Android控件RecyclerView實(shí)現(xiàn)混排效果仿網(wǎng)易云音樂(lè)

更新時(shí)間：2017年10月30日 09:31:46 作者：Hensen_

這篇文章主要為大家詳細(xì)介紹了Android控件RecyclerView實(shí)現(xiàn)混排效果，仿網(wǎng)易云音樂(lè)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

前言

最近在使用網(wǎng)易云音樂(lè)的時(shí)候，看到如下圖的排版效果圖，自己也想實(shí)現(xiàn)一個(gè)

這里采用網(wǎng)上用法最多的方式，而且是比較簡(jiǎn)單的方式實(shí)現(xiàn)的，想要做項(xiàng)目的同學(xué)也可以快速入手搞定首頁(yè)界面，可以在最快的時(shí)間內(nèi)模仿出來(lái)，且效果達(dá)到90%以上的相似

效果演示

至于圖片的加載你們可以根據(jù)網(wǎng)上的Api獲取相應(yīng)的圖片加載到對(duì)應(yīng)的位置，這里只是采用本地圖片來(lái)演示

這里寫圖片描述

實(shí)現(xiàn)分析

這里是采用RecyclerView的GridLayoutManager的一個(gè)SpanSize這么一個(gè)東西，從下圖很容易知道其意思

這里寫圖片描述

項(xiàng)目結(jié)構(gòu)

項(xiàng)目結(jié)構(gòu)可能對(duì)初學(xué)者感覺(jué)很龐大，不用擔(dān)心，這里我會(huì)按照下面的包名劃分，從最簡(jiǎn)單的開(kāi)始分析

這里寫圖片描述

引入依賴

首先是在Gradle中引入對(duì)RecyclerView的依賴

compile 'com.android.support:recyclerview-v7:25.3.1'

View包

由于項(xiàng)目用到的圖片是有規(guī)格限定的，所以需要對(duì)ImageView覆寫，得到我們想要尺寸的圖片

SquareImageView：正方形圖片
RectImageView：長(zhǎng)方形圖片

public class SquareImageView extends android.support.v7.widget.AppCompatImageView {

  public SquareImageView(Context context) {
    this(context,null);
  }

  public SquareImageView(Context context, @Nullable AttributeSet attrs) {
    this(context, attrs,0);
  }

  public SquareImageView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);

    setScaleType(ScaleType.FIT_XY);
  }

  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, widthMeasureSpec);
  }
}

public class RectImageView extends android.support.v7.widget.AppCompatImageView {

  public RectImageView(Context context) {
    this(context, null);
  }

  public RectImageView(Context context, @Nullable AttributeSet attrs) {
    this(context, attrs, 0);
  }

  public RectImageView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);

    setScaleType(ScaleType.FIT_XY);
  }

  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    int widthMode = MeasureSpec.getMode(widthMeasureSpec);
    int width = MeasureSpec.getSize(widthMeasureSpec);
    // 設(shè)置大小為寬度的三分之二
    int halfWidthMeasureSpec = MeasureSpec.makeMeasureSpec(width / 3 * 2, widthMode);
    super.onMeasure(widthMeasureSpec, halfWidthMeasureSpec);
  }
}

Music包

這里是我們存儲(chǔ)實(shí)體的地方，其中四種類型的劃分，分別對(duì)應(yīng)項(xiàng)目展示中的前三個(gè)模塊的劃分，其中還有一個(gè)標(biāo)題也算是一種類型，所以共四種

public class Music {

  public int type;
  public String title;
  // 后期可加入Glide加載網(wǎng)絡(luò)圖片Url
  public int imageId;

  public interface TYPE {
    int TYPE_GRID_THREE = 0x01;
    int TYPE_GRID_TWO = 0x02;
    int TYPE_LIST = 0x03;
    int TYPE_TITLE = 0x04;
  }
}

Listener包

由于RecyclerView自身是沒(méi)有點(diǎn)擊事件的，所以這個(gè)包是RecyclerView的點(diǎn)擊事件接口

public interface OnItemClickListener {
  void OnItemClick(int position);
}

Decoration包

由于RecyclerView是不提供分割線的，所以這個(gè)包是自定義的分割線

public class SpacesItemDecoration extends RecyclerView.ItemDecoration {

  private int space;

  public SpacesItemDecoration(int space) {
    this.space = space;
  }

  @Override
  public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
    outRect.left = space;
    outRect.right = space;
    outRect.bottom = space;
    outRect.top = space;
  }
}

