Java tutorial
/* * MIT License * * Copyright (c) 2016 Alibaba Group * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.alibaba.android.layoutmanager.example; import com.alibaba.android.layoutmanager.DelegateAdapter; import com.alibaba.android.layoutmanager.LayoutHelper; import com.alibaba.android.layoutmanager.RecyclablePagerAdapter; import com.alibaba.android.layoutmanager.VirtualLayoutManager; import com.alibaba.android.layoutmanager.VirtualLayoutManager.LayoutParams; import com.alibaba.android.layoutmanager.layoutmanager.ColumnLayoutHelper; import com.alibaba.android.layoutmanager.layoutmanager.FixLayoutHelper; import com.alibaba.android.layoutmanager.layoutmanager.FloatLayoutHelper; import com.alibaba.android.layoutmanager.layoutmanager.GridLayoutHelper; import com.alibaba.android.layoutmanager.layoutmanager.LinearLayoutHelper; import com.alibaba.android.layoutmanager.layoutmanager.OnePlusNLayoutHelper; import com.alibaba.android.layoutmanager.layoutmanager.ScrollFixLayoutHelper; import com.alibaba.android.layoutmanager.layoutmanager.SingleLayoutHelper; import com.alibaba.android.layoutmanager.layoutmanager.StaggeredGridLayoutHelper; import com.alibaba.android.layoutmanager.layoutmanager.StickyLayoutHelper; import android.app.Activity; import android.content.Context; import android.graphics.Color; import android.graphics.Rect; import android.os.Bundle; import android.os.Handler; import android.os.Looper; import android.support.annotation.NonNull; import android.support.v4.view.ViewPager; import android.support.v7.widget.RecyclerView; import android.text.TextUtils; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.EditText; import android.widget.TextView; import java.util.LinkedList; import java.util.List; /** * @author villadora */ public class VLayoutActivity extends Activity { private static final boolean BANNER_LAYOUT = true; private static final boolean FIX_LAYOUT = true; private static final boolean LINEAR_LAYOUT = true; private static final boolean SINGLE_LAYOUT = true; private static final boolean FLOAT_LAYOUT = true; private static final boolean ONEN_LAYOUT = true; private static final boolean COLUMN_LAYOUT = true; private static final boolean GRID_LAYOUT = true; private static final boolean STICKY_LAYOUT = true; private static final boolean STAGGER_LAYOUT = true; private TextView mFirstText; private TextView mLastText; private TextView mCountText; private TextView mTotalOffsetText; private Runnable trigger; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main_activity); mFirstText = (TextView) findViewById(R.id.first); mLastText = (TextView) findViewById(R.id.last); mCountText = (TextView) findViewById(R.id.count); mTotalOffsetText = (TextView) findViewById(R.id.total_offset); final RecyclerView recyclerView = (RecyclerView) findViewById(R.id.main_view); findViewById(R.id.jump).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { EditText position = (EditText) findViewById(R.id.position); if (!TextUtils.isEmpty(position.getText())) { try { int pos = Integer.parseInt(position.getText().toString()); recyclerView.scrollToPosition(pos); } catch (Exception e) { Log.e("VlayoutActivity", e.getMessage(), e); } } else { recyclerView.requestLayout(); } } }); final VirtualLayoutManager layoutManager = new VirtualLayoutManager(this); recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() { @Override public void onScrollStateChanged(RecyclerView recyclerView, int scrollState) { } @Override public void onScrolled(RecyclerView recyclerView, int i, int i2) { mFirstText.setText("First: " + layoutManager.findFirstVisibleItemPosition()); mLastText.setText( "Existing: " + MainViewHolder.existing + " Created: " + MainViewHolder.createdTimes); mCountText.setText("Count: " + recyclerView.getChildCount()); mTotalOffsetText.setText("Total Offset: " + layoutManager.getOffsetToStart()); } }); recyclerView.setLayoutManager(layoutManager); // layoutManager.setReverseLayout(true); RecyclerView.ItemDecoration itemDecoration = new