Generate And Set Random Colors On Text View Background Within Recycler View In Android

October 18, 2022 Post a Comment

I am Trying to Generate Random Colors and set the Random color as background of Text View Just Like in GMail app. The Text view is Having a circular background initially set in xml

Solution 1:

Random r = new Random();
    int red=r.nextInt(255 - 0 + 1)+0;
    int green=r.nextInt(255 - 0 + 1)+0;
    int blue=r.nextInt(255 - 0 + 1)+0;

    GradientDrawable draw = new GradientDrawable();
    draw.setShape(GradientDrawable.OVAL);
    draw.setColor(Color.rgb(red,green,blue));
    mTextView.setBackground(draw);

Solution 2:

//  google's material design colours from    , 254 colors
//  http://www.google.com/design/spec/style/color.html#color-ui-color-palette

public String[] mColors = {
        "FFEBEE", "FFCDD2", "EF9A9A", "E57373", "EF5350", "F44336", "E53935",        //reds
        "D32F2F", "C62828", "B71C1C", "FF8A80", "FF5252", "FF1744", "D50000",
        "FCE4EC", "F8BBD0", "F48FB1", "F06292", "EC407A", "E91E63", "D81B60",        //pinks
        "C2185B", "AD1457", "880E4F", "FF80AB", "FF4081", "F50057", "C51162",
        "F3E5F5", "E1BEE7", "CE93D8", "BA68C8", "AB47BC", "9C27B0", "8E24AA",        //purples
        "7B1FA2", "6A1B9A", "4A148C", "EA80FC", "E040FB", "D500F9", "AA00FF",
        "EDE7F6", "D1C4E9", "B39DDB", "9575CD", "7E57C2", "673AB7", "5E35B1",        //deep purples
        "512DA8", "4527A0", "311B92", "B388FF", "7C4DFF", "651FFF", "6200EA",
        "E8EAF6", "C5CAE9", "9FA8DA", "7986CB", "5C6BC0", "3F51B5", "3949AB",        //indigo
        "303F9F", "283593", "1A237E", "8C9EFF", "536DFE", "3D5AFE", "304FFE",
        "E3F2FD", "BBDEFB", "90CAF9", "64B5F6", "42A5F5", "2196F3", "1E88E5",        //blue
        "1976D2", "1565C0", "0D47A1", "82B1FF", "448AFF", "2979FF", "2962FF",
        "E1F5FE", "B3E5FC", "81D4fA", "4fC3F7", "29B6FC", "03A9F4", "039BE5",        //light blue
        "0288D1", "0277BD", "01579B", "80D8FF", "40C4FF", "00B0FF", "0091EA",
        "E0F7FA", "B2EBF2", "80DEEA", "4DD0E1", "26C6DA", "00BCD4", "00ACC1",        //cyan
        "0097A7", "00838F", "006064", "84FFFF", "18FFFF", "00E5FF", "00B8D4",
        "E0F2F1", "B2DFDB", "80CBC4", "4DB6AC", "26A69A", "009688", "00897B",        //teal
        "00796B", "00695C", "004D40", "A7FFEB", "64FFDA", "1DE9B6", "00BFA5",
        "E8F5E9", "C8E6C9", "A5D6A7", "81C784", "66BB6A", "4CAF50", "43A047",        //green
        "388E3C", "2E7D32", "1B5E20", "B9F6CA", "69F0AE", "00E676", "00C853",
        "F1F8E9", "DCEDC8", "C5E1A5", "AED581", "9CCC65", "8BC34A", "7CB342",        //light green
        "689F38", "558B2F", "33691E", "CCFF90", "B2FF59", "76FF03", "64DD17",
        "F9FBE7", "F0F4C3", "E6EE9C", "DCE775", "D4E157", "CDDC39", "C0CA33",        //lime
        "A4B42B", "9E9D24", "827717", "F4FF81", "EEFF41", "C6FF00", "AEEA00",
        "FFFDE7", "FFF9C4", "FFF590", "FFF176", "FFEE58", "FFEB3B", "FDD835",        //yellow
        "FBC02D", "F9A825", "F57F17", "FFFF82", "FFFF00", "FFEA00", "FFD600",
        "FFF8E1", "FFECB3", "FFE082", "FFD54F", "FFCA28", "FFC107", "FFB300",        //amber
        "FFA000", "FF8F00", "FF6F00", "FFE57F", "FFD740", "FFC400", "FFAB00",
        "FFF3E0", "FFE0B2", "FFCC80", "FFB74D", "FFA726", "FF9800", "FB8C00",        //orange
        "F57C00", "EF6C00", "E65100", "FFD180", "FFAB40", "FF9100", "FF6D00",
        "FBE9A7", "FFCCBC", "FFAB91", "FF8A65", "FF7043", "FF5722", "F4511E",        //deep orange
        "E64A19", "D84315", "BF360C", "FF9E80", "FF6E40", "FF3D00", "DD2600",
        "EFEBE9", "D7CCC8", "BCAAA4", "A1887F", "8D6E63", "795548", "6D4C41",        //brown
        "5D4037", "4E342E", "3E2723",
        "FAFAFA", "F5F5F5", "EEEEEE", "E0E0E0", "BDBDBD", "9E9E9E", "757575",        //grey
        "616161", "424242", "212121",
        "ECEFF1", "CFD8DC", "B0BBC5", "90A4AE", "78909C", "607D8B", "546E7A",        //blue grey
        "455A64", "37474F", "263238"
};

