检测是否是小米手机

最近升级了MIUI系统，新系统中，蓝牙功能不能正常使用，分析原因后发现是由于没有开启定位权限，但是又不能获取定位权限是否开启的正确的值，不管是是否授权了，都返回了授权，所以没法判断，

所以针对小米手机加了一些特殊的处理，刚好用到下面的判断。

作者：Mariotaku
链接：https://www.zhihu.com/question/22102139/answer/24834510
来源：知乎
著作权归作者所有。商业转载请联系作者获得授权，非商业转载请注明出处。

// 检测MIUI
import java.io.IOException;

public final class MIUIUtils {

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";

public static boolean isMIUI() {
try {
final BuildProperties prop = BuildProperties.newInstance();
return prop.getProperty(KEY_MIUI_VERSION_CODE, null) != null
|| prop.getProperty(KEY_MIUI_VERSION_NAME, null) != null
|| prop.getProperty(KEY_MIUI_INTERNAL_STORAGE, null) != null;
} catch (final IOException e) {
return false;
}
}
}

// 检测Flyme
import android.os.Build;

import java.lang.reflect.Method;

public final class FlymeUtils {

public static boolean isFlyme() {
try {
// Invoke Build.hasSmartBar()
final Method method = Build.class.getMethod("hasSmartBar");
return method != null;
} catch (final Exception e) {
return false;
}
}

}

//引用到的工具类
import android.os.Environment;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Collection;
import java.util.Enumeration;
import java.util.Map.Entry;
import java.util.Properties;
import java.util.Set;

public class BuildProperties {

private final Properties properties;

private BuildProperties() throws IOException {
properties = new Properties();
properties.load(new FileInputStream(new File(Environment.getRootDirectory(), "build.prop")));
}

public boolean containsKey(final Object key) {
　　return properties.containsKey(key);
}

public boolean containsValue(final Object value) {
　　return properties.containsValue(value);
}

public Set<Entry<Object, Object>> entrySet() {
return properties.entrySet();
}

public String getProperty(final String name) {
　　return properties.getProperty(name);
}

public String getProperty(final String name, final String defaultValue) {
　　return properties.getProperty(name, defaultValue);
}

public boolean isEmpty() {
　　return properties.isEmpty();
}

public Enumeration<Object> keys() {
　　return properties.keys();
}

public Set<Object> keySet() {
　　return properties.keySet();
}

public int size() {
　　return properties.size();
}

public Collection<Object> values() {
　　return properties.values();
}

public static BuildProperties newInstance() throws IOException {
　　return new BuildProperties();
}

}