Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

import android.content.res.Resources;
import android.graphics.Color;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.GradientDrawable;

import android.util.TypedValue;
import android.view.View;

public class Main {
    public static final int TRANSPARENT = 0;

    /**
     * Set the background of a {@link android.view.View} to the specified color, with a darker version of the
     * color as a border.
     */
    public static void setViewBackground(View view, int color) {
        Resources r = view.getResources();

        Drawable currentDrawable = view.getBackground();
        GradientDrawable backgroundDrawable;
        if (currentDrawable != null && currentDrawable instanceof GradientDrawable) {
            // Reuse drawable
            backgroundDrawable = (GradientDrawable) currentDrawable;
        } else {
            backgroundDrawable = new GradientDrawable();
        }

        int darkenedColor = darkenColor(color);

        backgroundDrawable.setColor(color);
        backgroundDrawable.setStroke(
                (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 1, r.getDisplayMetrics()),
                darkenedColor);

        view.setBackgroundDrawable(backgroundDrawable);
    }

    /**
     * Returns a darker version of the specified color. Returns a translucent gray for transparent colors.
     */
    private static int darkenColor(int color) {
        if (color == TRANSPARENT) {
            return Color.argb(127, 127, 127, 127);
        }
        return Color.rgb(Color.red(color) * 192 / 256, Color.green(color) * 192 / 256,
                Color.blue(color) * 192 / 256);
    }
}