RecyclerView.ItemDecoration() { public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) { int position = ((LayoutParams) view.getLayoutParams()).getViewPosition(); outRect.set(4, 4, 4, 4); } }; final RecyclerView.RecycledViewPool viewPool = new RecyclerView.RecycledViewPool(); recyclerView.setRecycledViewPool(viewPool); // recyclerView.addItemDecoration(itemDecoration); viewPool.setMaxRecycledViews(0, 20); final DelegateAdapter delegateAdapter = new DelegateAdapter(layoutManager, true); recyclerView.setAdapter(delegateAdapter); final List<DelegateAdapter.Adapter> adapters = new LinkedList<>(); if (BANNER_LAYOUT) { adapters.add(new SubAdapter(this, new LinearLayoutHelper(), 1) { @Override public void onViewRecycled(MainViewHolder holder) { if (holder.itemView instanceof ViewPager) { ((ViewPager) holder.itemView).setAdapter(null); } } @Override public MainViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { if (viewType == 1) return new MainViewHolder(LayoutInflater.from(VLayoutActivity.this) .inflate(R.layout.view_pager, parent, false)); return super.onCreateViewHolder(parent, viewType); } @Override public int getItemViewType(int position) { return 1; } @Override protected void onBindViewHolderWithOffset(MainViewHolder holder, int position, int offsetTotal) { } @Override public void onBindViewHolder(MainViewHolder holder, int position) { if (holder.itemView instanceof ViewPager) { ViewPager viewPager = (ViewPager) holder.itemView; viewPager.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 200)); // from position to get adapter viewPager.setAdapter(new PagerAdapter(this, viewPool)); } } }); } // { // GridLayoutHelper helper = new GridLayoutHelper(10); // helper.setAspectRatio(4f); // helper.setGap(10); // adapters.add(new SubAdapter(this, helper, 80)); // } if (FLOAT_LAYOUT) { FloatLayoutHelper layoutHelper = new FloatLayoutHelper(); layoutHelper.setAlignType(FixLayoutHelper.BOTTOM_RIGHT); layoutHelper.setDefaultLocation(100, 400); LayoutParams layoutParams = new LayoutParams(150, 150); adapters.add(new SubAdapter(this, layoutHelper, 1, layoutParams)); } if (LINEAR_LAYOUT) { LinearLayoutHelper layoutHelper1 = new LinearLayoutHelper(); layoutHelper1.setAspectRatio(2.0f); LinearLayoutHelper layoutHelper2 = new LinearLayoutHelper(); layoutHelper2.setAspectRatio(4.0f); layoutHelper2.setDividerHeight(10); layoutHelper2.setMargin(10, 30, 10, 10); layoutHelper2.setPadding(10, 30, 10, 10); layoutHelper2.setBgColor(0xFFF5A623); adapters.add(new SubAdapter(this, layoutHelper1, 1)); adapters.add(new SubAdapter(this, layoutHelper2, 6) { @Override public void onBindViewHolder(MainViewHolder holder, int position) { if (position % 2 == 0) { LayoutParams layoutParams = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 300); layoutParams.mAspectRatio = 5; holder.itemView.setLayoutParams(layoutParams); } } }); } if (STICKY_LAYOUT) { StickyLayoutHelper layoutHelper = new StickyLayoutHelper(); layoutHelper.setOffset(100); layoutHelper.setAspectRatio(4); adapters.add(new SubAdapter(this, layoutHelper, 1, new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 100))); } if (SINGLE_LAYOUT) { SingleLayoutHelper layoutHelper = new SingleLayoutHelper(); layoutHelper.setBgColor(Color.rgb(135, 225, 90)); layoutHelper.setAspectRatio(4); layoutHelper.setMargin(10, 20, 10, 20); layoutHelper.setPadding(10, 10, 10, 10); adapters.add(new SubAdapter(this, layoutHelper, 1, new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 100))); } if (COLUMN_LAYOUT) { ColumnLayoutHelper layoutHelper = new ColumnLayoutHelper(); layoutHelper.setBgColor(0xff00f0f0); layoutHelper.setWeights(new float[] { 40.0f, Float.NaN, 40 }); adapters.add(new SubAdapter(this, layoutHelper, 5) { @Override public void onBindViewHolder(MainViewHolder holder, int position) { if (position == 0) { LayoutParams layoutParams = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 300); layoutParams.mAspectRatio = 4; holder.itemView.setLayoutParams(layoutParams); } else { LayoutParams layoutParams = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 