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add 增加自动加载更多
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@youlookwhat
youlookwhat committed Dec 22, 2021
1 parent 9a91c8a commit 9cb233f
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Showing 9 changed files with 181 additions and 40 deletions.
8 changes: 4 additions & 4 deletions ByRecyclerview/build.gradle
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Original file line number Diff line number Diff line change
@@ -1,12 +1,12 @@
apply plugin: 'com.android.library'

android {
compileSdkVersion 28
compileSdkVersion 29


defaultConfig {
minSdkVersion 14
targetSdkVersion 28
targetSdkVersion 29
versionCode 1
versionName "1.0"

Expand All @@ -26,6 +26,6 @@ dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])

// AppBarLayout
compileOnly 'com.google.android.material:material:1.0.0'
compileOnly 'androidx.recyclerview:recyclerview:1.0.0'
compileOnly 'com.google.android.material:material:1.2.1'
compileOnly 'androidx.recyclerview:recyclerview:1.1.0'
}
5 changes: 5 additions & 0 deletions ByRecyclerview/src/main/java/me/jingbin/library/BaseLoadMore.java
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,11 @@ public interface BaseLoadMore {
*/
void setState(int state);

/**
* 返回当前状态
*/
int getState();

/**
* 失败布局view，为了设置点击事件
*/
Expand Down
179 changes: 145 additions & 34 deletions ByRecyclerview/src/main/java/me/jingbin/library/ByRecyclerView.java
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Original file line number Diff line number Diff line change
Expand Up @@ -39,35 +39,34 @@ public class ByRecyclerView extends RecyclerView {
* Set the ItemViewType of the multiType adapter to a value less than 10000!!
* 多类型适配器的ItemViewType需要设置为小于10000的值!!
*/
private static final int TYPE_REFRESH_HEADER = 10000; // RefreshHeader type
private static final int TYPE_LOAD_MORE_VIEW = 10001; // LoadingMore type
private static final int TYPE_STATE_VIEW = 10002; // StateView type
private static final int TYPE_FOOTER_VIEW = 10003; // FooterView type
private static final int HEADER_INIT_INDEX = 10004; // HeaderView starting type
private List<Integer> mHeaderTypes = new ArrayList<>(); // HeaderView type list
private ArrayList<View> mHeaderViews = new ArrayList<>(); // HeaderView view list
private LinearLayout mFooterLayout; // FooterView layout
private FrameLayout mStateLayout; // StateView layout
private static final int TYPE_REFRESH_HEADER = 10000; // RefreshHeader type
private static final int TYPE_LOAD_MORE_VIEW = 10001; // LoadingMore type
private static final int TYPE_STATE_VIEW = 10002; // StateView type
private static final int TYPE_FOOTER_VIEW = 10003; // FooterView type
private static final int HEADER_INIT_INDEX = 10004; // HeaderView starting type
private ArrayList<Integer> mHeaderTypes = new ArrayList<>(); // HeaderView type list
private ArrayList<View> mHeaderViews = new ArrayList<>(); // HeaderView view list
private LinearLayout mFooterLayout; // FooterView layout
private FrameLayout mStateLayout; // StateView layout

private boolean mRefreshEnabled = false; // 是否 启动下拉刷新
private boolean mLoadMoreEnabled = false; // 是否 启动加载更多
private boolean mHeaderViewEnabled = false; // 是否 显示 HeaderView
private boolean mFootViewEnabled = false; // 是否 显示 FooterView
private boolean mStateViewEnabled = true; // 是否 显示 StateView
private boolean misNoLoadMoreIfNotFullScreen = false; // 是否 不满一屏不加载更多
private boolean misNoLoadMoreIfNotFullScreen = false; // 是否 不满一屏不加载更多，只对上拉松手加载(mLoadMoreEnabledStatus=1)有效

