Fix: Specify Namespace in rn-fetch-blob for Android Compatibility

[josebrc]

Hi! 👋

Firstly, thanks for your work on this project! 🙂

Today I used patch-package to patch rn-fetch-blob@0.12.0 for the project I'm working on.

Here is the diff that solved my problem:

diff --git a/node_modules/rn-fetch-blob/android/build.gradle b/node_modules/rn-fetch-blob/android/build.gradle
index a4ca7a4..30ac197 100644
--- a/node_modules/rn-fetch-blob/android/build.gradle
+++ b/node_modules/rn-fetch-blob/android/build.gradle
@@ -1,46 +1,26 @@
 apply plugin: 'com.android.library'
 
-def safeExtGet(prop, fallback) {
-    rootProject.ext.has(prop) ? rootProject.ext.get(prop) : fallback
-}
-
-repositories {
-    mavenCentral()
-    jcenter()
-    google()
-}
-
-buildscript {
-    repositories {
-        jcenter()
-        google()
-    }
-    dependencies {
-        classpath 'com.android.tools.build:gradle:3.2.1'
-    }
-}
-
 android {
-    compileSdkVersion safeExtGet('compileSdkVersion', 28)
-    buildToolsVersion safeExtGet('buildToolsVersion', '28.0.3')
+    compileSdkVersion rootProject.ext.compileSdkVersion ?: 30
+    buildToolsVersion rootProject.ext.buildToolsVersion ?: "30.0.2"
+    namespace "com.RNFetchBlob" // add this line
+
     defaultConfig {
-        minSdkVersion safeExtGet('minSdkVersion', 16)
-        targetSdkVersion safeExtGet('targetSdkVersion', 28)
+        minSdkVersion 16
+        targetSdkVersion rootProject.ext.targetSdkVersion ?: 30
         versionCode 1
         versionName "1.0"
     }
+
     buildTypes {
         release {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
-    productFlavors {
-    }
 }
 
 dependencies {
-    implementation "com.facebook.react:react-native:${safeExtGet('reactNativeVersion', '+')}"
-    //compile 'com.squareup.okhttp3:okhttp:+'
-    //{RNFetchBlob_PRE_0.28_DEPDENDENCY}
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'com.facebook.react:react-native:+'
 }

This issue body was partially generated by patch-package.