增加新增按钮

app/src/main/java/com/navinfo/volvo/MainActivity.kt

@@ -1,8 +1,10 @@
 package com.navinfo.volvo
 
 import android.os.Bundle
+import android.view.View
 import com.google.android.material.bottomnavigation.BottomNavigationView
 import androidx.appcompat.app.AppCompatActivity
+import androidx.navigation.Navigation
 import androidx.navigation.findNavController
 import androidx.navigation.ui.AppBarConfiguration
 import androidx.navigation.ui.setupActionBarWithNavController
@@ -27,10 +29,17 @@ class MainActivity : AppCompatActivity() {
         // menu should be considered as top level destinations.
         val appBarConfiguration = AppBarConfiguration(
             setOf(
-                R.id.navigation_home, R.id.navigation_dashboard, R.id.navigation_notifications
+                R.id.navigation_home,
+                R.id.navigation_dashboard,
+                R.id.navigation_notifications
             )
         )
         setupActionBarWithNavController(navController, appBarConfiguration)
         navView.setupWithNavController(navController)
+        findViewById<View>(R.id.fab_new_message).apply {
+            this.setOnClickListener {
+                navController.navigate(R.id.fab_new_message)
+            }
+        }
     }
 }

app/src/main/java/com/navinfo/volvo/ui/widget/SlideRecyclerView.kt

@@ -1,187 +0,0 @@
-package com.navinfo.volvo.ui.widget
-
-import android.annotation.SuppressLint
-import android.content.Context
-import android.graphics.Rect
-import android.util.AttributeSet
-import android.view.*
-import android.widget.Scroller
-import androidx.core.view.forEach
-import androidx.recyclerview.widget.RecyclerView
-import java.lang.Math.abs
-
-class SlideRecyclerView @JvmOverloads constructor(
-    context: Context,
-    attrs: AttributeSet? = null,
-    defStyleAttr: Int = 0
-) : RecyclerView(context, attrs, defStyleAttr) {
-    //系统最小移动距离
-    private val mTouchSlop = ViewConfiguration.get(context).scaledTouchSlop
-
-    //最小有效速度
-    private val mMinVelocity = 600
-
-    //增加手势控制，双击快速完成侧滑
-    private var isDoubleClick = false
-    private var mGestureDetector: GestureDetector =
-        GestureDetector(context, object : GestureDetector.SimpleOnGestureListener() {
-            override fun onDoubleTap(e: MotionEvent?): Boolean {
-                e?.let { event ->
-                    getSelectItem(event)
-                    mItem?.let {
-                        val deleteWith = it.getChildAt(it.childCount - 1).width
-                        //触发移动至完全展开deleteWidth
-                        if (it.scrollX == 0) {
-                            mScroller.startScroll(0, 0, deleteWith, 0)
-                        } else {
-                            mScroller.startScroll(it.scrollX, 0, -it.scrollX, 0)
-                        }
-                        isDoubleClick = true
-                        invalidate()
-                        return true
-                    }
-                }
-                //不进行拦截，只作为工具判断下双击
-                return false
-            }
-        })
-
-    //使用速度控制器，增加侧滑速度判定滑动成功，
-    //VelocityTracker 由native实现，需要及时释放内存
-    private var mVelocityTracker: VelocityTracker? = null
-
-    //流畅滑动
-    private var mScroller = Scroller(context)
-
-    //当前选中item
-    private var mItem: ViewGroup? = null
-
-    //上次按下的横坐标
-    private var mLastX = 0f
-
-    //当前RecyclerView被上层ViewGroup分发到事件，所有事件都会通过dispatchTouchEvent给到
-    override fun dispatchTouchEvent(ev: MotionEvent?): Boolean {
-        mGestureDetector.onTouchEvent(ev)
-        return super.dispatchTouchEvent(ev)
-    }
-
-    //viewGroup对子控件的事件拦截，一旦拦截，后续事件序列不会再调用onInterceptTouchEvent
-    override fun onInterceptTouchEvent(e: MotionEvent?): Boolean {