private boolean mIsLoadingData = false; // 是否正在加载更多
private boolean mIsNoMore = false; // 是否没有更多数据了
private boolean mIsScrollUp = false; // 手指是否上滑
private float mLastY = -1; // 手指按下的Y坐标值，用于处理下拉刷新View的高度
private float mPullStartY = 0; // 手指按下的Y坐标值，用于处理不满全屏时是否可进行上拉加载
private float mPullStartY = 0; // 手指按下的Y坐标值，用于处理不满全屏时是否可进行上拉松手加载
private float mPullMaxY; // 手指上滑最高点的值，值越小位置越高
private float mDragRate = 2.5f; // 下拉时候的偏移计量因子，越小拉动距离越短
private long mLoadMoreDelayMillis = 0; // 延迟多少毫秒后再调用加载更多接口
private long mRefreshDelayMillis = 0; // 延迟多少毫秒后再调用下拉刷新接口
private int mTouchSlop; // 大于这个值才处理
private int mStartX, mStartY; // 处理ViewPager2滑动问题时按下的横纵坐标
private int mDispatchTouchStatus; // 是否处理滑动事件
private int mPreLoadNumber = 1; // 默认滑动到倒数第[mPreLoadNumber]条数据加载，默认1
private int mLoadMoreEnabledStatus = 0; // 启动加载状态：0不开启，1开启上拉松手加载，2开启自动加载，3开启上拉松手加载后取消了(用于还原)，4开启自动加载后取消了(用于还原)

private OnRefreshListener mRefreshListener; // 下拉刷新监听
private BaseRefreshHeader mRefreshHeader; // 自定义下拉刷新布局需要实现的接口
Expand Down Expand Up @@ -175,17 +174,13 @@ public void loadMoreComplete() {
if (getLoadMoreSize() == 0) {
return;
}
mIsNoMore = false;
mIsLoadingData = false;
mLoadMore.setState(BaseLoadMore.STATE_COMPLETE);
}

/**
* The end. Cannot be loaded with pull up.
*/
public void loadMoreEnd() {
mIsLoadingData = false;
mIsNoMore = true;
mLoadMore.setState(BaseLoadMore.STATE_NO_MORE);
}

Expand All @@ -196,12 +191,10 @@ public void loadMoreFail() {
if (getLoadMoreSize() == 0 || mLoadMore.getFailureView() == null || mLoadMoreListener == null) {
return;
}
mIsLoadingData = false;
mLoadMore.setState(BaseLoadMore.STATE_FAILURE);
mLoadMore.getFailureView().setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
mIsLoadingData = true;
mLoadMore.setState(BaseLoadMore.STATE_LOADING);
if (mLoadMoreDelayMillis <= 0) {
mLoadMoreListener.onLoadMore();
Expand Down Expand Up @@ -262,7 +255,25 @@ public void setRefreshEnabled(boolean enabled) {
* Set whether to start loading more.
*/
public void setLoadMoreEnabled(boolean enabled) {
mLoadMoreEnabled = enabled;
if (enabled) {
// 开启
if (mLoadMoreEnabledStatus == 2 || mLoadMoreEnabledStatus == 4) {
// 之前是自动加载
mLoadMoreEnabledStatus = 2;
} else {
// 之前是上拉松手加载
mLoadMoreEnabledStatus = 1;
}
} else {
// 关闭
if (mLoadMoreEnabledStatus == 4 || mLoadMoreEnabledStatus == 2) {
// 之前是自动加载
mLoadMoreEnabledStatus = 4;
} else {
// 之前是上拉松手加载
mLoadMoreEnabledStatus = 3;
}
}
if (!enabled) {
mLoadMore.setState(BaseLoadMore.STATE_COMPLETE);
}
Expand Down Expand Up @@ -328,7 +339,7 @@ public int getSpanSize(int position) {
@Override
public void onScrollStateChanged(int state) {
super.onScrollStateChanged(state);
if (state == RecyclerView.SCROLL_STATE_IDLE && mLoadMoreListener != null && !mIsLoadingData && mLoadMoreEnabled) {
if (state == RecyclerView.SCROLL_STATE_IDLE && mLoadMoreListener != null && mLoadMoreEnabledStatus == 1 && mLoadMore != null && mLoadMore.getState() == BaseLoadMore.STATE_COMPLETE) {
LayoutManager layoutManager = getLayoutManager();
if (layoutManager == null) {
return;
Expand All @@ -345,13 +356,11 @@ public void onScrollStateChanged(int state) {

