React-native升级记录(2): aapt error: resource android:attr/fontVariationSettings not found

        某个Android版本某一天突然build失败了，很突然，相当突然，又没过改代码（这回是真的！！！）。

        有了之前查问题的经验，先去查issue list， 果然：https://github.com/facebook/react-native/issues/25293，里面提到了解决办法，迁移到AndroidX，但是咱还没准备好。继续，终于有一个without：根本原因是gms的某个升级导致的，所以咱可以把这个升级踢出代码。简书上有个同事的分析：https://www.jianshu.com/p/3730043c1fb8

OK，react-native run android 没问题了。可是，可是，可是高兴的太早了release版本还是出现报错了。

尝试了一下升级"react-native-device-info": "^2.1.2",
npm install [email protected]

这个时候编译出现了找不到符号。因为引入了28的东东，咋办：

暴力修改：node_modules/react-native-device-info/android/src/main/java/com/learnium/RNDeviceInfo/RNDeviceModule.java

390   @ReactMethod
391   public void isLocationEnabled(Promise p) {
392       boolean locationEnabled = false;
393
394       /*if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
395         LocationManager mLocationManager = (LocationManager) reactContext.getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
396         locationEnabled = mLocationManager.isLocationEnabled();
397       } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {*/
398       if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
399         int locationMode = Settings.Secure.getInt(reactContext.getContentResolver(), Settings.Secure.LOCATION_MODE, Settings.Secure.LOCATION_MODE_OFF);
400         locationEnabled = locationMode != Settings.Secure.LOCATION_MODE_OFF;
401       } else {
402         String locationProviders = Settings.Secure.getString(reactContext.getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
403         locationEnabled = !TextUtils.isEmpty(locationProviders);
404       }
405
406       p.resolve(locationEnabled);
407   }

 

在android/build.gradle添加：

subprojects {
        afterEvaluate {
            project ->
                if (project.hasProperty("android")) {
                    android {
                        compileSdkVersion = 27
                        buildToolsVersion = "27.0.3"
                    }
                }
        }
    }

PASS！！！