如何使用 NestedScrollView 进行分页?

Dan*_*ooq 1 pagination android android-recyclerview recyclerview-layout android-nestedscrollview

当我使用嵌套滚动视图进行分页时,需要花费太多时间,有时我的应用程序会挂起?请告诉我使用嵌套滚动视图实现分页的正确方法

Sur*_*nav 5

在你的包中添加这个类

    import android.content.Context;
import android.support.v4.widget.NestedScrollView;
import android.util.AttributeSet;
import android.view.View;

public class TouchDetectableScrollView extends NestedScrollView {

    OnMyScrollChangeListener myScrollChangeListener;

    public TouchDetectableScrollView(Context context) {
        super(context);
    }

    public TouchDetectableScrollView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public TouchDetectableScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onScrollChanged(int l, int t, int oldl, int oldt) {
        super.onScrollChanged(l, t, oldl, oldt);

        if (myScrollChangeListener!=null)
        {
            if (t>oldt)
            {
                myScrollChangeListener.onScrollDown();
            }
            else if (t<oldt){
                myScrollChangeListener.onScrollUp();
            }
            View view = (View) getChildAt(getChildCount()-1);
            int diff = (view.getBottom()-(getHeight()+getScrollY()));
            if (diff == 0 ) {
                myScrollChangeListener.onBottomReached();
            }
        }
    }

    public OnMyScrollChangeListener getMyScrollChangeListener() {
        return myScrollChangeListener;
    }

    public void setMyScrollChangeListener(OnMyScrollChangeListener myScrollChangeListener) {
        this.myScrollChangeListener = myScrollChangeListener;
    }

    public interface OnMyScrollChangeListener
    {
            public void onScrollUp();
            public void onScrollDown();
            public void onBottomReached();
    }
}
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现在在您的 xml 和 java 代码中TouchDetectableScrollView使用它。NestedScrollView并像这样设置监听器:

TouchDetectableScrollView nestedScrollView=findViewById(R.id.nestedScrollView);
        nestedScrollView.setMyScrollChangeListener(new TouchDetectableScrollView.OnMyScrollChangeListener() {
            @Override
            public void onScrollUp() {

            }

            @Override
            public void onScrollDown() {

            }

            @Override
            public void onBottomReached() {
                // api call for pagination
            }
        });
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onBottomReached在方法中完成分页任务