Android极简MVVM，从一个基类库谈起

abstractclassBaseActivity<VB : ViewDataBinding>(@LayoutReslayoutId: Int=0) :
AppCompatActivity(layoutId) {
privatevarmActionBarView: ActionBarView?=nullprivatevarmLayoutError: LinearLayout?=nullprivatevarmLayoutId=layoutIdlateinitvarmBinding: VBoverridefunonCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
try {
//默认状态栏为白底黑字darkMode(BaseConfig.statusBarDarkMode)
statusBarColor(ContextCompat.getColor(this, BaseConfig.statusBarColor))
setContentView(R.layout.activity_base)
valbaseChild=findViewById<LinearLayout>(R.id.layout_base_child)
mLayoutError=findViewById(R.id.layout_empty_or_error)
mActionBarView=findViewById(R.id.action_bar)
if (mLayoutId==0) {
mLayoutId=getLayoutId()
            }
if (savedInstanceState!=null&&getIntercept()) {
noEmptyBundle()
return            }
valchildView=layoutInflater.inflate(mLayoutId, null)
baseChild.addView(childView)
mBinding=DataBindingUtil.bind(childView)!!initView()
initData()
        } catch (e: Exception) {
e.printStackTrace()
noEmptyBundle()
        }
    }
/*** AUTHOR:AbnerMing* INTRODUCE:获取视图id*/openfungetLayoutId(): Int {
return0    }
openfuninitView() {}
/*** AUTHOR:AbnerMing* INTRODUCE:初始化数据*/abstractfuninitData()
/*** AUTHOR:AbnerMing* INTRODUCE:动态改变状态栏颜色和标题*/funsetDarkTitle(dark: Boolean, color: Int, title: String) {
try {
darkMode(dark)
statusBarColor(ContextCompat.getColor(this, color))
setBarTitle(title)
        } catch (e: Exception) {
e.printStackTrace()
        }
    }
/*** AUTHOR:AbnerMing* INTRODUCE:设置标题*/funsetBarTitle(title: String) {
mActionBarView!!.visibility=View.VISIBLEmActionBarView!!.setBarTitle(title)
    }
/*** AUTHOR:AbnerMing* INTRODUCE:隐藏左侧按钮*/funhintLeftMenu() {
mActionBarView!!.hintLeftBack()
    }
/*** AUTHOR:AbnerMing* INTRODUCE:获取ActionBarView*/fungetActionBarView(): ActionBarView {
returnmActionBarView!!    }
/*** AUTHOR:AbnerMing* INTRODUCE:隐藏标题栏*/funhintActionBar() {
mActionBarView?.visibility=View.GONE    }
/*** AUTHOR:AbnerMing* INTRODUCE:Bundle为空进行拦截，解决改变权限后重回App崩溃问题*/openfungetIntercept(): Boolean {
returnfalse    }
/*** AUTHOR:AbnerMing* INTRODUCE:Bundle为空时的逻辑处理，解决改变权限后重回App崩溃问题*/openfunnoEmptyBundle() {}
overridefunonDestroy() {
super.onDestroy()
try {
LiveDataBus.removeObserve(this)
LiveDataBus.removeStickyObserver(this)
        } catch (e: Exception) {
e.printStackTrace()
        }
    }
/*** AUTHOR:AbnerMing* INTRODUCE:透明状态栏*/funtranslucentWindow(dark: Boolean) {
try {
immersive(0, dark)
        } catch (e: Exception) {
e.printStackTrace()
        }
    }
/*** AUTHOR:AbnerMing* INTRODUCE:设置缺省页*/funsetEmptyOrError(view: View) {
mLayoutError?.visibility=View.VISIBLEmLayoutError?.removeAllViews()
mLayoutError?.addView(view)
    }
/*** AUTHOR:AbnerMing* INTRODUCE:隐藏*/funhintEmptyOrErrorView() {
mLayoutError?.visibility=View.GONE    }
/*** AUTHOR:AbnerMing* INTRODUCE:获取错误或为空的view*/fungetEmptyOrErrorView(): LinearLayout {
returnmLayoutError!!    }
}

abstractclassBaseVMActivity<VB : ViewDataBinding, BM : BaseViewModel>(@LayoutReslayoutId: Int=0) :
BaseActivity<VB>(layoutId) {
lateinitvarmViewModel: BMoverridefuninitData() {
mViewModel=getViewModel()!!valvariableId=getVariableId()
if (variableId!=-1) {
mBinding.setVariable(getVariableId(), mViewModel)
mBinding.executePendingBindings()
        }
initVMData()
observeLiveData()
initState()
    }
/*** AUTHOR:AbnerMing* INTRODUCE:获取绑定的xml id*/openfungetVariableId(): Int {
return-1    }
/*** AUTHOR:AbnerMing* INTRODUCE:初始化状态*/privatefuninitState() {
mViewModel.mStateViewLiveData.observe(this, {
when (it) {
StateLayoutEnum.DIALOG_LOADING-> {
dialogLoading()
                }
StateLayoutEnum.DIALOGD_DISMISS-> {
dialogDismiss()
                }
StateLayoutEnum.DATA_ERROR-> {
dataError()
                }
StateLayoutEnum.DATA_NULL-> {
dataEmpty()
                }
StateLayoutEnum.NET_ERROR-> {
netError()
                }
StateLayoutEnum.HIDE-> {
hide()
                }
            }
        })
    }
/*** AUTHOR:AbnerMing* INTRODUCE:初始化数据*/abstractfuninitVMData()
/*** AUTHOR:AbnerMing* INTRODUCE:LiveData的Observer*/openfunobserveLiveData() {
    }
/*** AUTHOR:AbnerMing* INTRODUCE:dialog加载*/openfundialogLoading() {}
/*** AUTHOR:AbnerMing* INTRODUCE:dialog隐藏*/openfundialogDismiss() {}
/*** AUTHOR:AbnerMing* INTRODUCE:数据错误*/openfundataError() {}
/*** AUTHOR:AbnerMing* INTRODUCE:数据为空*/openfundataEmpty() {}
/*** AUTHOR:AbnerMing* INTRODUCE:网络错误或请求错误*/openfunnetError() {}
/*** AUTHOR:AbnerMing* INTRODUCE:隐藏某些布局或者缺省页等*/openfunhide() {}
privatefungetViewModel(): BM? {
//这里获得到的是类的泛型的类型valtype=javaClass.genericSuperclassif (type!=null&&typeisParameterizedType) {
valactualTypeArguments=type.actualTypeArgumentsvaltClass=actualTypeArguments[1]
returnViewModelProvider(
this,
ViewModelProvider.AndroidViewModelFactory.getInstance(application)
            )
                .get(tClassasClass<BM>)
        }
returnnull    }
}