feat: 优化

app/src/main/java/io/legado/app/ui/main/MainActivity.kt

@@ -26,13 +26,14 @@ import io.legado.app.ui.main.rss.RssFragment
 import io.legado.app.ui.widget.dialog.TextDialog
 import io.legado.app.utils.*
 import kotlinx.android.synthetic.main.activity_main.*
+import org.jetbrains.anko.toast
 
 class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
     BottomNavigationView.OnNavigationItemSelectedListener,
     ViewPager.OnPageChangeListener by ViewPager.SimpleOnPageChangeListener() {
     override val viewModel: MainViewModel
         get() = getViewModel(MainViewModel::class.java)
-
+    private var exitTime: Long = 0
     private var pagePosition = 0
     private val fragmentId = arrayOf(0, 1, 2, 3)
     private val fragmentMap = mapOf<Int, Fragment>(
@@ -105,9 +106,15 @@ class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
                         return true
                     }
                     if (!BaseReadAloudService.pause) {
+                        if (System.currentTimeMillis() - exitTime > 2000) {
+                            toast(R.string.double_click_exit)
+                            exitTime = System.currentTimeMillis()
+                        } else {
                             moveTaskToBack(true)
                             return true
                         }
+                        return false
+                    }
                 }
             }
         }
@@ -121,6 +128,15 @@ class MainActivity : VMBaseActivity<MainViewModel>(R.layout.activity_main),
         }
     }
 
+    override fun finish() {
+        if (System.currentTimeMillis() - exitTime > 2000) {
+            toast(R.string.double_click_exit)
+            exitTime = System.currentTimeMillis()
+        } else {
+            super.finish()
+        }
+    }
+
     override fun onDestroy() {
         super.onDestroy()
         ReadAloud.stop(this)