[android-developers] To display Listview using JSON in Android !

This is my code. Listview using Json in Android . But my lists is not displaying when i click a button.. Only displaying first activity alone. Whats wrong here ? can anyone help me ..

try {

     JSONObject json1=new JSONObject(resultJSON);

     JSONArray jsonArray=json1.getJSONArray("");

     int length = jsonArray.length();

     System.out.println("json1:"+json1);

     System.out.println("jsonarray:"+jsonArray);

     String[] str1 = new String[length];

     for (int i = 0; i < str1.length; i++) {

str1[i]=jsonArray.getJSONObject(i).getJSONObject("FORM").getJSONArray("FPROP".getJSONObject(0).getString("FNAME");

     

}

} catch (Exception e) {

// TODO: handle exception

Toast.makeText(NewActivity.this,"sorry", Toast.LENGTH_LONG).show();

}

 ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, android.R.id.text1,str1);

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