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bhargavms/BitmapUtils.java

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A utility class for bitmap related operations.
Raw
BitmapUtils.java
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.util.Log;
import com.crashlytics.android.Crashlytics;
import com.koushikdutta.ion.Ion;
import name.space.to.ColorUtils;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.concurrent.ExecutionException;
/**
* A Utility class for bitmap related functions.
*/
@SuppressWarnings({"TryFinallyCanBeTryWithResources", "unused"})
public class BitmapUtils {
private static final String TAG = BitmapUtils.class.getSimpleName();
// Decodes image and scales it to reduce memory consumption
public static Bitmap decodeFile(InputStream inputStream, float resizedHeight, float resizedWidth) {
if (resizedHeight == 0 || resizedWidth == 0) {
return BitmapFactory.decodeStream(inputStream);
}
// Decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(inputStream, null, o);
// Find the correct scale value. It should be the power of 2.
int scale = 1;
while (o.outWidth / scale / 2 >= resizedWidth &&
o.outHeight / scale / 2 >= resizedHeight) {
scale *= 2;
}
// Decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize = scale;
return BitmapFactory.decodeStream(inputStream, null, o2);
}
public static Bitmap decodeFile(File f, float resizedHeight, float resizedWidth) {
Bitmap bitmap = null;
if (f == null) {
return null;
}
long fileSize = f.length();
Log.d(TAG, "File size = " + fileSize);
try {
FileInputStream fileInputStream = new FileInputStream(f);
try {
bitmap = decodeFile(fileInputStream, resizedHeight, resizedWidth);
} finally {
fileInputStream.close();
}
} catch (IOException ioEx) {
Log.e(TAG, ioEx.getMessage(), ioEx);
}
return bitmap;
}
/**
* Uses http url connection, this function is error prone, all error possibilities are
* not handled here, recommend using an http library for this functionality.
* (Also if you can think of any improvements please post them)
*/
public static Bitmap getBitmap(String url) {
InputStream is;
try {
Bitmap bitmap;
URL imageUrl = new URL(url);
HttpURLConnection conn = (HttpURLConnection) imageUrl.openConnection();
conn.setConnectTimeout(70000);
conn.setReadTimeout(70000);
conn.setInstanceFollowRedirects(true);
conn.connect();
int status = conn.getResponseCode();
if (status == HttpURLConnection.HTTP_OK) {
is = conn.getInputStream();
} else {
is = conn.getErrorStream();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line;
while ((line = br.readLine()) != null) {
sb.append(line).append("\n");
}
br.close();
Log.e("API_RESPONSE", sb.toString());
return null;
}
bitmap = BitmapFactory.decodeStream(is);
conn.disconnect();
is.close();
return bitmap;
} catch (Throwable ex) {
ex.printStackTrace();
//noinspection StatementWithEmptyBody
if (ex instanceof OutOfMemoryError) {
Crashlytics.log(Log.ERROR, TAG, "Out of memory while getting bitmap using http url connection lib");
Crashlytics.logException(ex);
}
return null;
}
}
public static Bitmap getResizedBitmap(Bitmap bm, float newHeight, float newWidth) {
float width = bm.getWidth();
float height = bm.getHeight();
float scaleWidth = (newWidth) / width;
float scaleHeight = (newHeight) / height;
// create a matrix for the manipulation
Matrix matrix = new Matrix();
// resize the bit map
matrix.postScale(scaleWidth, scaleHeight);
// recreate the new Bitmap
return Bitmap.createBitmap(bm, 0, 0, (int) width, (int) height, matrix, false);
}
public static Bitmap getBitmapWith(int color, String text, int textColor, int drawableWidth, int drawableHeight) {
Bitmap bm = Bitmap.createBitmap(drawableWidth, drawableHeight, Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(bm);
// Draw background
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG
| Paint.LINEAR_TEXT_FLAG);
paint.setStyle(Paint.Style.FILL);
paint.setColor(color);
c.drawPaint(paint);
Paint textPaint = new Paint();
textPaint.setStyle(Paint.Style.FILL);
textPaint.setTextAlign(Paint.Align.CENTER);
textPaint.setColor(textColor);
textPaint.setTextSize(c.getWidth() / 2);
c.drawText(text.toUpperCase(), c.getWidth() / 2, (c.getHeight() / 2 + textPaint.getTextSize() / 4), textPaint);
return bm;
}
public static Bitmap getBitmapWithRandomColor(char c, int width, int height) {
return getBitmapWith(ColorUtils.getRandomMaterialColor(ColorUtils.MaterialColorIntensity.INTENSITY_700), String.valueOf(c), Color.WHITE, width, height);
}
/**
* Stack Blur v1.0 from
* http://www.quasimondo.com/StackBlurForCanvas/StackBlurDemo.html
* Java Author: Mario Klingemann <mario at quasimondo.com>
* http://incubator.quasimondo.com
* <p/>
* created Feburary 29, 2004
* Android port : Yahel Bouaziz <yahel at kayenko.com>
* http://www.kayenko.com
* ported april 5th, 2012
* <p/>
* This is a compromise between Gaussian Blur and Box blur
* It creates much better looking blurs than Box Blur, but is
* 7x faster than my Gaussian Blur implementation.
