Release React Native for Android

This is an early release and there are several things that are known
not to work if you're porting your iOS app to Android.

See the Known Issues guide on the website.

We will work with the community to reach platform parity with iOS.

local-cli/generator-android/index.js

@@ -0,0 +1,64 @@
+'use strict';
+
+var chalk = require('chalk');
+var fs = require('fs');
+var path = require('path');
+var yeoman = require('yeoman-generator');
+
+function validatePackageName(name) {
+  if (!name.match(/^([a-zA-Z_$][a-zA-Z\d_$]*\.)+([a-zA-Z_$][a-zA-Z\d_$]*)$/)) {
+    return false;
+  }
+  return true;
+}
+
+module.exports = yeoman.generators.NamedBase.extend({
+  constructor: function() {
+    yeoman.generators.NamedBase.apply(this, arguments);
+
+    this.option('package', {
+      desc: 'Package name for the application (com.example.app)',
+      type: String,
+      defaults: 'com.' + this.name.toLowerCase()
+    });
+  },
+
+  initializing: function() {
+    if (!validatePackageName(this.options.package)) {
+      throw new Error('Package name ' + this.options.package + ' is invalid');
+    }
+  },
+
+  writing: function() {
+    var templateParams = {
+      package: this.options.package,
+      name: this.name
+    };
+    this.fs.copyTpl(
+      this.templatePath(path.join('src', '**')),
+      this.destinationPath('android'),
+      templateParams
+    );
+    this.fs.copy(
+      this.templatePath(path.join('bin', '**')),
+      this.destinationPath('android')
+    );
+    var javaPath = path.join.apply(
+      null,
+      ['android', 'app', 'src', 'main', 'java'].concat(this.options.package.split('.'))
+    );
+    this.fs.copyTpl(
+      this.templatePath(path.join('package', '**')),
+      this.destinationPath(javaPath),
+      templateParams
+    );
+  },
+
+  end: function() {
+    var projectPath = this.destinationRoot();
+    this.log(chalk.white.bold('To run your app on Android:'));
+    this.log(chalk.white('   Have an Android emulator running, or a device connected'));
+    this.log(chalk.white('   cd ' + projectPath));
+    this.log(chalk.white('   react-native run-android'));
+  }
+});