JetPack组件升级

Author: fmtcias

app/src/main/java/com/fmt/github/base/activity/BaseDataBindActivity.kt

@@ -2,7 +2,6 @@ package com.fmt.github.base.activity
 
 import androidx.databinding.DataBindingUtil
 import androidx.databinding.ViewDataBinding
-import kotlinx.coroutines.cancel
 
 abstract class BaseDataBindActivity<DB : ViewDataBinding> : BaseActivity() {
 

app/src/main/java/com/fmt/github/base/fragment/BaseDataBindVMFragment.kt

@@ -30,6 +30,7 @@ abstract class BaseDataBindVMFragment<DB : ViewDataBinding> : BaseVMFragment() {
 
     override fun onDestroy() {
         super.onDestroy()
-        mDataBind.unbind()
+        if (::mDataBind.isInitialized)
+            mDataBind.unbind()
     }
 }

app/src/main/java/com/fmt/github/base/fragment/BaseVMFragment.kt

@@ -17,6 +17,7 @@ import com.fmt.github.ext.errorToast
 
 /**
  * Fragment懒加载
+ * 采用ViewPager2 + FragmentStateAdapter + onResume方法实现
  */
 abstract class BaseVMFragment : Fragment() {
 
@@ -52,6 +53,7 @@ abstract class BaseVMFragment : Fragment() {
         initView()
     }
 
+    //onResume方法判断是否已经加载过数据
     override fun onResume() {
         super.onResume()
         lazyLoadData()
@@ -63,7 +65,7 @@ abstract class BaseVMFragment : Fragment() {
             initData()
         }
     }
-
+    //监听页面的三种状态：加载中、加载成功、加载失败
     private fun initViewModelAction() {
         this.getViewModel().let { baseViewModel ->
             baseViewModel.mStateLiveData.observe(this, Observer { stateActionState ->

app/src/main/java/com/fmt/github/ext/DataBindExt.kt

@@ -9,6 +9,7 @@ import android.widget.ImageView
 import androidx.core.content.ContextCompat
 import androidx.databinding.BindingAdapter
 import androidx.databinding.BindingConversion
+import androidx.databinding.ViewDataBinding
 import com.fmt.github.AppContext
 import com.fmt.github.GlideApp
 import com.fmt.github.R