无法获取卡索引 [英] Unable to get the card index
本文介绍了无法获取卡索引的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在尝试使用此代码获取在屏幕上处于活动状态的卡的索引.
I am trying to get the index of the card which is active on the screen with this code.
import java.util.ArrayList;
import java.util.Arrays;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import com.google.android.glass.app.Card;
import com.google.android.glass.touchpad.Gesture;
import com.google.android.glass.touchpad.GestureDetector;
import com.google.android.glass.widget.CardScrollAdapter;
import com.google.android.glass.widget.CardScrollView;
import com.google.api.services.mirror.model.TimelineItem;
public class MainActivity extends Activity {
private GestureDetector mGestureDetector;
String identifysource;
int cardindex;
private static ArrayList<Card> sourceCard = new ArrayList<Card>();
private ArrayList<String> sourceText = new ArrayList<String>(Arrays.asList("PCWorld", "TechCrunch"));
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
for(int i=0;i<sourceText.size();i++)
{
System.out.println("whats up");
Card card = new Card(this);
identifysource=sourceText.get(i);
card.setText(identifysource);
sourceCard.add(card);
}
System.out.println(this);
mGestureDetector = createGestureDetector(this);
CardScrollView csvCardsView = new CardScrollView(this);
csaAdapter cvAdapter = new csaAdapter();
csvCardsView.setAdapter(cvAdapter);
csvCardsView.activate();
setContentView(csvCardsView);
cardindex=csvCardsView.getSelectedItemPosition();
}
private static class csaAdapter extends CardScrollAdapter
{
@Override
public int findIdPosition(Object id)
{
return -1;
}
@Override
public int findItemPosition(Object item)
{
return sourceCard.indexOf(item);
}
@Override
public int getCount()
{
return sourceCard.size();
}
@Override
public Object getItem(int position)
{
return sourceCard.get(position);
}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
return sourceCard.get(position).toView();
}
}
}
这将导致每次输出相同的cardindex,即0 我尝试使用cvAdapter.findItemPosition()获取位置,但每次都会返回-1.
This results in the same cardindex output every time i.e 0 I tried getting the position with cvAdapter.findItemPosition() but that also returns -1 everytime.
推荐答案
从CardScrollView中实现onClickListener.在其中,您可以确定选择了哪个项目.
Implement the onClickListener from the CardScrollView. Within you'll be able to determine which item was selected.
这篇关于无法获取卡索引的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文