Android 踩坑日记 - RecyclerView 布局问题
作者：互联网
Android 踩坑日记（05/05/20） - RecyclerView
Overview
今天来写一篇Android RecyclerView的踩坑日记，这个非常的特别，那么我们现在来看看这是个啥问题把。
问题在什么地方
看图！
可以看到这个非常尴尬的问题就是要消失的item会划出界面。**
看看需要啥样的
这个就是我们所需要的效果。
问题所在
是不是都以为是Recyclerview 适配器或者属性问题，但是我研究了一波，发现不是。
这样显示看看代码：
package com.example.wanandroidapp_master.adpater.RecyclerView;
import android.content.Context;
import android.graphics.Color;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import com.example.wanandroidapp_master.R;
import com.example.wanandroidapp_master.model.entity.ArticleEntity;
import java.util.List;
/**
* Date 4/29/2020
* Author CaoJiaHao
* Description ${Description}
**/
public class HomePage_RecyclerViewAdapter extends RecyclerView.Adapter<HomePage_RecyclerViewAdapter.ViewHolder> {
private Context mContext;
private List<ArticleEntity.articleInfo> mData;
private TextView txtTitle;
private TextView txtAuthor;
private LinearLayout linearLayout;
public HomePage_RecyclerViewAdapter(Context mContext, List<ArticleEntity.articleInfo> mData) {
this.mContext = mContext;
this.mData = mData;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
ViewHolder viewHolder = new ViewHolder(LayoutInflater.from(mContext).inflate(R.layout.recommended_article_layout, parent, false));
return viewHolder;
}
@Override
public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
txtTitle.setText(mData.get(position).getTitle());
txtTitle.setTag(mData.get(position).getLink());
txtAuthor.setText("作者：" + mData.get(position).getAuthor() + mData.get(position).getShareUser());
linearLayout.removeAllViews();
LinearLayout.LayoutParams lp = new
LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
lp.setMargins(6, 0, 0, 0);
for (ArticleEntity.tags tag : mData.get(position).getTags()) {
TextView txtTag = new TextView(mContext);
txtTag.setBackground(mContext.getResources().getDrawable(R.drawable.article_tag_background));
txtTag.setText(tag.getName());
txtTag.setTextSize(10f);
txtTag.setLayoutParams(lp);
txtTag.setTextColor(Color.WHITE);
linearLayout.addView(txtTag);
}
}
@Override
public int getItemCount() {
return mData.size();
}
@Override
public int getItemViewType(int position) {
return position;
}
@Override
public long getItemId(int position) {
return super.getItemId(position);
}
public class ViewHolder extends RecyclerView.ViewHolder {
public ViewHolder(View itemView) {
super(itemView);
txtTitle = itemView.findViewById(R.id.recommendedArticle_txtArticleName);
txtAuthor = itemView.findViewById(R.id.recommendedArticle_txtAuthor);
linearLayout = itemView.findViewById(R.id.recommendedArticle_LinearLayout);
}
}
}
这个就是适配器的代码。
没有问题
所以就是布局问题了。。。
看看问题代码：
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/white"
android:clipChildren="false"
android:orientation="vertical">
<com.lany.banner.BannerView
android:id="@+id/homePage_BannerView"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
app:banner_delayTime="5000"
app:banner_indicatorGravity="center"
app:banner_indicatorMargin="4dp"
app:banner_indicatorType="circle_indicator_title_inside"
app:banner_isAutoPlay="true"
app:banner_scaleType="fitXY"
app:banner_scrollTime="1000"
app:banner_titleBackground="#50000000"
app:banner_titleTextColor="#ffffff"
app:banner_titleTextSize="12sp"
app:layout_constraintBottom_toTopOf="@+id/guideline3"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/homePage_RecyclerView"
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="@+id/homePage_BannerView"
app:layout_constraintTop_toTopOf="@+id/guideline3" />
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.25" />
</androidx.constraintlayout.widget.ConstraintLayout>
问题代码！
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/white"
android:clipChildren="false"
android:orientation="vertical">
<com.lany.banner.BannerView
android:id="@+id/homePage_BannerView"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
app:banner_delayTime="5000"
app:banner_indicatorGravity="center"
app:banner_indicatorMargin="4dp"
app:banner_indicatorType="circle_indicator_title_inside"
app:banner_isAutoPlay="true"
app:banner_scaleType="fitXY"
app:banner_scrollTime="1000"
app:banner_titleBackground="#50000000"
app:banner_titleTextColor="#ffffff"
app:banner_titleTextSize="12sp"
app:layout_constraintBottom_toTopOf="@+id/guideline3"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline3">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/homePage_RecyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
<androidx.constraintlayout.widget.Guideline
android:id="@+id/guideline3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
app:layout_constraintGuide_percent="0.25" />
</androidx.constraintlayout.widget.ConstraintLayout>
正确代码！
解决方法
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="@+id/guideline3">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/homePage_RecyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
就是我在外面添加了一个LinearLayout...
这样Recyclerview的父容器就是那个LinearLauout了。而且他们的大小相同，所以就解决了。
写这个是因为我遇到问题百度了一个多小时，就是找不到解决方法。于是就自己解决了一下，顺便发了个博客帮助下同样的小伙伴，要是觉得可以，点个关注哦~
标签：mData,ViewHolder,LinearLayout,public,position,import,Android,RecyclerView,日记 来源： https://www.cnblogs.com/cao-1/p/12833455.html