Jedes mal Fehler und App stürzt ab

10-01 20:03:37.770  30147-30147/com.example.p.sql E/AndroidRuntime FATAL EXCEPTION: main
    Process: com.example.p.sql, PID: 30147
    java.lang.NullPointerException
            at com.example.p.sql.MyActivity.setTextToTextView(MyActivity.java:33)
            at com.example.p.sql.MyActivity$GetAllNewsTask.onPostExecute(MyActivity.java:66)
            at com.example.p.sql.MyActivity$GetAllNewsTask.onPostExecute(MyActivity.java:53)
            at android.os.AsyncTask.finish(AsyncTask.java:632)
            at android.os.AsyncTask.access$600(AsyncTask.java:177)
            at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:645)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5139)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:796)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:612)
            at dalvik.system.NativeStart.main(Native Method)

public class MyActivity extends ActionBarActivity {

    private TextView responseTextView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);

        this.responseTextView = (TextView) this.findViewById(R.id.responseTextView);

        new GetAllNewsTask().execute(new ApiConnector());

    }

    public void setTextToTextView(JSONArray jsonArray)
    {
        String s  = "";
        for(int i=0; i<jsonArray.length();i++){

            JSONObject json = null;
            try {
                json = jsonArray.getJSONObject(i);
                s = s +
                        "Titel : "+json.getString("title")+"\n"
                        +json.getString("news")+"\n"+
                        "ID : "+json.getInt("id")+"\n"+
                        "IMG Link : "+json.getString("img")+"\n\n";
            } catch (JSONException e) {
                e.printStackTrace();
            }

        }

        this.responseTextView.setText(s);

    }

    private class GetAllNewsTask extends AsyncTask<ApiConnector,Long,JSONArray>
    {
        @Override
        protected JSONArray doInBackground(ApiConnector... params) {

            // it is executed on Background thread

            return params[0].GetAllNews();
        }

        @Override
        protected void onPostExecute(JSONArray jsonArray) {

            setTextToTextView(jsonArray);


        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.my, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

            setTextToTextView(jsonArray);

public class ApiConnector {

    public JSONArray GetAllNews(){

        //link zur php Datei die alle News aus der DB ausliest
        String url = "http://192.168.2.118/apptest/GetAllNews.php";

        // Get HttpResponse Object from url.
        // Get HttpEntity from Http Response Object

        HttpEntity httpEntity = null;

        try
        {

            DefaultHttpClient httpClient = new DefaultHttpClient();  // Default HttpClient
            HttpGet httpGet = new HttpGet(url);

            HttpResponse httpResponse = httpClient.execute(httpGet);

            httpEntity = httpResponse.getEntity();

        } catch (ClientProtocolException e) {

            // Signals error in http protocol
            e.printStackTrace();

            //Log Errors Here


        } catch (IOException e) {
            e.printStackTrace();
        }


        // Convert HttpEntity into JSON Array
        JSONArray jsonArray = null;

        if (httpEntity != null) {
            try {
                String entityResponse = EntityUtils.toString(httpEntity);

                Log.e("Entity Response  : ", entityResponse);

                jsonArray = new JSONArray(entityResponse);

            } catch (JSONException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        return jsonArray;

    }

}

10-01 21:39:48.265    2446-2467/com.example.p.sql E/Entity Response  : [ 10-01 21:39:48.265  2446: 2467 W/System.err ]
    org.json.JSONException: End of input at character 0 of

W/System.err org.json.JSONException: Value {"img":"Testbild","id":55,"news":"Testtitelnews","title":"testTitel"} of type org.json.JSONObject cannot be converted to JSONArray

{"img":"Testbild","id":55,"news":"Testtitelnews","title":"testTitel"}