feat: 优化代码

app/src/main/AndroidManifest.xml

@@ -38,8 +38,8 @@
         </activity>
         <!--图标1-->
         <activity
-            android:name=".ui.welcome.Icon1Activity"
-            android:icon="@mipmap/ic_launcher_1"
+            android:name=".ui.welcome.Launcher1"
+            android:icon="@mipmap/launcher1"
             android:enabled="false">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

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

@@ -0,0 +1,54 @@
+package io.legado.app.help
+
+import android.content.ComponentName
+import android.content.pm.PackageManager
+import android.os.Build
+import io.legado.app.App
+import io.legado.app.ui.welcome.Launcher1
+import io.legado.app.ui.welcome.WelcomeActivity
+import org.jetbrains.anko.toast
+
+/**
+ * Created by GKF on 2018/2/27.
+ * 更换图标
+ */
+object LauncherIconHelp {
+    private val packageManager: PackageManager = App.INSTANCE.packageManager
+    private val componentNames = arrayListOf(
+        ComponentName(App.INSTANCE, Launcher1::class.java.name)
+    )
+
+    fun changeIcon(icon: String?) {
+        if (icon.isNullOrEmpty()) return
+        if (Build.VERSION.SDK_INT < 26) {
+            App.INSTANCE.toast("图标为矢量图标,Android8.0一下不支持")
+            return
+        }
+        var hasEnabled = false
+        componentNames.forEach {
+            if (it.className.equals(icon, true)) {
+                hasEnabled = true
+                //启用
+                packageManager.setComponentEnabledSetting(
+                    it,
+                    PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
+                    PackageManager.DONT_KILL_APP
+                )
+            } else {
+                //禁用
+                packageManager.setComponentEnabledSetting(
+                    it,
+                    PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
+                    PackageManager.DONT_KILL_APP
+                )
+            }
+        }
+        if (!hasEnabled) {
+            packageManager.setComponentEnabledSetting(
+                ComponentName(App.INSTANCE, WelcomeActivity::class.java.name),
+                PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
+                PackageManager.DONT_KILL_APP
+            )
+        }
+    }
+}

app/src/main/java/io/legado/app/ui/config/ThemeConfigFragment.kt

@@ -11,6 +11,7 @@ import io.legado.app.App
 import io.legado.app.R
 import io.legado.app.constant.EventBus
 import io.legado.app.help.AppConfig
+import io.legado.app.help.LauncherIconHelp
 import io.legado.app.lib.dialogs.alert
 import io.legado.app.lib.dialogs.noButton
 import io.legado.app.lib.dialogs.yesButton
@@ -26,7 +27,7 @@ class ThemeConfigFragment : PreferenceFragmentCompat(), SharedPreferences.OnShar
     override fun onCreatePreferences(savedInstanceState: Bundle?, rootKey: String?) {
         addPreferencesFromResource(R.xml.pref_config_theme)
 
-        findPreference<Preference>("defaultTheme")?.summary = "${items[getPrefInt("default_theme", 0)]}"
+        findPreference<Preference>("defaultTheme")?.summary = items[getPrefInt("default_theme", 0)]
     }
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
@@ -47,6 +48,7 @@ class ThemeConfigFragment : PreferenceFragmentCompat(), SharedPreferences.OnShar
     override fun onSharedPreferenceChanged(sharedPreferences: SharedPreferences?, key: String?) {
         sharedPreferences ?: return
         when (key) {
+            "launcherIcon" -> LauncherIconHelp.changeIcon(getPrefString(key))
             "transparentStatusBar" -> {
                 recreateActivities()
             }

app/src/main/java/io/legado/app/ui/welcome/WelcomeActivity.kt

@@ -48,4 +48,4 @@ open class WelcomeActivity : BaseActivity(R.layout.activity_welcome) {
 
 }
 
-class Icon1Activity : WelcomeActivity()
+class Launcher1 : WelcomeActivity()

app/src/main/res/values/arrays.xml

@@ -139,7 +139,7 @@
 
     <string-array name="icons">
         <item>ic_launcher</item>
-        <item>ic_launcher_1</item>
+        <item>launcher1</item>
     </string-array>
 
     <string-array name="chinese_mode">