标签：android des style blog http color
New Widgets：提供了两个新的控件
这两个控件包含在了Android L的support library中，
他们可以用于显示复杂的布局而且都默认采用了Material的风格。
RecyclerView是更高级的Listview。他对包含在其中的item view做了优化，
可以实现在滚动的时候，回收在利用item view。其实这个功能就是listview中的
viewholder。
RecyclerView有如下两个特点：
RecyclerView.ItemAnimator（定义动画的时候需要继承这个类）
在使用RecyclerView的时候，还需要提供以下两个变量：
创建一个布局，然后添加一个RecyclerView和添加ListView一样
<!-- A RecyclerView with some commonly used attributes --> <android.support.v7.widget.RecyclerView android:id="@+id/my_recycler_view" android:scrollbars="vertical" android:layout_width="match_parent" android:layout_height="match_parent"/>
定义一个Activity
public class MyActivity extends Activity { private RecyclerView mRecyclerView; private RecyclerView.Adapter mAdapter; private RecyclerView.LayoutManager mLayoutManager; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.my_activity); mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view); // improve performance if you know that changes in content // do not change the size of the RecyclerView mRecyclerView.setHasFixedSize(true); // use a linear layout manager mLayoutManager = new LinearLayoutManager(this); mRecyclerView.setLayoutManager(mLayoutManager); // specify an adapter (see also next example) mAdapter = new MyAdapter(myDataset); mRecyclerView.setAdapter(mAdapter); } ... }
创建一个简单的适配器
public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> { private String[] mDataset; // Provide a reference to the type of views that you are using // (custom viewholder) public static class ViewHolder extends RecyclerView.ViewHolder { public TextView mTextView; public ViewHolder(TextView v) { super(v); mTextView = v; } } // Provide a suitable constructor (depends on the kind of dataset) public MyAdapter(String[] myDataset) { mDataset = myDataset; } // Create new views (invoked by the layout manager) @Override public MyAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { // create a new view View v = LayoutInflater.from(parent.getContext()) .inflate(R.layout.my_text_view, null); // set the view‘s size, margins, paddings and layout parameters ... ViewHolder vh = new ViewHolder(v); return vh; } // Replace the contents of a view (invoked by the layout manager) @Override public void onBindViewHolder(ViewHolder holder, int position) { // - get element from your dataset at this position // - replace the contents of the view with that element holder.mTextView.setText(mDataset[position]); } // Return the size of your dataset (invoked by the layout manager) @Override public int getItemCount() { return mDataset.length; } }
CardView继承自FrameLayout，这个控件能够让你能用卡牌的方式来展示信息，
能够使所有的APP有统一的风格。这个控件能设置阴影和圆角。
CardView特别的属性如下：
使用方式：
<!-- A CardView that contains a TextView --> <android.support.v7.widget.CardView xmlns:card_view="http://schemas.android.com/apk/res-auto" android:id="@+id/card_view" android:layout_gravity="center" android:layout_width="200dp" android:layout_height="200dp" card_view:cardCornerRadius="4dp"> <TextView android:id="@+id/info_text" android:layout_width="match_parent" android:layout_height="match_parent" /> </android.support.v7.widget.CardView>
Material design之New Widgets（RecyclerView CardView）,布布扣,bubuko.com
Material design之New Widgets（RecyclerView CardView）
标签：android des style blog http color
原文地址：http://www.cnblogs.com/qinghuaideren/p/3838146.html
