up

app/src/main/java/io/legado/app/help/ActivityHelp.kt

@@ -0,0 +1,108 @@
+package io.legado.app.help
+
+import android.app.Activity
+import java.lang.ref.WeakReference
+import java.util.*
+
+/**
+ * Activity管理器,管理项目中Activity的状态
+ */
+class ActivityHelp private constructor() {
+
+    companion object {
+
+        private var activities: MutableList<WeakReference<Activity>> = arrayListOf()
+
+        @Volatile
+        private var instance: ActivityHelp? = null
+
+        fun getInstance(): ActivityHelp? {
+            if (null == instance) {
+                synchronized(ActivityHelp::class.java) {
+                    if (null == instance) {
+                        instance = ActivityHelp()
+                    }
+                }
+            }
+            return instance
+        }
+    }
+
+    fun getActivities(): List<WeakReference<Activity>> {
+        return activities
+    }
+
+    /**
+     * 添加Activity
+     */
+    fun add(activity: Activity) {
+        activities.add(WeakReference(activity))
+    }
+
+    /**
+     * 移除Activity
+     */
+    fun remove(activity: Activity) {
+        for (temp in activities) {
+            if (null != temp.get() && temp.get() === activity) {
+                activities.remove(temp)
+                break
+            }
+        }
+    }
+
+    /**
+     * 移除Activity
+     */
+    fun remove(activityClass: Class<*>) {
+        val iterator = activities.iterator()
+        while (iterator.hasNext()) {
+            val item = iterator.next()
+            if (item.get()?.javaClass == activityClass) {
+                iterator.remove()
+            }
+        }
+    }
+
+    /**
+     * 关闭指定 activity
+     */
+    fun finishActivity(vararg activities: Activity) {
+        for (activity in activities) {
+            activity?.finish()
+        }
+    }
+
+    /**
+     * 关闭指定 activity(class)
+     */
+    fun finishActivity(vararg activityClasses: Class<*>) {
+        val waitFinish = ArrayList<WeakReference<Activity>>()
+        for (temp in activities) {
+            for (activityClass in activityClasses) {
+                if (temp.get()?.javaClass == activityClass) {
+                    waitFinish.add(temp)
+                    break
+                }
+            }
+        }
+        for (activityWeakReference in waitFinish) {
+            activityWeakReference.get()?.finish()
+        }
+    }
+
+    /**
+     * 判断指定Activity是否存在
+     */
+    fun isExist(activityClass: Class<*>): Boolean? {
+        var result = false
+        for (item in activities) {
+            if (item.get()?.javaClass == activityClass) {
+                result = true
+                break
+            }
+        }
+        return result
+    }
+
+}

app/src/main/java/io/legado/app/receiver/MediaButtonReceiver.kt

@@ -24,16 +24,15 @@ class MediaButtonReceiver : BroadcastReceiver() {
                 val keycode = event.keyCode
                 val action = event.action
 
-                val command: String? = null
+                var command = false
                 when (keycode) {
                     KeyEvent.KEYCODE_MEDIA_STOP, KeyEvent.KEYCODE_MEDIA_PAUSE, KeyEvent.KEYCODE_MEDIA_PLAY, KeyEvent.KEYCODE_HEADSETHOOK, KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE -> {
+                        command = true
                     }
-                    else -> {
-                    }
-                }//                    command = ReadAloudService.ActionMediaButton;
-                if (command != null) {
+                }
+                if (command) {
                     if (action == KeyEvent.ACTION_DOWN) {
-                        readAloud(context, command)
+                        readAloud(context)
                         return true
                     }
                 }
@@ -41,7 +40,7 @@ class MediaButtonReceiver : BroadcastReceiver() {
             return false
         }
 
-        private fun readAloud(context: Context, command: String?) {
+        private fun readAloud(context: Context) {
 
         }
     }