up

app/src/main/AndroidManifest.xml

@@ -27,14 +27,14 @@
             android:theme="@style/AppTheme.Light"
             tools:ignore="AllowBackup,GoogleAppIndexingWarning,UnusedAttribute">
         <activity
-                android:name=".ui.main.MainActivity"
-                android:label="@string/app_name">
+            android:name=".ui.welcome.WelcomeActivity"
+            android:label="@string/app_name">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
-
                 <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
         </activity>
+        <activity android:name=".ui.main.MainActivity" />
         <activity android:name=".ui.replacerule.ReplaceRuleActivity"/>
         <activity android:name=".ui.search.SearchActivity"/>
         <activity android:name=".ui.about.AboutActivity"/>
@@ -47,6 +47,7 @@
         <activity android:name=".ui.about.DonateActivity" />
         <activity android:name=".ui.bookinfo.BookInfoActivity" />
         <activity android:name=".ui.bookinfo.BookInfoEditActivity" />
+
     </application>
 
 </manifest>

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

@@ -0,0 +1,50 @@
+package io.legado.app.ui.welcome
+
+import android.animation.Animator
+import android.animation.ValueAnimator
+import android.os.Bundle
+import androidx.lifecycle.AndroidViewModel
+import io.legado.app.R
+import io.legado.app.base.BaseActivity
+import io.legado.app.lib.theme.ThemeStore
+import io.legado.app.ui.main.MainActivity
+import io.legado.app.utils.getViewModel
+import kotlinx.android.synthetic.main.activity_welcome.*
+import org.jetbrains.anko.startActivity
+
+class WelcomeActivity : BaseActivity<AndroidViewModel>() {
+    override val viewModel: AndroidViewModel
+        get() = getViewModel(AndroidViewModel::class.java)
+    override val layoutID: Int
+        get() = R.layout.activity_welcome
+
+    override fun onViewModelCreated(viewModel: AndroidViewModel, savedInstanceState: Bundle?) {
+        iv_bg.setColorFilter(ThemeStore.accentColor(this))
+        val welAnimator = ValueAnimator.ofFloat(1f, 0f).setDuration(800)
+        welAnimator.startDelay = 100
+        welAnimator.addUpdateListener { animation ->
+            val alpha = animation.animatedValue as Float
+            iv_bg.alpha = alpha
+        }
+        welAnimator.addListener(object : Animator.AnimatorListener {
+            override fun onAnimationStart(animation: Animator) {
+                startActivity<MainActivity>()
+                finish()
+            }
+
+            override fun onAnimationEnd(animation: Animator) {
+
+            }
+
+            override fun onAnimationCancel(animation: Animator) {
+
+            }
+
+            override fun onAnimationRepeat(animation: Animator) {
+
+            }
+        })
+        welAnimator.start()
+    }
+
+}

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

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <ImageView
+        android:id="@+id/iv_bg"
+        android:layout_width="wrap_content"
+        android:layout_height="match_parent"
+        android:src="@drawable/image_welcome"
+        android:scaleType="fitCenter"
+        android:contentDescription="@string/welcome" />
+
+</LinearLayout>