Examples of generating special images in Android and android

Examples of generating special images in Android and android

Import android. graphics. bitmap; import android. graphics. canvas; import android. graphics. color; import android. graphics. linearGradient; import android. graphics. paint; import android. graphics. path; import android. graphics. porterDuff; import android. graphics. porterduxfermode; import android. graphics. rect; import android. graphics. rectF; import android. graphics. shader; import android. graphics. bitmap. config; import android. graphics. paint. align; import android. graphics. porterDuff. mode; import android. graphics. drawable. drawable; public class DrawUtil {/*** draws a semi-circle with the title text in the middle, you can set the shadow and top rectangular projection ** @ param text * Title text (this is set to the center effect of the two words) * @ param radio * Half circle radius * @ param shadowWidth * shadow width * @ param isWithRectf * whether there is a rectangular projection * @ param rectfColor * the color of the rectangular projection * @ param paint * paint Brush object * @ return */public static Bitmap drawHalfCircleWithText (String text, int radio, int shadowWidth, boolean isWithRectf, int rectfColor, Paint paint) {Bitmap bitmap = Bitmap. createBitmap (radio * 2, radio * 2 + shadowWidth, Config. ARGB_8888); Canvas canvas = new Canvas (bitmap); // draw a sector with a circle center, which is a semi-circle canvas. drawArc (new RectF (0, 0, radio * 2, radio * 2), 360,180, true, paint); // do you need to draw a rectangular projection on the top of the semi-circle if (isWithRectf) {paint = reset (paint); paint. setColor (rectfColor); Bitmap bmp = drawRectf (radio * 2, radio/8, paint); paint = reset (paint); paint. setXfermode (new porterduxfermode (PorterDuff. mode. SRC_ATOP); // remove the canvas that does not intersection the rectangular projection and the semi-circle. drawBitmap (bmp, 0, radio, paint);} else {LinearGradient lg = new LinearGradient (00000000, 0, radio/x 44000000,0 x, Shader. tileMode. MIRROR); paint = reset (paint); paint. setShader (lg); Bitmap bmp = drawRectf (radio * 2, radio/8, paint); paint = reset (paint); paint. setXfermode (new porterduxfermode (PorterDuff. mode. SRC_ATOP); // remove the canvas that does not intersection the rectangular projection and the semi-circle. drawBitmap (bmp, 0, radio, paint);} // draw the text paint = reset (paint); paint on the semi-circle. setColor (Color. WHITE); paint. setTextSize (radio * 5/12); paint. setTextAlign (Align. CENTER); paint. setXfermode (new porterduxfermode (PorterDuff. mode. SRC_OVER); canvas. drawText (text, radio, radio * 5/3, paint); bitmap = Bitmap. createBitmap (bitmap, 0, radio, radio * 2, radio + shadowWidth); return bitmap ;} /*** draw a specified number of triangles based on the width ** @ param screenWidth * width * @ param triangleHeight * sawtooth height * @ param triangleNum * Number of triangles * @ param isDown * orientation of triangle vertices, true indicates downward, false indicates upward * @ param paint * paint Brush object * @ return returns bitmap object */public static Bitmap drawtriangle (float screenWidth, float triangleHeight, int triangleNum, boolean isDown, paint paint) {float triangleWidth = screenWidth/triangleNum; Bitmap bitmap = Bitmap. createBitmap (int) screenWidth, (int) triangleHeight, Config. ARGB_8888); Canvas canvas = new Canvas (bitmap); Path path = new Path (); if (isDown) {path. moveTo (0, 0); for (int I = 0; I <triangleNum * 2; I ++) {if (I % 2 = 0) {path. lineTo (triangleWidth/2) * (I + 1), triangleHeight);} else if (I % 2 = 1) {path. lineTo (triangleWidth/2) * (I + 1), 0) ;}} else {path. moveTo (0, triangleHeight); for (int I = 0; I <triangleNum * 2; I ++) {if (I % 2 = 0) {path. lineTo (triangleWidth/2) * (I + 1), 0);} else if (I % 2 = 1) {path. lineTo (triangleWidth/2) * (I + 1), triangleHeight) ;}} path. close (); canvas. drawPath (path, paint); return bitmap ;} /*** draw a lace with a specified number of half circles * @ param width the length of the lace * @ param num the number of half circles * @ param paint brush object * @ return */public static Bitmap drawMultHalfCircle (int width, int num, Paint paint) {int radio = (width/num)/2; Bitmap bitmap = Bitmap. createBitmap (width, radio, Config. ARGB_8888); Canvas canvas = new Canvas (bitmap); for (int I = 0; I <num; I ++) {canvas. drawBitmap (drawHalfCircle (radio, paint), radio * 2 * I, 0, paint);} return bitmap ;} /*** draw a rectangle * @ param width * @ param height * @ param color * @ param paint * @ return */public static Bitmap drawRectf (float width, float height, paint paint) {Bitmap bitmap = Bitmap. createBitmap (int) width, (int) height, Config. ARGB_8888); Canvas canvas = new Canvas (bitmap); canvas. drawRect (0, 0, width, height, paint); return bitmap ;} /*** draw a semi-circle ** @ param radio * radius * @ param paint * @ return */public static Bitmap drawHalfCircle (int radio, Paint paint) {Bitmap bitmap = Bitmap. createBitmap (int) (radio * 2), (int) (radio * 2), Config. ARGB_8888); Canvas canvas = new Canvas (bitmap); canvas. drawArc (new RectF (0, 0, radio * 2, radio * 2), 360,180, true, paint); bitmap = Bitmap. createBitmap (bitmap, 0, radio, radio * 2, radio); return bitmap ;} /*** cut the image into a circle based on its short side and draw a certain width of white side around it * @ param bitmap * @ param ringWidth * @ param radio * @ param paint * @ return */ public static Bitmap drawBitmapWithRing (Bitmap bitmap, int ringWidth, Paint paint) {Bitmap roundBitmap = toRoundBitmap (bitmap); int radio = roundBitmap. getWidth ()/2; Bitmap _ bitmap = Bitmap. createBitmap (radio + ringWidth) * 2, (radio + ringWidth) * 2, Config. ARGB_8888); Canvas canvas = new Canvas (_ bitmap); canvas. drawCircle (radio + ringWidth), paint); paint. setXfermode (new porterduxfermode (PorterDuff. mode. SRC_OVER); canvas. drawBitmap (roundBitmap, ringWidth, ringWidth, paint); return _ bitmap ;} /*** crop the image into a circle ** @ param bitmap * @ return */public static Bitmap toRoundBitmap (Bitmap bitmap) {if (bitmap = null) {return null ;} int width = bitmap. getWidth (); int height = bitmap. getHeight (); float roundPx; float left, top, right, bottom, dst_left, dst_top, dst_right, dst_bottom; if (width <= height) {roundPx = width/2; top = 0; bottom = width; left = 0; right = width; height = width; dst_left = 0; dst_top = 0; dst_right = width; dst_bottom = width ;} else {roundPx = height/2; float clip = (width-height)/2; left = clip; right = width-clip; top = 0; bottom = height; width = height; dst_left = 0; dst_top = 0; dst_right = height; dst_bottom = height;} Bitmap output = Bitmap. createBitmap (width, height, Config. ARGB_8888); Canvas canvas = new Canvas (output); final int color = 0xff0000242; final Paint paint = new Paint (); final Rect src = new Rect (int) left, (int) top, (int) right, (int) bottom); final Rect dst = new Rect (int) dst_left, (int) dst_top, (int) dst_right, (int) dst_bottom); final RectF rectF = new RectF (dst); paint. setAntiAlias (true); canvas. drawARGB (0, 0, 0, 0); paint. setColor (color); canvas. drawRoundRect (rectF, roundPx, roundPx, paint); paint. setXfermode (new porterduduxfermode (Mode. SRC_IN); canvas. drawBitmap (bitmap, src, dst, paint); return output;} public static Bitmap darwShadow (Bitmap bitmap, int color, int padding) {int width = bitmap. getWidth () + padding; int height = bitmap. getHeight () + padding; Bitmap output = Bitmap. createBitmap (width, height, Config. ARGB_8888); Canvas canvas = new Canvas (output); Paint paint = new Paint (); paint = reset (paint); paint. setColor (color); canvas. drawBitmap (bitmap, padding/2, padding/2, null); canvas. drawRoundRect (new RectF (0, 0, width, height), padding/2, padding/2, paint); return output;} private static Paint reset (Paint paint) {paint. reset (); paint. setAntiAlias (true); paint. setStyle (Paint. style. FILL); return paint ;}}

Several Simple Bitmap obtaining examples for Android

Bitmap. createBitmap (Bitmap source, int x, int y, int width, int height); // parameter 1: Bitmap resource, parameter 2: X coordinate in the Bitmap, parameter 3, Y coordinate in the bitmap. Parameter 4: width of the bitmap. Parameter 4: height of the bitmap. Note: X + width cannot be greater than the original source bitmap width, width cannot be equal to 0, y + height cannot be greater than the original bitmap height, and height cannot be less than 0

In Android development, View is used as an example of the simplest way to display images. Only images are displayed, which is short.

This is simple! Source code is sent to you!