Android(安卓)简单通用的基类

在写项目的时候一般都会写个BaseActivity ，来减少重复代码编写和共有内容的整理封装(侵删)

前几天，用kotlin语言写了个BaseActivity和BaseAdapter

界面是多么不堪入目，不过不要在意细节，我也挺绝望的（写PDA多了发现这样也比那好看多了）

引用

dependencies {    implementation fileTree(dir: 'libs', include: ['*.jar'])    implementation"org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"    implementation 'com.android.support:appcompat-v7:26.1.0'    implementation 'com.android.support:design:26.1.0'    implementation 'com.android.support.constraint:constraint-layout:1.0.2'    testImplementation 'junit:junit:4.12'    implementation "org.jetbrains.anko:anko-sdk15:0.9.1"    implementation "org.jetbrains.anko:anko-appcompat-v7:0.9.1"    implementation "org.jetbrains.anko:anko-design:0.9.1"    androidTestImplementation 'com.android.support.test:runner:1.0.1'    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'    implementation 'com.github.d-max:spots-dialog:0.7@aar'    implementation ('com.android.support:cardview-v7:26.1.0'){        exclude group: 'com.android.support'    }

BaseAdapter

abstract class BaseActivity:AppCompatActivity(), BaseView {    abstract fun getContentViewId():Int    var mContext: Context?=null    lateinit var dialog: SpotsDialog    override fun onCreate(savedInstanceState: Bundle?) {        super.onCreate(savedInstanceState)        setContentView(getContentViewId())        mContext=this        dialog=SpotsDialog(this)        initView()        initEvent()    }   //显示加载    fun showLoad(){        dialog.show()    }    //隐藏加载    fun disLoad(){        dialog.dismiss()    }    //提示    override fun showTipMessage( msg: String) {       Toast.makeText(this,msg,Toast.LENGTH_SHORT).show()    }    override fun getNetKey(): String {        return javaClass.simpleName    }    //移除    fun removeActivity(cls:Class<*>){        ActivityManager.instance.finishActivity(cls)    }    fun actCount(){        ActivityManager.instance.ListCount()    }    /**     * 触发手机返回按钮     */    override fun onBackPressed(){        ActivityManager.instance.removeActivity(this@BaseActivity)    }   //anko    fun backShow(){        alert("返回会清除该页面数据") {            title("提示")            yesButton { onBackPressed() }            noButton { }        }.show()    }   //anko    fun  setDialog(title:String, content:String ){        alert(content) {            title(title)            yesButton {  }            noButton { }        }.show()    }    override fun onDestroy() {       // presenter.dispose()       // presenter.detach()        super.onDestroy()    }    /**     * 触发手机返回按钮     */   fun onFinish(){        ActivityManager.instance.removeActivity(this@BaseActivity)    }}

由于写BaseAdapter是用kotlin的file写的，emmmm。。。有点小问题，不过不影响使用

class BaseViewHolder(itemView: View, private val mOnItemClickListener:BaseAdapter.OnItemClickListener?, private val mOnItemLongClickListener: BaseAdapter.OnItemLongClickListener?): RecyclerView.ViewHolder(itemView) , View.OnClickListener, View.OnLongClickListener {    override fun onClick(v: View?) {        mOnItemClickListener.let { v?.let { it1 -> mOnItemClickListener?.onItemClick(it1, getLayoutPosition()) } }    }    override fun onLongClick(v: View?): Boolean {        if (mOnItemLongClickListener != null) {            v?.let { it ->                mOnItemLongClickListener?.onLongItemClick(it, getLayoutPosition())            }        }        return true    }    private var views: SparseArray? = null    init {        itemView.setOnClickListener(this)        itemView.setOnLongClickListener(this)        this.views = SparseArray()    }    fun getTextView(viewId: Int): TextView {        return retrieveView(viewId)    }    fun getButton(viewId: Int): Button {        return retrieveView(viewId)    }    fun getImageView(viewId: Int): ImageView {        return retrieveView(viewId)    }    fun getView(viewId: Int): View {        return retrieveView(viewId)    }    fun getLinearlayout(viewId: Int): LinearLayout {        return retrieveView(viewId)    }    fun getCheckBox(viewId: Int): CheckBox {        return retrieveView(viewId)    }    fun  retrieveView(viewId: Int): T {        var v = views?.get(viewId)        if (v == null) {            v = itemView.findViewById(viewId)            views?.put(viewId, v)        }        return (v as T?)!!    }    abstract class BaseAdapter @JvmOverloads constructor(protected val context: Context, protected var layoutResId: Int, var datas: MutableList) : RecyclerView.Adapter() {        private var mOnItemClickListener: OnItemClickListener? = null        private var mOnItemLongClickListener: OnItemLongClickListener? = null        fun addDatas(datas: List) {            if (datas != null) {                this.datas?.addAll(datas)                notifyItemRangeChanged(this.datas!!.size - datas.size, datas.size)            }        }        fun clearData() {            datas?.clear()            notifyDataSetChanged()        }        override fun onCreateViewHolder(viewGroup: ViewGroup, viewType: Int): BaseViewHolder {            val view = LayoutInflater.from(context).inflate(layoutResId, viewGroup, false)            return BaseViewHolder(view, mOnItemClickListener, mOnItemLongClickListener)        }        override fun onBindViewHolder(holder: BaseViewHolder?, position: Int) {            val item = getItem(position)            convert(holder as H, item)        }        override fun getItemViewType(position: Int): Int {            return super.getItemViewType(position)        }        fun getItem(position: Int): T? {            return if (position >= datas!!.size) null else datas!![position]        }        override fun getItemCount(): Int {            return if (datas == null || datas!!.size <= 0) 0 else datas.size        }        fun clear() {            val it = datas!!.iterator()            while (it.hasNext()) {                val position = datas!!.indexOf(it.next())                it.remove()                notifyItemRemoved(position)            }        }        fun addData(position: Int, list: List?) {            list.let {                if (list?.count() as Int > 0) {                    for (t in list) {                        datas!!.add(position, t)                        notifyItemInserted(position)                    }                }            }        }        fun removeItem(t: T) {            datas?.remove(t)            notifyItemRemoved(datas!!.indexOf(t))        }        public interface OnItemClickListener {            fun onItemClick(view: View, position: Int)        }        public interface OnItemLongClickListener {            fun onLongItemClick(view: View, position: Int)        }        protected abstract fun convert(viewHoder: H, item: T?)        public fun setOnItemClickListener(listener: OnItemClickListener) {            this.mOnItemClickListener = listener        }        public fun setOnLongClickListener(listener: OnItemLongClickListener) {            this.mOnItemLongClickListener = listener        }    }}

写了个TestAdapter继承这个BaseAdapter

class TestAdapter (context:Context,layoutId:Int,list:ArrayList):BaseViewHolder.BaseAdapter(context,layoutId,list){    override fun convert(viewHoder: BaseViewHolder, item: String?) {        viewHoder.getTextView(R.id.textitem).text=item    }}

在Activity的调用

 adapter= TestAdapter(this,R.layout.test_item,list);        recyclerView.adapter=adapter

kotlin的绑定adapter这样的==java的setadapter()

recyclerView.adapter=adapter

对item的点击

     //点击        adapter?.setOnItemClickListener(object :BaseViewHolder.BaseAdapter.OnItemClickListener{            override fun onItemClick(view: View, position: Int) {               showTipMessage(list[position])            }        })        //长按        adapter?.setOnLongClickListener(object :BaseViewHolder.BaseAdapter.OnItemLongClickListener{            override fun onLongItemClick(view: View, position: Int) {                showTipMessage("长点击:"+list[position])            }        })

大致就是这样吧，具体业务还是得具体分析，继续往里面进行拓展，还需要多磨合才了解kotlin

代码

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