ViewHolder

這里存儲(chǔ)的是我們混排效果的控件，標(biāo)題可能會(huì)有點(diǎn)區(qū)別，其他是一樣的效果，為了后期方便拓展，我們就把他們分開(kāi)，不代碼復(fù)用

public class GridThreeViewHolder extends RecyclerView.ViewHolder {

  public SquareImageView iv_icon;
  public TextView tv_content;

  public GridThreeViewHolder(View itemView) {
    super(itemView);
    iv_icon = (SquareImageView) itemView.findViewById(R.id.iv_icon);
    tv_content = (TextView) itemView.findViewById(R.id.tv_content);
  }
}

public class GridTwoViewHolder extends RecyclerView.ViewHolder {

  public RectImageView iv_icon;
  public TextView tv_content;

  public GridTwoViewHolder(View itemView) {
    super(itemView);
    iv_icon = (RectImageView) itemView.findViewById(R.id.iv_icon);
    tv_content = (TextView) itemView.findViewById(R.id.tv_content);
  }
}

public class ListViewHolder extends RecyclerView.ViewHolder {

  public RectImageView iv_icon;
  public TextView tv_content;

  public ListViewHolder(View itemView) {
    super(itemView);
    iv_icon = (RectImageView) itemView.findViewById(R.id.iv_icon);
    tv_content = (TextView) itemView.findViewById(R.id.tv_content);
  }
}

public class TitleViewHolder extends RecyclerView.ViewHolder {

  public TextView tv_content;

  public TitleViewHolder(View itemView) {
    super(itemView);
    tv_content = (TextView) itemView.findViewById(R.id.tv_content);
  }
}

Adapter包

這里就是對(duì)所有ViewHolder的控制器，然而這里并不是混排效果實(shí)現(xiàn)的最終地方，只不過(guò)是填充數(shù)據(jù)的地方

public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> implements View.OnClickListener {

  private List<Music> mList;
  private Context mContext;
  private LayoutInflater mInflater;

  /**
   * 點(diǎn)擊事件
   */
  private OnItemClickListener mOnItemClickListener;

  public void setOnItemClickListener(OnItemClickListener onItemClickListener) {
    this.mOnItemClickListener = onItemClickListener;
  }

  public RecyclerAdapter(Context context, List<Music> list) {
    this.mList = list;
    this.mContext = context;
    this.mInflater = LayoutInflater.from(context);
  }

  @Override
  public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view;
    RecyclerView.ViewHolder mViewHolder = null;
    if (viewType == Music.TYPE.TYPE_GRID_THREE) {
      view = mInflater.inflate(R.layout.item_grid_three, parent, false);
      mViewHolder = new GridThreeViewHolder(view);
    } else if (viewType == Music.TYPE.TYPE_GRID_TWO) {
      view = mInflater.inflate(R.layout.item_grid_two, parent, false);
      mViewHolder = new GridTwoViewHolder(view);
    } else if (viewType == Music.TYPE.TYPE_LIST) {
      view = mInflater.inflate(R.layout.item_list, parent, false);
      mViewHolder = new ListViewHolder(view);
    } else if (viewType == Music.TYPE.TYPE_TITLE) {
      view = mInflater.inflate(R.layout.item_title, parent, false);
      mViewHolder = new TitleViewHolder(view);
    }
    return mViewHolder;
  }

  @Override
  public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
    switch (getItemViewType(position)) {
      case Music.TYPE.TYPE_GRID_THREE:
        GridThreeViewHolder gHolder_three = (GridThreeViewHolder) holder;
        gHolder_three.tv_content.setText(mList.get(position).title);
        gHolder_three.iv_icon.setImageResource(mList.get(position).imageId);
        //點(diǎn)擊事件
        gHolder_three.itemView.setOnClickListener(this);
        gHolder_three.itemView.setTag(position);
        break;
      case Music.TYPE.TYPE_GRID_TWO:
        GridTwoViewHolder gHolder_two = (GridTwoViewHolder) holder;
        gHolder_two.tv_content.setText(mList.get(position).title);
        gHolder_two.iv_icon.setImageResource(mList.get(position).imageId);
        //點(diǎn)擊事件
        gHolder_two.itemView.setOnClickListener(this);
        gHolder_two.itemView.setTag(position);
        break;
      case Music.TYPE.TYPE_LIST:
        ListViewHolder lHolder = (ListViewHolder) holder;
        lHolder.tv_content.setText(mList.get(position).title);
        lHolder.iv_icon.setImageResource(mList.get(position).imageId);
        //點(diǎn)擊事件
        lHolder.itemView.setOnClickListener(this);
        lHolder.itemView.setTag(position);
        break;
      case Music.TYPE.TYPE_TITLE:
        TitleViewHolder tHolder = (TitleViewHolder) holder;
        tHolder.tv_content.setText(mList.get(position).title);
        //點(diǎn)擊事件
        tHolder.itemView.setOnClickListener(this);
        tHolder.itemView.setTag(position);
        break;
    }
  }

