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POandroid fatal exception spinner
 

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  1. POandroid fatal exception spinner
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    <p>I want to get all cities in a asynctask then when the user press on a city i want to get all areas inside that city in another asynctask</p> <p>I tried this:</p> <pre><code>class getAllCities extends AsyncTask&lt;String, Integer, List&lt;City&gt;&gt; { @Override protected void onPostExecute(List&lt;City&gt; result) { super.onPostExecute(result); final String newCities[] = new String[result.size()]; for (int i = 0; i &lt; result.size(); i++) newCities[i] = result.get(i).getName(); cityAdapter = new ArrayAdapter&lt;String&gt;(Address.this, android.R.layout.simple_spinner_item, newCities); cityAdapter .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); s_city.setAdapter(cityAdapter); s_city.setOnItemSelectedListener(new OnItemSelectedListener() { @Override public void onItemSelected(AdapterView&lt;?&gt; arg0, View arg1, int arg2, long arg3) { //Log.d("item", newCities[arg2]); new getAreasInCity(newCities[arg2]).execute("d"); } @Override public void onNothingSelected(AdapterView&lt;?&gt; arg0) { // TODO Auto-generated method stub } }); } @Override protected List&lt;City&gt; doInBackground(String... params) { return City.getAllCities(); } } class getAreasInCity extends AsyncTask&lt;String, Integer, List&lt;Area&gt;&gt; { City city; public getAreasInCity(String cityName) { city = City.getCity(cityName); } @Override protected void onPostExecute(List&lt;Area&gt; result) { super.onPostExecute(result); if(result == null) Log.d("area size = ", "null"); else Log.d("area size = ", result.size()+""); String newArea[] = new String[result.size()]; s_area = (Spinner)findViewById(R.id.s_address_area); areaAdapter = new ArrayAdapter&lt;String&gt;(Address.this, android.R.layout.simple_spinner_item, newArea); areaAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); if(s_area != null){ Log.d("here","saaallllllllllllllllllllll"); areaAdapter.notifyDataSetChanged(); s_area.setAdapter(areaAdapter); } else Log.d("here ", "asedsssssssssssssss"); } @Override protected List&lt;Area&gt; doInBackground(String... params) { return Area.getAreasInCity(city.getID()); } } </code></pre> <p>in the log cat i can see this <code>saaallllllllllllllllllllll</code>, i got this exception:</p> <pre><code>06-07 12:00:18.968: E/AndroidRuntime(25867): FATAL EXCEPTION: main 06-07 12:00:18.968: E/AndroidRuntime(25867): java.lang.NullPointerException 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.widget.ArrayAdapter.createViewFromResource(ArrayAdapter.java:355) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.widget.ArrayAdapter.getView(ArrayAdapter.java:323) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.widget.AbsSpinner.onMeasure(AbsSpinner.java:192) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.view.View.measure(View.java:8462) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:581) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:365) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.view.View.measure(View.java:8462) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3231) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1021) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.widget.LinearLayout.measureVertical(LinearLayout.java:390) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.widget.LinearLayout.onMeasure(LinearLayout.java:313) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.view.View.measure(View.java:8462) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.widget.ScrollView.measureChildWithMargins(ScrollView.java:1086) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.widget.FrameLayout.onMeasure(FrameLayout.java:254) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.widget.ScrollView.onMeasure(ScrollView.java:300) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.view.View.measure(View.java:8462) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3231) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.widget.FrameLayout.onMeasure(FrameLayout.java:254) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.view.View.measure(View.java:8462) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.widget.LinearLayout.measureVertical(LinearLayout.java:535) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.widget.LinearLayout.onMeasure(LinearLayout.java:313) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.view.View.measure(View.java:8462) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3231) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.widget.FrameLayout.onMeasure(FrameLayout.java:254) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.view.View.measure(View.java:8462) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.view.ViewRoot.performTraversals(ViewRoot.java:861) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.view.ViewRoot.handleMessage(ViewRoot.java:1882) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.os.Handler.dispatchMessage(Handler.java:99) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.os.Looper.loop(Looper.java:130) 