* <p/>
* I called it Stack Blur because this describes best how this
* filter works internally: it creates a kind of moving stack
* of colors whilst scanning through the image. Thereby it
* just has to add one new block of color to the right side
* of the stack and remove the leftmost color. The remaining
* colors on the topmost layer of the stack are either added on
* or reduced by one, depending on if they are on the right or
* on the left side of the stack.
* <p/>
* If you are using this algorithm in your code please add
* the following line:
* Stack Blur Algorithm by Mario Klingemann <[email protected]>
*
* @param sentBitmap bitmap to blur.
* @param scale the float to scale the bitmap into before blurring it, lower values means better
* performance.(should be between 0-1)
* @param radius must be > 1.
* The bigger the radius, the blurrier the final image. The algorithm mixes the
* pixels in a circle "radius" wide.The final color of the pixel being modified
* is the average of all the pixel in the "radius" circle.
* @return the blurred bitmap.
* @author Mario Klingemann <[email protected]>
*/
public static Bitmap fastBlur(Bitmap sentBitmap, float scale, int radius) {
int width = Math.round(sentBitmap.getWidth() * scale);
int height = Math.round(sentBitmap.getHeight() * scale);
sentBitmap = Bitmap.createScaledBitmap(sentBitmap, width, height, false);
Bitmap bitmap = sentBitmap.copy(sentBitmap.getConfig(), true);
if (radius < 1) {
return (null);
}
int w = bitmap.getWidth();
int h = bitmap.getHeight();
int[] pix = new int[w * h];
Log.e("pix", w + " " + h + " " + pix.length);
bitmap.getPixels(pix, 0, w, 0, 0, w, h);
int wm = w - 1;
int hm = h - 1;
int wh = w * h;
int div = radius + radius + 1;
int r[] = new int[wh];
int g[] = new int[wh];
int b[] = new int[wh];
int rsum, gsum, bsum, x, y, i, p, yp, yi, yw;
int vmin[] = new int[Math.max(w, h)];
int divsum = (div + 1) >> 1;
divsum *= divsum;
int dv[] = new int[256 * divsum];
for (i = 0; i < 256 * divsum; i++) {
dv[i] = (i / divsum);
}
yw = yi = 0;
int[][] stack = new int[div][3];
int stackpointer;
int stackstart;
int[] sir;
int rbs;
int r1 = radius + 1;
int routsum, goutsum, boutsum;
int rinsum, ginsum, binsum;
for (y = 0; y < h; y++) {
rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
for (i = -radius; i <= radius; i++) {
p = pix[yi + Math.min(wm, Math.max(i, 0))];
sir = stack[i + radius];
sir[0] = (p & 0xff0000) >> 16;
sir[1] = (p & 0x00ff00) >> 8;
sir[2] = (p & 0x0000ff);
rbs = r1 - Math.abs(i);
rsum += sir[0] * rbs;
gsum += sir[1] * rbs;
bsum += sir[2] * rbs;
if (i > 0) {
rinsum += sir[0];
ginsum += sir[1];
binsum += sir[2];
} else {
routsum += sir[0];
goutsum += sir[1];
boutsum += sir[2];
}
}
stackpointer = radius;
for (x = 0; x < w; x++) {
r[yi] = dv[rsum];
g[yi] = dv[gsum];
b[yi] = dv[bsum];
rsum -= routsum;
gsum -= goutsum;
bsum -= boutsum;
stackstart = stackpointer - radius + div;
sir = stack[stackstart % div];
routsum -= sir[0];
goutsum -= sir[1];
boutsum -= sir[2];
if (y == 0) {
vmin[x] = Math.min(x + radius + 1, wm);
}
p = pix[yw + vmin[x]];
sir[0] = (p & 0xff0000) >> 16;
sir[1] = (p & 0x00ff00) >> 8;
sir[2] = (p & 0x0000ff);
rinsum += sir[0];
ginsum += sir[1];
binsum += sir[2];
rsum += rinsum;
gsum += ginsum;
bsum += binsum;
stackpointer = (stackpointer + 1) % div;
sir = stack[(stackpointer) % div];
routsum += sir[0];
goutsum += sir[1];
