title: android: getResources().getIdentifier NotFound Exception
body: <p>I get my Data via json. Put it in a Hashmap und list it in a ListView.
  That works fine!</p>
  
  <p>Now I want something like this:</p>
  
  <pre><code>String myArt=report_TJ_+e.getString("artID");
  </code></pre>
  
  <p>That does not work in my combination. Here is my Code:</p>
  
  <pre><code>  try{
      //String text = getString(R.string.report_TJ);
      JSONArray  earthquakes = json.getJSONArray("uTraf");
      mylist.clear();
      String report_TJ_btn = null;
              for(int i=0;i&lt;earthquakes.length();i++){                        
                  HashMap&lt;String, String&gt; map = new HashMap&lt;String, String&gt;();    
                  JSONObject e = earthquakes.getJSONObject(i);
  
                  String imageString=report_TJ_btn+e.getString("artID");
                  String myArt = getString(getResources().getIdentifier(imageString, "", getPackageName()));
  
                  map.put("id",  String.valueOf(i));
                  map.put("first", myArt + "Stau: " + e.getString("road") + ", " + e.getString("county"));
                  map.put("second", e.getString("timestamp") + ", " + e.getString("suburb"));
                  mylist.add(map);
              }       
    }
  </code></pre>
  
  <p>Error:
  E/AndroidRuntime(641): Caused by: android.content.res.Resources$NotFoundException: String resource ID #0x0</p>