初始化

app/build.gradle

@@ -24,7 +24,7 @@ android {
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
-    implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     implementation 'androidx.appcompat:appcompat:1.0.2'
     implementation 'androidx.core:core-ktx:1.0.2'
     implementation 'androidx.legacy:legacy-support-v4:1.0.0'

app/src/main/AndroidManifest.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-          xmlns:tools="http://schemas.android.com/tools" package="io.legado.app">
+          xmlns:tools="http://schemas.android.com/tools"
+          package="io.legado.app">
 
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
@@ -16,7 +17,7 @@
     <uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS"/>
 
     <application
-            android:name="io.legado.app.App"
+            android:name=".App"
             android:allowBackup="true"
             android:icon="@mipmap/ic_launcher"
             android:label="@string/app_name"
@@ -24,9 +25,12 @@
             android:supportsRtl="true"
             android:theme="@style/AppTheme"
             tools:ignore="AllowBackup,GoogleAppIndexingWarning">
-
+        <activity android:name=".ui.search.SearchActivity">
+        </activity>
+        <activity android:name=".ui.about.AboutActivity">
+        </activity>
         <activity
-                android:name="io.legado.app.ui.main.MainActivity"
+                android:name=".ui.main.MainActivity"
                 android:label="@string/app_name"
                 android:theme="@style/AppTheme.NoActionBar">
             <intent-filter>
@@ -35,7 +39,6 @@
                 <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
         </activity>
-
     </application>
 
 </manifest>

app/src/main/java/io/legado/app/ui/about/AboutActivity.kt

@@ -0,0 +1,13 @@
+package io.legado.app.ui.about
+
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import io.legado.app.R
+
+class AboutActivity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_about)
+    }
+}

app/src/main/java/io/legado/app/ui/search/SearchActivity.kt

@@ -0,0 +1,13 @@
+package io.legado.app.ui.search
+
+import android.os.Bundle
+import androidx.appcompat.app.AppCompatActivity
+import io.legado.app.R
+
+class SearchActivity : AppCompatActivity() {
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_search)
+    }
+}

app/src/main/res/layout/activity_about.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:tools="http://schemas.android.com/tools"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        tools:context="io.legado.app.ui.about.AboutActivity">
+
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/activity_search.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout
+        xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:tools="http://schemas.android.com/tools"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        tools:context="io.legado.app.ui.search.SearchActivity">
+
+</androidx.constraintlayout.widget.ConstraintLayout>