Android 跳转应用权限设置页面适配小米系统

跳转应用设置页面方便用户修改已拒绝的权限，是经常遇到的需求，但是MIUI 8 系统上测试发现有坑，写一篇文章记录一下。

通常的跳转应用设置页面方法

Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
Uri uri = Uri.fromParts("package", activity.getPackageName(), null);
intent.setData(uri);
activity.startActivityForResult(intent, CODE_REQUEST);

就是通过系统封装的隐式意图直接打开设置页面的详情而已，intent 中提供了包名告诉系统需要调取哪个应用的信息。别忘了通过 startActivityForResult 方式打开，毕竟从设置页面返回之后你还要重走一遍权限检查和后续方法是吧。

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);if (requestCode == CODE_REQUEST) {//TODO something;}
}

Settings 这个类中封装了很多有用的系统属性，看一下 Settings.ACTION_APPLICATION_DETAILS_SETTINGS 这一条的注释:

/*** Activity Action: Show screen of details about a particular application.* <p>* In some cases, a matching Activity may not exist, so ensure you* safeguard against this.* <p>* Input: The Intent's data URI specifies the application package name* to be shown, with the "package" scheme.  That is "package:com.my.app".* <p>* Output: Nothing.*/@SdkConstant(SdkConstantType.ACTIVITY_INTENT_ACTION)public static final String ACTION_APPLICATION_DETAILS_SETTINGS ="android.settings.APPLICATION_DETAILS_SETTINGS";

MIUI 8 系统上遇到的问题

场景是这样的，我需要请求的是打开照相机权限，模拟检测到用户禁用该权限后提示去系统设置页面打开权限的情况。

在系统权限设置页授予权限后回调可以检测到权限已获取，但是小米 MIX 的测试机打开照相机后是黑屏，并提示我权限被禁用，需要在安全中心开启。

原来小米系统在安全中心另外做了一套权限管理页面，并且直接无视了 Android 本身的权限设置页面的操作结果。明目张胆的架空啊。但是用户是不管的，所以我们在 MIUI 系统上就只能提示用户去安全中心的权限管理页面进行修改了。

MIUI 上一些特殊适配的问题可以看这篇帖子: http://www.miui.com/thread-2442999-1-1.html

上代码：

public static void settingPermissionActivity(Activity activity) {//判断是否为小米系统if (TextUtils.equals(BrandUtils.getSystemInfo().getOs(), BrandUtils.SYS_MIUI)) {Intent miuiIntent = new Intent("miui.intent.action.APP_PERM_EDITOR");miuiIntent.putExtra("extra_pkgname", activity.getPackageName());//检测是否有能接受该Intent的Activity存在List<ResolveInfo> resolveInfos = activity.getPackageManager().queryIntentActivities(miuiIntent, PackageManager.MATCH_DEFAULT_ONLY);if (resolveInfos.size() > 0) {activity.startActivityForResult(miuiIntent, CODE_REQUEST_CAMERA_PERMISSIONS);return;}}//如果不是小米系统 则打开Android系统的应用设置页Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);Uri uri = Uri.fromParts("package", activity.getPackageName(), null);intent.setData(uri);activity.startActivityForResult(intent, CODE_REQUEST_CAMERA_PERMISSIONS);
}

判断系统的代码如下:


/*** Created by Yomii on 2017/4/12.*/public class BrandUtils {public static final String SYS_EMUI = "sys_emui";public static final String SYS_MIUI = "sys_miui";public static final String SYS_FLYME = "sys_flyme";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";private static SystemInfo systemInfoInstance;public static SystemInfo getSystemInfo() {if (systemInfoInstance == null) {synchronized (BrandUtils.class) {if (systemInfoInstance == null) {systemInfoInstance = new SystemInfo();getSystem(systemInfoInstance);}}}return systemInfoInstance;}private static void getSystem(SystemInfo info) {try {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) {info.os = SYS_MIUI;//小米info.versionCode = Integer.valueOf(prop.getProperty(KEY_MIUI_VERSION_CODE, "0"));info.versionName = prop.getProperty(KEY_MIUI_VERSION_NAME, "V0");} 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) {info.os = SYS_EMUI;//华为info.versionCode = Integer.valueOf(prop.getProperty(KEY_EMUI_API_LEVEL, "0"));info.versionName = prop.getProperty(KEY_EMUI_VERSION, "unknown");} else if (getMeizuFlymeOSFlag().toLowerCase().contains("flyme")) {info.os = SYS_FLYME;//魅族info.versionCode = 0;info.versionName = "unknown";}} catch (IOException e) {e.printStackTrace();}}private 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;}public static class SystemInfo {private String os = "android";private String versionName = Build.VERSION.RELEASE;private int versionCode = Build.VERSION.SDK_INT;public String getOs() {return os;}public String getVersionName() {return versionName;}public int getVersionCode() {return versionCode;}@Overridepublic String toString() {return "SystemInfo{" +"os='" + os + '\'' +", versionName='" + versionName + '\'' +", versionCode=" + versionCode +'}';}}
}