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android/app/src/main/java/top/jerryyan/RN/A/FitFullScreen/FitModule.java

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+package top.jerryyan.RN.A.FitFullScreen;
+
+public class FitModule {
+}

android/build.gradle

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+apply plugin: 'com.android.library'
+
+def safeExtGet(prop, fallback) {
+    rootProject.ext.has(prop) ? rootProject.ext.get(prop) : fallback
+}
+
+android {
+    compileSdkVersion safeExtGet("compileSdkVersion", 28)
+
+    defaultConfig {
+        minSdkVersion safeExtGet('minSdkVersion', 16)
+        targetSdkVersion safeExtGet('targetSdkVersion', 28)
+        versionCode 1
+        versionName "1.0"
+        ndk {
+            abiFilters "armeabi-v7a", "x86"
+        }
+    }
+}
+
+repositories {
+    maven {
+        // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
+        url "$rootDir/../node_modules/react-native/android"
+    }
+}
+
+dependencies {
+    implementation 'com.facebook.react:react-native:+'
+}
+