boutsum += sir[2];
rinsum -= sir[0];
ginsum -= sir[1];
binsum -= sir[2];
yi++;
}
yw += w;
}
for (x = 0; x < w; x++) {
rinsum = ginsum = binsum = routsum = goutsum = boutsum = rsum = gsum = bsum = 0;
yp = -radius * w;
for (i = -radius; i <= radius; i++) {
yi = Math.max(0, yp) + x;
sir = stack[i + radius];
sir[0] = r[yi];
sir[1] = g[yi];
sir[2] = b[yi];
rbs = r1 - Math.abs(i);
rsum += r[yi] * rbs;
gsum += g[yi] * rbs;
bsum += b[yi] * rbs;
if (i > 0) {
rinsum += sir[0];
ginsum += sir[1];
binsum += sir[2];
} else {
routsum += sir[0];
goutsum += sir[1];
boutsum += sir[2];
}
if (i < hm) {
yp += w;
}
}
yi = x;
stackpointer = radius;
for (y = 0; y < h; y++) {
// Preserve alpha channel: ( 0xff000000 & pix[yi] )
pix[yi] = (0xff000000 & pix[yi]) | (dv[rsum] << 16) | (dv[gsum] << 8) | dv[bsum];
rsum -= routsum;
gsum -= goutsum;
bsum -= boutsum;
stackstart = stackpointer - radius + div;
sir = stack[stackstart % div];
routsum -= sir[0];
goutsum -= sir[1];
boutsum -= sir[2];
if (x == 0) {
vmin[y] = Math.min(y + r1, hm) * w;
}
p = x + vmin[y];
sir[0] = r[p];
sir[1] = g[p];
sir[2] = b[p];
rinsum += sir[0];
ginsum += sir[1];
binsum += sir[2];
rsum += rinsum;
gsum += ginsum;
bsum += binsum;
stackpointer = (stackpointer + 1) % div;
sir = stack[stackpointer];
routsum += sir[0];
goutsum += sir[1];
boutsum += sir[2];
rinsum -= sir[0];
ginsum -= sir[1];
binsum -= sir[2];
yi += w;
}
}
// Log.e("pix", w + " " + h + " " + pix.length);
bitmap.setPixels(pix, 0, w, 0, 0, w, h);
return (bitmap);
}
}
Raw
colors.xml
<resources>
<!-- Contains all the nice material pallete colors, the getRandomMaterialColor method in the ColorUtils class
picks a random color from these resources -->
<color name="red_50">#FFEBEE</color>
<color name="red_100">#FFCDD2</color>
<color name="red_200">#EF9A9A</color>
<color name="red_300">#E57373</color>
<color name="red_400">#EF5350</color>
<color name="red_500">#F44336</color>
<color name="red_600">#E53935</color>
<color name="red_700">#D32F2F</color>
<color name="red_800">#C62828</color>
<color name="red_900">#B71C1C</color>
<color name="red_A100">#FF8A80</color>
<color name="red_A200">#FF5252</color>
<color name="red_A400">#FF1744</color>
<color name="red_A700">#D50000</color>
<color name="deep_purple_50">#EDE7F6</color>
<color name="deep_purple_100">#D1C4E9</color>
<color name="deep_purple_200">#B39DDB</color>
<color name="deep_purple_300">#9575CD</color>
<color name="deep_purple_400">#7E57C2</color>
<color name="deep_purple_500">#673AB7</color>
<color name="deep_purple_600">#5E35B1</color>
<color name="deep_purple_700">#512DA8</color>
<color name="deep_purple_800">#4527A0</color>
<color name="deep_purple_900">#311B92</color>
<color name="deep_purple_A100">#B388FF</color>
<color name="deep_purple_A200">#7C4DFF</color>
<color name="deep_purple_A400">#651FFF</color>
<color name="deep_purple_A700">#6200EA</color>
<color name="light_blue_50">#E1F5FE</color>
<color name="light_blue_100">#B3E5FC</color>
<color name="light_blue_200">#81D4FA</color>
<color name="light_blue_300">#4FC3F7</color>
<color name="light_blue_400">#29B6F6</color>
<color name="light_blue_500">#03A9F4</color>
<color name="light_blue_600">#039BE5</color>
<color name="light_blue_700">#0288D1</color>
<color name="light_blue_800">#0277BD</color>
<color name="light_blue_900">#01579B</color>
<color name="light_blue_A100">#80D8FF</color>
