getProp(KEY_VERSION_MIUI))) {
            sName = ROM_MIUI;
        } else if (!TextUtils.isEmpty(sVersion = getProp(KEY_VERSION_EMUI))) {
            sName = ROM_EMUI;
        } else if (!TextUtils.isEmpty(sVersion = getProp(KEY_VERSION_OPPO))) {
            sName = ROM_OPPO;
        } else if (!TextUtils.isEmpty(sVersion = getProp(KEY_VERSION_VIVO))) {
            sName = ROM_VIVO;
        } else if (!TextUtils.isEmpty(sVersion = getProp(KEY_VERSION_SMARTISAN))) {
            sName = ROM_SMARTISAN;
        } else {
            sVersion = Build.DISPLAY;
            if (sVersion.toUpperCase().contains(ROM_FLYME)) {
                sName = ROM_FLYME;
            } else {
                sVersion = Build.UNKNOWN;
                sName = Build.MANUFACTURER.toUpperCase();
            }
        }
        return sName.equals(rom);
    }

    public static String getProp(String name) {
        String line = null;
        BufferedReader input = null;
        try {
            Process p = Runtime.getRuntime().exec("getprop " + name);
            input = new BufferedReader(new InputStreamReader(p.getInputStream()), 1024);
            line = input.readLine();
            input.close();
        } catch (IOException ex) {
            Log.e(TAG, "Unable to read prop " + name, ex);
            return null;
        } finally {
            if (input != null) {
                try {
                    input.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return line;
    }}

getprop查看IQOO手机中的build.prop中的信息，一些字段如下：

...
    [ro.vivo.rom]: [rom_9.0]
    [ro.vivo.rom.style]: [vigour]
    [ro.vivo.rom.version]: [rom_9.0]
    [ro.vivo.software.compat3app]: [1]
    ...

参考资料：

        《Android获取操作系统名称》