Created
October 7, 2014 18:26
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Android ListView load more on scrolling : http://devahoy.com/2014/10/android-load-more-listview-with-scrolling-example
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package com.devahoy.android.scrolltoloadlistview; | |
import android.app.ListActivity; | |
import android.app.ProgressDialog; | |
import android.os.Bundle; | |
import android.os.Handler; | |
import android.util.Log; | |
import android.widget.AbsListView; | |
import android.widget.ArrayAdapter; | |
import android.widget.Toast; | |
import java.util.ArrayList; | |
import java.util.List; | |
public class MyActivity extends ListActivity { | |
private List<String> mTotalData = new ArrayList<String>(); | |
private List<String> mCurrentData = new ArrayList<String>(); | |
private int mCurrentPage = 1; | |
private int mItemPerRow = 20; | |
private boolean isLoadMore = false; | |
private Handler mHandler = new Handler(); | |
private ProgressDialog mLoading; | |
@Override | |
protected void onCreate(Bundle savedInstanceState) { | |
super.onCreate(savedInstanceState); | |
mLoading = new ProgressDialog(this); | |
mLoading.setProgressStyle(ProgressDialog.STYLE_SPINNER); | |
mLoading.setMessage("Loading...."); | |
for (int i = 1; i <= 300; i++) { | |
mTotalData.add("Item #" + i); | |
} | |
// init first 20 items | |
getData(); | |
final ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, | |
android.R.layout.simple_list_item_1, mCurrentData); | |
setListAdapter(adapter); | |
getListView().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 lastInScreen = firstVisibleItem + visibleItemCount; | |
Log.d("TEST", "first : " + firstVisibleItem); | |
Log.d("TEST", "visible : " + visibleItemCount); | |
Log.d("TEST", "total : " + totalItemCount); | |
if ((lastInScreen == totalItemCount) && !isLoadMore && (firstVisibleItem != 0)) { | |
isLoadMore = true; | |
mLoading.show(); | |
mHandler.postDelayed(new Runnable() { | |
@Override | |
public void run() { | |
getData(); | |
adapter.notifyDataSetChanged(); | |
isLoadMore = false; | |
mLoading.dismiss(); | |
} | |
}, 1500); | |
} | |
} | |
}); | |
} | |
private void getData() { | |
if (mItemPerRow * mCurrentPage >= mTotalData.size()) { | |
Toast.makeText(this, "No Data", Toast.LENGTH_SHORT).show(); | |
return; | |
} | |
for (int i = 0; i < mItemPerRow; i++) { | |
mCurrentData.add(mTotalData.get(i + (( mCurrentPage - 1) * mItemPerRow)) ); | |
} | |
mCurrentPage += 1; | |
} | |
} |
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