如何從tabhost內部的活動中查找tabhost內的視圖的viewviewid？

我試圖檢索一個視圖，但它一直返回null，我怎麼找到它？如何從tabhost內部的活動中查找tabhost內的視圖的viewviewid？

public class TripDailyItinerary extends Activity { 
ViewGroup layout; 
View v; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
// TODO Auto-generated method stub 
super.onCreate(savedInstanceState); 
setContentView(R.layout.html_content); 
TextView content = (TextView) findViewById(R.id.htmlContent); 
layout = (ViewGroup) findViewById(R.layout.trip_content); 
v = (View) layout.findViewById(R.id.bg); //where the error is 


JSONObject reservation; 
int resNumber = ((MyApp) this.getApplication()).getResNum(); 
String dailyitinerary = ""; 

try { 
reservation = ((MyApp) this.getApplication()).getJSON().getJSONObject("response").getJSONArray("reservations").getJSONObject(resNumber); 
dailyitinerary = reservation.getString("dailyitinerary"); 
} catch (JSONException e) { 
// TODO Auto-generated catch block 
e.printStackTrace(); 
} 
content.setText(Html.fromHtml(dailyitinerary)); 
} 

}

我保持在V =（視圖）獲取一個NullPointerException ....等

來源

2012-04-05 JMarsh

分享你的代碼.. – 2012-04-05 05:25:35

你需要在layout中正確檢查你的viewId。分享代碼並縮短問題描述，因爲它甚至比實際的問題更大。 – Sankalp 2012-04-05 05:31:36

發表了一些代碼... – 2012-04-05 05:33:15

layout = (ViewGroup) findViewById(R.layout.trip_content); 
v = (View) layout.findViewById(R.id.bg); //where the error is

下面

LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
view view = inflater.inflate(R.layout.R.layout.trip_content,null); 
TextView name = (TextView) view.findViewById(R.id.bg);

也TextView的可更換更換上述兩個線與您的控制ImageView和任何其他。

來源

2012-04-05 05:59:11

使用此：

ViewGroup parent = (ViewGroup)findViewById(R.id.trip_layout); 
LayoutInflater inflater = (LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
View myView = inflater.inflate(R.layout.trip_content,parent);

如果你想添加的TextView

TextView content = (TextView)myView.findViewById(R.id.htmlContent);

因爲null使得警告..

R.id.trip_layout是你的XML佈局的父佈局。

來源

2015-08-25 11:52:37 reegan29

如何從tabhost內部的活動中查找tabhost內的視圖的viewviewid？

回答

相關問題