Android RecyclerView And CardView _recyclerview

笛里谁知壮士心，沙头空照征人骨。这篇文章主要讲述Android RecyclerView And CardView相关的知识，希望能为你提供帮助。
Google I/O 2014大会公布android L系统,还有Material Design全新的设计风格 .而Material Design卡片式的设计.Google Play应用商店和G+ APP已经变成这样的卡片式的风格 .为了配合Material Design, Google特意在SDK中加入了RecyclerView 和 CardView,只是它加入在Support-V7库中,可能是为了兼容旧版本号吧.Google官方已经说明确怎么用了,这里: https://developer.android.com/preview/material/get-started.html, 只是还不够完整.

以下就看看怎么使用RecyclerView 及 CardView展示卡片式的ListView.思路和ListView一模一样. 我使用的是Android Studio,用Eclipse的朋友...赶紧转到Android Studio来吧.

1, SDK更新到最新.API 20 及Build Tool 20.0.0
2,新建一个普通的project,API Level> =15.

文章图片

3,build.gradle中引入Support-V7.

dependencies { compile ' com.android.support:recyclerview-v7:+' compile ' com.android.support:cardview-v7:+' }

假设仅仅这样写会出现下面的错误:
Error:Execution failed for task ‘:app:processDebugManifest‘.
> Manifest merger failed : uses-sdk:minSdkVersion 15 cannot be smaller than version L declared in library com.android.support:recyclerview-v7:21.0.0-rc1
这是由于导入了v7的21.0.0rc1,可是这个不支持API 15.有一个Hack的解决的方法:在AndroidManifest.xml文件里写入:

< manifest xmlns:android=" http://schemas.android.com/apk/res/android" xmlns:tools=" http://schemas.android.com/tools" package=" robam.org.ltest" > < uses-sdk tools:node=" replace" /> < /manifest>

点击同步button,这时候就把V7的recyclerview和cardview导入了project.
4, 接下来,Activity的布局文件,相当于ListView :

< android.support.v7.widget.RecyclerView android:id=" @+id/my_recycler_view" android:layout_width=" match_parent" android:layout_height=" match_parent" android:scrollbars=" vertical" />

5,在接下来,写Item的布局文件, Item布局根节点是CardView,这样就会有卡片式的阴影效果.

< ?xml version=" 1.0" encoding=" utf-8" ?> < android.support.v7.widget.CardView 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" android:layout_marginLeft=" 16dp" android:layout_marginRight=" 16dp" android:layout_marginTop=" 4dp" android:layout_marginBottom=" 4dp" app:cardCornerRadius=" 3dp" > < TextView android:id=" @+id/text" android:layout_width=" match_parent" android:layout_height=" wrap_content" android:paddingLeft=" ?
android:listPreferredItemPaddingLeft" android:paddingRight=" ?android:listPreferredItemPaddingRight" android:paddingTop=" 16dp" android:paddingBottom=" 16dp" android:textColor=" @android:color/holo_blue_light" tools:text=" Item" /> < /android.support.v7.widget.CardView>

6, 到写Activity的时候了.例如以下:

public class MainActivity extends Activity {public static final List< String> data; static { data = https://www.songbingjia.com/android/new ArrayList< String> (); data.add(" 浮夸 - 陈奕迅" ); data.add(" 好久不见 - 陈奕迅" ); data.add(" 时间都去哪儿了 - 王铮亮" ); data.add(" 董小姐 - 宋冬野" ); data.add(" 爱如潮水 - 张信哲" ); data.add(" 给我一首歌的时间 - 周杰伦" ); data.add(" 天黑黑 - 孙燕姿" ); data.add(" 可惜不是你 - 梁静茹" ); data.add(" 太委屈 - 陶晶莹" ); data.add(" 用心良苦 - 张宇" ); data.add(" 说谎 - 林宥嘉" ); data.add(" 独家记忆 - 陈小春" ); }LinearLayoutManager layoutManager; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // Get RecyclerView RecyclerView recyclerView = (RecyclerView) findViewById(R.id.my_recycler_view); recyclerView.setHasFixedSize(true); layoutManager = new LinearLayoutManager(this); recyclerView.setLayoutManager(layoutManager); recyclerView.setAdapter(new MyAdapter(data)); }@Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.main, menu); return true; }@Override public boolean onOptionsItemSelected(MenuItem item) { return super.onOptionsItemSelected(item); }private static class MyAdapter extends RecyclerView.Adapter< MyAdapter.ViewHolder> { private List< String> data; public MyAdapter(List< String> data) { this.data = data; }@Override public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) { // 载入Item的布局.布局中用到的真正的CardView. View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item_robam_l, viewGroup, false); // ViewHolder參数一定要是Item的Root节点. return new ViewHolder(view); }@Override public void onBindViewHolder(ViewHolder viewHolder, int i) { viewHolder.text.setText(data.get(i)); }@Override public int getItemCount() { return data.size(); }static class ViewHolder extends RecyclerView.ViewHolder { TextView text; public ViewHolder(View itemView) { // super这个參数一定要注意,必须为Item的根节点.否则会出现莫名的FC. super(itemView); text = (TextView) itemView.findViewById(R.id.text); } } } }

【Android RecyclerView And CardView】
完毕之后的效果就和ListView一模一样了.

文章图片

上面的源码戳这里:http://pan.baidu.com/s/1mgoN8uc
这个样例參考自: https://github.com/evant/recyclerview-sample/tree/master
另附上一篇英文教程: http://antonioleiva.com/recyclerview/

事实上早有国外的大牛写了一个开源库已经实现了这样的效果,并且还有非常多Card的效果.慢慢探索吧.
https://github.com/gabrielemariotti/cardslib