标签：title font cal 内容 line bind print i++ get
恩，学习Fragment的过程中的一个小实践居然用到了RecycleView！坑了我好久有木有！！好气哦，从昨晚到现在。（现在也还是一头雾水，不过照搬也会用了）
这是第一版的代码，都写在 MainActivity.java 里了。
1 public class MainActivity extends AppCompatActivity { 2 3 private RecyclerView rv; 4 private ArrayList<String> datas = new ArrayList<String>(); 5 6 @Override 7 protected void onCreate(Bundle savedInstanceState) { 8 super.onCreate(savedInstanceState); 9 10 rv = new RecyclerView(this); 11 12 createData(datas); 13 14 setContentView(rv); 15 16 rv.setLayoutManager(new LinearLayoutManager(this)); 17 18 rv.setAdapter(new RecyclerView.Adapter() { 19 20 //重写你想要的RecyclerView中的每一项所含有的内容 21 class myViewHolder extends RecyclerView.ViewHolder { 22 private TextView tv; 23 24 public myViewHolder(TextView itemView) { 25 super(itemView); 26 tv = itemView; 27 tv.setTextSize(28); 28 } 29 30 public TextView getTv() { 31 return tv; 32 } 33 } 34 35 //创建RecycleView中每一项的内容 36 @Override 37 public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 38 return new myViewHolder(new TextView(parent.getContext())); 39 } 40 41 //创建的的每一项与布局绑定并设置数据 42 @Override 43 public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { 44 ((myViewHolder)holder).getTv().setText(datas.get(position)); 45 } 46 47 //获取RecycleView的长度 48 @Override 49 public int getItemCount() { 50 System.out.println("--------------------------------------->"+datas.size()); 51 return datas.size(); 52 } 53 }); 54 } 55 56 public void createData(ArrayList<String> data) { 57 58 for(char i=‘A‘;i<=‘Z‘;i++) 59 { 60 data.add(String.valueOf(i)); 61 } 62 } 63 64 }
接下里是升级后的，把Adapter单独提出来写,也是最重要的部分！MyAdapter.java
1 package com.liwenchi.learnrv; 2 3 import android.support.v7.widget.RecyclerView; 4 import android.view.LayoutInflater; 5 import android.view.View; 6 import android.view.ViewGroup; 7 import android.widget.TextView; 8 9 /** 10 * Created by VULCAN on 2017/7/26. 11 */ 12 class MyAdapter extends RecyclerView.Adapter { 13 14 private CellData[] data = new CellData[]{new CellData("为什么Django框架仍然统治着Python开发世界","因为它真的很厉害"),new CellData("用Python分析购物篮","一种有用的技术成为关联分析...")}; 15 16 //重写你想要的RecyclerView中的每一项所含有的内容 17 class myViewHolder extends RecyclerView.ViewHolder { 18 private View root; 19 private TextView tvTitle; 20 private TextView tvContent; 21 22 public myViewHolder(View root) { 23 super(root); 24 25 tvTitle = (TextView) root.findViewById(R.id.tvTitle); 26 tvContent = (TextView) root.findViewById(R.id.tvContent); 27 } 28 29 public TextView getTvTitle() { 30 return tvTitle; 31 } 32 33 public TextView getTvContent() { 34 return tvContent; 35 } 36 } 37 38 //创建RecycleView中每一项的内容 39 @Override 40 public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 41 //创建一个布局解释器 42 return new myViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.list_cell, null)); 43 } 44 45 //创建的的每一项与布局绑定并设置数据 46 @Override 47 public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { 48 ((myViewHolder) holder).getTvTitle().setText(data[position].title); 49 ((myViewHolder) holder).getTvContent().setText(data[position].content); 50 } 51 52 //获取RecycleView的长度 53 @Override 54 public int getItemCount() { 55 return data.length; 56 } 57 }
MainActivity.java
1 package com.liwenchi.learnrv; 2 3 import android.support.v7.app.AppCompatActivity; 4 import android.os.Bundle; 5 import android.support.v7.widget.LinearLayoutManager; 6 import android.support.v7.widget.RecyclerView; 7 8 import java.util.ArrayList; 9 public class MainActivity extends AppCompatActivity { 10 11 private RecyclerView rv; 12 13 private ArrayList<String> datas = new ArrayList<String>(); 14 15 @Override 16 protected void onCreate(Bundle savedInstanceState) { 17 super.onCreate(savedInstanceState); 18 19 rv = new RecyclerView(this); 20 21 createData(datas); 22 23 setContentView(rv); 24 25 rv.setLayoutManager(new LinearLayoutManager(this)); 26 27 rv.setAdapter(new MyAdapter()); 28 } 29 30 public void createData(ArrayList<String> data) { 31 32 for(char i=‘A‘;i<=‘Z‘;i++) 33 { 34 data.add(String.valueOf(i)); 35 } 36 } 37 }
CellData.java
1 public class CellData { 2 3 public CellData(String title, String content) { 4 this.title = title; 5 this.content = content; 6 } 7 8 String title = "title"; 9 String content = "Content"; 10 11 }
list_cell.xml
1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 3 android:orientation="vertical" 4 android:layout_width="match_parent" 5 android:layout_height="match_parent"> 6 7 <TextView 8 android:id="@+id/tvTitle" 9 android:layout_width="match_parent" 10 android:layout_height="wrap_content" 11 android:textAppearance="?android:attr/textAppearance" 12 android:text="标题" /> 13 14 <TextView 15 android:id="@+id/tvContent" 16 android:layout_width="match_parent" 17 android:layout_height="wrap_content" 18 android:text="内容" /> 19 </LinearLayout>
[2017-7-26]Android Learning Day4
标签：title font cal 内容 line bind print i++ get
原文地址：http://www.cnblogs.com/liwenchi/p/7240189.html
