Android - Helper for 3rd party roms: Flyme & MIUI.

FlymeUtils.java

package cc.cubone.turbo.core.rom;

import android.os.Build;
import android.view.Window;
import android.view.WindowManager;

import java.lang.reflect.Field;
import java.lang.reflect.Method;

/**
 * @see <a href="http://open-wiki.flyme.cn/index.php?title=Flyme%E7%B3%BB%E7%BB%9FAPI">Flyme系统API</a>
 */
public class FlymeUtils {

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

    public static boolean setStatusBarDarkIcon(Window window, boolean dark) {
        boolean result = false;
        if (window != null) {
            try {
                WindowManager.LayoutParams lp = window.getAttributes();
                Field darkFlag = WindowManager.LayoutParams.class.getDeclaredField("MEIZU_FLAG_DARK_STATUS_BAR_ICON");
                Field meizuFlags = WindowManager.LayoutParams.class.getDeclaredField("meizuFlags");
                darkFlag.setAccessible(true);
                meizuFlags.setAccessible(true);
                int bit = darkFlag.getInt(null);
                int value = meizuFlags.getInt(lp);
                if (dark) {
                    value |= bit;
                } else {
                    value &= ~bit;
                }
                meizuFlags.setInt(lp, value);
                window.setAttributes(lp);
                result = true;
            } catch (Exception ignored) {
            }
        }
        return result;
    }

}

MIUIUtils.java

package cc.cubone.turbo.core.rom;

import android.app.AppOpsManager;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Binder;
import android.os.Build;
import android.provider.Settings;
import android.view.Window;

import java.io.IOException;
import java.lang.reflect.Method;

import cc.cubone.turbo.core.os.BuildProperties;

/**
 * @see <a href="http://dev.xiaomi.com/doc/?p=254">如何识别小米设备/MIUI系统</a>
 * @see <a href="http://dev.xiaomi.com/docs/appsmarket/technical_docs/immersion/">MIUI 6 沉浸式状态栏调用方法</a>
 * @see <a href="http://www.cnblogs.com/fangyucun/p/4027750.html">关于MIUI悬浮窗权限问题的解决方案</a>
 */
public class MIUIUtils {

    public static final String MIUI_V5 = "V5";
    public static final String MIUI_V6 = "V6";

    public enum StatusBarMode {
        TRANSPARENT, TRANSPARENT_DARK_TEXT, DARK_TEXT_CLEAN,
    }

    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 (IOException e) {
            return false;
        }
    }

    public static boolean isMIUIV5() {
        return getVersionName().equals(MIUI_V5);
    }

    public static boolean isMIUIV6() {
        return getVersionName().equals(MIUI_V6);
    }

    public static String getVersionName() {
        try {
            final BuildProperties prop = BuildProperties.newInstance();
            return prop.getProperty(KEY_MIUI_VERSION_NAME);
        } catch (IOException e) {
            return "";
        }
    }

    @SuppressWarnings("IncompatibleBitwiseMaskOperation")
    public static boolean isFloatWindowOpAllowed(Context context) {
        if (Build.VERSION.SDK_INT >= 19) { // 19, 4.4, KITKAT
            final AppOpsManager manager = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
            final int mode = manager.checkOp(AppOpsManager.OPSTR_SYSTEM_ALERT_WINDOW,
                    Binder.getCallingUid(), context.getPackageName());
            return AppOpsManager.MODE_ALLOWED == mode;
        } else {
            return (context.getApplicationInfo().flags & 1 << 27) == 1;
        }
    }

    public static Intent toPermissionManager(Context context, String packageName) {
        Intent intent = new Intent("miui.intent.action.APP_PERM_EDITOR");
        String version = getVersionName();
        if (MIUI_V5.equals(version)) {
            PackageInfo pInfo;
            try {
                pInfo = context.getPackageManager().getPackageInfo(packageName, 0);
            } catch (PackageManager.NameNotFoundException ignored) {
                return null;
            }
            intent.setClassName("com.android.settings", "com.miui.securitycenter.permission.AppPermissionsEditor");
            intent.putExtra("extra_package_uid", pInfo.applicationInfo.uid);
        } else { // MIUI_V6 and above
            final String PKG_SECURITY_CENTER = "com.miui.securitycenter";
            try {
                context.getPackageManager().getPackageInfo(PKG_SECURITY_CENTER, PackageManager.GET_ACTIVITIES);
            } catch (PackageManager.NameNotFoundException ignored) {
                return null;
            }
            intent.setClassName(PKG_SECURITY_CENTER, "com.miui.permcenter.permissions.AppPermissionsEditorActivity");
            intent.putExtra("extra_pkgname", packageName);
        }
        return intent;
    }

    public static Intent toAutoStartPermission() {
        Intent intent = new Intent();
        intent.setAction("miui.intent.action.OP_AUTO_START");
        intent.addCategory(Intent.CATEGORY_DEFAULT);
        return intent;
    }

    /**
     * Note: V5的悬浮窗权限在应用详情里面
     */
    public static Intent toFloatWindowPermission(Context context, String packageName) {
        Uri packageUri = Uri.parse("package:" + packageName);
        Intent detailsIntent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS, packageUri);
        detailsIntent.addCategory(Intent.CATEGORY_DEFAULT);
        if (isMIUIV5()) {
            return detailsIntent;
        } else {
            Intent permIntent = toPermissionManager(context, packageName);
            return permIntent == null ? detailsIntent : permIntent;
        }
    }

    public static Intent toRootPermission() {
        Intent intent = new Intent();
        intent.setAction("miui.intent.action.ROOT_MANAGER");
        intent.addCategory(Intent.CATEGORY_DEFAULT);
        return intent;
    }

    public static void setStatusBar(Window window, StatusBarMode mode) {
        try {
            Class layoutParamsClass = Class.forName("android.view.MiuiWindowManager$LayoutParams");
            int tranceFlag = layoutParamsClass.getField("EXTRA_FLAG_STATUS_BAR_TRANSPARENT").getInt(null);
            int darkModeFlag = layoutParamsClass.getField("EXTRA_FLAG_STATUS_BAR_DARK_MODE").getInt(null);

            Method extraFlagsField = Window.class.getMethod("setExtraFlags", int.class, int.class);
            switch (mode) {
                case TRANSPARENT:
                    extraFlagsField.invoke(window, tranceFlag, tranceFlag); // 只需要状态栏透明
                    break;
                case TRANSPARENT_DARK_TEXT:
                    extraFlagsField.invoke(window, tranceFlag | darkModeFlag, tranceFlag | darkModeFlag); // 状态栏透明且黑色字体
                    break;
                case DARK_TEXT_CLEAN:
                    extraFlagsField.invoke(window, 0, darkModeFlag); // 清除黑色字体
                    break;
            }
        } catch (Exception ignored) {
        }
    }
}

RomCompat.java

package cc.cubone.turbo.core.rom;

import android.annotation.TargetApi;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Build;
import android.provider.Settings;
import android.support.v4.content.ContextCompat;

import static android.Manifest.permission.SYSTEM_ALERT_WINDOW;

/**
 * Helper for accessing custom features for 3rd party roms.
 *
 * @see <a href="https://github.com/weikano/RomHelper">RomHelper</a>
 */
public final class RomCompat {

    interface RomCompatImpl {
        public String getVersionName();
        public boolean isThirdParty();
        public boolean isAutoStart();
        public boolean hasPermissionManager();
        public boolean hasFloatWindowPermission(Context context);
        public Intent toAppDetails(Context context, String packageName);
        public Intent toPermissionManager(Context context, String packageName);
        public Intent toAutoStartPermission(Context context, String packageName);
        public Intent toFloatWindowPermission(Context context, String packageName);
        public Intent toRootPermission(Context context, String packageName);
    }

    static class BaseRomCompatImpl implements RomCompatImpl {
        @Override
        public String getVersionName() {
            return String.valueOf(Build.VERSION.SDK_INT);
        }

        @Override
        public boolean isThirdParty() {
            return false;
        }

        @Override
        public boolean isAutoStart() {
            return true;
        }

        @Override
        public boolean hasPermissionManager() {
            return Build.VERSION.SDK_INT >= 23; // 23, 6.0, MARSHMALLOW
        }

        @Override
        public boolean hasFloatWindowPermission(Context context) {
            return ContextCompat.checkSelfPermission(context, SYSTEM_ALERT_WINDOW)
                    == PackageManager.PERMISSION_GRANTED;
        }

        @Override
        public Intent toAppDetails(Context context, String packageName) {
            Uri packageUri = Uri.parse("package:" + packageName);
            Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS, packageUri);
            intent.addCategory(Intent.CATEGORY_DEFAULT);
            return intent;
        }

        @Override
        public Intent toPermissionManager(Context context, String packageName) {
            return null;
        }

