Question

API Level: 12 (Android 3.1)

App Background: Through my Android app I am sending a request to our web servers MySQL database to retrieve companies. All of that works fine. Originally I had the returned data populate a ListView, but to get the visual my boss prefers I have 6 TextView‘s evenly distributed. (This app is designed to only work on ONE device, the Samsung Galaxy Tab 10.1)

Question: So, in parsing the returned data I have a for loop. What I would like to do, is auto increment a variable i.e. company_ + i then i++. Is this possible in Java or is there a better way?

Here is an example of how I would think it would work:

int length = 5;

//parse JSON data
try{
    JSONArray jArray = new JSONArray(result);
    for(int i=0; i < length; i++){

        TextView company = (TextView)findViewById(R.id.company_ + i);

        JSONObject jObject = jArray.getJSONObject(i);
            String businessName = jObject.getString("businessName");
            double distance = jObject.getDouble("distance");

            double distRound = 1e5;
            double roDistance = Math.round(distance * distRound) / distRound;

            company.setText(businessName);
            company.append(Html.fromHtml("<br>"));
            company.append("Approximate distance:   " + roDistance + " feet.");

---

Error Thrown: The operator + is undefined for the argument type(s) TextView, int. Which makes sense, however I am used to working in PHP where I do this often.

---

Here is my layout:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/location_select"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <LinearLayout
        android:id="@+id/row_2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:weightSum="2" >

        <TextView
            android:id="@+id/company_1"
            android:layout_width="0dp"
            android:layout_height="200dp"
            android:layout_gravity="top|left"
            android:layout_weight="1"
            android:textIsSelectable="true"
            android:textSize="25sp" />

        <TextView
            android:id="@+id/company_2"
            android:layout_width="0dp"
            android:layout_height="200dp"
            android:layout_gravity="top|right"
            android:layout_marginTop="0dp"
            android:layout_weight="1"
            android:textIsSelectable="true"
            android:textSize="25sp" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/row_3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:weightSum="2"
        android:layout_below="@id/row_2" >

        <TextView
            android:id="@+id/company_3"
            android:layout_width="0dp"
            android:layout_height="200dp"
            android:layout_gravity="bottom|left"
            android:layout_marginLeft="0dp"
            android:layout_weight="1"
            android:textIsSelectable="true"
            android:textSize="25sp" />

        <TextView
            android:id="@+id/company_4"
            android:layout_width="0dp"
            android:layout_height="200dp"
            android:layout_gravity="bottom|right"
            android:layout_marginRight="0dp"
            android:layout_weight="1"
            android:textIsSelectable="true"
            android:textSize="25sp" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/row_4"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:weightSum="2"
        android:layout_below="@id/row_3" >

        <TextView
            android:id="@+id/company_5"
            android:layout_width="0dp"
            android:layout_height="200dp"
            android:layout_gravity="bottom|left"
            android:layout_marginLeft="0dp"
            android:layout_weight="1"
            android:textIsSelectable="true"
            android:textSize="25sp" />

        <TextView
            android:id="@+id/next_5"
            android:layout_width="0dp"
            android:layout_height="200dp"
            android:layout_gravity="bottom|right"
            android:layout_marginRight="0dp"
            android:layout_weight="1"
            android:textIsSelectable="true"
            android:textSize="25sp" />
    </LinearLayout>

</RelativeLayout>

Answer 1

If Textview remains constant, then you can do this..

int[] companyIds = { R.id.company_id_1,
        R.id.company_id_2, R.id.company_id_3,...};

and in code do this

TextView company_select = (TextView)findViewById(companyIds[i]);