Android-7 Kotlin实现DrawerLayout

上周一个兄弟过来,再加上自己懒了一下,没有及时更新,所以今天补上,然后这周应该还有一篇;

学习一项技术最好的方式,就是多学习学习好的代码,前几天看了Google Android的todoapp,主要是想学习下MVP,不过看到里面的DrawerLayout,觉得很不错,之前一直用slidingmenu,所以,这次用KotlinDrawerLayout来实现下,然后备用:

先实现接口:

DrawerLayoutManager


package com.vslimit.kotlindemo.ui

import android.content.Intent
import android.support.design.widget.NavigationView
import android.support.v4.widget.DrawerLayout
import com.vslimit.kotlindemo.extensions.ctx
import com.vslimit.kotlindemo.util.Const

/**
 * Created by vslimit on 17/1/6.
 */
interface DrawerLayoutManager {

    val drawerLayout: DrawerLayout

    fun selectDrawer(itemId: Int, selItemId: Int) {
        if (itemId != selItemId) {
            val intent = Intent(drawerLayout.ctx, Const.DRAWER_MAP[itemId])
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TASK)
            drawerLayout.ctx.startActivity(intent)
        }
    }

    fun setupDrawerContent(navigationView: NavigationView, itemId: Int) {
        navigationView.setNavigationItemSelectedListener { menuItem ->
            selectDrawer(menuItem.itemId, itemId)
            menuItem.isChecked = true
            drawerLayout.closeDrawers()
            true
        }
    }
}

里面完成了抽屉菜单的Activity切换,在Const中定义了menuItem.itemId对应的Activity


val DRAWER_MAP = hashMapOf(R.id.drawLayoutMain to MainActivity::class.java, R.id.drawLayoutTask to TasksActivity::class.java)

新建一个TasksActivityactivity_tasks.xml布局:





    

        

        
    

    


这时,TasksActivity需要继承DrawerLayoutManager接口,


package com.vslimit.kotlindemo.activity

import android.os.Bundle
import android.support.design.widget.NavigationView
import android.support.v4.view.GravityCompat
import android.support.v4.widget.DrawerLayout
import android.view.MenuItem
import com.vslimit.kotlindemo.R
import com.vslimit.kotlindemo.ui.DrawerLayoutManager
import org.jetbrains.anko.find

class TasksActivity(override val layoutResourceId: Int = R.layout.activity_tasks ) : BaseActivity(),DrawerLayoutManager {
    override val drawerLayout by lazy { find(R.id.drawer_layout) }
    val navigationView by lazy { find(R.id.nav_view) }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setupDrawerContent(navigationView, R.id.drawLayoutTask)
    }

    override fun onOptionsItemSelected(item: MenuItem): Boolean {
        when (item.itemId) {
            android.R.id.home -> {
                drawerLayout.openDrawer(GravityCompat.START)
                return true
            }
        }
        return super.onOptionsItemSelected(item)
    }

}

这样,我们就实现了侧滑菜单,ui设计采用的是Google Android的todoapp设计,代码也是根据todoapp进行了一定的封装,效果如下:

Android-7 Kotlin实现DrawerLayout_第1张图片
Screenshot_2017-01-09-21-03-04.png

大家如果喜欢就去git下star下吧。

下期预告:Kontlin中的MVP

DrawerLayout的代码详见:https://github.com/vslimit/kotlindemo

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