android：DataBinding使用小结（四）

DataBinding在RecycleView中结合BaseRecyclerViewAdapterHelper的使用

引入BaseRecyclerViewAdapterHelper

在app的build.gradle中

implementation 'com.github.CymChad:BaseRecyclerViewAdapterHelper:2.9.30'

在Project的build.gradle中

allprojects {
    repositories {
        maven { url "https://jitpack.io" }
        jcenter()
    }
}

创建BaseActivity

package tsou.cn.databinding;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import java.util.LinkedList;
import java.util.List;


public abstract class BaseActivity extends AppCompatActivity {
    private static List<BaseActivity> activities = new LinkedList<BaseActivity>();
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        synchronized (activities) {
            activities.add(this);
        }
    }

    protected void finishAllActivity() {
        List<BaseActivity> tempList;
        synchronized (activities) {
            tempList = new LinkedList<BaseActivity>(activities);
        }
        for (BaseActivity a : tempList) {
            a.finish();
        }

    }

    @Override
    protected void onDestroy() {
        activities.remove(this);
        try {
            System.gc();
        } catch (Exception e) {
        }
        super.onDestroy();
    }


}

创建BaseRecyclerViewActivity处理布局绑定

package tsou.cn.databinding;

import android.databinding.DataBindingUtil;
import android.databinding.ViewDataBinding;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;


public abstract class BaseRecyclerViewActivity<M extends ViewDataBinding> extends BaseActivity {
    protected View notDataView;
    protected View errorView;
    protected M binding;
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        binding = DataBindingUtil.setContentView(this, getLayoutId());
        setEmptyAndErrorView(getRecyclerView(), R.mipmap.icon_empty, getString(R.string.the_server_did_not_return_data));
        initData(savedInstanceState);
        initListener();

    }
    public abstract int getLayoutId();
    public abstract RecyclerView getRecyclerView();

    protected abstract void initData(Bundle savedInstanceState);

    protected void initListener() {
    }

    protected void setEmptyAndErrorView(RecyclerView mRecyclerView, int emptyIcon, String emptyText) {
        notDataView = getLayoutInflater().inflate(R.layout.empty_view, (ViewGroup) mRecyclerView.getParent(), false);
        ImageView empty_icon = (ImageView) notDataView.findViewById(R.id.iv_empty_icon);
        TextView empty_text = (TextView) notDataView.findViewById(R.id.tv_empty_no_data);
        empty_icon.setImageResource(emptyIcon);
        empty_text.setText(emptyText);
        notDataView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                onRefresh();
            }
        });
        errorView = getLayoutInflater().inflate(R.layout.error_view, (ViewGroup) mRecyclerView.getParent(), false);
        errorView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                onRefresh();
            }
        });
    }

    protected void onRefresh() {
    }


}

数据LoadMore

package tsou.cn.databinding.bean;

/**
 * Created by Administrator on 2018/5/31 0031.
 */

public class LoadMore {
    private String name;
    private String imaggUrl;

    public LoadMore(String name, String imaggUrl) {
        this.name = name;
        this.imaggUrl = imaggUrl;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getImaggUrl() {
        return imaggUrl;
    }

    public void setImaggUrl(String imaggUrl) {
        this.imaggUrl = imaggUrl;
    }
}

item布局item_load_more

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:bind="http://schemas.android.com/apk/res-auto">
    <data>
        <variable
            name="loadMore"
            type="tsou.cn.databinding.bean.LoadMore" />
    </data>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:layout_marginBottom="5dp"
        android:orientation="vertical">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:layout_margin="10dp"
            android:textSize="16sp"
            android:textColor="@android:color/black"
            android:text="@{loadMore.name,default=标题}" />

        <ImageView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            bind:url="@{loadMore.imaggUrl}"
            android:src="@mipmap/ic_launcher_round" />
    </LinearLayout>
</layout>

LoadMoreAdapter

package tsou.cn.databinding.adapter;

import android.databinding.DataBindingUtil;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.ViewGroup;
import android.widget.ImageView;

import com.bumptech.glide.Glide;
import com.chad.library.adapter.base.BaseQuickAdapter;

import java.util.List;

import tsou.cn.databinding.R;
import tsou.cn.databinding.bean.LoadMore;
import tsou.cn.databinding.databinding.ItemLoadMoreBinding;
import tsou.cn.databinding.viewholder.MyBaseViewHolder;

