Question

我正在为我的RecylerView使用Groupie库（版本2.1.0）。在我的原始应用程序中，该视图将完全不可见。我决定制作一个虚拟应用程序来解决我的问题，但是我无法使视图可见。我觉得解决方案可能很简单，因为该库易于使用。

MainActivity.kt：

package com.dmelton.test

import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import com.xwray.groupie.GroupAdapter
import com.xwray.groupie.Item
import com.xwray.groupie.ViewHolder
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val adapter = GroupAdapter<ViewHolder>()

        adapter.add(Test())
        adapter.add(Test())
        adapter.add(Test())

        new_recyclerView.adapter = adapter
    }
}

class Test: Item<ViewHolder>() {

    override fun bind(viewHolder: ViewHolder, position: Int) {
        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
    }

    override fun getLayout(): Int {
        return R.layout.individual_service
    }

}

activity_main.xml：

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".MainActivity">


    <android.support.v7.widget.RecyclerView
            android:layout_width="395dp"
            android:layout_height="715dp"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintEnd_toEndOf="parent" android:id="@+id/new_recyclerView"/>
</android.support.constraint.ConstraintLayout>

individual_service.xml：

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
                                             android:layout_width="match_parent"
                                             android:layout_height="wrap_content"
                                             xmlns:app="http://schemas.android.com/apk/res-auto">

    <ImageView
            android:id="@+id/imageView_service"
            android:layout_width="60dp"
            android:layout_height="60dp"
            android:layout_marginStart="16dp"
            android:layout_marginTop="8dp"
            android:layout_marginBottom="8dp"
            android:background="@android:color/holo_blue_dark"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            app:srcCompat="@android:drawable/ic_menu_preferences" />

    <TextView
            android:id="@+id/textView_service_name"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="16dp"
            android:layout_marginBottom="8dp"
            android:text="Service Name"
            android:textColor="@android:color/black"
            android:textSize="16sp"
            android:textStyle="bold"
            app:layout_constraintBottom_toBottomOf="@+id/imageView_service"
            app:layout_constraintStart_toEndOf="@+id/imageView_service"
            app:layout_constraintTop_toTopOf="@+id/imageView_service" />


    <TextView
            android:id="@+id/textView_service_status"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginStart="8dp"
            android:layout_marginEnd="8dp"
            android:layout_marginBottom="8dp"
            android:text="Status"
            android:textColor="@android:color/black"
            android:textSize="16sp"
            android:textStyle="bold"
            app:layout_constraintBottom_toBottomOf="@+id/imageView_service"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@+id/textView_service_name"
            app:layout_constraintTop_toTopOf="@+id/imageView_service" />

</android.support.constraint.ConstraintLayout>

build.gradle（应用程序）

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 28
    defaultConfig {
        applicationId "com.dmelton.test"
        minSdkVersion 19
        targetSdkVersion 28
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation 'com.android.support:appcompat-v7:28.0.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    implementation 'com.xwray:groupie:2.1.0'
    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.android.support:recyclerview-v7:28.0.0'
}

Answer 1

我知道了。我忘了在我的RecyclerView xml块中添加布局管理器： app:layoutManager="android.support.v7.widget.LinearLayoutManager"

Answer 2

您需要在您的布局文件中添加以下内容： root@beaglebone:~# ifconfig eth0 Link encap:Ethernet HWaddr 98:84:e3:b8:ad:e3 inet6 addr: fe80::9a84:e3ff:feb8:ade3/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:149 errors:0 dropped:0 overruns:0 frame:0 TX packets:53 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:19926 (19.4 KiB) TX bytes:12317 (12.0 KiB) Interrupt:40 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:157 errors:0 dropped:0 overruns:0 frame:0 TX packets:157 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:16592 (16.2 KiB) TX bytes:16592 (16.2 KiB) usb0 Link encap:Ethernet HWaddr 98:84:e3:b8:ad:e0 inet addr:192.168.7.2 Bcast:192.168.7.255 Mask:255.255.255.0 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) 另外您还需要添加

RecyclerView在Groupie（Kotlin）中不可见

2 个答案: