Question

I’ve been trying to create a simple class that implements the ViewSwitcher.ViewFactory interface basing on the project developed in “Sams Teach Yourself Android Application Development in 24 Hours”. In the example the makeView() method inflates a layout in order to obtain a View. However, I wanted to do it programmatically and it didn’t work.

The onCreate() method of the activity looks like this:

private TextSwitcher mQuestionText;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.game);

    mQuestionText = (TextSwitcher) findViewById(R.id.MyTextSwitcher);
    mQuestionText.setFactory(new MyTextSwitcherFactory());
    mQuestionText.setCurrentText("blablabla");
}

The proposed solution goes like this:

private class MyTextSwitcherFactory implements ViewSwitcher.ViewFactory {
    public View makeView() {
        TextView textView = (TextView) LayoutInflater.from(
        getApplicationContext()).inflate(
        R.layout.text_switcher_view,
        mQuestionText, false);
        return textView;
    }
}

The resource file is:

<?xml version="1.0" encoding="utf-8"?>
<TextView
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:textColor="@color/title_color"
    android:textSize="@dimen/game_question_size"
    android:gravity="center"
    android:text="Testing String"
    android:layout_height="match_parent"
    android:padding="10dp">
</TextView>

While I wanted to it like this:

private class MyImageSwitcherFactory implements ViewSwitcher.ViewFactory {
    public View makeView() {
        TextView textView = new TextView(getApplicationContext());
        textView.setLayoutParams(new TextSwitcher.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
        textView.setTextColor(R.color.title_color);
        textView.setTextSize(R.dimen.game_question_size);
        textView.setGravity(Gravity.CENTER);
        textView.setText("Test");
            return textView;
    }
}

I get the “blablabla” text displayed when I use the inflate method but not doing it programmatically. Could you point to an error in my code, please?

Answer 1

I found out what was wrong with the code I provided. This is wrong since it gives the ID of the resource as the function parameter instead of the value itself.

textView.setTextColor(R.color.title_color);
textView.setTextSize(R.dimen.game_question_size);

This is correct:

textView.setTextColor(getApplicationContext().getResources().getColor(R.color.title_color));
textView.setTextSize(TypedValue.COMPLEX_UNIT_PX, getApplicationContext().getResources().getDimension(R.dimen.game_question_size));