textView.setAllCaps() backward compatibility below ICS

AllCapsTransformationMethodCompat.java

public class AllCapsMethodTransformationCompat implements TransformationMethod {

    private static AllCapsMethodTransformationCompat sInstance;
    private static AllCapsMethodTransformationCompat sKeepOriginalInstance;
    private boolean mAllCaps = false;
    private String mOriginalString;

    public AllCapsMethodTransformationCompat(String string) {
        mOriginalString = string;
    }

    public AllCapsMethodTransformationCompat() {
        mAllCaps = true;
    }

    public static AllCapsMethodTransformationCompat getInstance(){
        if(sInstance == null){
            sInstance = new AllCapsMethodTransformationCompat();
        }
        return sInstance;
    }

    private static TransformationMethod getInstance(String string) {
        if(sKeepOriginalInstance == null){
            sKeepOriginalInstance = new AllCapsMethodTransformationCompat(string);
        }
        return sInstance;
    }
    @Override
    public CharSequence getTransformation(CharSequence source, View view) {
        return !TextUtils.isEmpty(source) && mAllCaps
                ?
                source.toString().toUpperCase(view.getContext().getResources().getConfiguration().locale)
                : keepOriginal()? mOriginalString :
                source;
    }

    private boolean keepOriginal() {
        return  !TextUtils.isEmpty(mOriginalString) && !mAllCaps;
    }

    @Override
    public void onFocusChanged(View view, CharSequence sourceText,
                               boolean focused, int direction, Rect previouslyFocusedRect) {
        // TODO Auto-generated method stub

    }
    public static void setAllCaps(TextView textView, boolean allCaps) {
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH){
            textView.setAllCaps(allCaps);
        }else{
            textView.setTransformationMethod(allCaps ? getInstance() : null);
        }
    }
  //---Usage
    public static void setAllCaps(TextView textView, int stringResId, boolean allCaps) {
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH){
            textView.setAllCaps(allCaps);
        }else{
            textView.setTransformationMethod(allCaps ? getInstance() : getInstance(textView.getContext().getString(stringResId)));
        }
    }

    public static void setAllCaps(TextView textView, String string, boolean allCaps) {
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH){
            textView.setAllCaps(allCaps);
        }else{
            textView.setTransformationMethod(allCaps ? getInstance() : getInstance(string));
        }
    }
}