        @Override
        public Intent toAutoStartPermission(Context context, String packageName) {
            return null;
        }

        @Override
        public Intent toFloatWindowPermission(Context context, String packageName) {
            return null;
        }

        @Override
        public Intent toRootPermission(Context context, String packageName) {
            return null;
        }
    }

    @TargetApi(23) // 23, 6.0, MARSHMALLOW
    static class MarshmallowRomCompatImpl extends BaseRomCompatImpl {
        @Override
        public boolean hasFloatWindowPermission(Context context) {
            return Settings.canDrawOverlays(context);
        }

        @Override
        public Intent toFloatWindowPermission(Context context, String packageName) {
            return new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION,
                    Uri.parse("package:" + packageName));
        }
    }

    static class ThirdPartyRomCompatImpl extends BaseRomCompatImpl {
        @Override
        public boolean isThirdParty() {
            return true;
        }

        @Override
        public boolean hasPermissionManager() {
            return true;
        }
    }

    static class FlymeRomCompatImpl extends ThirdPartyRomCompatImpl {
        @Override
        public Intent toPermissionManager(Context context, String packageName) {
            return toAppDetails(context, packageName);
        }

        @Override
        public Intent toAutoStartPermission(Context context, String packageName) {
            return toAppDetails(context, packageName);
        }

        @Override
        public Intent toFloatWindowPermission(Context context, String packageName) {
            return toAppDetails(context, packageName);
        }

        @Override
        public Intent toRootPermission(Context context, String packageName) {
            return null;
        }
    }

    static class MIUIRomCompatImpl extends ThirdPartyRomCompatImpl {
        @Override
        public String getVersionName() {
            return MIUIUtils.getVersionName();
        }

        @Override
        public Intent toPermissionManager(Context context, String packageName) {
            return MIUIUtils.toPermissionManager(context, packageName);
        }

        @Override
        public Intent toAutoStartPermission(Context context, String packageName) {
            return MIUIUtils.toAutoStartPermission();
        }

        @Override
        public Intent toFloatWindowPermission(Context context, String packageName) {
            return MIUIUtils.toFloatWindowPermission(context, packageName);
        }

        @Override
        public Intent toRootPermission(Context context, String packageName) {
            return MIUIUtils.toRootPermission();
        }
    }

    static final RomCompatImpl IMPL;
    static {
        final int version = android.os.Build.VERSION.SDK_INT;
        if (version >= 23) { // 23, 6.0, MARSHMALLOW
            IMPL = new MarshmallowRomCompatImpl();
        } else if (FlymeUtils.isFlyme()) {
            IMPL = new FlymeRomCompatImpl();
        } else if (MIUIUtils.isMIUI()) {
            IMPL = new MIUIRomCompatImpl();
        } else {
            IMPL = new BaseRomCompatImpl();
        }
    }

    public static String getVersionName() {
        return IMPL.getVersionName();
    }

    public static boolean isThirdParty() {
        return IMPL.isThirdParty();
    }

    public static boolean isAutoStart() {
        return IMPL.isAutoStart();
    }

    public static boolean hasPermissionManager() {
        return IMPL.hasPermissionManager();
    }

    public static boolean hasFloatWindowPermission(Context context) {
        return IMPL.hasFloatWindowPermission(context);
    }

    public static Intent toAppDetails(Context context) {
        return toAppDetails(context, context.getPackageName());
    }

    public static Intent toAppDetails(Context context, String packageName) {
        return IMPL.toAppDetails(context, packageName);
    }

    public static Intent toPermissionManager(Context context) {
        return toPermissionManager(context, context.getPackageName());
    }

    public static Intent toPermissionManager(Context context, String packageName) {
        return IMPL.toPermissionManager(context, packageName);
    }

    public static Intent toAutoStartPermission(Context context) {
        return toAutoStartPermission(context, context.getPackageName());
    }

    public static Intent toAutoStartPermission(Context context, String packageName) {
        return IMPL.toAutoStartPermission(context, packageName);
    }

    public static Intent toFloatWindowPermission(Context context) {
        return toFloatWindowPermission(context, context.getPackageName());
    }

    public static Intent toFloatWindowPermission(Context context, String packageName) {
        return IMPL.toFloatWindowPermission(context, packageName);
    }

    public static Intent toRootPermission(Context context) {
        return toRootPermission(context, context.getPackageName());
    }

    public static Intent toRootPermission(Context context, String packageName) {
        return IMPL.toRootPermission(context, packageName);
    }
}

Related: BuildProperties.java