RecyclerView 案例

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RecyclerView基本使用Demo

MainActivity

  1. public class MainActivity extends ListActivity {
  3. 	protected void onCreate(Bundle savedInstanceState) {
  4. 		super.onCreate(savedInstanceState);
  5. 		String[] array = {"基础，点击下试试",
  6. 				"添加",
  7. 				"删除",
  8. 				"ListView",
  9. 				"横向的GridView",
  10. 				"横向瀑布流",
  11. 				"纵向瀑布流",
  12. 				"分割线 ItemDecoration",
  13. 				"BaseRecyclerViewAdapterHelper基本使用"};
  14. 		setListAdapter(new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, new ArrayList<>(Arrays.asList(array))));
  15. 	}
  17. 	@Override
  18. 	protected void onListItemClick(ListView l, View v, int position, long id) {
  19. 		if (position <= 6) {
  20. 			Intent intent = new Intent(this, RecyclerViewActivity.class);
  21. 			intent.putExtra("type", position);
  22. 			startActivity(intent);
  23. 		} else if (position == 7) {
  24. 			startActivity(new Intent(this, RV_ItemDecorationActivity.class));
  25. 		} else if (position == 8) {
  26. 			startActivity(new Intent(this, BRVAHActivity.class));
  27. 		}
  28. 	}
  29. }

RecyclerViewActivity

  1. public class RecyclerViewActivity extends Activity implements MyOnItemClickLitener {
  3. 	private RecyclerView mRecyclerView;
  4. 	private MyRecyclerViewAdapter mRecyclerViewAdapter;
  6. 	@Override
  7. 	protected void onCreate(Bundle savedInstanceState) {
  8. 		super.onCreate(savedInstanceState);
  9. 		setContentView(R.layout.activity_main);
  10. 		mRecyclerView = (RecyclerView) findViewById(R.id.rv);
  11. 		init();
  12. 	}
  13. 	
  14. 	protected void init() {
  15. 		List<String> mDatas = new ArrayList<String>();
  16. 		for (int i = ‘A‘; i < ‘z‘; i++) {
  17. 			mDatas.add("" + (char) i);
  18. 		}
  19. 		mRecyclerViewAdapter = new MyRecyclerViewAdapter(this, mDatas);
  20. 		mRecyclerViewAdapter.setOnItemClickLitener(this);
  21. 		mRecyclerViewAdapter.setMargins(5);//addItemDecoration一会单独拿出来说
  23. 		mRecyclerView.setAdapter(mRecyclerViewAdapter);//设置adapter
  24. 		mRecyclerView.setLayoutManager(new GridLayoutManager(this, 3));//设置布局管理器
  25. 		mRecyclerView.setItemAnimator(new DefaultItemAnimator());//设置Item增加、移除动画
  26. 	}
  28. 	@Override
  29. 	public void onItemClick(View view, int position) {
  30. 		Toast.makeText(this, position + " 被点击了", Toast.LENGTH_SHORT).show();
  31. 		reInit(position);
  32. 	}
  33. 	
  34. 	@Override
  35. 	public void onItemLongClick(View view, int position) {
  36. 		Toast.makeText(this, position + "被长按了", Toast.LENGTH_SHORT).show();
  37. 	}
  39. 	private void reInit(int position) {
  40. 		int type = getIntent().getIntExtra("type", 0);
  41. 		switch (type) {
  42. 			case 0:
  43. 				mRecyclerView.addItemDecoration(new DividerItemDecoration(this, DividerItemDecoration.VERTICAL));//添加间隔线
  44. 				mRecyclerView.addItemDecoration(new DividerItemDecoration(this, DividerItemDecoration.HORIZONTAL));//添加间隔线
  45. 				break;
  46. 			case 1:
  47. 				mRecyclerViewAdapter.addDataAt(position, "添加一条数据\nposition=" + position);
  48. 				mRecyclerView.scrollToPosition(position);
  49. 				break;
  50. 			case 2:
  51. 				mRecyclerViewAdapter.removeDataAt(position);
  52. 				mRecyclerView.scrollToPosition(position);//删除最后一条数据时也不会报错
  53. 				break;
  54. 			case 3:
  55. 				mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
  56. 				break;
  57. 			case 4:
  58. 				mRecyclerView.setLayoutManager(new GridLayoutManager(this, 4, GridLayoutManager.HORIZONTAL, false));//横向的GridView
  59. 				break;
  60. 			case 5://Staggered：错列的，叉排的
  61. 				mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(1 + new Random().nextInt(8), StaggeredGridLayoutManager.HORIZONTAL));//行
  62. 				mRecyclerViewAdapter.setRandomWidth(true);
  63. 				break;
  64. 			case 6:
  65. 				mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(1 + new Random().nextInt(5), StaggeredGridLayoutManager.VERTICAL));//列
  66. 				mRecyclerViewAdapter.setRandomHeight(true);
  67. 				break;
  68. 		}
  69. 	}
  70. }

MyRecyclerViewAdapter

  1. public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.MyViewHolder> {
  2. 	private Context context;
  3. 	private List<String> mDatas;
  4. 	private MyOnItemClickLitener mOnItemClickLitener;
  6. 	private int margins = 0;
  7. 	private boolean randomWidth = false;
  8. 	private boolean randomHeight = false;
  10. 	public MyRecyclerViewAdapter(Context context, List<String> mDatas) {
  11. 		this.context = context;
  12. 		this.mDatas = mDatas;
  13. 	}
  15. 	@Override
  16. 	public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
  17. 		return new MyViewHolder(LayoutInflater.from(context).inflate(R.layout.item, parent, false));
  18. 	}
  20. 	@Override
  21. 	public void onBindViewHolder(final MyViewHolder holder, int position) {
  22. 		holder.tv.setText(mDatas.get(position));
  23. 		RecyclerView.LayoutParams lp = (RecyclerView.LayoutParams) holder.tv.getLayoutParams();
  24. 		lp.setMargins(margins, margins, margins, margins);//设置边距，这里完全可以放在RecyclerView的addItemDecoration方法中
  26. 		//横向时，item的宽度需要设置；纵向时，item的高度需要设置
  27. 		if (randomHeight) lp.height = 200 + new Random().nextInt(5) * 100;//**************************************************唯一的区别在这
  28. 		if (randomWidth) lp.width = 200 + new Random().nextInt(5) * 100;//***************************************************唯一的区别在这
  30. 		holder.tv.setLayoutParams(lp);
  32. 		// 如果设置了回调，则设置点击事件
  33. 		holder.itemView.setOnClickListener(new OnClickListener() {
  34. 			@Override
  35. 			public void onClick(View v) {
  36. 				if (mOnItemClickLitener != null) mOnItemClickLitener.onItemClick(holder.itemView, holder.getAdapterPosition());
  37. 			}
  38. 		});
  39. 		holder.itemView.setOnLongClickListener(new OnLongClickListener() {
  40. 			@Override
  41. 			public boolean onLongClick(View v) {
  42. 				if (mOnItemClickLitener != null) mOnItemClickLitener.onItemLongClick(holder.itemView, holder.getAdapterPosition());
  43. 				return false;
  44. 			}
  45. 		});
  46. 	}
  48. 	@Override
  49. 	public int getItemCount() {
  50. 		return mDatas.size();
  51. 	}
  53. 	/**
  54. 	 * 添加并更新数据，同时具有动画效果
  55. 	 */
  56. 	public void addDataAt(int position, String data) {
  57. 		mDatas.add(position, data);
  58. 		notifyItemInserted(position);//更新数据集，注意如果用adapter.notifyDataSetChanged()将没有动画效果
  59. 	}
  61. 	/**
  62. 	 * 移除并更新数据，同时具有动画效果
  63. 	 */
  64. 	public void removeDataAt(int position) {
  65. 		mDatas.remove(position);
  66. 		notifyItemRemoved(position);
  67. 	}
  69. 	public void setOnItemClickLitener(MyOnItemClickLitener mOnItemClickLitener) {
  70. 		this.mOnItemClickLitener = mOnItemClickLitener;
  71. 	}
  73. 	public void setMargins(int margins) {
  74. 		this.margins = margins;
  75. 	}
  77. 	public void setRandomWidth(boolean randomWidth) {
  78. 		this.randomWidth = randomWidth;
  79. 	}
  81. 	public void setRandomHeight(boolean randomHeight) {
  82. 		this.randomHeight = randomHeight;
  83. 	}
  85. 	class MyViewHolder extends RecyclerView.ViewHolder {
  86. 		TextView tv;
  88. 		public MyViewHolder(View view) {
  89. 			super(view);
  90. 			tv = (TextView) view.findViewById(R.id.id_num);
  91. 		}
  92. 	}
  93. }