<color name="light_blue_A200">#40C4FF</color>
<color name="light_blue_A400">#00B0FF</color>
<color name="light_blue_A700">#0091EA</color>
<color name="green_50">#E8F5E9</color>
<color name="green_100">#C8E6C9</color>
<color name="green_200">#A5D6A7</color>
<color name="green_300">#81C784</color>
<color name="green_400">#66BB6A</color>
<color name="green_500">#4CAF50</color>
<color name="green_600">#43A047</color>
<color name="green_700">#388E3C</color>
<color name="green_800">#2E7D32</color>
<color name="green_900">#1B5E20</color>
<color name="green_A100">#B9F6CA</color>
<color name="green_A200">#69F0AE</color>
<color name="green_A400">#00E676</color>
<color name="green_A700">#00C853</color>
<color name="yellow_50">#FFFDE7</color>
<color name="yellow_100">#FFF9C4</color>
<color name="yellow_200">#FFF59D</color>
<color name="yellow_300">#FFF176</color>
<color name="yellow_400">#FFEE58</color>
<color name="yellow_500">#FFEB3B</color>
<color name="yellow_600">#FDD835</color>
<color name="yellow_700">#FBC02D</color>
<color name="yellow_800">#F9A825</color>
<color name="yellow_900">#F57F17</color>
<color name="yellow_A100">#FFFF8D</color>
<color name="yellow_A200">#FFFF00</color>
<color name="yellow_A400">#FFEA00</color>
<color name="yellow_A700">#FFD600</color>
<color name="deep_orange_50">#FBE9E7</color>
<color name="deep_orange_100">#FFCCBC</color>
<color name="deep_orange_200">#FFAB91</color>
<color name="deep_orange_300">#FF8A65</color>
<color name="deep_orange_400">#FF7043</color>
<color name="deep_orange_500">#FF5722</color>
<color name="deep_orange_600">#F4511E</color>
<color name="deep_orange_700">#E64A19</color>
<color name="deep_orange_800">#D84315</color>
<color name="deep_orange_900">#BF360C</color>
<color name="deep_orange_A100">#FF9E80</color>
<color name="deep_orange_A200">#FF6E40</color>
<color name="deep_orange_A400">#FF3D00</color>
<color name="deep_orange_A700">#DD2C00</color>
<color name="pink_50">#FCE4EC</color>
<color name="pink_100">#F8BBD0</color>
<color name="pink_200">#F48FB1</color>
<color name="pink_300">#F06292</color>
<color name="pink_400">#EC407A</color>
<color name="pink_500">#E91E63</color>
<color name="pink_600">#D81B60</color>
<color name="pink_700">#C2185B</color>
<color name="pink_800">#AD1457</color>
<color name="pink_900">#880E4F</color>
<color name="pink_A100">#FF80AB</color>
<color name="pink_A200">#FF4081</color>
<color name="pink_A400">#F50057</color>
<color name="pink_A700">#C51162</color>
<color name="indigo_50">#E8EAF6</color>
<color name="indigo_100">#C5CAE9</color>
<color name="indigo_200">#9FA8DA</color>
<color name="indigo_300">#7986CB</color>
<color name="indigo_400">#5C6BC0</color>
<color name="indigo_500">#3F51B5</color>
<color name="indigo_600">#3949AB</color>
<color name="indigo_700">#303F9F</color>
<color name="indigo_800">#283593</color>
<color name="indigo_900">#1A237E</color>
<color name="indigo_A100">#8C9EFF</color>
<color name="indigo_A200">#536DFE</color>
<color name="indigo_A400">#3D5AFE</color>
<color name="indigo_A700">#304FFE</color>
<color name="cyan_50">#E0F7FA</color>
<color name="cyan_100">#B2EBF2</color>
<color name="cyan_200">#80DEEA</color>
<color name="cyan_300">#4DD0E1</color>
<color name="cyan_400">#26C6DA</color>
<color name="cyan_500">#00BCD4</color>
<color name="cyan_600">#00ACC1</color>
<color name="cyan_700">#0097A7</color>