  @Override
  public int getItemViewType(int position) {
    return mList.get(position).type;
  }

  @Override
  public int getItemCount() {
    return mList.size();
  }

  @Override
  public void onClick(View v) {
    if (mOnItemClickListener != null) {
      int position = (int) v.getTag();
      mOnItemClickListener.OnItemClick(position);
    }
  }
}

Activity

這里就是我們實(shí)現(xiàn)混排效果的關(guān)鍵，我們會(huì)根據(jù)不同類型的數(shù)據(jù)，對(duì)RecyclerView的SpanSize的進(jìn)行設(shè)置

public class MainActivity extends AppCompatActivity implements OnItemClickListener {

  private RecyclerView ry;
  private GridLayoutManager layoutManager;
  private RecyclerAdapter mAdapter;
  private static List<Music> mList;

  /**
   * 模擬本地?cái)?shù)據(jù)
   */
  static {
    mList = new ArrayList<>();

    for (int i = 0; i < 1; i++) {
      Music music = new Music();
      music.type = Music.TYPE.TYPE_TITLE;
      music.imageId = R.drawable.ic_cover;
      music.title = "推薦歌單";
      mList.add(music);
    }

    for (int i = 0; i < 6; i++) {
      Music music = new Music();
      music.type = Music.TYPE.TYPE_GRID_THREE;
      music.imageId = R.drawable.ic_cover;
      music.title = "先不要降溫！我沒(méi)錢買衣服";
      mList.add(music);
    }

    for (int i = 0; i < 1; i++) {
      Music music = new Music();
      music.type = Music.TYPE.TYPE_TITLE;
      music.imageId = R.drawable.ic_cover;
      music.title = "推薦MV";
      mList.add(music);
    }

    for (int i = 0; i < 4; i++) {
      Music music = new Music();
      music.type = Music.TYPE.TYPE_GRID_TWO;
      music.imageId = R.drawable.ic_cover;
      music.title = "Perfect Day";
      mList.add(music);
    }

    for (int i = 0; i < 1; i++) {
      Music music = new Music();
      music.type = Music.TYPE.TYPE_TITLE;
      music.imageId = R.drawable.ic_cover;
      music.title = "精選專欄";
      mList.add(music);
    }

    for (int i = 0; i < 3; i++) {
      Music music = new Music();
      music.type = Music.TYPE.TYPE_LIST;
      music.imageId = R.drawable.ic_cover;
      music.title = "去看《銀翼殺手2049》前，你應(yīng)該知道的三件事";
      mList.add(music);
    }

    for (int i = 0; i < 1; i++) {
      Music music = new Music();
      music.type = Music.TYPE.TYPE_TITLE;
      music.imageId = R.drawable.ic_cover;
      music.title = "最新音樂(lè)";
      mList.add(music);
    }

    for (int i = 0; i < 6; i++) {
      Music music = new Music();
      music.type = Music.TYPE.TYPE_GRID_THREE;
      music.imageId = R.drawable.ic_cover;
      music.title = "[BGM]一定聽(tīng)過(guò)的神級(jí)背景配樂(lè)";
      mList.add(music);
    }
  }

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    ry = (RecyclerView) findViewById(R.id.ry);
    layoutManager = new GridLayoutManager(this, 6);
    layoutManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {
      @Override
      public int getSpanSize(int position) {
        int type = mList.get(position).type;
        if (type == Music.TYPE.TYPE_GRID_THREE) {
          return 2;
        } else if (type == Music.TYPE.TYPE_GRID_TWO) {
          return 3;
        } else if (type == Music.TYPE.TYPE_LIST) {
          return 6;
        } else if (type == Music.TYPE.TYPE_TITLE) {
          return 6;
        }
        return 0;
      }
    });
    ry.setLayoutManager(layoutManager);
    ry.addItemDecoration(new SpacesItemDecoration(2));

    // 填充數(shù)據(jù)
    mAdapter = new RecyclerAdapter(this, mList);
    mAdapter.setOnItemClickListener(this);
    ry.setAdapter(mAdapter);

  }

  @Override
  public void OnItemClick(int position) {
    String title = mList.get(position).title;
    Toast.makeText(this, title, Toast.LENGTH_SHORT).show();
  }
}

layout布局文件

這里的布局很簡(jiǎn)單，比如用到我們的正方形圖片，長(zhǎng)方形圖片等，這里就不做代碼貼出，詳細(xì)可以查看源碼

源碼下載

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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