package com.android.app_base.base.view;
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import android.app.Activity;
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import android.content.Context;
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import android.content.Intent;
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import android.os.Bundle;
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import android.view.View;
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import android.view.ViewGroup;
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import android.view.Window;
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import android.view.inputmethod.InputMethodManager;
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import androidx.annotation.NonNull;
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import androidx.annotation.Nullable;
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import androidx.appcompat.app.AppCompatActivity;
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import androidx.databinding.DataBindingUtil;
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import androidx.databinding.ViewDataBinding;
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import androidx.drawerlayout.widget.DrawerLayout;
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import androidx.lifecycle.Observer;
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import androidx.lifecycle.ViewModelProvider;
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import com.android.app_base.action.TitleBarAction;
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import com.android.app_base.base.action.ClickAction;
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import com.android.app_base.base.viewmodel.BaseViewModel;
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import com.android.app_base.base.StateViewEnum;
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import com.blankj.utilcode.util.ToastUtils;
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import com.gyf.immersionbar.ImmersionBar;
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import com.hjq.bar.TitleBar;
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import java.lang.reflect.ParameterizedType;
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import java.lang.reflect.Type;
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/**
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* Activity基类,所有的 Activity 都要继承此类
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*/
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public abstract class BaseActivity<VDB extends ViewDataBinding,VM extends BaseViewModel> extends AppCompatActivity implements TitleBarAction, ClickAction {
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protected VDB binding;
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protected VM viewModel;
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private int viewModelId;
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/**
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* 标题栏对象
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*/
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private TitleBar mTitleBar;
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/**
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* 状态栏沉浸
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*/
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private ImmersionBar mImmersionBar;
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@Override
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protected void onCreate(@Nullable Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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//Layout初始化
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initLayout();
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//页面参数初始化方法
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initParam();
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//页面view初始化方法
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initView();
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//页面事件监听的方法，用于ViewModel层转到View层的事件注册
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initLiveDataObserve();
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//页面数据初始化方法
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initData();
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}
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@Override
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protected void onDestroy() {
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super.onDestroy();
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//解除Messenger注册
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// Messenger.getDefault().unregister(viewModel);
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if(binding != null){
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binding.unbind();
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}
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}
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/**
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* 初始化布局
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*/
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protected void initLayout(){
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//绑定 ViewDataBinding 和 ViewModel
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initViewDataBindingAndViewModel();
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//初始化状态视图
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initStateView();
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//初始化沉浸式状态栏和 titleBar
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initStatusBar();
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initSoftKeyboard();
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}
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/**
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* ViewDataBinding和 ViewModel的获取及相关绑定
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*/
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protected void initViewDataBindingAndViewModel() {
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if (getLayoutId() > 0) {
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binding = initViewBinding();
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}
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viewModelId = getVariableId();
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viewModel = initViewModel();
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if (binding != null){
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//关联ViewModel
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if (viewModelId > 0){
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binding.setVariable(viewModelId, viewModel);
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}
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//支持LiveData绑定xml，数据改变，UI自动会更新
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binding.setLifecycleOwner(this);
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//让ViewModel拥有View的生命周期感应
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getLifecycle().addObserver(viewModel);
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}
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}
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/**
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* 初始化ViewBinding
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*/
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protected VDB initViewBinding() {
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return DataBindingUtil.setContentView(this, getLayoutId());
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}
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/**
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* 初始化ViewModel
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* @return 返回一个ViewModel
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*/
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protected VM initViewModel() {
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Class<VM> vmClass;
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Type type = getClass().getGenericSuperclass();
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if (type instanceof ParameterizedType){
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vmClass = (Class) ((ParameterizedType) type).getActualTypeArguments()[1];
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} else {
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//如果没有指定泛型参数，则默认使用BaseViewModel
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vmClass = (Class<VM>) BaseViewModel.class;
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}
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return new ViewModelProvider(this, (ViewModelProvider.Factory) ViewModelProvider.AndroidViewModelFactory.getInstance(getApplication())).get(vmClass);
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}
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/**
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* 对状态视图liveData进行观察监听
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*/
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protected void initStateView() {
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viewModel.getStateViewLiveData().observe(this, new Observer<StateViewEnum>() {
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@Override
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public void onChanged(StateViewEnum stateViewEnum) {
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switch (stateViewEnum) {
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case DIALOG_LOADING:
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dialogLoading();
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break;
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case DIALOG_DISMISS:
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dialogDismiss();
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break;
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case DATA_LOADING:
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dataLoading();
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break;
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case DATA_FINISH:
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dataFinish();
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break;
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case DATA_ERROR:
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dataError();
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break;
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case DATA_NULL:
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dataNull();
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break;
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case NET_ERROR:
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netError();
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break;
