1.添加底部导航矢量图标；

2.删除主题中的ActionBar；
3.修改若干资源文件；
4.添加ButterKnife插件。

app/build.gradle

@@ -9,6 +9,7 @@ android {
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+        vectorDrawables.useSupportLibrary = true
     }
     buildTypes {
         release {
@@ -16,6 +17,29 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
+
+    // 指定项目编码方式
+    compileOptions.encoding = "UTF-8"
+
+    // 指定编译版本
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    // 加快编译速度
+    dexOptions {
+        // 使用增量模式构建
+        // incremental true
+        // 最大堆内存
+        javaMaxHeapSize "8g"
+        // 是否支持大工程模式
+        jumboMode = true
+        // 预编译
+        preDexLibraries = true
+        // 线程数
+        threadCount = 8
+    }
 }
 
 dependencies {
@@ -27,4 +51,6 @@ dependencies {
     testImplementation 'junit:junit:4.12'
     androidTestImplementation 'com.android.support.test:runner:1.0.2'
     androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
+    implementation 'com.jakewharton:butterknife:8.8.1'
+    annotationProcessor 'com.jakewharton:butterknife-compiler:8.8.1'
 }

app/src/main/java/cn/minbb/edu/MainActivity.java

@@ -3,42 +3,39 @@ package cn.minbb.edu;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.design.widget.BottomNavigationView;
+import android.support.v4.view.ViewPager;
 import android.support.v7.app.AppCompatActivity;
 import android.view.MenuItem;
-import android.widget.TextView;
 
-public class MainActivity extends AppCompatActivity {
+import butterknife.BindView;
+import butterknife.ButterKnife;
 
-    private TextView mTextMessage;
+public class MainActivity extends AppCompatActivity implements BottomNavigationView.OnNavigationItemSelectedListener {
 
-    private BottomNavigationView.OnNavigationItemSelectedListener mOnNavigationItemSelectedListener
-            = new BottomNavigationView.OnNavigationItemSelectedListener() {
-
-        @Override
-        public boolean onNavigationItemSelected(@NonNull MenuItem item) {
-            switch (item.getItemId()) {
-                case R.id.navigation_home:
-                    mTextMessage.setText(R.string.title_home);
-                    return true;
-                case R.id.navigation_dashboard:
-                    mTextMessage.setText(R.string.title_dashboard);
-                    return true;
-                case R.id.navigation_notifications:
-                    mTextMessage.setText(R.string.title_notifications);
-                    return true;
-            }
-            return false;
-        }
-    };
+    @BindView(R.id.viewPager)
+    ViewPager viewPager;
+    @BindView(R.id.navigation)
+    BottomNavigationView navigation;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
+        ButterKnife.bind(this);
 
-        mTextMessage = (TextView) findViewById(R.id.message);
-        BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.navigation);
-        navigation.setOnNavigationItemSelectedListener(mOnNavigationItemSelectedListener);
+        navigation.setOnNavigationItemSelectedListener(this);
     }
 
+    @Override
+    public boolean onNavigationItemSelected(@NonNull MenuItem item) {
+        switch (item.getItemId()) {
+            case R.id.navigation_1:
+                return true;
+            case R.id.navigation_2:
+                return true;
+            case R.id.navigation_3:
+                return true;
+        }
+        return false;
+    }
 }

app/src/main/res/drawable/ic_home_white_24dp.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M10,20v-6h4v6h5v-8h3L12,3 2,12h3v8z"/>
+</vector>

