随便修改下

.gitignore

@@ -65,3 +65,5 @@ buck-out/
 
 *.idea
 yarn*
+
+**gradle*

android/README.md

@@ -0,0 +1,14 @@
+README
+======
+
+If you want to publish the lib as a maven dependency, follow these steps before publishing a new version to npm:
+
+1. Be sure to have the Android [SDK](https://developer.android.com/studio/index.html) and [NDK](https://developer.android.com/ndk/guides/index.html) installed
+2. Be sure to have a `local.properties` file in this folder that points to the Android SDK and NDK
+```
+ndk.dir=/Users/{username}/Library/Android/sdk/ndk-bundle
+sdk.dir=/Users/{username}/Library/Android/sdk
+```
+3. Delete the `maven` folder
+4. Run `./gradlew installArchives`
+5. Verify that latest set of generated files is in the maven folder with the correct version number

android/app/src/main/AndroidManifest.xml

@@ -1,5 +1,4 @@
 <manifest
     package="top.jerryyan.RN.A.FitFullScreen"
     xmlns:android="http://schemas.android.com/apk/res/android">
-    <application/>
+</manifest>
-</manifest>

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

@@ -1,4 +1,26 @@
 package top.jerryyan.RN.A.FitFullScreen;
 
+import com.facebook.react.bridge.ReactApplicationContext;
+import com.facebook.react.bridge.ReactContextBaseJavaModule;
+import com.facebook.react.bridge.ReactMethod;
+import com.facebook.react.bridge.Callback;
+
 public class FitModule extends ReactContextBaseJavaModule {
+    private final ReactApplicationContext reactContext;
+
+    public FitModule(ReactApplicationContext reactContext) {
+        super(reactContext);
+        this.reactContext = reactContext;
+    }
+
+    @Override
+    public String getName() {
+        return "Fit";
+    }
+
+    @ReactMethod
+    public void sampleMethod(String stringArgument, int numberArgument, Callback callback) {
+        // TODO: Implement some actually useful functionality
+        callback.invoke("Received numberArgument: " + numberArgument + " stringArgument: " + stringArgument);
+    }
 }

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

@@ -0,0 +1,22 @@
+package top.jerryyan.RN.A.FitFullScreen;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+import com.facebook.react.ReactPackage;
+import com.facebook.react.bridge.NativeModule;
+import com.facebook.react.bridge.ReactApplicationContext;
+import com.facebook.react.uimanager.ViewManager;
+import com.facebook.react.bridge.JavaScriptModule;
+
+public class FitPackage implements ReactPackage {
+    @Override
+    public List<NativeModule> createNativeModules(ReactApplicationContext reactContext) {
+        return Arrays.<NativeModule>asList(new FitModule(reactContext));
+    }
+
+    @Override
+    public List<ViewManager> createViewManagers(ReactApplicationContext reactContext) {
+        return Collections.emptyList();
+    }
+}

android/build.gradle

@@ -1,28 +1,49 @@
-apply plugin: 'com.android.library'
-
 def safeExtGet(prop, fallback) {
     rootProject.ext.has(prop) ? rootProject.ext.get(prop) : fallback
 }
 
-android {
+apply plugin: 'com.android.library'
-    compileSdkVersion safeExtGet("compileSdkVersion", 28)
+apply plugin: 'maven'
 
+buildscript {
+    // The Android Gradle plugin is only required when opening the android folder stand-alone.
+    // This avoids unnecessary downloads and potential conflicts when the library is included as a
+    // module dependency in an application project.
+    // ref: https://docs.gradle.org/current/userguide/tutorial_using_tasks.html#sec:build_script_external_dependencies
+    repositories {
+        google()
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:3.5.3'
+    }
+}
+
+android {
+    compileSdkVersion safeExtGet('compileSdkVersion', 28)
+    buildToolsVersion safeExtGet('buildToolsVersion', '28.0.3')
     defaultConfig {
-        minSdkVersion safeExtGet('minSdkVersion', 16)
+        minSdkVersion safeExtGet('minSdkVersion', 19)
         targetSdkVersion safeExtGet('targetSdkVersion', 28)
-        versionCode 1
+    }
-        versionName "1.0"
+    lintOptions {
-        ndk {
+        abortOnError false
-            abiFilters "armeabi-v7a", "x86"
-        }
     }
 }
 
 repositories {
+    // ref: https://www.baeldung.com/maven-local-repository
+    mavenLocal()
     maven {
         // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
         url "$rootDir/../node_modules/react-native/android"
     }
+    maven {
+        // Android JSC is installed from npm
+        url "$rootDir/../node_modules/jsc-android/dist"
+    }
+    google()
+    jcenter()
 }
 
 dependencies {

package.json

@@ -20,5 +20,13 @@
   "bugs": {
     "url": "http://git.jerryyan.top/q792602257/jerry-rn-a-fitfullscreen"
   },
-  "homepage": "http://git.jerryyan.top/q792602257/jerry-rn-a-fitfullscreen"
+  "homepage": "http://git.jerryyan.top/q792602257/jerry-rn-a-fitfullscreen",
+  "peerDependencies": {
+    "react": "^16.8.1",
+    "react-native": ">=0.60.0-rc.0 <1.0.x"
+  },
+  "devDependencies": {
+    "react": "^16.9.0",
+    "react-native": "^0.61.5"
+  }
 }