}
if (layoutManager.getChildCount() > 0
&& !mIsNoMore
&& lastVisibleItemPosition == mWrapAdapter.getItemCount() - 1 // 最后一个完全可视item是最后一个item
&& isNoFullScreenLoad()
&& isScrollLoad()
&& (!mRefreshEnabled || mRefreshHeader.getState() < BaseRefreshHeader.STATE_REFRESHING)) {
mIsScrollUp = false;
mIsLoadingData = true;
mLoadMore.setState(BaseLoadMore.STATE_LOADING);
if (mLoadMoreDelayMillis <= 0) {
mLoadMoreListener.onLoadMore();
Expand Down Expand Up @@ -431,11 +440,11 @@ public boolean onTouchEvent(MotionEvent ev) {
default:
/*
* 判断是否上拉了逻辑：
* 开启了加载更多
* 开启了上拉松手加载更多
* 按下的纵坐标 - 最后的纵坐标>=-10(为了更灵敏,原点向下惯性滑动时==0)
* 最高点的纵坐标 - 松开时的纵坐标<=150(为了防止上滑后然后再下拉)
*/
mIsScrollUp = mLoadMoreEnabled && mPullStartY - ev.getY() >= -10 && ev.getY() - mPullMaxY <= 150;
mIsScrollUp = (mLoadMoreEnabledStatus == 1) && mPullStartY - ev.getY() >= -10 && ev.getY() - mPullMaxY <= 150;

mPullStartY = 0;
mLastY = -1;
Expand Down Expand Up @@ -601,6 +610,7 @@ public int getItemViewType(int position) {
if (isStateView(position)) {
return TYPE_STATE_VIEW;
}
autoLoadMore(position);
if (isLoadMoreView(position)) {
return TYPE_LOAD_MORE_VIEW;
}
Expand Down Expand Up @@ -751,13 +761,75 @@ public boolean isRefreshHeader(int position) {
* Is it a LoadMoreView layout
*/
public boolean isLoadMoreView(int position) {
if (mLoadMoreEnabled) {
if (mLoadMoreEnabledStatus == 1 || mLoadMoreEnabledStatus == 2) {
return position == mWrapAdapter.getItemCount() - 1;
} else {
return false;
}
}

/**
* 自动加载更多以及预加载
*/
private void autoLoadMore(int position) {
if (!hasAutoLoadMoreView()) {
return;
}
if (position < mWrapAdapter.getItemCount() - mPreLoadNumber) {
// 倒数第mPreLoadNumber个数据才加载
return;
}
if (mRefreshEnabled && mRefreshHeader.getState() != BaseRefreshHeader.STATE_NORMAL) {
// 开启了下拉刷新并且不处于默认中
return;
}
// 加载更多
mLoadMore.setState(BaseLoadMore.STATE_LOADING);
if (mLoadMoreDelayMillis <= 0) {
mLoadMoreListener.onLoadMore();
} else {
postDelayed(new Runnable() {
@Override
public void run() {
mLoadMoreListener.onLoadMore();
}
}, mLoadMoreDelayMillis);
}
}

/**
* 预加载数量
*/
public void setPreLoadNumber(int preLoadNumber) {
if (preLoadNumber > 0) {
this.mPreLoadNumber = preLoadNumber;
}
}

/**
* 是否可以执行自动加载更多
*/
public boolean hasAutoLoadMoreView() {
if (mLoadMoreListener == null) {
return false;
}
if (mLoadMoreEnabledStatus != 2) {
return false;
}
if (mLoadMore.getState() != BaseLoadMore.STATE_COMPLETE) {
return false;
}
if (mWrapAdapter != null && mWrapAdapter.getOriginalAdapter() != null) {
if (mWrapAdapter.getOriginalAdapter() instanceof BaseByRecyclerViewAdapter) {
BaseByRecyclerViewAdapter originalAdapter = (BaseByRecyclerViewAdapter) (mWrapAdapter.getOriginalAdapter());
return originalAdapter.getData() != null && originalAdapter.getData().size() != 0;
} else {
return mWrapAdapter.getItemCount() - getPullHeaderSize() - getHeaderViewCount() - getFooterViewSize() - getLoadMoreSize() - getStateViewSize() != 0;
}
}
return true;
}

/**
* Get the number of FooterView
*/
Expand Down Expand Up @@ -824,17 +896,55 @@ public interface OnRefreshListener {
}

/**
* 设置上拉松手加载更多监听
*
* @param delayMillis How many milliseconds is the delay before the call OnLoadMoreListener
*/
public void setOnLoadMoreListener(OnLoadMoreListener listener, long delayMillis) {
setLoadMoreEnabled(true);
mLoadMoreListener = listener;
mLoadMoreDelayMillis = delayMillis;
setOnLoadMoreListener(false, mPreLoadNumber, listener, delayMillis);
}