-        e?.let {
-            when (e.action) {
-                MotionEvent.ACTION_DOWN -> {
-                    getSelectItem(e)
-                    mLastX = e.x
-                }
-                MotionEvent.ACTION_MOVE -> {
-                    //移动控件
-                    return moveItem(e)
-                }
-//                MotionEvent.ACTION_UP -> {
-//                    stopMove(e)
-//                }
-            }
-        }
-        return super.onInterceptTouchEvent(e)
-    }
-
-    @SuppressLint("ClickableViewAccessibility")
-    override fun onTouchEvent(e: MotionEvent?): Boolean {
-        e?.let {
-            when (e.action) {
-                MotionEvent.ACTION_MOVE -> {
-                    moveItem(e)
-                    mLastX = e.x
-                }
-                MotionEvent.ACTION_UP -> {
-                    stopMove()
-                }
-            }
-        }
-        return super.onTouchEvent(e)
-    }
-
-    //活动结束
-    //判断一下结束的位置,补充或恢复位置
-    private fun stopMove() {
-        mItem?.let {
-            //如果移动过半，判定左划成功
-            val deleteWidth = it.getChildAt(it.childCount - 1).width
-            //如果整个移动过程速度大于600，也判定滑动成功
-            //注意如果没有拦截ACTION_MOVE,mVelocityTracker是没有初始化的
-            var velocity = 0f
-            mVelocityTracker?.let { tracker ->
-                tracker.computeCurrentVelocity(1000)
-                velocity = tracker.xVelocity
-            }
-            //判断结束情况，移动过半或者向左速度很快都展开
-            if ((abs(it.scrollX) >= deleteWidth / 2f) || (velocity < -mMinVelocity)) {
-                //触发移动至完全展开
-                mScroller.startScroll(it.scrollX, 0, deleteWidth - it.scrollX, 0)
-                invalidate()
-            } else {
-                //如果移动未过半应恢复状态
-                mScroller.startScroll(it.scrollX, 0, -it.scrollX, 0)
-                invalidate()
-            }
-        }
-        //清除状态
-        mLastX = 0f
-        //mVeloctityTracker由native实现，需要及时释放
-        mVelocityTracker?.apply {
-            clear()
-            recycle()
-        }
-        mVelocityTracker = null
-    }
-
-    //移动Item
-    //绝对值小于删除按钮长度随便移动，大于则不移动
-    @SuppressLint("Recycle")
-    private fun moveItem(e: MotionEvent): Boolean {
-        mItem?.let {
-            val dx = mLastX - e.x
-            //最小的移动距离应该舍弃，onInterceptTouchEvent不拦截，onTouchEvent内才更新mLastX
-//            if (abs(dx) > mTouchSlop) {
-                //检查mItem移动后应该在【-deleteLength，0】内
-                val deleteWith = it.getChildAt(it.childCount - 1).width
-                if ((it.scrollX + dx) <= deleteWith && (it.scrollX + dx) >= 0) {
-                    //触发移动
-                    it.scrollBy(dx.toInt(), 0)
-                    //触发速度计算
-                    //这里Rectycle不存在问题，一旦返回true，就会拦截事件，就会到达ACTION_UP去回收
-                    mVelocityTracker = mVelocityTracker ?: VelocityTracker.obtain()
-                    mVelocityTracker!!.addMovement(e)
-                    return true
-//                }
-            }
-
-
-        }
-        return false
-    }
-
-    //获取点击位置
-    //通过点击的y坐标除以Item高度得出
-    private fun getSelectItem(e: MotionEvent) {
-        val frame = Rect()
-        mItem = null
-        forEach {
-            if (it.visibility != GONE) {
-                it.getHitRect(frame)
-                if (frame.contains(e.x.toInt(), e.y.toInt())) {
-                    mItem = it as ViewGroup
-                }
-            }
-        }
-    }
-
-    //流畅地滑动
-    override fun computeScroll() {
-        if (mScroller.computeScrollOffset()) {
-            mItem?.scrollBy(mScroller.currX, mScroller.currY)
-            postInvalidate()
-        }
-    }
-}
-