MyOnItemClickLitener

  1. /**系统没有提供ClickListener和LongClickListener，我们自己通过接口回调处理 */
  2. public interface MyOnItemClickLitener {
  3. 	void onItemClick(View view, int position);
  5. 	void onItemLongClick(View view, int position);
  6. }

RV_ItemDecorationActivity

  1. public class RV_ItemDecorationActivity extends Activity implements MyOnItemClickLitener {
  3. 	private RecyclerView mRecyclerView;
  4. 	private MyRecyclerViewAdapter mRecyclerViewAdapter;
  5. 	private RecyclerView.ItemDecoration decoration;
  7. 	@Override
  8. 	protected void onCreate(Bundle savedInstanceState) {
  9. 		super.onCreate(savedInstanceState);
  10. 		setContentView(R.layout.activity_main);
  11. 		mRecyclerView = (RecyclerView) findViewById(R.id.rv);
  12. 		init();
  13. 	}
  14. 	
  15. 	protected void init() {
  16. 		List<String> mDatas = new ArrayList<String>();
  17. 		mDatas.add("0.添加VERTICAL间隔线");
  18. 		mDatas.add("1.添加HORIZONTAL间隔线");
  19. 		mDatas.add("2.移除VERTICAL间隔线");
  20. 		mDatas.add("3.recreate");
  21. 		mDatas.add("4.Horizontal_Divider_ItemDecoration");
  22. 		mDatas.add("5.Vertical_Divider_ItemDecoration");
  24. 		mDatas.add("6.不包含边界的空白间隔");
  25. 		mDatas.add("7.包含边界的空白间隔");
  26. 		mDatas.add("8.自定义图片间隔 true,false");
  27. 		mDatas.add("9.自定义颜色间隔 false,true");
  28. 		mDatas.add("10.显示但不绘制边界间隔");
  29. 		mDatas.add("11.不绘制左右边界间隔");
  30. 		mDatas.add("12.不绘制上下边界间隔");
  31. 		for (int i = ‘A‘; i < ‘z‘; i++) {
  32. 			mDatas.add("" + (char) i);
  33. 		}
  34. 		mRecyclerViewAdapter = new MyRecyclerViewAdapter(this, mDatas);
  35. 		mRecyclerViewAdapter.setOnItemClickLitener(this);
  36. 		decoration = new DividerItemDecoration(this, DividerItemDecoration.VERTICAL);
  38. 		mRecyclerView.setAdapter(mRecyclerViewAdapter);//设置adapter
  39. 		mRecyclerView.setLayoutManager(new GridLayoutManager(this, 4));//设置布局管理器
  40. 		mRecyclerView.setItemAnimator(new DefaultItemAnimator());//设置Item增加、移除动画
  41. 	}
  43. 	@Override
  44. 	public void onItemClick(View view, int position) {
  45. 		Toast.makeText(this, position + " 被点击了", Toast.LENGTH_SHORT).show();
  46. 		reInit(position);
  47. 	}
  48. 	
  49. 	@Override
  50. 	public void onItemLongClick(View view, int position) {
  51. 		Toast.makeText(this, position + "被长按了", Toast.LENGTH_SHORT).show();
  52. 	}
  54. 	private void reInit(int position) {
  55. 		switch (position) {
  56. 			case 0:
  57. 				mRecyclerView.addItemDecoration(decoration);//添加间隔线
  58. 				break;
  59. 			case 1:
  60. 				mRecyclerView.addItemDecoration(new DividerItemDecoration(this, DividerItemDecoration.HORIZONTAL));
  61. 				break;
  62. 			case 2:
  63. 				mRecyclerView.removeItemDecoration(decoration);//移除间隔线，即使没有添加也可以移除
  64. 				break;
  65. 			case 3:
  66. 				recreate();