/**
 * Created by Administrator on 2018/5/31 0031.
 */

public class LoadMoreAdapter extends BaseQuickAdapter<LoadMore, MyBaseViewHolder> {

    public LoadMoreAdapter(@Nullable List<LoadMore> data) {
        super(data);
    }

    @Override
    protected MyBaseViewHolder onCreateDefViewHolder(ViewGroup parent, int viewType) {
        ItemLoadMoreBinding binding = DataBindingUtil.inflate(LayoutInflater.from(mContext),
                R.layout.item_load_more, parent, false);
        return new MyBaseViewHolder(binding.getRoot());
    }

    @Override
    protected void convert(MyBaseViewHolder holder, LoadMore item) {
        ItemLoadMoreBinding binding = DataBindingUtil.getBinding(holder.itemView);
        binding.setLoadMore(item);
        binding.executePendingBindings();
    }
}

MyBaseViewHolder

package tsou.cn.databinding.viewholder;

import android.view.View;

import com.chad.library.adapter.base.BaseViewHolder;

public class MyBaseViewHolder extends BaseViewHolder {

    public MyBaseViewHolder(View view) {
        super(view);
    }
}

Activity调用

package tsou.cn.databinding;

import android.graphics.Color;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;

import com.chad.library.adapter.base.BaseQuickAdapter;

import java.lang.ref.WeakReference;
import java.util.ArrayList;

import tsou.cn.databinding.adapter.LoadMoreAdapter;
import tsou.cn.databinding.bean.LoadMore;
import tsou.cn.databinding.databinding.ActivityLoadMoreRecyclerViewBinding;
import tsou.cn.databinding.view.CustomLoadMoreView;

public class LoadMoreRecyclerViewActivity extends BaseRecyclerViewActivity<ActivityLoadMoreRecyclerViewBinding>
        implements SwipeRefreshLayout.OnRefreshListener,
        BaseQuickAdapter.RequestLoadMoreListener, BaseQuickAdapter.OnItemClickListener {
    private LoadMoreAdapter adapter;
    private ArrayList<LoadMore> loadMores = new ArrayList<>();
    private int mLastIndex;
    private MyHandler myHandler;


    @Override
    public int getLayoutId() {
        return R.layout.activity_load_more_recycler_view;
    }

    @Override
    public RecyclerView getRecyclerView() {
        return binding.recyclerView;
    }

    protected void initData(Bundle savedInstanceState) {
        binding.recyclerView.setLayoutManager(new LinearLayoutManager(this));
        binding.swipeRefresh.setColorSchemeColors(Color.rgb(63, 81,
                181));
        adapter = new LoadMoreAdapter(loadMores);
        adapter.isFirstOnly(false);
        //慢慢淡进
        //adapter.openLoadAnimation(BaseQuickAdapter.ALPHAIN);
        //慢慢放大进入
        //adapter.openLoadAnimation(BaseQuickAdapter.SCALEIN);
        //从下滑入
        adapter.openLoadAnimation(BaseQuickAdapter.SLIDEIN_BOTTOM);
        //从左滑入
        //adapter.openLoadAnimation(BaseQuickAdapter.SLIDEIN_LEFT);
        //从有滑入
        //adapter.openLoadAnimation(BaseQuickAdapter.SLIDEIN_RIGHT);
        adapter.setLoadMoreView(new CustomLoadMoreView());
        binding.recyclerView.setAdapter(adapter);

        adapter.setEnableLoadMore(false);
        adapter.setEmptyView(R.layout.loading_view, (ViewGroup) binding.recyclerView.getParent());
        binding.swipeRefresh.setEnabled(false);
        myHandler = new MyHandler(this);
        fetchData(true);
    }

    @Override
    protected void initListener() {
        super.initListener();
        binding.swipeRefresh.setOnRefreshListener(this);
        adapter.setOnLoadMoreListener(this, binding.recyclerView);
        adapter.setOnItemClickListener(this);
    }

    @Override
    public void onRefresh() {
        if (adapter.getData().isEmpty())
            adapter.setEmptyView(R.layout.loading_view, (ViewGroup) binding.recyclerView.getParent());
        adapter.setEnableLoadMore(false);
        fetchData(true);
    }