300); layoutParams.mAspectRatio = Float.NaN; holder.itemView.setLayoutParams(layoutParams); } } }); } if (ONEN_LAYOUT) { OnePlusNLayoutHelper helper = new OnePlusNLayoutHelper(); helper.setBgColor(0xff876384); helper.setAspectRatio(4.0f); helper.setColWeights(new float[] { 40f, 45f }); helper.setMargin(10, 20, 10, 20); helper.setPadding(10, 10, 10, 10); adapters.add(new SubAdapter(this, helper, 2)); } if (ONEN_LAYOUT) { OnePlusNLayoutHelper helper = new OnePlusNLayoutHelper(); helper.setBgColor(0xffef8ba3); helper.setAspectRatio(2.0f); helper.setColWeights(new float[] { 40f }); helper.setRowWeight(30f); helper.setMargin(10, 20, 10, 20); helper.setPadding(10, 10, 10, 10); adapters.add(new SubAdapter(this, helper, 4) { @Override public void onBindViewHolder(MainViewHolder holder, int position) { super.onBindViewHolder(holder, position); LayoutParams lp = (LayoutParams) holder.itemView.getLayoutParams(); if (position == 0) { lp.rightMargin = 1; } else if (position == 1) { } else if (position == 2) { lp.topMargin = 1; lp.rightMargin = 1; } } }); } if (ONEN_LAYOUT) { adapters.add(new SubAdapter(this, new OnePlusNLayoutHelper(), 0)); OnePlusNLayoutHelper helper = new OnePlusNLayoutHelper(); helper.setBgColor(0xff87e543); helper.setAspectRatio(1.8f); helper.setColWeights(new float[] { 33.33f, 50f, 40f }); helper.setMargin(10, 20, 10, 20); helper.setPadding(10, 10, 10, 10); LayoutParams lp = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT); adapters.add(new SubAdapter(this, helper, 3, lp) { @Override public void onBindViewHolder(MainViewHolder holder, int position) { super.onBindViewHolder(holder, position); LayoutParams lp = (LayoutParams) holder.itemView.getLayoutParams(); if (position == 0) { lp.rightMargin = 1; } } }); } if (COLUMN_LAYOUT) { adapters.add(new SubAdapter(this, new ColumnLayoutHelper(), 0)); adapters.add(new SubAdapter(this, new ColumnLayoutHelper(), 4)); } if (FIX_LAYOUT) { FixLayoutHelper layoutHelper = new FixLayoutHelper(10, 10); adapters.add(new SubAdapter(this, layoutHelper, 0)); layoutHelper = new FixLayoutHelper(FixLayoutHelper.TOP_RIGHT, 20, 20); adapters.add(new SubAdapter(this, layoutHelper, 1) { @Override public void onBindViewHolder(MainViewHolder holder, int position) { super.onBindViewHolder(holder, position); LayoutParams layoutParams = new LayoutParams(200, 200); holder.itemView.setLayoutParams(layoutParams); } }); } if (STICKY_LAYOUT) { StickyLayoutHelper layoutHelper = new StickyLayoutHelper(false); adapters.add(new SubAdapter(this, layoutHelper, 0)); layoutHelper = new StickyLayoutHelper(false); layoutHelper.setOffset(100); adapters.add(new SubAdapter(this, layoutHelper, 1, new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 100))); } if (GRID_LAYOUT) { GridLayoutHelper layoutHelper = new GridLayoutHelper(2); layoutHelper.setMargin(7, 0, 7, 0); layoutHelper.setWeights(new float[] { 46.665f }); layoutHelper.setHGap(3); adapters.add(new SubAdapter(this, layoutHelper, 2)); layoutHelper = new GridLayoutHelper(4); layoutHelper.setWeights(new float[] { 20f, 26.665f }); layoutHelper.setMargin(7, 0, 7, 0); layoutHelper.setHGap(3); adapters.add(new SubAdapter(this, layoutHelper, 8)); } if (GRID_LAYOUT) { adapters.add(new SubAdapter(this, new GridLayoutHelper(4), 0)); GridLayoutHelper helper = new GridLayoutHelper(4); helper.setAspectRatio(4f); //helper.setColWeights(new float[]{40, 20, 30, 30}); // helper.setMargin(0, 10, 0, 10); helper.setGap(10); adapters.add(new SubAdapter(this, helper, 80) { @Override public void onBindViewHolder(MainViewHolder holder, int position) { super.onBindViewHolder(holder, position); LayoutParams lp = (LayoutParams) holder.itemView.getLayoutParams(); // lp.bottomMargin = 1; // lp.rightMargin = 1; } }); } if (FIX_LAYOUT) { adapters.add(new SubAdapter(this, new ScrollFixLayoutHelper(20, 20), 1) { @Override public void onBindViewHolder(MainViewHolder holder, int position) { super.onBindViewHolder(holder, position); LayoutParams layoutParams = new LayoutParams(200, 