  67. 				break;
  68. 			case 4://For layout manager having 【vertical orientation】 to draw horizontal divider
  69. 				mRecyclerView.addItemDecoration(new HorizontalDividerItemDecoration.Builder(this)//不能和Vertical*同时使用
  70. 						.margin(20)//距离【左右】边界的距离margin(leftMargin, rightMargin)
  71. 						.size(5)//高度
  72. 						.color(0xff0000ff)
  73. 						//.drawable(R.mipmap.ic_launcher)//间隔线不使用颜色而使用drawable，color()会把drawable()覆盖掉
  74. 						.positionInsideItem(false)//间隔线是否绘制在item内容的上面，默认为false
  75. 						.showLastDivider()//默认不显示最后一条间隔线
  76. 						.build());
  77. 				break;
  78. 			case 5://For layout manager having 【horizontal orientation】 to draw vertical divider
  79. 				mRecyclerView.setLayoutManager(new GridLayoutManager(this, 4, GridLayoutManager.HORIZONTAL, false));
  80. 				mRecyclerView.addItemDecoration(new VerticalDividerItemDecoration.Builder(this)//不能和Horizontal*同时使用
  81. 						.margin(20)//距离【上下】边界的距离margin(leftMargin, rightMargin)
  82. 						.size(5).color(0xff0000ff).build());
  83. 				break;
  84. 			case 6:
  85. 				mRecyclerView.addItemDecoration(new GridItemDecoration.Builder().spanCount(4).spaceSize(1).build());
  86. 				break;
  87. 			case 7:
  88. 				mRecyclerView.addItemDecoration(new GridItemDecoration.Builder().spanCount(4).spaceSize(50)
  89. 						.includeLREdge(true).includeTBEdge(true).build());//
  90. 				break;
  91. 			case 8:
  92. 				mRecyclerView.addItemDecoration(new GridItemDecoration.Builder().spanCount(4).spaceSize(12)
  93. 						.includeLREdge(true)
  94. 						.mDivider(getResources().getDrawable(R.mipmap.ic_launcher)).build());//
  95. 				break;
  96. 			case 9:
  97. 				mRecyclerView.addItemDecoration(new GridItemDecoration.Builder().spanCount(4).spaceSize(6)
  98. 						.includeTBEdge(true)
  99. 						.mDivider(new ColorDrawable(0x880000ff)).build());//
  100. 				break;
  101. 			case 10:
  102. 				mRecyclerView.addItemDecoration(new GridItemDecoration.Builder().spanCount(4).spaceSize(50)
  103. 						.includeLREdge(true).includeTBEdge(true).drawLREdge(false).drawTBEdge(false)
  104. 						.mDivider(new ColorDrawable(0x880000ff)).build());//
  105. 				break;
  106. 			case 11:
  107. 				mRecyclerView.addItemDecoration(new GridItemDecoration.Builder().spanCount(4).spaceSize(50)
  108. 						.includeLREdge(true).includeTBEdge(true).drawLREdge(false)
  109. 						.mDivider(new ColorDrawable(0x880000ff)).build());//
  110. 				break;
  111. 			case 12:
  112. 				mRecyclerView.addItemDecoration(new GridItemDecoration.Builder().spanCount(4).spaceSize(50)
  113. 						.includeLREdge(true).includeTBEdge(true).drawTBEdge(false)
  114. 						.mDivider(new ColorDrawable(0x880000ff)).build());//
  115. 				break;
  116. 		}
  117. 	}
  118. }

