CustomExampleActivity.java

package com.scwang.refreshlayout.activity.example;

import android.content.Context;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.Space;
import android.widget.TextView;

import com.scwang.refreshlayout.R;
import com.scwang.refreshlayout.adapter.BaseRecyclerAdapter;
import com.scwang.refreshlayout.adapter.SmartViewHolder;
import com.scwang.smartrefresh.layout.api.RefreshHeader;
import com.scwang.smartrefresh.layout.api.RefreshKernel;
import com.scwang.smartrefresh.layout.api.RefreshLayout;
import com.scwang.smartrefresh.layout.constant.RefreshState;
import com.scwang.smartrefresh.layout.constant.SpinnerStyle;
import com.scwang.smartrefresh.layout.internal.ArrowDrawable;
import com.scwang.smartrefresh.layout.internal.ProgressDrawable;
import com.scwang.smartrefresh.layout.listener.OnRefreshListener;
import com.scwang.smartrefresh.layout.util.SmartUtil;

import java.util.Arrays;
import java.util.Collection;

import static android.R.layout.simple_list_item_2;

/**
 * 自定义Header功能使用
 */
public class CustomExampleActivity extends AppCompatActivity {

    private BaseRecyclerAdapter<Void> mAdapter;

    private static boolean isFirstEnter = true;

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

        final Toolbar toolbar = findViewById(R.id.toolbar);
        toolbar.setNavigationOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });

        ListView listView = findViewById(R.id.listView);
        listView.setAdapter(mAdapter = new BaseRecyclerAdapter<Void>(simple_list_item_2) {
            @Override
            protected void onBindViewHolder(SmartViewHolder holder, Void model, int position) {
                holder.text(android.R.id.text1, getString(R.string.item_example_number_title, position));
                holder.text(android.R.id.text2, getString(R.string.item_example_number_abstract, position));
                holder.textColorId(android.R.id.text2, R.color.colorTextAssistant);
            }
        });

        final RefreshLayout refreshLayout = findViewById(R.id.refreshLayout);
        refreshLayout.setOnRefreshListener(new OnRefreshListener() {
            @Override
            public void onRefresh(@NonNull final RefreshLayout refreshLayout) {
                refreshLayout.getLayout().postDelayed(new Runnable() {
                    @Override
                    public void run() {
                        mAdapter.refresh(initData());
                        refreshLayout.finishRefresh();
                    }
                }, 2000);
            }
        });

        refreshLayout.setRefreshHeader(new ClassicsHeader(this));
        refreshLayout.setHeaderHeight(60);

        //触发自动刷新
        if (isFirstEnter) {
            isFirstEnter = false;
            refreshLayout.autoRefresh();
        } else {
            mAdapter.refresh(initData());
        }

    }

    private Collection<Void> initData() {
        return Arrays.asList(null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null);
    }

    public static class ClassicsHeader extends LinearLayout implements RefreshHeader {

        private TextView mHeaderText;//标题文本
        private ImageView mArrowView;//下拉箭头
        private ImageView mProgressView;//刷新动画视图
        private ProgressDrawable mProgressDrawable;//刷新动画

        public ClassicsHeader(Context context) {
            this(context, null);
        }
        public ClassicsHeader(Context context, AttributeSet attrs) {
            super(context, attrs, 0);
            setGravity(Gravity.CENTER);
            mHeaderText = new TextView(context);
            mProgressDrawable = new ProgressDrawable();
            mArrowView = new ImageView(context);
            mProgressView = new ImageView(context);
            mProgressView.setImageDrawable(mProgressDrawable);
            mArrowView.setImageDrawable(new ArrowDrawable());
            addView(mProgressView, SmartUtil.dp2px(20), SmartUtil.dp2px(20));
            addView(mArrowView, SmartUtil.dp2px(20), SmartUtil.dp2px(20));
            addView(new Space(context), SmartUtil.dp2px(20), SmartUtil.dp2px(20));
            addView(mHeaderText, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
            setMinimumHeight(SmartUtil.dp2px(60));
        }
        @NonNull
        public View getView() {
            return this;//真实的视图就是自己，不能返回null
        }
        @NonNull
        @Override
        public SpinnerStyle getSpinnerStyle() {
            return SpinnerStyle.Translate;//指定为平移，不能null
        }

        @Override
        public void onStartAnimator(@NonNull RefreshLayout layout, int height, int maxDragHeight) {
            mProgressDrawable.start();//开始动画
        }

        @Override
        public int onFinish(@NonNull RefreshLayout layout, boolean success) {
            mProgressDrawable.stop();//停止动画
            mProgressView.setVisibility(GONE);//隐藏动画
            if (success){
                mHeaderText.setText("刷新完成");
            } else {
                mHeaderText.setText("刷新失败");
            }
            return 500;//延迟500毫秒之后再弹回
        }

        @Override
        public void onStateChanged(@NonNull RefreshLayout refreshLayout, @NonNull RefreshState oldState, @NonNull RefreshState newState) {
            switch (newState) {
                case None:
                case PullDownToRefresh:
                    mHeaderText.setText("下拉开始刷新");
                    mArrowView.setVisibility(VISIBLE);//显示下拉箭头
                    mProgressView.setVisibility(GONE);//隐藏动画
                    mArrowView.animate().rotation(0);//还原箭头方向
                    break;
                case Refreshing:
                    mHeaderText.setText("正在刷新");
                    mProgressView.setVisibility(VISIBLE);//显示加载动画
                    mArrowView.setVisibility(GONE);//隐藏箭头
                    break;
                case ReleaseToRefresh:
                    mHeaderText.setText("释放立即刷新");
                    mArrowView.animate().rotation(180);//显示箭头改为朝上
                    break;
            }
        }

        @Override
        public void setPrimaryColors(int... colors) {

        }

        @Override
        public void onAutoRefresh(boolean isAutoRefresh) {

        }

        @Override
        public void onInitialized(@NonNull RefreshKernel kernel, int height, int maxDragHeight) {

        }

        @Override
        public void onMoving(boolean isDragging, float percent, int offset, int height, int maxDragHeight) {

        }

//        @Override
//        public void onPulling(float percent, int offset, int height, int maxDragHeight) {
//
//        }
//        @Override
//        public void onReleasing(float percent, int offset, int height, int maxDragHeight) {
//
//        }

        @Override
        public void onReleased(@NonNull RefreshLayout refreshLayout, int height, int maxDragHeight) {

        }

        @Override
        public void onHorizontalDrag(float percentX, int offsetX, int offsetMax) {

        }

        @Override
        public boolean isSupportHorizontalDrag() {
            return false;
        }
    }
}