如何從一個適合列表項的字符串中抽取一個點擊列表項的列表

Question

好吧，所以我有一個數組適應listview（數組適配是在另一個類中完成）..我只是得到了點擊監聽器爲列表工作，但現在我想要設置它，以便當我點擊一個項目時，它從被點擊的項目中抽取字符串，並將它們附加到新活動的意圖上。我想我應該使用intent.putextra但是我不知道如何拉正確的字符串對應於我點擊..我的代碼是下面的項..即時通訊只是失去了誠實

//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); 
      } 
     }); 

我的警示類..

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我alertsadapter類..

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

讀出值了在週末有關如何解決這個問題的頓悟，我終於找到了一個很好的解決方案，我的應用程序..我知道它不是最優的，因爲我硬編碼數字100，但爲我的用途截至目前，我知道我不會曾經有許多列表項..

我加入的代碼，這兩位我alertsadapter類

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++; 

然後跑到我homepageactivity類，並添加到點擊收聽

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); 

終於走到我的promotionactivity（我在那裏試圖發送的字符串），並將此

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"); 

像一個魅力工作..我希望這可以幫助別人:)

Answer 2

您需要使用onItemClick事件的參數

與PARAM名全更可讀的PARAM枚舉是

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

這意味着您有指示適配器中位置的參數pos。

，你所要做的是：

• 跳轉到pos在適配器
• 從適配器
• 使用putExtra上申請的意圖