GridItemDecoration

  1. /**
  2.  * 适用于GridView，支持在item之间设置任何类型的间距，支持控制是否显示上下左右间隔及是否绘制上下左右背景
  3.  */
  4. public class GridItemDecoration extends RecyclerView.ItemDecoration {
  6. 	private Drawable mDivider;
  7. 	private int spanCount;
  8. 	private int spaceSize;
  9. 	private boolean includeLREdge;
  10. 	private boolean includeTBEdge;
  11. 	private boolean drawLREdge;
  12. 	private boolean drawTBEdge;
  14. 	private GridItemDecoration(Builder builder) {
  15. 		mDivider = builder.mDivider;
  16. 		spanCount = builder.spanCount;
  17. 		spaceSize = builder.spaceSize;
  18. 		includeLREdge = builder.includeLREdge;
  19. 		includeTBEdge = builder.includeTBEdge;
  20. 		drawLREdge = builder.drawLREdge;
  21. 		drawTBEdge = builder.drawTBEdge;
  22. 	}
  23. 	
  24. 	@Override
  25. 	public String toString() {
  26. 		return "GridItemDecoration{" +
  27. 				"spanCount=" + spanCount +
  28. 				", spaceSize=" + spaceSize +
  29. 				", includeLREdge=" + includeLREdge +
  30. 				", includeTBEdge=" + includeTBEdge +
  31. 				‘}‘;
  32. 	}
  34. 	@Override
  35. 	public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
  36. 		int position = parent.getChildAdapterPosition(view); // item position
  37. 		int column = position % spanCount; // item column
  39. 		if (includeLREdge) {
  40. 			outRect.left = spaceSize - column * spaceSize / spanCount;
  41. 			outRect.right = (column + 1) * spaceSize / spanCount;
  42. 		} else {
  43. 			outRect.left = column * spaceSize / spanCount;
  44. 			outRect.right = spaceSize - (column + 1) * spaceSize / spanCount;
  45. 		}
  47. 		if (includeTBEdge) {
  48. 			if (position < spanCount) outRect.top = spaceSize; // top edge
  49. 			outRect.bottom = spaceSize; // item bottom
  50. 		} else {
  51. 			if (position >= spanCount) outRect.top = spaceSize; // item top
  52. 		}
  53. 	}
  54. 	
  55. 	@Override
  56. 	public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {
  57. 		if (mDivider != null) {
  58. 			drawHorizontal(c, parent);
  59. 			drawVertical(c, parent);
  60. 			if (includeLREdge && drawLREdge) drawLR(c, parent);
  61. 			if (includeTBEdge && drawTBEdge) drawTB(c, parent);
  62. 		}
  63. 	}
  65. 	private void drawLR(Canvas c, RecyclerView parent) {
  66. 		int childCount = parent.getChildCount();
  67. 		for (int i = 0; i < childCount; i++) {
  68. 			View child = parent.getChildAt(i);
  69. 			//最左边那条线
  70. 			if (i % spanCount == 0) {
  71. 				int left = child.getLeft() - spaceSize;
  72. 				int right = left + spaceSize;
  73. 				int bottom = child.getBottom();
  74. 				int top = child.getTop() - spaceSize;
  75. 				if (i == 0) top = child.getTop(); //最上边那条线
  76. 				mDivider.setBounds(left, top, right, bottom);
  77. 				mDivider.draw(c);
  78. 			}
  80. 			//最右边那条线
  81. 			if ((i + 1) % spanCount == 0) {
  82. 				int left = child.getRight();
  83. 				int right = left + spaceSize;
  84. 				int bottom = child.getBottom();
  85. 				int top = child.getTop() - spaceSize;
  86. 				if (i == spanCount - 1) top = child.getTop(); //最上边那条线
  87. 				mDivider.setBounds(left, top, right, bottom);
  88. 				mDivider.draw(c);
  89. 			}
  90. 		}
  91. 	}
  92. 	
  93. 	private void drawTB(Canvas c, RecyclerView parent) {
  94. 		int childCount = parent.getChildCount();
  95. 		for (int i = 0; i < childCount; i++) {
  96. 			View child = parent.getChildAt(i);
  98. 			//最上边那条线
  99. 			if (i < spanCount) {
  100. 				int top = child.getTop() - spaceSize;
  101. 				int bottom = top + spaceSize;
  102. 				int left = child.getLeft();
  103. 				int right = child.getRight() + spaceSize;
  104. 				if ((i + 1) % spanCount == 0 ||
  105. 						(childCount < spanCount && i == childCount - 1)) right = child.getRight();    //最右边那条线
