懒加载

app/src/main/AndroidManifest.xml

@@ -44,6 +44,10 @@
         <activity
             android:name=".StartActivity"
             android:theme="@style/AppThemeLaunch" />
+
+        <activity android:name=".ListLazyLoadingActivity2" />
+        <activity android:name=".ListLazyLoadingActivity" />
+        <activity android:name=".TestListLazyLoadingActivity" />
         <activity android:name=".PlayerActivity" />
         <activity android:name=".PlayerActivtiy2" />
         <activity android:name=".FunctionActivity" />

app/src/main/java/com/mayi/demo/ListLazyLoadingActivity.java

+package com.mayi.demo;
+
+import android.os.Bundle;
+import android.os.Handler;
+
+import com.mayi.fastdevelop.base.BaseActivity;
+import com.mayi.fastdevelop.view.lazyLoading.ListLazyLoadingView;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ListLazyLoadingActivity extends BaseActivity implements ListLazyLoadingView.ListLazyLoadingViewListener {
+
+    private ListLazyLoadingView view;
+    private MyListLazyLoadingAdapter adapter;
+    private Handler handler;
+    private List<Integer> list = new ArrayList<>();
+    private int addItemCount, maxItemCount;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.layout_1);
+        addItemCount = getIntent().getIntExtra("addItemCount", 10);
+        maxItemCount = getIntent().getIntExtra("maxItemCount", 50);
+        for (int i = 0; i < 20; i++) {
+            list.add(0);
+        }
+        handler = new Handler();
+        view = findViewById(R.id.view);
+        view.setListLazyLoadingViewListener(this);
+        adapter = new MyListLazyLoadingAdapter(list);
+        view.setListLazyLoadingAdapter(adapter);
+    }
+
+    @Override
+    public void onLoadMore() {
+        handler.postDelayed(new Runnable() {
+            @Override
+            public void run() {
+                for (int i = 0; i < addItemCount; i++) {
+                    list.add(0);
+                }
+                if (list.size() >= maxItemCount) {
+                    view.setLoadingAll(true);
+                }
+                view.finishLoadMore();
+                adapter.notifyDataSetChanged();
+            }
+        }, 1000);
+    }
+}

app/src/main/java/com/mayi/demo/ListLazyLoadingActivity2.java

+package com.mayi.demo;
+
+import android.os.Bundle;
+import android.os.Handler;
+
+import com.mayi.fastdevelop.base.BaseActivity;
+import com.mayi.fastdevelop.view.lazyLoading.ListLazyLoadingView;
+import com.scwang.smartrefresh.layout.SmartRefreshLayout;
+import com.scwang.smartrefresh.layout.api.RefreshLayout;
+import com.scwang.smartrefresh.layout.listener.OnRefreshListener;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ListLazyLoadingActivity2 extends BaseActivity implements ListLazyLoadingView.ListLazyLoadingViewListener {
+
+    private ListLazyLoadingView view;
+    private MyListLazyLoadingAdapter adapter;
+    private Handler handler;
+    private List<Integer> list = new ArrayList<>();
+    private int addItemCount, maxItemCount;
+    private SmartRefreshLayout layout;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.layout_2);
+        addItemCount = getIntent().getIntExtra("addItemCount", 10);
+        maxItemCount = getIntent().getIntExtra("maxItemCount", 50);
+        for (int i = 0; i < 20; i++) {
+            list.add(0);
+        }
+        handler = new Handler();
+        layout = findViewById(R.id.layout);
+        view = findViewById(R.id.view);
+        view.setListLazyLoadingViewListener(this);
+        adapter = new MyListLazyLoadingAdapter(list);
+        view.setListLazyLoadingAdapter(adapter);
+        layout.setEnableRefresh(true);
+        layout.setEnableLoadmore(false);
+        layout.setOnRefreshListener(new OnRefreshListener() {
+            @Override
+            public void onRefresh(RefreshLayout refreshlayout) {
+                list.clear();
+                for (int i = 0; i < 20; i++) {
+                    list.add(0);
+                }
+                layout.finishRefresh();//完成刷新
+                view.setLoadingAll(false);
+                adapter.notifyDataSetChanged();
+            }
+        });
+    }
+
+    @Override
+    public void onLoadMore() {
+        handler.postDelayed(new Runnable() {
+            @Override
+            public void run() {
+                for (int i = 0; i < addItemCount; i++) {
+                    list.add(0);
+                }
+                if (list.size() >= maxItemCount) {
+                    view.setLoadingAll(true);
+                }
+                view.finishLoadMore();
+                adapter.notifyDataSetChanged();
+            }
+        }, 1000);
+    }
+
+}

