GridView在ScrollView中实现在家更多

Posted 2020-08-15 梦见一只

这个本身会有bug  应该在滑动监听中作出判断的

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <ScrollView
        android:id="@+id/s"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fillViewport="false"
        android:scrollbars="none">
         <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="match_parent"
             android:orientation="vertical">
            <TextView
                android:id="@+id/love"
                android:layout_width="match_parent"
                android:layout_height="100dp"
                android:background="#fffccc"
                android:text="caini xihuan " />
             <com.maoyudun.alimamaproject.widget.MyGridView
                 android:id="@+id/fourth_GridView"
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
                 android:background="#f4f5f9"
                 android:horizontalSpacing="10px"
                 android:numColumns="2"
                 android:verticalSpacing="10px" />
             <LinearLayout
                 android:id="@+id/loadmore"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
                 android:gravity="center"
                 android:visibility="gone">
                 <ProgressBar
                     android:id="@+id/pb_progress"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_gravity="center"
                     android:indeterminateDrawable="@drawable/custom_progress" />
                 <TextView
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_gravity="center_vertical"
                     android:layout_marginLeft="5dp"
                     android:text="正在加载..."
                     android:textColor="@android:color/black"
                     android:textSize="20dp"
                     android:visibility="visible" />
             </LinearLayout>
        </LinearLayout>
    </ScrollView>
</RelativeLayout>  

解决显示不全的问题自定义的GridView

public class MyGridView extends GridView
{
    public MyGridView(Context context) {
        super(context);
    }
    public MyGridView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public MyGridView(Context context, AttributeSet attrs,
                      int defStyle) {
        super(context, attrs, defStyle);
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
                MeasureSpec.AT_MOST);
        super.onMeasure(widthMeasureSpec, expandSpec);
    }
}
定义接口监听什么时候显示最后一条数据

public interface LoadMoreGridViewListener {
    void loadMore(int position);
}
在adapter中调用接口回传数据

LoadMoreGridViewListener loadmore;
public void onLoadMoreListener(LoadMoreGridViewListener load){
    loadmore=load;
}

/**
 * 判断滑动的位置
 */
if(position==mDatas.size()-1){
    loadmore.loadMore(position);
}
在new adapater使用

void loadMore(int position);接口方法获取最后一个  

adapter.onLoadMoreListener(new LoadMoreGridViewListener() {
    @Override
    public void loadMore(int position) {
        loadmore.animate().translationY(0).setDuration(300).setInterpolator(new AccelerateDecelerateInterpolator())
                .setListener(new Animator.AnimatorListener() {
                    @Override
                    public void onAnimationStart(Animator animation) {
                        loadmore.setVisibility(View.VISIBLE);
                        handler.sendEmptyMessageDelayed(1,5000);

                    }

                    @Override
                    public void onAnimationEnd(Animator animation) {

                    }

                    @Override
                    public void onAnimationCancel(Animator animation) {

                    }

                    @Override
                    public void onAnimationRepeat(Animator animation) {

                    }
                });
    }
});

隐藏加载更多的时候直接GONE