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case HIDE:
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hide();
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break;
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default:
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break;
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}
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}
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});
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viewModel.getMessageLivaData().observe(this, new Observer<String>() {
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@Override
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public void onChanged(String message) {
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ToastUtils.showShort(message);
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}
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});
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}
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/**
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* 缺省页等状态视图的更新
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* 有需求的，在子类选择重写
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*/
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protected void dialogLoading() {
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}
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protected void dialogDismiss() {
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}
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protected void dataLoading() {
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}
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protected void dataFinish() {
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}
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protected void dataError() {
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}
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protected void dataNull() {
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}
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protected void netError() {
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}
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protected void hide() {
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}
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/**
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* 初始化沉浸式状态栏
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*/
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protected void initStatusBar(){
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if (isStatusBarImmersionEnabled()) {
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getImmersionBarConfig().init();
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// 设置标题栏沉浸()
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if (getTitleBar() != null) {
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ImmersionBar.setTitleBar(this, getTitleBar());
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getTitleBar().setOnTitleBarListener(this);
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}
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}
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}
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/**
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* 是否使用沉浸式状态栏,可以子类重写指定
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*/
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protected boolean isStatusBarImmersionEnabled() {
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return true;
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}
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/**
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* 获取状态栏沉浸的配置对象
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*/
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@NonNull
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public ImmersionBar getImmersionBarConfig() {
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if (mImmersionBar == null) {
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mImmersionBar = createStatusBarConfig();
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}
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return mImmersionBar;
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}
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/**
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* 创建状态栏沉浸的配置对象
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*/
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@NonNull
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protected ImmersionBar createStatusBarConfig() {
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return ImmersionBar.with(this)
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// 默认状态栏字体颜色为黑色
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.statusBarDarkFont(isStatusBarDarkFont(),0.2f);//不写默认为亮色
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}
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/**
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* 状态栏字体深色模式
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*/
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protected boolean isStatusBarDarkFont() {
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return true;
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}
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@Override
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@Nullable
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public TitleBar getTitleBar() {
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if (mTitleBar == null) {
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mTitleBar = obtainTitleBar(findViewById(Window.ID_ANDROID_CONTENT));
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}
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return mTitleBar;
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}
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/**
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* 获取根布局的id，由子类实现返回
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* @return layout的id
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*/
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public abstract int getLayoutId();
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/**
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* 获取ViewModel的id，由子类实现返回
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* @return BR中viewModel的id
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*/
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public abstract int getVariableId();
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/**
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* 初始化页面参数，例如从上一个activity传递过来的参数
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*/
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public abstract void initParam();
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/**
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* 初始化页面view，例如一些view的隐藏或显示,以及点击逻辑等用户交互
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*/
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public abstract void initView();
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/**
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* 初始化页面数据
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*/
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public abstract void initData();
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/**
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* 初始化LiveData的监听
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* 简单的数据展示可通过DataBinding直接双向绑定到xml中
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*/
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public abstract void initLiveDataObserve();
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@Override
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public void finish() {
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hideSoftKeyboard();
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super.finish();
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}
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/**
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* 隐藏软键盘
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*/
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protected void hideSoftKeyboard() {
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// 隐藏软键盘，避免软键盘引发的内存泄露
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View view = getCurrentFocus();
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if (view != null) {
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InputMethodManager manager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
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if (manager != null && manager.isActive(view)) {
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manager.hideSoftInputFromWindow(view.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
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view.clearFocus();
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}
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}
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}
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/**
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* 初始化软键盘
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*/
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protected void initSoftKeyboard() {
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// 点击外部隐藏软键盘，提升用户体验
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getContentView().setOnClickListener(v -> hideSoftKeyboard());
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}
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public ViewGroup getContentView() {
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return findViewById(Window.ID_ANDROID_CONTENT);
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}
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public Activity getSelfActivity() {
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return this;
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}
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/**
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* 如果当前的 Activity（singleTop 启动模式） 被复用时会回调
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*/
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@Override
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protected void onNewIntent(Intent intent) {
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super.onNewIntent(intent);
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// 设置为当前的 Intent，避免 Activity 被杀死后重启 Intent 还是最原先的那个
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setIntent(intent);
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}
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}
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