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SwipeRefreshLayout
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<?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"> | |
<ListView | |
android:id="@+id/list" | |
android:layout_width="match_parent" | |
android:layout_height="match_parent"/> | |
</android.support.v4.widget.SwipeRefreshLayout> | |
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package com.example.swipelayout; | |
import android.app.Activity; | |
import android.os.Bundle; | |
import android.support.v4.widget.SwipeRefreshLayout; | |
import android.widget.ArrayAdapter; | |
import android.widget.BaseAdapter; | |
import android.widget.ListView; | |
import java.util.ArrayList; | |
import java.util.List; | |
import java.util.Random; | |
public class MyActivity extends Activity { | |
@Override | |
public void onCreate(Bundle savedInstanceState) { | |
super.onCreate(savedInstanceState); | |
setContentView(R.layout.main); | |
final ListView listView = (ListView) findViewById(R.id.list); | |
listView.setAdapter(createAdapter()); | |
final SwipeRefreshLayout refreshLayout = ((SwipeRefreshLayout) findViewById(R.id.swipe_container)); | |
refreshLayout.setColorScheme(R.color.progress_red, R.color.progress_green, R.color.progress_blue, R.color.progress_orange); | |
refreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() { | |
@Override | |
public void onRefresh() { | |
refreshLayout.postDelayed(new Runnable() { | |
@Override | |
public void run() { | |
listView.setAdapter(createAdapter()); | |
refreshLayout.setRefreshing(false); | |
} | |
}, 3000); | |
} | |
}); | |
listView.setOnScrollListener(new AbsListView.OnScrollListener() { | |
@Override | |
public void onScrollStateChanged(AbsListView view, int scrollState) { | |
} | |
@Override | |
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { | |
int topPosition = (listView == null || listView.getChildCount() == 0) ? 0 : listView.getChildAt(0).getTop(); | |
refreshLayout.setEnabled(topPosition >= 0); | |
} | |
}); | |
} | |
private BaseAdapter createAdapter() { | |
return new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, generateData()); | |
} | |
private List<String> generateData() { | |
List<String> data = new ArrayList<String>(); | |
Random random = new Random(System.currentTimeMillis()); | |
for (int i = 0; i < 20; i++) { | |
data.add(String.valueOf(random.nextInt(1000))); | |
} | |
return data; | |
} | |
} |
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