feat(MusicActivity,ILifeCircle):更新到第14节课，view通知presenter生命周期变化

app/src/main/java/net/shuzhi/mvvmdemo/lifecycle/ILifeCircle.kt

@@ -0,0 +1,19 @@
+package net.shuzhi.mvvmdemo.lifecycle
+
+/**
+ * @author 梁爽
+ * @create 2020/11/5 12:05
+ */
+interface ILifeCircle {
+    fun onCreate()
+
+    fun onStart()
+
+    fun onResume()
+
+    fun onPause()
+
+    fun onStop()
+
+    fun onDestroy()
+}

app/src/main/java/net/shuzhi/mvvmdemo/musicList/MusicPresenter.kt

@@ -1,13 +1,14 @@
 package net.shuzhi.mvvmdemo.musicList
 
+import net.shuzhi.mvvmdemo.lifecycle.ILifeCircle
 import net.shuzhi.mvvmdemo.player.DataListenerContainer
 import net.shuzhi.mvvmdemo.player.domain.Music
 
 /**
  * @author 梁爽
  * @create 2020/11/4 23:20
  */
-class MusicPresenter {
+class MusicPresenter : ILifeCircle{
 
     private val musicModel by lazy {
         MusicModel()
@@ -42,4 +43,30 @@ class MusicPresenter {
 
         })
     }
+
+    override fun onCreate() {
+        //监听GPS信号变化等等
+        println("开始监听GPS")
+    }
+
+    override fun onStart() {
+        TODO("Not yet implemented")
+    }
+
+    override fun onResume() {
+        TODO("Not yet implemented")
+    }
+
+    override fun onPause() {
+        TODO("Not yet implemented")
+    }
+
+    override fun onStop() {
+        //停止监听GPS
+        println("停止监听GPS")
+    }
+
+    override fun onDestroy() {
+        TODO("Not yet implemented")
+    }
 }

app/src/main/java/net/shuzhi/mvvmdemo/musicList/MusicsActivity.kt

@@ -18,6 +18,32 @@ class MusicsActivity : AppCompatActivity() {
         setContentView(R.layout.activity_musics)
         initDataListener()
         initViewListeners()
+        musicPresenter.onCreate()
+    }
+
+    override fun onStart() {
+        super.onStart()
+        musicPresenter.onStart()
+    }
+
+    override fun onResume() {
+        super.onResume()
+        musicPresenter.onResume()
+    }
+
+    override fun onPause() {
+        super.onPause()
+        musicPresenter.onResume()
+    }
+
+    override fun onStop() {
+        super.onStop()
+        musicPresenter.onStop()
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        musicPresenter.onDestroy()
     }
 
     /**