RecyclerView萬能適配器
效果如下
一、框架引入
先在項目的 build.gradle(Project:XXXX) 的 repositories 添加:
allprojects {
repositories {
...
maven { url "https://jitpack.io" }
}
}
然後在Module的 build.gradle(Module:app) 的 dependencies 添加:
dependencies {
......
compile 'com.github.CymChad:BaseRecyclerViewAdapterHelper:2.9.22'
}
注意： 一旦出現加載失敗的情況，只有兩種情況:
一是：配置沒配置好
配置沒配置好，有幾種情況：
- 只配置了 dependencies
- 配置 repositories，但是位置錯了，build.gradle(Project:XXXX) 文件下的repositories有兩個，一個是buildscript下面的，一個是allprojects下面的，要配置到allprojects下面纔是對的。
- 版本號前面多一個v，這個是我的鍋，在2.1.2版本之前都是帶v的，之後（包含2.1.2）都不需要帶v。
二是：網絡原因
第一步：在佈局文件中引入RecyclerView
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".base.Main4Activity">
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
第二步：編寫條目佈局文件
item_rv.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="5dp">
<ImageView
android:id="@+id/iv_img"
android:layout_width="150dp"
android:layout_height="80dp" />
<TextView
android:id="@+id/tv_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:layout_toRightOf="@+id/iv_img"
android:text="我是標題"
android:textColor="#f00"
android:textSize="20sp" />
<TextView
android:id="@+id/tv_content"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/tv_title"
android:layout_marginLeft="15dp"
android:layout_marginTop="10dp"
android:layout_toRightOf="@id/iv_img"
android:text="我是描述" />
</RelativeLayout>
第三步：編寫數據實體類型
Model.java
package com.example.myrecyclelistview.base;
public class Model {
private String title;
private String content;
private String imgUrl;
public Model() {
}
public Model(String title, String content, String imgUrl) {
this.title = title;
this.content = content;
this.imgUrl = imgUrl;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public String getImgUrl() {
return imgUrl;
}
public void setImgUrl(String imgUrl) {
this.imgUrl = imgUrl;
}
}
第四步：編寫適配器
MyAdapter.java
package com.example.myrecyclelistview.base;
import android.support.annotation.LayoutRes;
import android.support.annotation.Nullable;
import com.chad.library.adapter.base.BaseQuickAdapter;
import com.chad.library.adapter.base.BaseViewHolder;
import com.example.myrecyclelistview.R;
import java.util.List;
public class MyAdapter_M4 extends BaseQuickAdapter<Model> {
public MyAdapter_M4(@LayoutRes int layoutResId, @Nullable List<Model> data) {
super(layoutResId, data);
}
@Override
protected void convert(BaseViewHolder helper, Model item) {
//可鏈式調用賦值
helper.setText(R.id.tv_title, item.getTitle())
.setText(R.id.tv_content, item.getContent())
.setImageResource(R.id.iv_img, R.mipmap.ic_launcher);
//獲取當前條目position
//int position = helper.getLayoutPosition();
}
}
最後一步：在Activity中使用該適配器
MainActivity.java
package com.example.myrecyclelistview.base;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.Toast;
import com.chad.library.adapter.base.BaseQuickAdapter;
import com.example.myrecyclelistview.MainActivity;
import com.example.myrecyclelistview.MyAdapter;
import com.example.myrecyclelistview.R;
import java.util.ArrayList;
import java.util.List;
public class Main4Activity extends AppCompatActivity {
private RecyclerView recyclerView;
private List<Model> datas;
private MyAdapter_M4 adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main4);
//初始化RecyclerView
recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
//模擬的數據（實際開發中一般是從網絡獲取的）
datas = new ArrayList<>();
Model model;
for (int i = 0; i < 15; i++) {
model = new Model();
model.setTitle("我是第" + i + "條標題");
model.setContent("第" + i + "條內容");
datas.add(model);
}
//創建佈局管理
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
recyclerView.setLayoutManager(layoutManager);
//創建適配器
adapter = new MyAdapter_M4(R.layout.item_rv, datas);
//給RecyclerView設置適配器
recyclerView.setAdapter(adapter);
/**
* 該適配器提供了5種動畫效果（漸顯、縮放、從下到上，從左到右、從右到左）
* public static final int ALPHAIN = 0x00000001;
* public static final int SCALEIN = 0x00000002;
* public static final int SLIDEIN_BOTTOM = 0x00000003;
* public static final int SLIDEIN_LEFT = 0x00000004;
* public static final int SLIDEIN_RIGHT = 0x00000005;
*/
//開啓動畫（默認爲漸顯效果）
adapter.openLoadAnimation();
/**
* 使用縮放動畫
* 更換動畫效果
*/
// adapter.openLoadAnimation(BaseQuickAdapter.SCALEIN);
//條目點擊事件
adapter.setOnRecyclerViewItemClickListener(new BaseQuickAdapter.OnRecyclerViewItemClickListener() {
@Override
public void onItemClick(View view, int i) {
Toast.makeText(Main4Activity.this, "點擊了第" + (i + 1) + "條條目", Toast.LENGTH_SHORT).show();
}
});
//條目長按事件
adapter.setOnRecyclerViewItemLongClickListener(new BaseQuickAdapter.OnRecyclerViewItemLongClickListener() {
@Override
public boolean onItemLongClick(View view, int i) {
Toast.makeText(Main4Activity.this, "長按了第" + (i + 1) + "條條目", Toast.LENGTH_SHORT).show();
return true;
}
});
}
}