[build] added gulp builder

tasks/android.js

@@ -0,0 +1,72 @@
+"use strict";
+const exec = require('./exec');
+const fs = require('fs');
+const through = require('through2');
+
+
+const Android = {
+    adb: (args) => {
+        const adbBin = `${process.env.ANDROID_HOME}/platform-tools/adb.exe`;
+        return exec('.', [adbBin].concat(args).join(' ')).then((data) => {
+            for (let line of data.stderr.split('\n')) {
+                if (line.indexOf('Error') > -1) {
+                    throw line;
+                }
+            }
+        });
+    },
+
+    aapt: (args) => {
+        let buildToolsVersion = null;
+        fs.readdirSync(`${process.env.ANDROID_HOME}/build-tools`).forEach(file => {
+            buildToolsVersion = file;
+        });
+        const aaptBin = `${process.env.ANDROID_HOME}/build-tools/${buildToolsVersion}/aapt.exe`;
+        return exec('.', [aaptBin].concat(args).join(' '));
+    },
+
+    apk: () => {
+        return through.obj(function(file, enc, callback) {
+            Android.aapt(['l', '-a', file.path]).then((data) => {
+                let activity = false;
+                for (let line of data.stdout.split('\n')) {
+                    if (line.indexOf('package') > -1) {
+                        const value = /"(.*?)"/.exec(line);
+                        if (value) file.package = value[1]
+                    }
+                    if (line.indexOf('activity') > -1) {
+                        activity = true;
+                    }
+                    if (activity && line.indexOf('name') > -1) {
+                        const value = /"(.*?)"/.exec(line);
+                        if (value) {
+                            file.activity = value[1];
+                            activity = false;
+                        }
+                    }
+                }
+                this.push(file);
+                callback();
+            });
+        });
+    },
+
+    install: () => {
+        return through.obj(function(file, enc, callback) {
+            Android.adb(['install', '-r', file.path]).then(() => {
+                this.push(file);
+                callback();
+            });
+        });
+    },
+
+    start: () => {
+        return through.obj((file, enc, callback) => {
+            const name = `${file.package}/${file.activity}`;
+            Android.adb(['shell', 'am', 'start', '-n', name]).then(() => callback());
+        });
+    }
+};
+
+
+module.exports = Android;