/**
* 设置上拉松手加载更多监听
*/
public void setOnLoadMoreListener(OnLoadMoreListener listener) {
setOnLoadMoreListener(false, mPreLoadNumber, listener, 0);
}

/**
* 设置加载更多监听
*
* @param isAutoLoadMore 是否自动加载
*/
public void setOnLoadMoreListener(boolean isAutoLoadMore, OnLoadMoreListener listener) {
setOnLoadMoreListener(isAutoLoadMore, mPreLoadNumber, listener, 0);
}

/**
* 设置加载更多监听
*
* @param isAutoLoadMore 是否自动加载
* @param preLoadNumber 自动加载时，默认滑动到倒数第[preLoadNumber]条数据加载，默认1
* @param listener 监听器
*/
public void setOnLoadMoreListener(boolean isAutoLoadMore, int preLoadNumber, OnLoadMoreListener listener) {
setOnLoadMoreListener(isAutoLoadMore, preLoadNumber, listener, 0);
}

/**
* 设置加载更多监听
*
* @param isAutoLoadMore 是否自动加载
* @param preLoadNumber 自动加载时，默认滑动到倒数第[preLoadNumber]条数据加载，默认1
* @param listener 监听器
* @param delayMillis 延迟多少毫秒执行加载更多
*/
public void setOnLoadMoreListener(boolean isAutoLoadMore, int preLoadNumber, OnLoadMoreListener listener, long delayMillis) {
mLoadMoreEnabledStatus = isAutoLoadMore ? 2 : 1;
setLoadMoreEnabled(true);
setPreLoadNumber(preLoadNumber);
mLoadMoreListener = listener;
mLoadMoreDelayMillis = delayMillis;
}

/**
Expand Down Expand Up @@ -905,7 +1015,7 @@ public int getPullHeaderSize() {
* If a pull-up refresh is used, position needs to be counted
*/
public int getLoadMoreSize() {
if (mLoadMoreEnabled) {
if (mLoadMoreEnabledStatus == 1 || mLoadMoreEnabledStatus == 2) {
return 1;
} else {
return 0;
Expand Down Expand Up @@ -1193,7 +1303,7 @@ public void setDragRate(float rate) {
* Whether load more ongoing
*/
public boolean isLoadingMore() {
return mIsLoadingData;
return mLoadMore != null && mLoadMore.getState() == BaseLoadMore.STATE_LOADING;
}

/**
Expand Down Expand Up @@ -1266,7 +1376,7 @@ public boolean isRefreshEnabled() {
}

public boolean isLoadMoreEnabled() {
return mLoadMoreEnabled;
return mLoadMoreEnabledStatus == 1 || mLoadMoreEnabledStatus == 2;
}

public boolean isHeaderViewEnabled() {
Expand All @@ -1289,7 +1399,8 @@ public void destroy() {
mFootViewEnabled = false;
mStateViewEnabled = false;
mRefreshEnabled = false;
mLoadMoreEnabled = false;
mPreLoadNumber = 1;
mLoadMoreEnabledStatus = 0;
if (mHeaderViews != null) {
mHeaderViews.clear();
}
Expand Down
7 changes: 7 additions & 0 deletions ByRecyclerview/src/main/java/me/jingbin/library/SimpleLoadMoreView.java
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Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,7 @@ public class SimpleLoadMoreView extends LinearLayout implements BaseLoadMore {
private TextView tvNoMore;
private TextView tvMoreFailed;
private LinearLayout llMoreLoading;
private int mState = BaseLoadMore.STATE_COMPLETE;

public SimpleLoadMoreView(Context context) {
super(context);
Expand Down Expand Up @@ -67,6 +68,12 @@ public void setState(int state) {
} else {
viewBottom.setVisibility(View.GONE);
}
mState = state;
}

@Override
public int getState() {
return mState;
}

/**
Expand Down
4 changes: 2 additions & 2 deletions app/build.gradle
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Original file line number Diff line number Diff line change
Expand Up @@ -3,11 +3,11 @@ apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'

android {
compileSdkVersion 28
compileSdkVersion 29
defaultConfig {
applicationId "me.jingbin.byrecyclerview"
minSdkVersion 16
targetSdkVersion 28
targetSdkVersion 29
versionCode 9
versionName "1.2.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
Expand Down
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