Question

I have an Android activity with eight TextViews, named tvStat1, tvStat2, …, tvStat8. I have a function that takes an integer as a parameter. What I want to do is something like this:

public void incrementScore(int StatisticCategory){
    String s "R.id.tvStat" + String.ValueOf(StatisticCategory);
    TextView tvGeneric = (TextView)findViewById(s);
    // ... do something with the text in the generic TextView...
}

But of course, this doesn’t work, since the findViewById method only takes an integer as a parameter, and as such doesn’t like my way of identifying a generic TextView based on an incoming parameter. Since I only have eight TextViews, it isn’t too much effort to write a switch statement… but I think there’s got to be a better way. Any ideas?

Answer 1

You can use ViewGroup.getChildCount() and ViewGroup.getChildAt(). Here is an exmple.

---

Assuming you have layout:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >

    <LinearLayout 
        android:id="@+id/text_group"
        android:orientation="vertical"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">

        <TextView  
            android:layout_width="fill_parent" 
            android:layout_height="wrap_content"   />

        <TextView  
            android:layout_width="fill_parent" 
            android:layout_height="wrap_content"   />

        <TextView  
            android:layout_width="fill_parent" 
            android:layout_height="wrap_content"   />

        <TextView  
            android:layout_width="fill_parent" 
            android:layout_height="wrap_content"   />

     </LinearLayout>
</LinearLayout>

You can use next code to assign text to TextViews:

@Override
public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    LinearLayout textGroup = (LinearLayout)findViewById(R.id.text_group);

    for(int i = 0; i < textGroup.getChildCount(); i++)
    {
        TextView text = (TextView)textGroup.getChildAt(i);
        text.setText("This is child #"+i);
    }

}