如果想给RecyclerView增加头布局的话，
首先：导包
compile 'com.bartoszlipinski.recyclerviewheader:library:
1.2.0'
compile 'com.android.support:recyclerview-v7:
25.1.0'
在设置了适配器以后，
RecyclerViewHeader header = (RecyclerViewHeader) findViewById(R.
id.rch);
header.attachTo(mRecyclerView,
true);
在布局文件中：
<android.support.v7.widget.RecyclerView
android:layout_below=
"@id/rl"
android:
id=
"@+id/rv_list"
android:layout_width=
"match_parent"
android:layout_height=
"match_parent"/>
<com.bartoszlipinski.recyclerviewheader.RecyclerViewHeader
android:
id=
"@+id/rch"
android:layout_width=
"match_parent"
android:layout_height=
"100dp">
<ImageView
android:background=
"#ff00"
android:
id=
"@+id/headimg1"
android:layout_width=
"match_parent"
android:layout_height=
"match_parent" />
</com.bartoszlipinski.recyclerviewheader.RecyclerViewHeader>
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