当我将设备的屏幕移动到刷新rss新闻源时,它不起作用。我试图用swiperefreshlayout
刷新新闻。我不知道为什么,但它不起作用:
主要活动:
public class MainActivity extends AppCompatActivity {
RecyclerView recyclerView;
SwipeRefreshLayout refreshLayout;
private LinearLayoutManager linearLayoutManager;
private MyAdapter myRecyclerViewAdapter;
Context context;
ArrayList<FeedItem> feedItems=new ArrayList<FeedItem>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
refreshLayout=(SwipeRefreshLayout)findViewById(R.id.swipeLayout);
refreshLayout.setOnRefreshListener((SwipeRefreshLayout.OnRefreshListener) context);
refreshLayout.setColorSchemeColors(0, 0, 0, 0);
refreshLayout.setProgressBackgroundColor(android.R.color.transparent);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
recyclerView= (RecyclerView) findViewById(R.id.recyclerView);
ReadRss readRss=new ReadRss(this,recyclerView);
readRss.execute();
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
int topRowVerticalPosition =
(recyclerView == null || recyclerView.getChildCount() == 0) ? 0 : recyclerView.getChildAt(0).getTop();
refreshLayout.setEnabled(topRowVerticalPosition >= 0);
refreshLayout.setEnabled(linearLayoutManager.findFirstCompletelyVisibleItemPosition() == 0);
}
@Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
}
});
/*recyclerView= (RecyclerView) findViewById(R.id.recyclerview);
linearLayoutManager =
new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false);
myRecyclerViewAdapter = new MyAdapter(context,feedItems);
//myRecyclerViewAdapter.setOnItemClickListener(this);
recyclerView.setAdapter(myRecyclerViewAdapter);
recyclerView.setLayoutManager(linearLayoutManager);*/
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
CONTENT MAIN.XML:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="com.example.rssreader.MainActivity"
tools:showIn="@layout/activity_main">
<android.support.v4.widget.SwipeRefreshLayout
android:id="@+id/swipeLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="@+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scrollbars="vertical" />
</android.support.v4.widget.SwipeRefreshLayout>
</RelativeLayout>
答案 0 :(得分:1)
您必须将OnRefreshListener设置为SwipeRefreshListener并处理回调中的刷新。
mSwipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener()
{
@Override
public void onRefresh()
{
// handle your refresh logic
}
});
答案 1 :(得分:1)
您已在setOnRefreshListener
中定义了refreshLayout
,但未实施。
您必须在刷卡刷新布局上使用setOnRefreshListener
方法,如下所示。
refreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
// call your Refresh method here
mswipeRefreshLayout.setRefreshing(false);
}
});