app/src/main/java/com/mayi/demo/MyListLazyLoadingAdapter.java

+package com.mayi.demo;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.mayi.fastdevelop.view.lazyLoading.ListLazyLoadingAdapter;
+
+import java.util.List;
+
+public class MyListLazyLoadingAdapter extends ListLazyLoadingAdapter<MyListLazyLoadingAdapter.TVVH> {
+
+    private List<Integer> list;
+
+    public MyListLazyLoadingAdapter(List<Integer> list) {
+        this.list = list;
+    }
+
+
+    @Override
+    public void onBindItemVH(@NonNull TVVH holder, int position) {
+        holder.tv.setText("第"+position+"个");
+    }
+
+    @Override
+    public List getList() {
+        return list;
+    }
+
+    @Override
+    public TVVH getCreateViewHolder(@NonNull ViewGroup parent,int viewType) {
+        return new TVVH(LayoutInflater.from(parent.getContext()).
+                inflate(R.layout.item_tv,parent,false));
+    }
+
+
+    public class TVVH extends RecyclerView.ViewHolder {
+
+        TextView tv;
+
+        public TVVH(@NonNull View itemView) {
+            super(itemView);
+            tv = itemView.findViewById(R.id.tv);
+        }
+    }
+
+}

app/src/main/java/com/mayi/demo/TestListLazyLoadingActivity.java

+package com.mayi.demo;
+
+import android.os.Bundle;
+import android.view.View;
+import android.widget.EditText;
+
+
+import com.mayi.fastdevelop.base.BaseActivity;
+
+public class TestListLazyLoadingActivity extends BaseActivity {
+
+    private EditText et, et2;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.test_1);
+        et = findViewById(R.id.et1);
+        et2 = findViewById(R.id.et2);
+        findViewById(R.id.bt).setOnClickListener(this);
+        findViewById(R.id.bt1).setOnClickListener(this);
+    }
+
+    @Override
+    protected void onMultiClick(View v) {
+        Bundle bundle = new Bundle();
+        String s = et.getText().toString();
+        int i = Integer.valueOf(s);
+        bundle.putInt("addItemCount", i);
+        s = et2.getText().toString();
+        i = Integer.valueOf(s);
+        bundle.putInt("maxItemCount", i);
+        if (v.getId() == R.id.bt) {
+            gotoActivity(ListLazyLoadingActivity.class, bundle);
+        } else if (v.getId() == R.id.bt1) {
+            gotoActivity(ListLazyLoadingActivity2.class, bundle);
+        }
+    }
+}

app/src/main/java/com/mayi/demo/ViewActviity.java

@@ -159,6 +159,13 @@ public class ViewActviity extends BaseActivity {
                 gotoActivity(OnMultiClickActivity.class);
             }
         });
+
+        findViewById(R.id.b14).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                gotoActivity(TestListLazyLoadingActivity.class);
+            }
+        });
     }
 
 }

app/src/main/res/layout/item_tv.xml

+<?xml version="1.0" encoding="utf-8"?>
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/tv"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:gravity="center"
+    android:padding="@dimen/im_dp_5"
+    android:text="加载中。。。"
+    android:textColor="@color/black"
+    android:textSize="@dimen/txt_size_28px" />

app/src/main/res/layout/layout_1.xml

+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical" android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+
+    <com.mayi.fastdevelop.view.lazyLoading.ListLazyLoadingView
+        android:id="@+id/view"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"/>
+
+</LinearLayout>
\ No newline at end of file