<color name="cyan_800">#00838F</color>
<color name="cyan_900">#006064</color>
<color name="cyan_A100">#84FFFF</color>
<color name="cyan_A200">#18FFFF</color>
<color name="cyan_A400">#00E5FF</color>
<color name="cyan_A700">#00B8D4</color>
<color name="amber_50">#FFF8E1</color>
<color name="amber_100">#FFECB3</color>
<color name="amber_200">#FFE082</color>
<color name="amber_300">#FFD54F</color>
<color name="amber_400">#FFCA28</color>
<color name="amber_500">#FFC107</color>
<color name="amber_600">#FFB300</color>
<color name="amber_700">#FFA000</color>
<color name="amber_800">#FF8F00</color>
<color name="amber_900">#FF6F00</color>
<color name="amber_A100">#FFE57F</color>
<color name="amber_A200">#FFD740</color>
<color name="amber_A400">#FFC400</color>
<color name="amber_A700">#FFAB00</color>
<color name="brown_50">#EFEBE9</color>
<color name="brown_100">#D7CCC8</color>
<color name="brown_200">#BCAAA4</color>
<color name="brown_300">#A1887F</color>
<color name="brown_400">#8D6E63</color>
<color name="brown_500">#795548</color>
<color name="brown_600">#6D4C41</color>
<color name="brown_700">#5D4037</color>
<color name="brown_800">#4E342E</color>
<color name="brown_900">#3E2723</color>
<color name="purple_50">#F3E5F5</color>
<color name="purple_100">#E1BEE7</color>
<color name="purple_200">#CE93D8</color>
<color name="purple_300">#BA68C8</color>
<color name="purple_400">#AB47BC</color>
<color name="purple_500">#9C27B0</color>
<color name="purple_600">#8E24AA</color>
<color name="purple_700">#7B1FA2</color>
<color name="purple_800">#6A1B9A</color>
<color name="purple_900">#4A148C</color>
<color name="purple_A100">#EA80FC</color>
<color name="purple_A200">#E040FB</color>
<color name="purple_A400">#D500F9</color>
<color name="purple_A700">#AA00FF</color>
<color name="blue_50">#E3F2FD</color>
<color name="blue_100">#BBDEFB</color>
<color name="blue_200">#90CAF9</color>
<color name="blue_300">#64B5F6</color>
<color name="blue_400">#42A5F5</color>
<color name="blue_500">#2196F3</color>
<color name="blue_600">#1E88E5</color>
<color name="blue_700">#1976D2</color>
<color name="blue_800">#1565C0</color>
<color name="blue_900">#0D47A1</color>
<color name="blue_A100">#82B1FF</color>
<color name="blue_A200">#448AFF</color>
<color name="blue_A400">#2979FF</color>
<color name="blue_A700">#2962FF</color>
<color name="teal_50">#E0F2F1</color>
<color name="teal_100">#B2DFDB</color>
<color name="teal_200">#80CBC4</color>
<color name="teal_300">#4DB6AC</color>
<color name="teal_400">#26A69A</color>
<color name="teal_500">#009688</color>
<color name="teal_600">#00897B</color>
<color name="teal_700">#00796B</color>
<color name="teal_800">#00695C</color>
<color name="teal_900">#004D40</color>
<color name="teal_A100">#A7FFEB</color>
<color name="teal_A200">#64FFDA</color>
<color name="teal_A400">#1DE9B6</color>
<color name="teal_A700">#00BFA5</color>
<color name="lime_50">#F9FBE7</color>
<color name="lime_100">#F0F4C3</color>
<color name="lime_200">#E6EE9C</color>
<color name="lime_300">#DCE775</color>
<color name="lime_400">#D4E157</color>
<color name="lime_500">#CDDC39</color>
<color name="lime_600">#C0CA33</color>
<color name="lime_700">#AFB42B</color>
<color name="lime_800">#9E9D24</color>
<color name="lime_900">#827717</color>
<color name="lime_A100">#F4FF81</color>
<color name="lime_A200">#EEFF41</color>
