RecyclerView滑動圖片加文字
阿新 • • 發佈:2018-12-12
1.開啟app/build.gradle檔案,在dependencies閉包中新增如下內容:
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
testCompile 'junit:junit:4.12'
**compile 'com.android.support:recyclerview-v7:24.2.1'**
compile 'com.android.support:appcompat-v7:24.2.1'
}
新增完後,要記得Sync Now來進行同步。
然後修改main_activity.xml程式碼:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.gyq.recyclerviewtest.MainActivity"> <android.support.v7.widget.RecyclerView android:id="@+id/recycler_view" android:layout_width="match_parent" android:layout_height="match_parent"> </android.support.v7.widget.RecyclerView> </LinearLayout>
2,準備fruit_item.xml佈局,實現左右滑動效果:
3,為RecyclerView準備一個介面卡:
package com.gyq.recyclerviewtest.adapter; import android.support.v7.widget.RecyclerView; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast; import com.gyq.recyclerviewtest.R; import com.gyq.recyclerviewtest.bean.Fruit; import java.util.List; /** * ${DESC} * author: gyq * create at 2016/12/12 18:51 */ public class FruitAdapter extends RecyclerView.Adapter<FruitAdapter.ViewHolder> { private List<Fruit> mFruitList; static class ViewHolder extends RecyclerView.ViewHolder { // View fruitView; ImageView fruitImage; TextView fruitName; public ViewHolder(View itemView) { super(itemView); //fruitView = itemView; fruitImage = (ImageView)itemView.findViewById(R.id.iv_item_icon); fruitName = (TextView)itemView.findViewById(R.id.tv_item_name); } } public FruitAdapter(List<Fruit> fruitInfo) { mFruitList = fruitInfo; } @Override public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view = LayoutInflater.from(parent.getContext()) .inflate(R.layout.fruit_item,parent,false); ViewHolder holder = new ViewHolder(view); return holder; } @Override public void onBindViewHolder(ViewHolder holder, int position) { Fruit fruit = mFruitList.get(position); holder.fruitImage.setImageResource(fruit.getImageId()); holder.fruitName.setText(fruit.getName()); } @Override public int getItemCount() { return mFruitList.size(); } }
解釋一下上面程式碼:首先定義了一個內部類ViewHolder,其繼承RecyclerView.ViewHolder。然後ViewHolder的建構函式中需要傳入一個view引數;
4,介面卡準備好了,接下來我們就來使用RecyclerView:
package com.gyq.recyclerviewtest;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import com.gyq.recyclerviewtest.adapter.FruitAdapter;
import com.gyq.recyclerviewtest.bean.Fruit;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
public class MainActivity extends AppCompatActivity {
private List<Fruit> fruitInfo = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initFruit();
RecyclerView recyclerView = (RecyclerView)findViewById(R.id.recycler_view);
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
//設定水平滾動
layoutManager.setOrientation(LinearLayoutManager.HORIZONTAL);
recyclerView.setLayoutManager(layoutManager);
FruitAdapter adapter = new FruitAdapter(fruitInfo);
recyclerView.setAdapter(adapter);
}
private void initFruit() {
for (int i = 0; i < 2;i++) {
Fruit apple = new Fruit("apple",R.drawable.apple);
fruitInfo.add(apple);
Fruit apricot = new Fruit("apricot"),R.drawable.apricot);
fruitInfo.add(apricot);
Fruit banana = new Fruit("banana"),R.drawable.banana);
fruitInfo.add(banana);
Fruit cherry = new Fruit("cherry"),R.drawable.cherry);
fruitInfo.add(cherry);
Fruit kiwi = new Fruit("kiwi"),R.drawable.kiwi);
fruitInfo.add(kiwi);
Fruit lemon = new Fruit("lemon"),R.drawable.lemon);
fruitInfo.add(lemon);
Fruit mango = new Fruit("mango"),R.drawable.mango);
fruitInfo.add(mango);
Fruit orange = new Fruit("orange"),R.drawable.orange);
fruitInfo.add(orange);
Fruit peach = new Fruit("peach"),R.drawable.peach);
fruitInfo.add(peach);
Fruit pear = new Fruit("pear"),R.drawable.pear);
fruitInfo.add(pear);
Fruit strawberry = new Fruit("strawberry"),R.drawable.strawberry);
fruitInfo.add(strawberry);
Fruit tomato = new Fruit("tomato"),R.drawable.tomato);
fruitInfo.add(tomato);
}
}
}
5,還有一個bean類
package com.gyq.recyclerviewtest.bean;
/**
* ${DESC}
* author: gyq
* create at 2016/12/12 17:02
*/
public class Fruit {
private String name;
private int ImageId;
public Fruit(String name, int imageId) {
this.name = name;
this.ImageId = imageId;
}
public String getName() {
return name;
}
public int getImageId() {
return ImageId;
}
}