app/src/main/res/layout/layout_2.xml

+<?xml version="1.0" encoding="utf-8"?>
+<com.scwang.smartrefresh.layout.SmartRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/layout"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <com.mayi.fastdevelop.view.lazyLoading.ListLazyLoadingView
+        android:id="@+id/view"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent" />
+
+</com.scwang.smartrefresh.layout.SmartRefreshLayout>
\ No newline at end of file

app/src/main/res/layout/test_1.xml

+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <Button
+        android:id="@+id/bt1"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="跳转懒加载+下拉刷新控件展示页,"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+
+    <Button
+        android:id="@+id/bt"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="跳转懒加载控件展示页"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/bt1" />
+
+    <EditText
+        android:id="@+id/et1"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:hint="每次加载个数"
+        android:inputType="number"
+        android:text="5"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/bt" />
+
+    <EditText
+        android:id="@+id/et2"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:hint="最多个数"
+        android:inputType="number"
+        android:text="50"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/et1" />
+
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file

app/src/main/res/layout/test_layout.xml

@@ -90,5 +90,11 @@
             android:layout_height="wrap_content"
             android:text="防止多次点击" />
 
+        <Button
+            android:id="@+id/b14"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="懒加载" />
+
     </LinearLayout>
 </ScrollView>
\ No newline at end of file

fastDevelop/build.gradle

@@ -30,6 +30,10 @@ android {
 
 dependencies {
     api fileTree(include: ['*.jar'], dir: 'libs')
+
+    api 'androidx.constraintlayout:constraintlayout:1.1.3'
+    api 'androidx.recyclerview:recyclerview:1.0.0'
+
     api 'com.yanzhenjie:permission:2.0.0-rc12'//权限申请
     api 'com.scwang.smartrefresh:SmartRefreshLayout:1.0.3'//下拉刷新，加载更多
     api 'com.youth.banner:banner:1.4.10'  //图片轮播控件
@@ -39,10 +43,8 @@ dependencies {
     api 'com.tencent.bugly:nativecrashreport:3.6.0.1'
     api 'com.orhanobut:logger:2.2.0'
     api 'com.alibaba:fastjson:1.2.12'
-    api 'androidx.recyclerview:recyclerview:1.0.0'
     api files('libs/zixing-core-3.2.0.jar')
 //    api project(':call')
     api 'com.gc:call:1.0.0'
     api 'com.google.android.exoplayer:exoplayer:2.10.5'
-
-}
+}
\ No newline at end of file

fastDevelop/src/main/java/com/mayi/fastdevelop/view/lazyLoading/ListLazyLoadingAdapter.java

+package com.mayi.fastdevelop.view.lazyLoading;
+
+import android.view.LayoutInflater;
+import android.view.ViewGroup;
+
+import androidx.annotation.NonNull;
+
+import com.mayi.fastdevelop.R;
+
+import java.util.List;
+
+import static androidx.recyclerview.widget.RecyclerView.*;
+
+public abstract class ListLazyLoadingAdapter<T extends ViewHolder> extends ListLazyLoadingView.Adapter {
+
+    public static final int LOADMORE_VIEWTYPE = -1;
+
+    private boolean isShowLoadMore = true;
+
+    @NonNull
+    @Override
+    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        if (viewType == LOADMORE_VIEWTYPE) {
+            return getLoadMoreVH(parent);
+        } else {
+            return getCreateViewHolder( parent,viewType);
+        }
+    }
+
+    //获取加载更多VH，子类可重现
+    public ViewHolder getLoadMoreVH(@NonNull ViewGroup parent) {
+        return new ViewHolder(LayoutInflater.from(parent.getContext()).
+                inflate(R.layout.item_list_lazy_loading_load_more, parent, false)){
+        };
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
+        if (position < getList().size()) {
+            onBindItemVH((T) holder, position);
+        }
+    }
+
+    @Override
+    public int getItemCount() {
+        if (getList() == null) {
+            return 0;
+        } else {
+            if (isShowLoadMore) {
+                return getList().size() + 1;
+            } else {
+                return getList().size();
+            }
+        }
+    }
+
+    public abstract void onBindItemVH(@NonNull T holder, int position);
+
+    public abstract List getList();
+
+    public abstract T getCreateViewHolder(@NonNull ViewGroup parent,int viewType);
+
+
+    @Override
+    public int getItemViewType(int position) {
+        if (isShowLoadMore && position + 1 == getItemCount()) {
+            return LOADMORE_VIEWTYPE;
+        }
+        return super.getItemViewType(position);
+    }
+
+    public boolean isShowLoadMore() {
+        return isShowLoadMore;
+    }
+
+    public void setShowLoadMore(boolean showLoadMore) {
+        isShowLoadMore = showLoadMore;
+    }
+
+}