06-07 12:00:18.968: E/AndroidRuntime(25867): at android.app.ActivityThread.main(ActivityThread.java:3701) 06-07 12:00:18.968: E/AndroidRuntime(25867): at java.lang.reflect.Method.invokeNative(Native Method) 06-07 12:00:18.968: E/AndroidRuntime(25867): at java.lang.reflect.Method.invoke(Method.java:507) 06-07 12:00:18.968: E/AndroidRuntime(25867): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866) 06-07 12:00:18.968: E/AndroidRuntime(25867): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:624) 06-07 12:00:18.968: E/AndroidRuntime(25867): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p><strong>notice when I removed <code>s_area.setAdapter(areaAdapter);</code> the exception goes, but the new spiner becomes empty.</strong></p> <p>any help please</p> <h3>my all code </h3> <pre><code>public class Address extends Activity implements OnClickListener { Spinner s_city, s_area; ArrayAdapter&lt;String&gt; cityAdapter; ArrayAdapter&lt;String&gt; areaAdapter; @Override protected void onCreate(Bundle savedInstanceState) { // TODO Auto-generated method stub super.onCreate(savedInstanceState); setContentView(R.layout.address); getWindow().setSoftInputMode( WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN); initialize(); } String[] cities = new String[0]; String[] areas = new String[0]; private void initialize() { s_city = (Spinner) findViewById(R.id.s_address_city); cityAdapter = new ArrayAdapter&lt;String&gt;(this, android.R.layout.simple_spinner_item, cities); cityAdapter .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); s_city.setAdapter(cityAdapter); s_area = (Spinner) findViewById(R.id.s_address_area); areaAdapter = new ArrayAdapter&lt;String&gt;(this, android.R.layout.simple_spinner_item, areas); s_area.setAdapter(areaAdapter); new getAllCities().execute("city"); } @Override public void onClick(View v) { // TODO Auto-generated method stub switch (v.getId()) { case R.id.b_addItem_save: Intent resultsIntent = new Intent(); resultsIntent.putExtra("City", "Roma"); setResult(RESULT_OK, resultsIntent); finish(); break; default: break; } } class getAllCities extends AsyncTask&lt;String, Integer, List&lt;City&gt;&gt; { @Override protected void onPostExecute(List&lt;City&gt; result) { super.onPostExecute(result); final String newCities[] = new String[result.size()]; for (int i = 0; i &lt; result.size(); i++) newCities[i] = result.get(i).getName(); cityAdapter = new ArrayAdapter&lt;String&gt;(Address.this, android.R.layout.simple_spinner_item, newCities); cityAdapter .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); s_city.setAdapter(cityAdapter); s_city.setOnItemSelectedListener(new OnItemSelectedListener() { @Override public void onItemSelected(AdapterView&lt;?&gt; arg0, View arg1, int arg2, long arg3) { //Log.d("item", newCities[arg2]); new getAreasInCity(newCities[arg2]).execute("d"); } @Override public void onNothingSelected(AdapterView&lt;?&gt; arg0) { // TODO Auto-generated method stub } }); } @Override protected List&lt;City&gt; doInBackground(String... params) { return City.getAllCities(); } } class getAreasInCity extends AsyncTask&lt;String, Integer, List&lt;Area&gt;&gt; { City city; public getAreasInCity(String cityName) { city = City.getCity(cityName); } @Override protected void onPostExecute(List&lt;Area&gt; result) { super.onPostExecute(result); if(result == null) Log.d("area size = ", "null"); else Log.d("area size = ", result.size()+""); String newArea[] = new String[result.size()]; for (int i = 0; i &lt; result.size(); i++) newArea[i] = result.get(i).getName(); areaAdapter = new ArrayAdapter&lt;String&gt;(Address.this, android.R.layout.simple_spinner_item, newArea); areaAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); if(s_area != null){ Log.d("here","saaallllllllllllllllllllll"); areaAdapter.notifyDataSetChanged(); s_area.setAdapter(areaAdapter); } else Log.d("here ", "asedsssssssssssssss"); } @Override protected List&lt;Area&gt; doInBackground(String... params) { return Area.getAreasInCity(city.getID()); } } } </code></pre>
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    1. PO
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      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USSmolina Fezaphitsh
    1. USSmolina Fezaphitsh
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    1. PL
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      1. LTLinked
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
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      1. PTAnswer
    1. VO
      singulars
      1. POandroid fatal exception spinner
      1. This table or related slice is empty.
      1. VTUpMod
    1. COareaAdapter = new ArrayAdapter<String>(Address.this, android.R.layout.simple_spinner_item, newArea);, I think here you are passing wrong context **Address.this**, Please can you post complete code of Address.java file for better understanding to help you.
      singulars
      1. POandroid fatal exception spinner
      1. USvishesh chandra
 

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