app/src/main/res/drawable/ic_import_contacts_white_24dp.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M21,5c-1.11,-0.35 -2.33,-0.5 -3.5,-0.5 -1.95,0 -4.05,0.4 -5.5,1.5 -1.45,-1.1 -3.55,-1.5 -5.5,-1.5S2.45,4.9 1,6v14.65c0,0.25 0.25,0.5 0.5,0.5 0.1,0 0.15,-0.05 0.25,-0.05C3.1,20.45 5.05,20 6.5,20c1.95,0 4.05,0.4 5.5,1.5 1.35,-0.85 3.8,-1.5 5.5,-1.5 1.65,0 3.35,0.3 4.75,1.05 0.1,0.05 0.15,0.05 0.25,0.05 0.25,0 0.5,-0.25 0.5,-0.5L23,6c-0.6,-0.45 -1.25,-0.75 -2,-1zM21,18.5c-1.1,-0.35 -2.3,-0.5 -3.5,-0.5 -1.7,0 -4.15,0.65 -5.5,1.5L12,8c1.35,-0.85 3.8,-1.5 5.5,-1.5 1.2,0 2.4,0.15 3.5,0.5v11.5z"/>
+</vector>

app/src/main/res/drawable/ic_person_white_24dp.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M12,12c2.21,0 4,-1.79 4,-4s-1.79,-4 -4,-4 -4,1.79 -4,4 1.79,4 4,4zM12,14c-2.67,0 -8,1.34 -8,4v2h16v-2c0,-2.66 -5.33,-4 -8,-4z"/>
+</vector>

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

@@ -7,15 +7,13 @@
     android:layout_height="match_parent"
     tools:context=".MainActivity">
 
-    <TextView
-        android:id="@+id/message"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_marginStart="@dimen/activity_horizontal_margin"
-        android:layout_marginLeft="@dimen/activity_horizontal_margin"
-        android:layout_marginTop="@dimen/activity_vertical_margin"
-        android:text="@string/title_home"
-        app:layout_constraintLeft_toLeftOf="parent"
+    <android.support.v4.view.ViewPager
+        android:id="@+id/viewPager"
+        android:layout_width="0dp"
+        android:layout_height="0dp"
+        app:layout_constraintBottom_toTopOf="@+id/navigation"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
     <android.support.design.widget.BottomNavigationView

app/src/main/res/menu/navigation.xml

@@ -2,18 +2,18 @@
 <menu xmlns:android="http://schemas.android.com/apk/res/android">
 
     <item
-        android:id="@+id/navigation_home"
-        android:icon="@drawable/ic_home_black_24dp"
-        android:title="@string/title_home" />
+        android:id="@+id/navigation_1"
+        android:icon="@drawable/ic_home_white_24dp"
+        android:title="首页" />
 
     <item
-        android:id="@+id/navigation_dashboard"
-        android:icon="@drawable/ic_dashboard_black_24dp"
-        android:title="@string/title_dashboard" />
+        android:id="@+id/navigation_2"
+        android:icon="@drawable/ic_import_contacts_white_24dp"
+        android:title="我的课程" />
 
     <item
-        android:id="@+id/navigation_notifications"
-        android:icon="@drawable/ic_notifications_black_24dp"
-        android:title="@string/title_notifications" />
+        android:id="@+id/navigation_3"
+        android:icon="@drawable/ic_person_white_24dp"
+        android:title="个人中心" />
 
 </menu>

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

@@ -1,6 +1,3 @@
 <resources>
-    <string name="app_name">EDU</string>
-    <string name="title_home">Home</string>
-    <string name="title_dashboard">Dashboard</string>
-    <string name="title_notifications">Notifications</string>
+    <string name="app_name">知学教育</string>
 </resources>

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

@@ -6,6 +6,22 @@
         <item name="colorPrimary">@color/colorPrimary</item>
         <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
         <item name="colorAccent">@color/colorAccent</item>
+        <!--将 ActionBar 隐藏,这里使用 ToolBar -->
+        <item name="windowActionBar">false</item>
+        <!-- 使用 API Level 22 以上编译的话，要拿掉前綴字 -->
+        <item name="windowNoTitle">true</item>
+        <!-- 去除阴影 ActionBar 阴影 -->
+        <item name="android:windowContentOverlay">@null</item>
+    </style>
+
+    <!-- Toolbar 标题字体大小 -->
+    <style name="Toolbar.TitleText" parent="TextAppearance.Widget.AppCompat.Toolbar.Title">
+        <item name="android:textSize">18sp</item>
+    </style>
+
+    <style name="AppTheme.NoActionBar">
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
     </style>
 
 </resources>