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RecyclerViewDividerItemDecorationActivity.java
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RecyclerViewDividerItemDecorationActivity.java
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package com.tiny.demo.firstlinecode.ui.view;
import android.content.Context;
import android.content.Intent;
import android.graphics.drawable.ColorDrawable;
import android.graphics.drawable.Drawable;
import android.support.v4.content.ContextCompat;
import android.support.v7.widget.DividerItemDecoration;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import com.tiny.demo.firstlinecode.R;
import com.tiny.demo.firstlinecode.base.BaseActivity;
import com.tiny.demo.firstlinecode.common.utils.AppUtils;
import com.tiny.demo.firstlinecode.ui.adapter.DividerAdapter;
import com.tiny.demo.firstlinecode.ui.bean.Fruit;
import com.tinytongtong.tinyutils.LogUtils;
import com.tinytongtong.tinyutils.ScreenUtils;
import java.util.ArrayList;
import java.util.List;
import butterknife.BindView;
/**
* @Description: 使用系统提供的DividerItemDecoration绘制分割线
* https://www.jianshu.com/p/86aaaa49ed3e
* @Author wangjianzhou@qding.me
* @Date 2019-08-07 11:04
* @Version
*/
public class RecyclerViewDividerItemDecorationActivity extends BaseActivity {
public static final String TAG = RecyclerViewDividerItemDecorationActivity.class.getSimpleName().substring(0, 23);
@BindView(R.id.recycler_view)
RecyclerView recyclerView;
public static void actionStart(Context context) {
Intent starter = new Intent(context, RecyclerViewDividerItemDecorationActivity.class);
context.startActivity(starter);
}
@Override
protected int setContentLayout() {
return R.layout.activity_recycler_view_divider_item_decoration;
}
@Override
protected void buildContentView() {
}
@Override
protected void initViewData() {
recyclerView.setLayoutManager(new LinearLayoutManager(this));
// recyclerView.addItemDecoration(new MyDividerItemDecoration());
// DividerItemDecoration会改变item的高度
DividerItemDecoration dividerItemDecoration = new DividerItemDecoration(this, DividerItemDecoration.VERTICAL);
// 可以通过setDrawable方法使用自定义样式的分割线
// 1、设置颜色——每个item高度减少1px,很奇怪,竟然减少了
// dividerItemDecoration.setDrawable(new ColorDrawable(ContextCompat.getColor(mContext,R.color.colorPrimary)));
// 2、设置shape——每个item高度增加shape的高度,这里是10dp
Drawable drawable = ContextCompat.getDrawable(mContext, R.drawable.shape_divider);
dividerItemDecoration.setDrawable(drawable);
// 3、设置图片——分割线的高度就是图片的高度,图片会有拉伸。图片大小36*5
// Drawable drawableIcon = ContextCompat.getDrawable(mContext,R.drawable.ic_gray_line);
// dividerItemDecoration.setDrawable(drawableIcon);
recyclerView.addItemDecoration(dividerItemDecoration);
List<Fruit> lists = initFruits();
// Fruit fruit = new Fruit();
// fruit.setType(1);
// lists.add(fruit);
DividerAdapter dividerAdapter = new DividerAdapter(lists);
recyclerView.setAdapter(dividerAdapter);
recyclerView.post(() -> {
// 获取屏幕可用高度,包含可用的navigationBar高度。
int screenHeight = ScreenUtils.INSTANCE.getScreenH(mContext);
LogUtils.INSTANCE.e(TAG, "screenHeight: " + screenHeight);
// 获取statusBar高度
int statusBarHeight = AppUtils.getStatusBarHeight(mContext);
LogUtils.INSTANCE.e(TAG, "statusBarHeight: " + statusBarHeight);
// 获取recyclerView可滚动的高度
int recyclerViewRealHeight = recyclerView.computeVerticalScrollRange();
LogUtils.INSTANCE.e(TAG, "recyclerViewRealHeight: " + recyclerViewRealHeight);
float leftHeight = screenHeight - recyclerViewRealHeight - statusBarHeight;
LogUtils.INSTANCE.e(TAG, "leftHeight: " + leftHeight);
});
}
private List<Fruit> initFruits() {
List<Fruit> fruits = new ArrayList<>();
for (int i = 0; i < 10; i++) {
Fruit fruit = new Fruit("erha --> " + i, R.drawable.ic_erha);
fruits.add(fruit);
}
return fruits;
}
}