RecyclerView-FastScroll
介绍:
RecyclerView的快速滚动,支持使用了LinearLayoutManager和GridLayoutManager的垂直RecyclerViews。
运行效果:
使用说明:
样式大致基于最新Lollipop版本的ListView FastScroller。大量借鉴了 Google的Launcher3 FastScroller。
你必须把FastScrollRecyclerView作为你的base RecyclerView。
如果你的RecyclerView Adapter实现了SectionIndexer,FastScrollPopup将显示从那个实现返回的text。
/*
* Copyright (c) 2016 Tim Malseed
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.simplecity.recyclerview_fastscroll.sample.activity;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.SectionIndexer;
import android.widget.TextView;
import com.simplecity.recyclerview_fastscroll.sample.R;
import com.simplecity.recyclerview_fastscroll.views.FastScrollRecyclerView;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FastScrollRecyclerView recyclerView = (FastScrollRecyclerView) findViewById(R.id.recycler);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setAdapter(new RecyclerAdapter());
}
private class RecyclerAdapter extends RecyclerView.Adapter
implements SectionIndexer
{
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
TextView textView = new TextView(MainActivity.this);
textView.setPadding(100, 100, 100, 100);
return new ViewHolder(textView);
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
((TextView) holder.itemView).setText(String.format("Item %d", position));
}
@Override
public int getItemCount() {
return 20;
}
@Override
public Object\[\] getSections() {
Object\[\] objects = new Object\[getItemCount()\];
for (int i = 0, length = getItemCount(); i < length; i++) {
objects\[i\] = i;
}
return objects;
}
@Override
public int getPositionForSection(int sectionIndex) {
return sectionIndex;
}
@Override
public int getSectionForPosition(int position) {
return position;
}
}
private class ViewHolder extends RecyclerView.ViewHolder {
public ViewHolder(View itemView) {
super(itemView);
}
}
}
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