draw Image on Canvas - Android Graphics

Android examples for Graphics:Canvas

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  4. Canvas

Description

draw Image on Canvas

Demo Code


//package com.java2s;
import android.graphics.Bitmap;
import android.graphics.Canvas;

import android.graphics.Paint;
import android.graphics.PointF;
import android.graphics.Rect;
import android.graphics.RectF;

public class Main {
    public static int TOP = 1;
    public static int BOTTOM = 2;
    public static int VCENTER = 4;
    public static int LEFT = 8;
    public static int RIGHT = 16;
    public static int HCENTER = 32;

    public static void drawImage(Canvas canvas, Bitmap image, int x, int y,
            int situation, Paint paint) {
        int rect_x = 0;
        int rect_y = 0;
        int xx = situation & 56;
        int yy = situation & 7;
        if (image == null) {
            return;
        }//from  www  .  ja  v a2s .  c  o m
        if (xx == LEFT) {
            rect_x = x;
        } else if (xx == RIGHT) {
            rect_x = x - image.getWidth();
        } else if (xx == HCENTER) {
            rect_x = x - image.getWidth() / 2;
        }

        if (yy == TOP) {
            rect_y = y;
        } else if (yy == BOTTOM) {
            rect_y = y - image.getHeight();
        } else if (yy == VCENTER) {
            rect_y = y - image.getHeight() / 2;
        }
        canvas.drawBitmap(image, rect_x, rect_y, paint);
    }

    public static void drawImage(Canvas canvas, Bitmap image,
            PointF center, float scale, Paint paint) {
        if (scale <= 0 || image == null)
            return;

        float zoomHeight = image.getHeight() * scale;
        float zoomWidth = image.getWidth() * scale;

        float left = center.x - zoomWidth / 2.0f;
        float top = center.y - zoomHeight / 2.0f;

        Rect srcRect = new Rect(0, 0, image.getWidth(), image.getHeight());
        RectF dstRect = new RectF(left, top, left + zoomWidth, top
                + zoomHeight);

        canvas.drawBitmap(image, srcRect, dstRect, paint);
    }
}

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