app/src/main/res/drawable/ic_add_24dp.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#000000"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" android:pathData="M19,13h-6v6h-2v-6H5v-2h6V5h2v6h6v2z"/>
+</vector>

app/src/main/res/drawable/ic_baseline_person_24.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#000000"
+    android:viewportHeight="24" android:viewportWidth="24"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="@android:color/white" 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

@@ -3,8 +3,7 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/container"
     android:layout_width="match_parent"
-    android:layout_height="match_parent"
-   >
+    android:layout_height="match_parent">
 
     <com.google.android.material.bottomnavigation.BottomNavigationView
         android:id="@+id/nav_view"
@@ -13,6 +12,7 @@
         android:layout_marginStart="0dp"
         android:layout_marginEnd="0dp"
         android:background="?android:attr/windowBackground"
+        app:labelVisibilityMode="labeled"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintLeft_toLeftOf="parent"
         app:layout_constraintRight_toRightOf="parent"
@@ -30,4 +30,15 @@
         app:layout_constraintTop_toTopOf="parent"
         app:navGraph="@navigation/mobile_navigation" />
 
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
+        android:id="@+id/fab_new_message"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="10dp"
+        android:src="@drawable/ic_add_24dp"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:elevation="8dp"
+      />
 </androidx.constraintlayout.widget.ConstraintLayout>

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

@@ -5,15 +5,20 @@
         android:id="@+id/navigation_home"
         android:icon="@drawable/ic_home_black_24dp"
         android:title="@string/title_home" />
-
     <item
         android:id="@+id/navigation_dashboard"
         android:icon="@drawable/ic_dashboard_black_24dp"
         android:title="@string/title_dashboard" />
-
+    <item
+        android:id="@+id/navigation_none"
+        android:icon="@color/black"
+        android:title=" " />
     <item
         android:id="@+id/navigation_notifications"
         android:icon="@drawable/ic_notifications_black_24dp"
         android:title="@string/title_notifications" />
-
+    <item
+        android:id="@+id/navigation_my"
+        android:icon="@drawable/ic_baseline_person_24"
+        android:title="@string/my" />
 </menu>

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

@@ -9,7 +9,12 @@
         android:id="@+id/navigation_home"
         android:name="com.navinfo.volvo.ui.home.HomeFragment"
         android:label="@string/title_home"
-        tools:layout="@layout/fragment_home" />
+        tools:layout="@layout/fragment_home" >
+        <action
+            android:id="@+id/to_fab_new_message"
+            app:destination="@id/fab_new_message"
+            />
+    </fragment>
 
     <fragment
         android:id="@+id/navigation_dashboard"
@@ -17,6 +22,12 @@
         android:label="@string/title_dashboard"
         tools:layout="@layout/fragment_dashboard" />
 
+    <fragment
+        android:id="@+id/fab_new_message"
+        android:name="com.navinfo.volvo.ui.dashboard.DashboardFragment"
+        android:label="@string/title_dashboard"
+        tools:layout="@layout/fragment_dashboard" />
+
     <fragment
         android:id="@+id/navigation_notifications"
         android:name="com.navinfo.volvo.ui.notifications.NotificationsFragment"

app/src/main/res/values-zh-rCN/strings.xml

@@ -5,4 +5,5 @@
     <string name="title_notifications">Notifications</string>
     <string name="delete">删除</string>
     <string name="share">分享</string>
+    <string name="my">我的</string>
 </resources>

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

@@ -5,4 +5,5 @@
     <string name="title_notifications">Notifications</string>
     <string name="delete">Del</string>
     <string name="share">Share</string>
+    <string name="my">My</string>
 </resources>