    @Override
    public void onLoadMoreRequested() {
        if (binding.swipeRefresh != null) {
            binding.swipeRefresh.setEnabled(false);
            mLastIndex++;
            fetchData(false);
        }
    }

    @Override
    public void onItemClick(BaseQuickAdapter adapter, View view, int position) {

    }

    private void fetchData(boolean isRefresh) {
        if (isRefresh) {
            mLastIndex = 1;
        }
        myHandler.sendEmptyMessageDelayed(0, 3000);

    }

    private static class MyHandler extends Handler {

        private WeakReference<LoadMoreRecyclerViewActivity> nowActivity;

        public MyHandler(LoadMoreRecyclerViewActivity nowActivity) {
            this.nowActivity = new WeakReference<LoadMoreRecyclerViewActivity>(nowActivity);
        }

        @Override
        public void handleMessage(Message msg) {
            super.handleMessage(msg);
            LoadMoreRecyclerViewActivity activity = nowActivity.get();
            if (activity == null || activity.isFinishing()) {
                return;
            }
            switch (msg.what) {
                case 0:
                    ArrayList<LoadMore> loadMores = activity.loadMores;
                    int mLastIndex = activity.mLastIndex;
                    ActivityLoadMoreRecyclerViewBinding binding = activity.binding;
                    LoadMoreAdapter adapter = activity.adapter;
                    ArrayList<LoadMore> loadMoresCurrent = new ArrayList<>();
                    if (mLastIndex == 1) {
                        loadMores.clear();
                        for (int i = 0; i < 10; i++) {
                            loadMoresCurrent.add(new LoadMore("晓果" + i, "https://unsplash.it/200/200?random&" + i));
                        }
                        loadMores.addAll(loadMoresCurrent);
                    } else {
                        for (int i = 11; i < 20; i++) {
                            loadMoresCurrent.add(new LoadMore("晓果" + i, "https://unsplash.it/200/200?random&" + i));
                        }
                    }
                    if (mLastIndex == 1) {
                        adapter.setNewData(loadMores);
                        binding.swipeRefresh.setEnabled(true);
                        binding.swipeRefresh.setRefreshing(false);
                        adapter.setEnableLoadMore(true);
                    } else {
                        if (loadMoresCurrent.size() == 0) {
                            adapter.loadMoreEnd();
                        } else {
                            adapter.addData(loadMoresCurrent);
                            adapter.loadMoreComplete();

                        }
                        binding.swipeRefresh.setEnabled(true);
                    }
                    break;
            }
        }
    }

}

BindingAdapter处理图片显示

package tsou.cn.databinding.utils;

import android.databinding.BindingAdapter;
import android.databinding.BindingConversion;
import android.widget.ImageView;
import android.widget.TextView;

import com.bumptech.glide.Glide;

/**
 * Created by Administrator on 2018/5/30 0030.
 */

public class ImageUtil {
    @BindingAdapter({"url"})
    public static void loadImage(ImageView view, String url) {

        Glide.with(UIUtils.getContext()).load(url).into(view);
    }

    @BindingAdapter("android:text")
    public static void setText(TextView view, String text) {
        view.setText(text + "-追加的数据");
    }

    @BindingConversion
    public static String conversionString(String text) {
        return text + "-conversionString";
    }
}

加载更多样式CustomLoadMoreView

package tsou.cn.databinding.view;


import com.chad.library.adapter.base.loadmore.LoadMoreView;

import tsou.cn.databinding.R;

/**
 * Created by BlingBling on 2016/10/15.
 */

public final class CustomLoadMoreView extends LoadMoreView {

    @Override
    public int getLayoutId() {
        return R.layout.view_load_more;
    }

    @Override
    protected int getLoadingViewId() {
        return R.id.load_more_loading_view;
    }

    @Override
    protected int getLoadFailViewId() {
        return R.id.load_more_load_fail_view;
    }

    @Override
    protected int getLoadEndViewId() {
        return R.id.load_more_load_end_view;
    }
}

效果

Demo地址：https://download.csdn.net/download/huangxiaoguo1/10454497

android：DataBinding使用小结（四）

DataBinding在RecycleView中结合BaseRecyclerViewAdapterHelper的使用

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