Example usage for android.widget TextView setLayerType

Introduction

In this page you can find the example usage for android.widget TextView setLayerType.

Prototype

public void setLayerType(int layerType, @Nullable Paint paint) 

Source Link

Document

Specifies the type of layer backing this view.

Usage

From source file:com.hctrom.romcontrol.licenseadapter.LicenseDialogoAlerta.java

public void applyBlurMaskFilter(TextView tv, BlurMaskFilter.Blur style) {
    /*/*from w  ww  .  j a va 2 s.c om*/
    MaskFilter
        Known Direct Subclasses
            BlurMaskFilter, EmbossMaskFilter
            
        MaskFilter is the base class for object that perform transformations on an
        alpha-channel mask before drawing it. A subclass of MaskFilter may be installed
        into a Paint. Blur and emboss are implemented as subclasses of MaskFilter.
            
    */
    /*
    BlurMaskFilter
        This takes a mask, and blurs its edge by the specified radius. Whether or or not to
        include the original mask, and whether the blur goes outside, inside, or straddles,
        the original mask's border, is controlled by the Blur enum.
    */
    /*
    public BlurMaskFilter (float radius, BlurMaskFilter.Blur style)
        Create a blur maskfilter.
            
    Parameters
        radius : The radius to extend the blur from the original mask. Must be > 0.
        style : The Blur to use
    Returns
        The new blur maskfilter
    */
    /*
    BlurMaskFilter.Blur
        INNER : Blur inside the border, draw nothing outside.
        NORMAL : Blur inside and outside the original border.
        OUTER : Draw nothing inside the border, blur outside.
        SOLID : Draw solid inside the border, blur outside.
    */
    /*
    public float getTextSize ()
        Returns the size (in pixels) of the default text size in this TextView.
    */

    // Define the blur effect radius
    float radius = tv.getTextSize() / 10;

    // Initialize a new BlurMaskFilter instance
    BlurMaskFilter filter = new BlurMaskFilter(radius, style);

    /*
    public void setLayerType (int layerType, Paint paint)
        Specifies the type of layer backing this view. The layer can be LAYER_TYPE_NONE,
        LAYER_TYPE_SOFTWARE or LAYER_TYPE_HARDWARE.
            
        A layer is associated with an optional Paint instance that controls how the
        layer is composed on screen.
            
    Parameters
        layerType : The type of layer to use with this view, must be one of
            LAYER_TYPE_NONE, LAYER_TYPE_SOFTWARE or LAYER_TYPE_HARDWARE
        paint : The paint used to compose the layer. This argument is optional and
            can be null. It is ignored when the layer type is LAYER_TYPE_NONE
    */
    /*
    public static final int LAYER_TYPE_SOFTWARE
        Indicates that the view has a software layer. A software layer is backed by
        a bitmap and causes the view to be rendered using Android's software rendering
        pipeline, even if hardware acceleration is enabled.
    */

    // Set the TextView layer type
    tv.setLayerType(View.LAYER_TYPE_SOFTWARE, null);

    /*
    public MaskFilter setMaskFilter (MaskFilter maskfilter)
        Set or clear the maskfilter object.
            
        Pass null to clear any previous maskfilter. As a convenience, the parameter
        passed is also returned.
            
    Parameters
        maskfilter : May be null. The maskfilter to be installed in the paint
    Returns
        maskfilter
    */

    // Finally, apply the blur effect on TextView text
    tv.getPaint().setMaskFilter(filter);
}

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