<color name="lime_A400">#C6FF00</color>
<color name="lime_A700">#AEEA00</color>
<color name="orange_50">#FFF3E0</color>
<color name="orange_100">#FFE0B2</color>
<color name="orange_200">#FFCC80</color>
<color name="orange_300">#FFB74D</color>
<color name="orange_400">#FFA726</color>
<color name="orange_500">#FF9800</color>
<color name="orange_600">#FB8C00</color>
<color name="orange_700">#F57C00</color>
<color name="orange_800">#EF6C00</color>
<color name="orange_900">#E65100</color>
<color name="orange_A100">#FFD180</color>
<color name="orange_A200">#FFAB40</color>
<color name="orange_A400">#FF9100</color>
<color name="orange_A700">#FF6D00</color>
<!-- array of the colors, that are of A700 intensity as shown in google's material pallette -->
<array name="materialA700Colors">
<item>#FF6D00</item>
<item>#AEEA00</item>
<item>#00BFA5</item>
<item>#2962FF</item>
<item>#AA00FF</item>
<item>#3E2723</item>
<item>#00B8D4</item>
<item>#304FFE</item>
<item>#C51162</item>
<item>#DD2C00</item>
<item>#00C853</item>
<item>#0091EA</item>
<item>#6200EA</item>
<item>#D50000</item>
</array>
</resources>
Raw
ColorUtils.java
import android.graphics.Color;
/**
* Utility class for color manipulation.
*/
public class ColorUtils {
@SuppressWarnings("unused")
public enum MaterialColorIntensity {
INTENSITY_50("50"),
INTENSITY_100("100"),
INTENSITY_200("200"),
INTENSITY_300("300"),
INTENSITY_400("400"),
INTENSITY_500("500"),
INTENSITY_600("600"),
INTENSITY_700("700"),
INTENSITY_800("800"),
INTENSITY_900("900"),
INTENSITY_A100("A100"),
INTENSITY_A200("A200"),
INTENSITY_A400("A400"),
INTENSITY_A700("A700");
private final String text;
MaterialColorIntensity(final String text) {
this.text = text;
}
@Override
public String toString() {
return this.text;
}
}
private static String[] colors = new String[]{
"red", "deep_purple", "light_blue", "green", "yellow", "deep_orange", "pink", "indigo",
"cyan", "amber", "brown", "purple", "blue", "teal", "lime", "orange"
};
/**
* Lightens a color by a given factor.
*
* @param color The color to lighten
* @param factor The factor to lighten the color. 0 will make the color unchanged. 1 will make the
* color white.
* @return lighter version of the specified color.
*/
public static int lighter(int color, float factor) {
int red = (int) ((Color.red(color) * (1 - factor) / 255 + factor) * 255);
int green = (int) ((Color.green(color) * (1 - factor) / 255 + factor) * 255);
int blue = (int) ((Color.blue(color) * (1 - factor) / 255 + factor) * 255);
return Color.argb(Color.alpha(color), red, green, blue);
}
/**
* Method for generating a random material color of the given intensity, from the google material
* palette.
*
* @param colorIntensity the intensity id as given in the
* https://www.google.com/design/spec/style/color.html web page.
* @param appContext your application context reference.
*
* @return a random color of the given intensity.
*/
public static int getRandomMaterialColor(MaterialColorIntensity colorIntensity, Context appContext) {
int randomIndex = (int) (Math.random() * colors.length);
String colorString = String.format("%s_%s", colors[randomIndex], colorIntensity.toString());
int identifier = context.getResources()
.getIdentifier(colorString, "color", context.getPackageName());
return context.getResources().getColor(identifier);
}
}
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