These are the material design colors.take a random color from it.

// generate a random number
int i = new Random().nextInt(254);

it will generate a random number from 0 to 254

GradientDrawable shape = new GradientDrawable();
        shape.setShape(GradientDrawable.OVAL);
        shape.setColor(Color.parseColor ("#"+mColors[new Random().nextInt(254)]));
        mTextView..setBackground(shape);

it will choose a random color from the list and set as textview background color

Solution 3:

This is what you want

on BindViewHolder Method

 Random r = new Random();
    int red=r.nextInt(255 - 0 + 1)+0;
    int green=r.nextInt(255 - 0 + 1)+0;
    int blue=r.nextInt(255 - 0 + 1)+0;

    GradientDrawable draw = new GradientDrawable();
    draw.setShape(GradientDrawable.RECTANGLE);
    draw.setColor(Color.rgb(red,green,blue));
    holder.viewInside.setBackground(draw);

ps- view inside is the name of the view.

If you want the exact type of Gmail view then you can use this tiny library which will give you the exact thing you want.

https://github.com/amulyakhare/TextDrawable

Baca Juga

Solution 4:

If you needs to use your own/required colors, just use below code

List<String> colors;

colors=new ArrayList<String>();

        colors.add("#5E97F6");
        colors.add("#9CCC65");
        colors.add("#FF8A65");
        colors.add("#9E9E9E");
        colors.add("#9FA8DA");
        colors.add("#90A4AE");
        colors.add("#AED581");
        colors.add("#F6BF26");
        colors.add("#FFA726");
        colors.add("#4DD0E1");
        colors.add("#BA68C8");
        colors.add("#A1887F");

// all colors used by gmail application :) may be,

 // genrating random num from 0 to 11 because you can add more or less 

Random r = new Random();
        int i1 = r.nextInt(11- 0) + 0;

//genrating shape with colors 

GradientDrawable draw = new GradientDrawable();
        draw.setShape(GradientDrawable.OVAL);
        draw.setColor(Color.parseColor(colors.get(i1)))

// assigning to textview 
contact_name_circle.setBackground(draw); //textview

Solution 5:

If you want to generate random (any) color you can just do
Color.rgb(Math.random()*255, Math.random()*255, Math.random()*255)

If you want to pick color from your list i would sugest leaving that xml file and making the list in java of all the colors you want and then just simply using randomly picked color from that array.

Android Coder