这是我的代码,我曾经以列表的形式从我的数据库中获取数据。但是,在向上滚动一下后立即向下滚动时,它总是令人耳目一新。我只需要在最顶层时才能进行刷新。
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.widget.SwipeRefreshLayout;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;
import com.shuan.Project.R;
import com.shuan.Project.Utils.Common;
import com.shuan.Project.adapter.ConnectAdapter;
import com.shuan.Project.asyncTasks.GetHome;
import com.shuan.Project.asyncTasks.GetPost;
import com.shuan.Project.employer.PostViewActivity;
import com.shuan.Project.list.Sample;
import java.util.ArrayList;
import java.util.HashMap;
public class OffersFragment extends Fragment {
private ArrayList<Sample> list;
private ConnectAdapter adapter;
private ListView listView;
private HashMap<String, String> cData;
private Common mApp;
private Context mContext;
private ProgressBar progressBar;
private SwipeRefreshLayout swipe;
public OffersFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
mContext=getActivity();
mApp= (Common) mContext.getApplicationContext();
View view = inflater.inflate(R.layout.fragment_employer_home, container, false);
swipe = (SwipeRefreshLayout) view.findViewById(R.id.swipe);
listView = (ListView) view.findViewById(R.id.post);
progressBar = (ProgressBar) view.findViewById(R.id.progress_bar);
list = new ArrayList<Sample>();
new GetPost(getActivity(), listView, progressBar, mApp.getPreference().getString(Common.u_id,""),"all", swipe).execute();
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
TextView txt = (TextView) view.findViewById(R.id.jId);
TextView txt1= (TextView) view.findViewById(R.id.frm_id);
Intent in=new Intent(getActivity(),PostViewActivity.class);
in.putExtra("jId",txt.getText().toString());
in.putExtra("frmId",txt1.getText().toString());
in.putExtra("apply","no");
startActivity(in);
}
});
swipe.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
new GetHome(getActivity(), listView, progressBar, mApp.getPreference().getString(Common.u_id, ""), "all",swipe).execute();
}
});
return view;
}
}
我的xml文件
<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/swipe"
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.shuan.Project.fragment.ConnectionFragment">
<ProgressBar
android:id="@+id/progress_bar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true" />
<ListView
android:id="@+id/post"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:divider="@null"
android:visibility="gone" />
</RelativeLayout>
答案 0 :(得分:4)
更改您的xml布局,以便SwipeRefreshLayout仅包装可滚动视图(您的情况是ListView)。
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.shuan.Project.fragment.ConnectionFragment">
<ProgressBar
android:id="@+id/progress_bar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true" />
<android.support.v4.widget.SwipeRefreshLayout
android:id="@+id/swipe"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView
android:id="@+id/post"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:divider="@null"
android:visibility="gone" />
</android.support.v4.widget.SwipeRefreshLayout>
</RelativeLayout>
答案 1 :(得分:1)
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/swipe_container"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<com.enhancedListView.EnhancedListView
android:id="@+id/listaNoticias"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="6dp"
android:layout_marginRight="6dp"
android:layout_marginTop="5dp" >
</com.enhancedListView.EnhancedListView>
</android.support.v4.widget.SwipeRefreshLayout>
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
view = inflater.inflate(R.layout.principal, container, false);
swipeLayout = (SwipeRefreshLayout) view.findViewById(R.id.swipe_container);
swipeLayout.setOnRefreshListener(this);
swipeLayout.setColorSchemeColors(android.R.color.holo_green_dark,
android.R.color.holo_red_dark,
android.R.color.holo_blue_dark,
android.R.color.holo_orange_dark); (...)
@Override
public void onRefresh() {
new myTask().execute();
}
答案 2 :(得分:1)
我为上述问题找到了自己的解决方案。我们可以通过更改上面的代码来解决问题。
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.widget.SwipeRefreshLayout;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;
import com.shuan.Project.R;
import com.shuan.Project.Utils.Common;
import com.shuan.Project.adapter.ConnectAdapter;
import com.shuan.Project.asyncTasks.GetHome;
import com.shuan.Project.asyncTasks.GetPost;
import com.shuan.Project.employer.PostViewActivity;
import com.shuan.Project.list.Sample;
import java.util.ArrayList;
import java.util.HashMap;
public class OffersFragment extends Fragment implements AbsListView.OnScrollListener {
private ArrayList<Sample> list;
private ConnectAdapter adapter;
private ListView listView;
private HashMap<String, String> cData;
private Common mApp;
private Context mContext;
private ProgressBar progressBar;
private SwipeRefreshLayout swipe;
private int preLast;
public OffersFragment() {
// Required empty public constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
mContext=getActivity();
mApp= (Common) mContext.getApplicationContext();
View view = inflater.inflate(R.layout.fragment_employer_home, container, false);
swipe = (SwipeRefreshLayout) view.findViewById(R.id.swipe);
listView = (ListView) view.findViewById(R.id.post);
progressBar = (ProgressBar) view.findViewById(R.id.progress_bar);
list = new ArrayList<Sample>();
new GetPost(getActivity(), listView, progressBar, mApp.getPreference().getString(Common.u_id,""),"all", swipe).execute();
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
TextView txt = (TextView) view.findViewById(R.id.jId);
TextView txt1= (TextView) view.findViewById(R.id.frm_id);
Intent in=new Intent(getActivity(),PostViewActivity.class);
in.putExtra("jId",txt.getText().toString());
in.putExtra("frmId",txt1.getText().toString());
in.putExtra("apply","no");
startActivity(in);
}
});
listView.setOnScrollListener(this);
swipe.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
new GetHome(getActivity(), listView, progressBar, mApp.getPreference().getString(Common.u_id, ""), "all",swipe).execute();
}
});
return view;
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
if (view.getId() == R.id.post) {
if (firstVisibleItem == 0) {
swipe.setEnabled(true);
int lastItem = firstVisibleItem + visibleItemCount;
if (lastItem == totalItemCount) {
if (preLast != lastItem) {
preLast = lastItem;
//Toast.makeText(getActivity(), "In Last", Toast.LENGTH_SHORT).show();
}
}else{
}
} else {
swipe.setEnabled(false);
}
}
}
}
答案 3 :(得分:0)
添加以下代码行 注意:LinearLayoutManager应该单独定义
mRecyclerView = (RecyclerView) view.findViewById(R.id.recyclerView);
mLayoutManager = new LinearLayoutManager(getActivity());
mRecyclerView.setLayoutManager(mLayoutManager);
mRecyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
mSwipeRefreshLayout.setEnabled
(mLinearLayoutManager.findFirstCompletelyVisibleItemPosition() == 0);
}
});
findFirstCompletelyVisibleItemPosition()== 0表示位于recyclerview的顶部
答案 4 :(得分:0)
这有点老了,但是在2019年,这是正确的答案:您必须在NestedScrollView中包含RecyclerView才能使SwipeRefreshLayout正常运行,如下所示:
<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
android:id="@+id/swipeRefreshLayout"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.core.widget.NestedScrollView
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
</androidx.core.widget.NestedScrollView>
</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>