  107. 				mDivider.setBounds(left, top, right, bottom);
  108. 				mDivider.draw(c);
  109. 			}
  111. 			//最下边那条线
  112. 			if (childCount % spanCount == 0 && i >= spanCount * (childCount / spanCount - 1)) {
  113. 				int top = child.getBottom();
  114. 				int bottom = top + spaceSize;
  115. 				int left = child.getLeft() - spaceSize;
  116. 				int right = child.getRight();
  117. 				if ((i + 1) % spanCount == 0) right = child.getRight() + spaceSize;    //最右边那条线
  119. 				mDivider.setBounds(left, top, right, bottom);
  120. 				mDivider.draw(c);
  121. 			} else if (i >= spanCount * (childCount / spanCount)) {
  122. 				int top = child.getBottom();
  123. 				int bottom = top + spaceSize;
  124. 				int right = child.getRight();
  125. 				int left = child.getLeft() - spaceSize;
  126. 				if (!drawLREdge && i % spanCount == 0) left = child.getLeft(); //最左边那条线
  128. 				mDivider.setBounds(left, top, right, bottom);
  129. 				mDivider.draw(c);
  130. 			}
  131. 		}
  132. 	}
  134. 	private void drawHorizontal(Canvas c, RecyclerView parent) {
  135. 		int childCount = parent.getChildCount();
  136. 		for (int i = 0; i < childCount; i++) {
  137. 			if (i >= spanCount) {
  138. 				View child = parent.getChildAt(i);
  139. 				int left = child.getLeft() - spaceSize;
  140. 				if (i % spanCount == 0) left = child.getLeft();
  141. 				int right = child.getRight();
  142. 				int top = child.getTop() - spaceSize;
  143. 				int bottom = top + spaceSize;
  144. 				mDivider.setBounds(left, top, right, bottom);
  145. 				mDivider.draw(c);
  146. 			}
  147. 		}
  148. 	}
  149. 	
  150. 	private void drawVertical(Canvas c, RecyclerView parent) {
  151. 		int childCount = parent.getChildCount();
  152. 		for (int i = 0; i < childCount; i++) {
  153. 			if (i % spanCount != 0) {
  154. 				View child = parent.getChildAt(i);
  155. 				int top = child.getTop();
  156. 				int bottom = child.getBottom();
  157. 				int left = child.getLeft() - spaceSize;
  158. 				int right = left + spaceSize;
  159. 				mDivider.setBounds(left, top, right, bottom);
  160. 				mDivider.draw(c);
  161. 			}
  162. 		}
  163. 	}
  165. 	static final class Builder {
  166. 		private Drawable mDivider = null;
  167. 		private int spanCount;
  168. 		private int spaceSize;
  169. 		private boolean includeLREdge = false;
  170. 		private boolean includeTBEdge = false;
  171. 		private boolean drawLREdge = true;
  172. 		private boolean drawTBEdge = true;
  174. 		public Builder() {
  175. 		}
  177. 		/**
  178. 		 * 若不指定，则使用空白代替
  179. 		 */
  180. 		public Builder mDivider(Drawable val) {
  181. 			mDivider = val;
  182. 			return this;
  183. 		}
  185. 		/**
  186. 		 * 行数或列数
  187. 		 */
  188. 		public Builder spanCount(int val) {
  189. 			spanCount = val;
  190. 			return this;
  191. 		}
  193. 		/**
  194. 		 * 行列间距大小
  195. 		 */
  196. 		public Builder spaceSize(int val) {
  197. 			spaceSize = val;
  198. 			return this;
  199. 		}
  201. 		/**
  202. 		 * 是否包含左右边界
  203. 		 */
  204. 		public Builder includeLREdge(boolean val) {
  205. 			includeLREdge = val;
  206. 			return this;
  207. 		}
  209. 		/**
  210. 		 * 是否包含上下边界
  211. 		 */
  212. 		public Builder includeTBEdge(boolean val) {
  213. 			includeTBEdge = val;
  214. 			return this;
  215. 		}
  217. 		/**
  218. 		 * 是否绘制左右边界
  219. 		 */
  220. 		public Builder drawLREdge(boolean val) {
  221. 			drawLREdge = val;
  222. 			return this;
  223. 		}
  225. 		/**
  226. 		 * 是否绘制上下边界
  227. 		 */
  228. 		public Builder drawTBEdge(boolean val) {
  229. 			drawTBEdge = val;
  230. 			return this;
  231. 		}
  233. 		public GridItemDecoration build() {
  234. 			return new GridItemDecoration(this);
  235. 		}
  236. 	}
  237. }

