1.关于assets目录，可以选择把source.set这段注释掉，或者在修改如下代码

variant.mergeAssets.doLast {
        def sourceDir = "${buildDir}/../../../../.."

        copy {
            from "${sourceDir}/vivo_assets/vivounionsdk"
            into "${buildDir}/intermediates/merged_assets/${variant.dirName}/out/vivounionsdk"
        }

        copy {
            from "${sourceDir}/vivo_assets/supplierconfig.json"
            into "${buildDir}/intermediates/merged_assets/${variant.dirName}/out/"
        }
        //这里是gradle3.4以上的版本需要改成这样，否则js文件不会复制过去
        copy{
            from "${sourceDir}"
            include "res/**"
            include "src/**"
            include "jsb-adapter/**"

            into outputDir
        }

        copy {
            from "${sourceDir}/main.js"
            from "${sourceDir}/project.json"
            into outputDir
        }
    }

2.虚拟返回按键监听：

    @Override
    public boolean dispatchKeyEvent(KeyEvent event) {
        Log.d(TAG, "dispatchKeyEvent:" + event.getKeyCode());
        //拦截返回键
        if (event.getKeyCode() == KeyEvent.KEYCODE_BACK){
        //判断触摸UP事件才会进行返回事件处理
            if (event.getAction() == KeyEvent.ACTION_UP) {
                onBackPressed();
            }
            //只要是返回事件，直接返回true，表示消费掉
            return true;
        }
        return super.dispatchKeyEvent(event);
    }