Question

好吧所以我有一个数组适应列表视图（数组适应在另一个类中完成）..我只是让点击监听器工作的列表，但现在我想要设置它，以便当我点击一个项目，它拉来自点击项目的字符串，并将它们捎带在一个新活动的意图上..我想我应该使用intent.putextra但是我不知道如何拉出对应于我点击的项目的正确字符串..我的代码在下面..我只是丢了老实说

//Initialize the ListView
        lstTest = (ListView)findViewById(R.id.lstText);

         //Initialize the ArrayList
        alrts = new ArrayList<Alerts>();

        //Initialize the array adapter notice with the listitems.xml layout
        arrayAdapter = new AlertsAdapter(this, R.layout.listitems,alrts);

        //Set the above adapter as the adapter for the list
        lstTest.setAdapter(arrayAdapter);

        //Set the click listener for the list
        lstTest.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            public void onItemClick(AdapterView adapterView, View view, int item, long arg3) {
                Intent intent = new Intent(
                        HomePageActivity.this,
                        PromotionActivity.class
                        );
                finish();
                startActivity(intent);
            }
        });

我的警报课..

public class Alerts {

public String cityid;
public String promoterid;
public String promoshortcontent;
public String promocontent;
public String promotitle;
public String locationid;
public String cover;

@Override
public String toString() {
    return "City: " +cityid+ " Promoter: " +promoterid+ "Short Promotion: " +promoshortcontent+ "Promotion: " +promocontent+ "Title: " +promotitle+ "Location: " +locationid+ "Cover: " +cover+ "$";
}

}

anddddd my alertsadapter class ..

public class AlertsAdapter extends ArrayAdapter<Alerts> {

int resource;
String response;
Context context;
//Initialize adapter
public AlertsAdapter(Context context, int resource, List<Alerts> items) {
    super(context, resource, items);
    this.resource=resource;

}

@Override
public View getView(int position, View convertView, ViewGroup parent)
{
    LinearLayout alertView;
    //Get the current alert object
    Alerts al = getItem(position);

    //Inflate the view
    if(convertView==null)
    {
        alertView = new LinearLayout(getContext());
        String inflater = Context.LAYOUT_INFLATER_SERVICE;
        LayoutInflater vi;
        vi = (LayoutInflater)getContext().getSystemService(inflater);
        vi.inflate(resource, alertView, true);
    }
    else
    {
        alertView = (LinearLayout) convertView;
    }
    //Get the text boxes from the listitem.xml file
    TextView textPromo =(TextView)alertView.findViewById(R.id.txtPromo);
    TextView textPromoter =(TextView)alertView.findViewById(R.id.txtPromoter);
    TextView textLocation =(TextView)alertView.findViewById(R.id.txtLocation);

    //Assign the appropriate data from our alert object above
    textPromo.setText(al.promocontent);
    textPromoter.setText(al.promoterid);
    textLocation.setText(al.locationid);

    return alertView;
}

}

Answer 1

您需要使用onItemClick事件的参数

具有参数名称的完整更具可读性的参数枚举

(AdapterView<?> parent, View view, int pos, long id)

这意味着你有pos参数指示适配器中的位置。

你要做的是：

跳转到适配器中的pos
读取适配器的值
使用putExtra注册意图

Answer 2

周末有一个关于如何解决这个问题的顿悟，我终于找到了一个很好的解决我的应用程序..我知道它不是最佳的，因为我硬编码数字100到它但我的用途截至现在我知道我不会有那么多的清单项目..

我将这2位代码添加到我的alertsadapter类

int startzero = 0;

public static String[][] promomatrix = new String[6][100];

和

promomatrix [0] [startzero] = al.cityid; promomatrix [1] [startzero] = al.promoterid; promomatrix [2] [startzero] = al.promocontent; promomatrix [3] [startzero] = al.promotitle; promomatrix [4] [startzero] = al.locationid; promomatrix [5] [startzero] = al.cover;

    startzero++;

然后转到我的homepageactivity类并将其添加到点击监听器

Intent intent = new Intent(
                        HomePageActivity.this,PromotionActivity.class);

                intent.putExtra("listitemcity", AlertsAdapter.promomatrix[0][pos]);
                intent.putExtra("listitempromoter", AlertsAdapter.promomatrix[1][pos]);
                intent.putExtra("listitemcontent", AlertsAdapter.promomatrix[2][pos]);
                intent.putExtra("listitemtitle", AlertsAdapter.promomatrix[3][pos]);
                intent.putExtra("listitemlocation", AlertsAdapter.promomatrix[4][pos]);
                intent.putExtra("listitemcover", AlertsAdapter.promomatrix[5][pos]);

                finish();
                startActivity(intent);

最后去了我的promotionactivity（我试图发送字符串）并添加了这个

Bundle extras = getIntent().getExtras();
        if (extras == null){
            return;
        }
        String listitemcity = extras.getString("listitemcity");
        String listitempromoter = extras.getString("listitempromoter");
        String listitemcontent = extras.getString("listitemcontent");
        String listitemtitle = extras.getString("listitemtitle");
        String listitemlocation = extras.getString("listitemlocation");
        String listitemcover = extras.getString("listitemcover");

像魅力一样工作..我希望这有助于某人：）

如何从单击列表项的数组适配列表视图中提取字符串

2 个答案: