这种权限比较好的做法应该是做一个引导界面引导用户手动开启吧

如果应用自己可以更改自己的权限，那请问这个权限管理还有什么用？

我是通过将手机root之后进入权限管理xml表修改相应权限

package top.fengshiquan.online.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Properties;

import android.content.ActivityNotFoundException;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.provider.Settings;

public class MIUIUtils
{

// 检测MIUI
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";
/**
 * 检查手机是否是miui
 * 
 * @ref http://dev.xiaomi.com/doc/p=254/index.html
 * @return
 */
public static boolean isMIUI()
{
    String device = Build.MANUFACTURER;
    System.out.println("Build.MANUFACTURER = " + device);
    if (device.equals("Xiaomi"))
    {
        System.out.println("this is a xiaomi device");
        Properties prop = new Properties();
        try
        {
            prop.load(new FileInputStream(new File(Environment
                    .getRootDirectory(), "build.prop")));
        } catch (IOException e)
        {
            e.printStackTrace();
            return false;
        }

        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;
    } else
    {
        return false;
    }
}

/**
 * 跳转到应用权限设置页面 http://www.tuicool.com/articles/jUby6rA
 * 
 * @param context
 *            传入app 或者 activity
 *            context，通过context获取应用packegename，之后通过packegename跳转制定应用
 * @return 是否是miui
 */
public static boolean gotoPermissionSettings(Context context)
{
    boolean mark = isMIUI();

    if (mark)
    {

        // 只兼容miui v5/v6 的应用权限设置页面，否则的话跳转应用设置页面（权限设置上一级页面）
        try
        {
            Intent localIntent = new Intent(
                    "miui.intent.action.APP_PERM_EDITOR");
            localIntent
                    .setClassName("com.miui.securitycenter",
                            "com.miui.permcenter.permissions.AppPermissionsEditorActivity");
            localIntent.putExtra("extra_pkgname", context.getPackageName());
            context.startActivity(localIntent);
            
        } catch (ActivityNotFoundException e)
        {
            Intent intent = new Intent(
                    Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
            Uri uri = Uri.fromParts("package", context.getPackageName(),
                    null);
            intent.setData(uri);
            context.startActivity(intent);
        }
    }

    return mark;
}

}