BRVAHActivity

  1. public class BRVAHActivity extends Activity implements BaseQuickAdapter.RequestLoadMoreListener, SwipeRefreshLayout.OnRefreshListener {
  2. 	private List<String> mDatas;
  3. 	private RecyclerView mRecyclerView;
  4. 	private PullToRefreshAdapter mAdapter;
  5. 	private SwipeRefreshLayout mSwipeRefreshLayout;
  7. 	private static final int TOTAL_COUNTER = 18;
  8. 	private static final int PAGE_SIZE = 6;
  9. 	private static final int DELAY_MILLIS = 1000;
  10. 	private int mCurrentCounter = 0;
  12. 	private boolean isErr;
  13. 	private boolean mLoadMoreEndGone = false;
  15. 	@Override
  16. 	protected void onCreate(Bundle savedInstanceState) {
  17. 		super.onCreate(savedInstanceState);
  19. 		setContentView(R.layout.activity_main);
  20. 		mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipeLayout);
  21. 		mSwipeRefreshLayout.setOnRefreshListener(this);
  22. 		mSwipeRefreshLayout.setColorSchemeColors(Color.rgb(47, 223, 189));
  24. 		mRecyclerView = (RecyclerView) findViewById(R.id.rv);
  25. 		mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
  27. 		initDate();
  28. 		initAdapter();
  30. 		ImageView headView = new ImageView(this);
  31. 		headView.setImageResource(R.mipmap.ic_launcher);
  32. 		mAdapter.addHeaderView(headView);
  33. 	}
  35. 	private void initDate() {
  36. 		mDatas = new ArrayList<String>();
  37. 		for (int i = ‘A‘; i < ‘z‘; i++) {
  38. 			mDatas.add("" + (char) i);
  39. 		}
  40. 	}
  42. 	private void initAdapter() {
  43. 		mAdapter = new PullToRefreshAdapter();
  44. 		mAdapter.setOnLoadMoreListener(this, mRecyclerView);
  45. 		mAdapter.openLoadAnimation(BaseQuickAdapter.SLIDEIN_RIGHT);//动画
  46. 		mAdapter.setPreLoadNumber(3);//预加载
  47. 		mRecyclerView.setAdapter(mAdapter);
  48. 		mCurrentCounter = mAdapter.getData().size();
  50. 		//item点击事件
  51. 		mAdapter.setOnItemClickListener(new BaseQuickAdapter.OnItemClickListener() {
  52. 			@Override
  53. 			public void onItemClick(BaseQuickAdapter adapter, View view, int position) {
  54. 				Toast.makeText(BRVAHActivity.this, "onItemClick" + position, Toast.LENGTH_SHORT).show();
  55. 			}
  56. 		});
  57. 		//item中View的点击事件
  58. 		mAdapter.setOnItemChildClickListener(new BaseQuickAdapter.OnItemChildClickListener() {
  59. 			@Override
  60. 			public void onItemChildClick(BaseQuickAdapter adapter, View view, int position) {
  61. 				Toast.makeText(BRVAHActivity.this, "onItemChildClick" + position, Toast.LENGTH_SHORT).show();
