Java Code Examples for android.util.TypedValue#complexToDimensionPixelOffset()

/**
 * Retrieve a dimensional unit attribute at <var>index</var> for use
 * as an offset in raw pixels.  This is the same as
 * {@link #getDimension}, except the returned value is converted to
 * integer pixels for you.  An offset conversion involves simply
 * truncating the base value to an integer.
 * <p>
 * This method will throw an exception if the attribute is defined but is
 * not a dimension.
 *
 * @param index Index of attribute to retrieve.
 * @param defValue Value to return if the attribute is not defined or
 *                 not a resource.
 *
 * @return Attribute dimension value multiplied by the appropriate
 *         metric and truncated to integer pixels, or defValue if not defined.
 * @throws RuntimeException if the TypedArray has already been recycled.
 * @throws UnsupportedOperationException if the attribute is defined but is
 *         not an integer.
 *
 * @see #getDimension
 * @see #getDimensionPixelSize
 */
public int getDimensionPixelOffset(@StyleableRes int index, int defValue) {
    if (mRecycled) {
        throw new RuntimeException("Cannot make calls to a recycled instance!");
    }

    final int attrIndex = index;
    index *= STYLE_NUM_ENTRIES;

    final int[] data = mData;
    final int type = data[index + STYLE_TYPE];
    if (type == TypedValue.TYPE_NULL) {
        return defValue;
    } else if (type == TypedValue.TYPE_DIMENSION) {
        return TypedValue.complexToDimensionPixelOffset(data[index + STYLE_DATA], mMetrics);
    } else if (type == TypedValue.TYPE_ATTRIBUTE) {
        final TypedValue value = mValue;
        getValueAt(index, value);
        throw new UnsupportedOperationException(
                "Failed to resolve attribute at index " + attrIndex + ": " + value);
    }

    throw new UnsupportedOperationException("Can't convert value at index " + attrIndex
            + " to dimension: type=0x" + Integer.toHexString(type));
}
 

/**
 * Retrieve a dimensional for a particular resource ID for use
 * as an offset in raw pixels.  This is the same as
 * {@link #getDimension}, except the returned value is converted to
 * integer pixels for you.  An offset conversion involves simply
 * truncating the base value to an integer.
 * 
 * @param id The desired resource identifier, as generated by the aapt
 *           tool. This integer encodes the package, type, and resource
 *           entry. The value 0 is an invalid identifier.
 * 
 * @return Resource dimension value multiplied by the appropriate 
 * metric and truncated to integer pixels.
 * 
 * @throws NotFoundException Throws NotFoundException if the given ID does not exist.
 *
 * @see #getDimension
 * @see #getDimensionPixelSize
 */
public int getDimensionPixelOffset(@DimenRes int id) throws NotFoundException {
    final TypedValue value = obtainTempTypedValue();
    try {
        final ResourcesImpl impl = mResourcesImpl;
        impl.getValue(id, value, true);
        if (value.type == TypedValue.TYPE_DIMENSION) {
            return TypedValue.complexToDimensionPixelOffset(value.data,
                    impl.getDisplayMetrics());
        }
        throw new NotFoundException("Resource ID #0x" + Integer.toHexString(id)
                + " type #0x" + Integer.toHexString(value.type) + " is not valid");
    } finally {
        releaseTempTypedValue(value);
    }
}
 

public static int complexToDimensionPixelOffset(int data) {
    return TypedValue.complexToDimensionPixelOffset(data, Base.getDisplayMetrics());
}