custom layout attribute loading

attrs.xml

  <declare-styleable name="FloatLabelLayout">
    <attr name="floatLabelTextAppearance" format="reference" />
    <attr name="floatLabelSidePadding" format="reference|dimension" />
  </declare-styleable>

FloatView

public final class FloatLabelLayout extends FrameLayout {
 
    private static final long ANIMATION_DURATION = 150;
 
    private static final float DEFAULT_PADDING_LEFT_RIGHT_DP = 12f;
 
    private EditText mEditText;
    private TextView mLabel;
 
    public FloatLabelLayout(Context context) {
        this(context, null);
    }
 
    public FloatLabelLayout(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }
 
    public FloatLabelLayout(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
 
        final TypedArray a = context
                .obtainStyledAttributes(attrs, R.styleable.FloatLabelLayout);
 
        final int sidePadding = a.getDimensionPixelSize(
                R.styleable.FloatLabelLayout_floatLabelSidePadding,
                dipsToPix(DEFAULT_PADDING_LEFT_RIGHT_DP));
        mLabel = new TextView(context);
        mLabel.setPadding(sidePadding, 0, sidePadding, 0);
        mLabel.setVisibility(INVISIBLE);
 
        mLabel.setTextAppearance(context,
                a.getResourceId(R.styleable.FloatLabelLayout_floatLabelTextAppearance,
                        android.R.style.TextAppearance_Small));
 
        addView(mLabel, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
 
        a.recycle();
    }

layout.xml

    <com.novoda.dch.view.FloatLabelLayout
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      app:floatLabelTextAppearance="@style/dch_FloatLabel">