fastDevelop/src/main/java/com/mayi/fastdevelop/view/lazyLoading/ListLazyLoadingView.java

+package com.mayi.fastdevelop.view.lazyLoading;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+import android.view.View;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
+
+
+/**
+ * 列表懒加载控件
+ */
+public class ListLazyLoadingView extends RecyclerView {
+
+    private LinearLayoutManager manager;
+    private boolean isLoadingAll = false;//是否加载全部
+    private int surplusItemCount = 5;
+    private ListLazyLoadingViewListener listLazyLoadingViewListener;
+    private boolean isLoading;//是否加载数据中
+
+    public ListLazyLoadingView(@NonNull Context context) {
+        super(context);
+        init();
+    }
+
+    public ListLazyLoadingView(@NonNull Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+        init();
+    }
+
+    public ListLazyLoadingView(@NonNull Context context, @Nullable AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        init();
+    }
+
+    private int lastAction;
+
+    private void init() {
+        manager = new LinearLayoutManager(getContext(), VERTICAL, false);
+        setLayoutManager(manager);
+
+        setOnTouchListener(new OnTouchListener() {
+            @Override
+            public boolean onTouch(View v, MotionEvent event) {
+                lastAction = event.getAction();
+                return false;
+            }
+        });
+        addOnScrollListener(new OnScrollListener() {
+            @Override
+            public void onScrollStateChanged(@NonNull RecyclerView recyclerView, int newState) {
+                super.onScrollStateChanged(recyclerView, newState);
+                if (!isLoadingAll && !isLoading) {
+                    if (newState == SCROLL_STATE_IDLE && lastAction == MotionEvent.ACTION_UP) {
+                        //获取最后一个完全显示的ItemPosition
+                        int lastVisibleItem = manager.findLastCompletelyVisibleItemPosition();
+                        int totalItemCount = manager.getItemCount();
+                        if (totalItemCount - lastVisibleItem <= surplusItemCount) {
+                            //加载更多功能的代码
+                            if (listLazyLoadingViewListener != null) {
+                                isLoading = true;
+                                listLazyLoadingViewListener.onLoadMore();
+                            }
+                        }
+                    }
+                }
+            }
+        });
+    }
+
+    public void setListLazyLoadingAdapter(@Nullable ListLazyLoadingAdapter adapter) {
+        setAdapter(adapter);
+    }
+
+    public boolean isLoadingAll() {
+        return isLoadingAll;
+    }
+
+    public void setLoadingAll(boolean loadingAll) {
+        isLoadingAll = loadingAll;
+        Adapter adapter = getAdapter();
+        if (adapter != null && adapter instanceof ListLazyLoadingAdapter) {
+            ((ListLazyLoadingAdapter<ViewHolder>) adapter).setShowLoadMore(!loadingAll);
+        }
+    }
+
+    public void setListLazyLoadingViewListener(ListLazyLoadingViewListener listLazyLoadingViewListener) {
+        this.listLazyLoadingViewListener = listLazyLoadingViewListener;
+    }
+
+    public interface ListLazyLoadingViewListener {
+        public void onLoadMore();
+    }
+
+    //完成加载更多
+    public void finishLoadMore() {
+        isLoading = false;
+    }
+
+}

fastDevelop/src/main/res/layout/item_list_lazy_loading_load_more.xml

+<?xml version="1.0" encoding="utf-8"?>
+<TextView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:gravity="center"
+    android:padding="@dimen/im_dp_5"
+    android:textSize="@dimen/txt_size_28px"
+    android:textColor="@color/black"
+    android:text="加载中。。。" />