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
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
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