feat: 优化代码

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

@@ -1,7 +1,5 @@
 package io.legado.app.ui.welcome
 
-import android.animation.Animator
-import android.animation.ValueAnimator
 import android.content.Intent
 import android.os.Bundle
 import io.legado.app.R
@@ -16,34 +14,19 @@ import org.jetbrains.anko.startActivity
 open class WelcomeActivity : BaseActivity(R.layout.activity_welcome) {
 
     override fun onActivityCreated(savedInstanceState: Bundle?) {
-        iv_bg.setColorFilter(accentColor)
+        iv_book.setColorFilter(accentColor)
         // 避免从桌面启动程序后，会重新实例化入口类的activity
         if (intent.flags and Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT != 0) {
             finish()
             return
         }
-        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>()
-                if (getPrefBoolean(getString(R.string.pk_default_read))) {
-                    startActivity<ReadBookActivity>()
-                }
-                finish()
+        root_view.postDelayed({
+            startActivity<MainActivity>()
+            if (getPrefBoolean(getString(R.string.pk_default_read))) {
+                startActivity<ReadBookActivity>()
             }
-
-            override fun onAnimationEnd(animation: Animator) = Unit
-
-            override fun onAnimationCancel(animation: Animator) = Unit
-
-            override fun onAnimationRepeat(animation: Animator) = Unit
-        })
-        welAnimator.start()
+            finish()
+        }, 200)
     }
 
 }

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

@@ -1,15 +1,71 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/root_view"
     android:orientation="vertical"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:gravity="center_horizontal">
 
-    <ImageView
-        android:id="@+id/iv_bg"
+    <View
+        android:id="@+id/vw_title_line"
+        android:layout_width="6dp"
+        android:layout_height="0dp"
+        android:background="@color/colorAccent"
+        app:layout_constraintTop_toTopOf="@+id/tv_title"
+        app:layout_constraintBottom_toBottomOf="@+id/tv_title"
+        app:layout_constraintLeft_toLeftOf="@id/iv_book" />
+
+    <io.legado.app.ui.widget.text.AccentTextView
+        android:id="@+id/tv_title"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:ems="1"
+        android:text="阅读"
+        android:textSize="49sp"
+        app:layout_constraintVertical_bias="0.3"
+        app:layout_constraintRight_toLeftOf="@+id/tv_sub_title"
+        app:layout_constraintLeft_toRightOf="@+id/vw_title_line"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintBottom_toTopOf="@+id/iv_book"
+        tools:ignore="HardcodedText" />
+
+    <io.legado.app.ui.widget.text.AccentTextView
+        android:id="@+id/tv_sub_title"
         android:layout_width="wrap_content"
-        android:layout_height="match_parent"
-        android:src="@drawable/image_welcome"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="60dp"
+        android:ems="1"
+        android:text="享受美好时光"
+        android:textSize="16sp"
+        app:layout_constraintTop_toTopOf="@+id/tv_title"
+        app:layout_constraintLeft_toRightOf="@id/tv_title"
+        app:layout_constraintRight_toRightOf="@id/iv_book"
+        tools:ignore="HardcodedText" />
+
+    <ImageView
+        android:id="@+id/iv_book"
+        android:layout_width="120dp"
+        android:layout_height="120dp"
+        android:layout_marginBottom="32dp"
+        android:src="@drawable/icon_read_book"
         android:scaleType="fitCenter"
-        android:contentDescription="@string/welcome" />
+        android:contentDescription="@string/welcome"
+        app:layout_constraintBottom_toTopOf="@+id/tv_gzh"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent" />
+
+    <io.legado.app.ui.widget.text.AccentTextView
+        android:id="@+id/tv_gzh"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="关注公众号[开源阅读软件]\n看文章点广告支持作者"
+        android:layout_marginBottom="32dp"
+        android:gravity="center_horizontal"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        tools:ignore="HardcodedText" />
 
-</LinearLayout>
+</androidx.constraintlayout.widget.ConstraintLayout>