  62. 			}
  63. 		});
  64. 	}
  66. 	@Override
  67. 	public void onLoadMoreRequested() {
  68. 		mSwipeRefreshLayout.setEnabled(false);
  69. 		if (mAdapter.getData().size() < PAGE_SIZE) {
  70. 			mAdapter.loadMoreEnd(true);
  71. 		} else {
  72. 			if (mCurrentCounter >= TOTAL_COUNTER) {
  73. 				//pullToRefreshAdapter.loadMoreEnd();//default visible
  74. 				mAdapter.loadMoreEnd(mLoadMoreEndGone);//true is gone,false is visible
  75. 			} else {
  76. 				if (isErr) {
  77. 					mAdapter.addData("新数据");
  78. 					mCurrentCounter = mAdapter.getData().size();
  79. 					mAdapter.loadMoreComplete();
  80. 				} else {
  81. 					isErr = true;
  82. 					Toast.makeText(BRVAHActivity.this, "错误", Toast.LENGTH_LONG).show();
  83. 					mAdapter.loadMoreFail();
  84. 				}
  85. 			}
  86. 			mSwipeRefreshLayout.setEnabled(true);
  87. 		}
  88. 	}
  90. 	@Override
  91. 	public void onRefresh() {
  92. 		mAdapter.setEnableLoadMore(false);//禁止加载
  93. 		new Handler().postDelayed(new Runnable() {
  94. 			@Override
  95. 			public void run() {
  96. 				mAdapter.setNewData(mDatas);
  97. 				isErr = false;
  98. 				mCurrentCounter = PAGE_SIZE;
  99. 				mSwipeRefreshLayout.setRefreshing(false);
  100. 				mAdapter.setEnableLoadMore(true);//启用加载
  101. 			}
  102. 		}, DELAY_MILLIS);
  103. 	}
  105. 	class PullToRefreshAdapter extends BaseQuickAdapter<String, BaseViewHolder> {
  106. 		public PullToRefreshAdapter() {
  107. 			super(R.layout.item2, mDatas);
  108. 		}
  110. 		@Override
  111. 		protected void convert(BaseViewHolder helper, String item) {
  112. 			helper.setText(R.id.id_num, item)
  113. 					.setImageResource(R.id.iv, R.drawable.actionbar_add_icon)
  114. 					.addOnClickListener(R.id.iv);
  115. 		}
  116. 	}
  117. }

依赖

  1. dependencies {
  2.     compile fileTree(dir: ‘libs‘, include: [‘*.jar‘])
  3.     androidTestCompile(‘com.android.support.test.espresso:espresso-core:2.2.2‘, {
  4.         exclude group: ‘com.android.support‘, module: ‘support-annotations‘
  5.     })
  6.     compile ‘com.android.support:appcompat-v7:25.3.1‘
  7.     compile ‘com.android.support:recyclerview-v7:25.3.1‘
  8.     testCompile ‘junit:junit:4.12‘
  9.     compile ‘com.yqritc:recyclerview-flexibledivider:1.4.0‘
  10.     compile ‘com.github.CymChad:BaseRecyclerViewAdapterHelper:2.9.17‘
  11. }





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