200); holder.itemView.setLayoutParams(layoutParams); } }); } if (LINEAR_LAYOUT) adapters.add(new SubAdapter(this, new LinearLayoutHelper(), 10)); if (GRID_LAYOUT) { GridLayoutHelper helper = new GridLayoutHelper(3); helper.setMargin(0, 10, 0, 10); adapters.add(new SubAdapter(this, helper, 3)); } if (STAGGER_LAYOUT) { // adapters.add(new SubAdapter(this, new StaggeredGridLayoutHelper(2, 0), 0)); final StaggeredGridLayoutHelper helper = new StaggeredGridLayoutHelper(2, 10); helper.setMargin(20, 10, 10, 10); helper.setPadding(10, 10, 20, 10); helper.setBgColor(0xFF86345A); adapters.add(new SubAdapter(this, helper, 27) { @Override public void onBindViewHolder(MainViewHolder holder, int position) { super.onBindViewHolder(holder, position); LayoutParams layoutParams = new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 200); if (position % 2 == 0) { layoutParams.mAspectRatio = 1.0f; } else { layoutParams.height = 340 + position % 7 * 20; } holder.itemView.setLayoutParams(layoutParams); } }); } if (COLUMN_LAYOUT) { // adapters.add(new SubAdapter(this, new ColumnLayoutHelper(), 3)); } if (GRID_LAYOUT) { // adapters.add(new SubAdapter(this, new GridLayoutHelper(4), 24)); } delegateAdapter.setAdapters(adapters); final Handler mainHandler = new Handler(Looper.getMainLooper()); trigger = new Runnable() { @Override public void run() { // recyclerView.scrollToPosition(22); // recyclerView.getAdapter().notifyDataSetChanged(); // mainHandler.postDelayed(trigger, 1000); //List<DelegateAdapter.Adapter> newAdapters = new ArrayList<>(); //newAdapters.add((new SubAdapter(VLayoutActivity.this, new ColumnLayoutHelper(), 3))); //newAdapters.add((new SubAdapter(VLayoutActivity.this, new GridLayoutHelper(4), 24))); //delegateAdapter.addAdapters(newAdapters); recyclerView.requestLayout(); } }; mainHandler.postDelayed(trigger, 1000); } // RecyclableViewPager static class PagerAdapter extends RecyclablePagerAdapter<MainViewHolder> { public PagerAdapter(SubAdapter adapter, RecyclerView.RecycledViewPool pool) { super(adapter, pool); } @Override public int getCount() { return 6; } @Override public void onBindViewHolder(MainViewHolder viewHolder, int position) { // only vertical viewHolder.itemView.setLayoutParams( new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT)); ((TextView) viewHolder.itemView.findViewById(R.id.title)).setText("Banner: " + position); } @Override public int getItemViewType(int position) { return 0; } } static class SubAdapter extends DelegateAdapter.Adapter<MainViewHolder> { private Context mContext; private LayoutHelper mLayoutHelper; private LayoutParams mLayoutParams; private int mCount = 0; public SubAdapter(Context context, LayoutHelper layoutHelper, int count) { this(context, layoutHelper, count, new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 300)); } public SubAdapter(Context context, LayoutHelper layoutHelper, int count, @NonNull LayoutParams layoutParams) { this.mContext = context; this.mLayoutHelper = layoutHelper; this.mCount = count; this.mLayoutParams = layoutParams; } @Override public LayoutHelper onCreateLayoutHelper() { return mLayoutHelper; } @Override public MainViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { return new MainViewHolder(LayoutInflater.from(mContext).inflate(R.layout.item, parent, false)); } @Override public void onBindViewHolder(MainViewHolder holder, int position) { // only vertical holder.itemView.setLayoutParams(new LayoutParams(mLayoutParams)); } @Override protected void onBindViewHolderWithOffset(MainViewHolder holder, int position, int offsetTotal) { ((TextView) holder.itemView.findViewById(R.id.title)).setText(Integer.toString(offsetTotal)); } @Override public int getItemCount() { return mCount; } } static class MainViewHolder extends RecyclerView.ViewHolder { public static volatile int existing = 0; public static int createdTimes = 0; public MainViewHolder(View itemView) { super(itemView); createdTimes++; existing++; } @Override protected void finalize() throws Throwable { existing--; super.finalize(); } } }