升级 Kotlin 版本库及一些方法的优化，fix 接口改动问题。

Author: git-xuhao

app/src/main/java/com/hazz/kotlinmvp/ui/activity/WatchHistoryActivity.kt

@@ -7,6 +7,7 @@ import com.hazz.kotlinmvp.R
 import com.hazz.kotlinmvp.base.BaseActivity
 import com.hazz.kotlinmvp.mvp.model.bean.HomeBean
 import com.hazz.kotlinmvp.ui.adapter.WatchHistoryAdapter
+import com.hazz.kotlinmvp.utils.Preference
 import com.hazz.kotlinmvp.utils.StatusBarUtil
 import com.hazz.kotlinmvp.utils.WatchHistoryUtils
 import kotlinx.android.synthetic.main.activity_about.*
@@ -25,7 +26,7 @@ class WatchHistoryActivity : BaseActivity() {
     private var itemListData = ArrayList<HomeBean.Issue.Item>()
 
     companion object {
-        private val HISTORY_MAX = 20
+        private const val HISTORY_MAX = 20
     }
 
     override fun layoutId(): Int = R.layout.layout_watch_history
@@ -78,7 +79,7 @@ class WatchHistoryActivity : BaseActivity() {
             WatchHistoryUtils.getObject(Constants.FILE_WATCH_HISTORY_NAME, MyApplication.context,
                     keys[keyLength - it] as String) as HomeBean.Issue.Item
         }
-
+        
         return watchList
     }
 

app/src/main/java/com/hazz/kotlinmvp/utils/Preference.kt

@@ -16,13 +16,28 @@ class Preference<T>(val name:String, private val default:T) {
 
     companion object {
         private const val file_name = "kotlin_mvp_file"
-    }
 
-    private val prefs: SharedPreferences by lazy {
-        MyApplication.context.getSharedPreferences(file_name, Context.MODE_PRIVATE)
+        private val prefs: SharedPreferences by lazy {
+            MyApplication.context.getSharedPreferences(file_name, Context.MODE_PRIVATE)
+        }
+        /**
+         * 删除全部数据
+         */
+        fun clearPreference(){
+            prefs.edit().clear().apply()
+        }
+
+        /**
+         * 根据key删除存储数据
+         */
+        fun clearPreference(key : String){
+            prefs.edit().remove(key).apply()
+        }
     }
 
 
+
+
     operator fun getValue(thisRef: Any?, property: KProperty<*>): T {
         return getSharedPreferences(name, default)
     }
@@ -56,19 +71,7 @@ class Preference<T>(val name:String, private val default:T) {
         return res as T
     }
 
-    /**
-     * 删除全部数据
-     */
-    fun clearPreference(){
-        prefs.edit().clear().apply()
-    }
 
-    /**
-     * 根据key删除存储数据
-     */
-    fun clearPreference(key : String){
-        prefs.edit().remove(key).apply()
-    }
 
     /**
      * 序列化对象

config.gradle

@@ -5,8 +5,8 @@ ext{
             buildToolsVersion: "27.0.3",
             minSdkVersion    : 19,
             targetSdkVersion : 27,
-            versionCode      : 5,
-            versionName      : "1.2.2"
+            versionCode      : 6,
+            versionName      : "1.3.0"
     ]
 
     dependVersion = [