android 圖片處理大全

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Android 圖片處理方法大全

Android編程 , 評論(3) , 引用(0) , 閱讀(1577) 大 | 中 | 小

整理了一下目前Android開發中圖片的各種處理方法：

Java代碼

   /**
     * 使頭像變灰
     * @param drawable
     */
    public static void porBecomeGrey(ImageView imageView, Drawable drawable) {
        drawable.mutate();
        ColorMatrix cm = new ColorMatrix();
        cm.setSaturation(0);
        ColorMatrixColorFilter cf = new ColorMatrixColorFilter(cm);
        drawable.setColorFilter(cf);
        imageView.setImageDrawable(drawable);
    }

 

Java 代碼複製內容到剪貼板

Drawable drawable = new FastBitmapDrawable(bitmap);

Java 代碼複製內容到剪貼板

public byte[] getBitmapByte(Bitmap bitmap){
    ByteArrayOutputStream out = new ByteArrayOutputStream();
    bitmap.compress(Bitmap.CompressFormat.JPEG, 
100, out);
    try {
        out.flush();
        out.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return out.toByteArray();
}


public Bitmap getBitmapFromByte(byte[] temp){
    if(temp != null){
        Bitmap bitmap = BitmapFactory.decodeByteArray(temp, 
0, temp.length);
        return bitmap;
    }else{
        return null;
    }
}

Java 代碼複製內容到剪貼板

/**
     * 將Drawable轉化爲Bitmap
     * @param drawable
     * @return
     */
    public static Bitmap drawableToBitmap(Drawable drawable) {
        int width = drawable.getIntrinsicWidth();
        int height = drawable.getIntrinsicHeight();
        Bitmap bitmap = Bitmap.createBitmap(width, height, drawable
                .getOpacity() != PixelFormat.OPAQUE ? Bitmap.Config.ARGB_8888
                : Bitmap.Config.RGB_565);
        Canvas canvas = new Canvas(bitmap);
        drawable.setBounds(0,
0, width, height);
        drawable.draw(canvas);
        return bitmap;
    }

Java 代碼複製內容到剪貼板

/**
    * 獲取圖片的倒影
    * @param bitmap
    * @return
    */
    public static Bitmap createReflectionImageWithOrigin(Bitmap bitmap) {
        final int reflectionGap =
4;
        int width = bitmap.getWidth();
        int height = bitmap.getHeight();

        Matrix matrix = new Matrix();
        matrix.preScale(1, -1);

        Bitmap reflectionImage = Bitmap.createBitmap(bitmap, 
0, height / 2,
                width, height / 2, matrix,
false);

        Bitmap bitmapWithReflection = Bitmap.createBitmap(width,
                (height + height / 2), Config.ARGB_8888);

        Canvas canvas = new Canvas(bitmapWithReflection);
        canvas.drawBitmap(bitmap, 0,
0, null);
        Paint deafalutPaint = new Paint();
        canvas.drawRect(0, height, width, height + reflectionGap, deafalutPaint);

        canvas.drawBitmap(reflectionImage, 
0, height + reflectionGap, null);

        Paint paint = new Paint();
        LinearGradient shader = new LinearGradient(0, bitmap.getHeight(),
0,
                bitmapWithReflection.getHeight() + reflectionGap,
0x70ffffff,
                0x00ffffff, TileMode.CLAMP);
        paint.setShader(shader);
        paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));
        canvas.drawRect(0, height, width, bitmapWithReflection.getHeight()
                + reflectionGap, paint);
        return bitmapWithReflection;
    }

Java 代碼複製內容到剪貼板

/**
    * 把圖片變成圓角
    * @param bitmap 需要修改的圖片
    * @param pixels 圓角的弧度
    * @return 圓角圖片
    */
   public static Bitmap toRoundCorner(Bitmap bitmap,
int pixels) {

       Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
       Canvas canvas = new Canvas(output);

       final int color =
0xff424242;
       final Paint paint =
new Paint();
       final Rect rect = new Rect(0,
0, bitmap.getWidth(), bitmap.getHeight());
       final RectF rectF =
new RectF(rect);
       final float roundPx = pixels;

       paint.setAntiAlias(true);
       canvas.drawARGB(0,
0, 0,
0);
       paint.setColor(color);
       canvas.drawRoundRect(rectF, roundPx, roundPx, paint);

       paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
       canvas.drawBitmap(bitmap, rect, rect, paint);

       return output;
   }

Java 代碼複製內容到剪貼板

/**
     * 縮放圖片
     * @param bmp
     * @param width
     * @param height
     * @return
     */
    public static Bitmap PicZoom(Bitmap bmp,
int width, int height) {
        int bmpWidth = bmp.getWidth();
        int bmpHeght = bmp.getHeight();
        Matrix matrix = new Matrix();
        matrix.postScale((float) width / bmpWidth, (float) height / bmpHeght);

        return Bitmap.createBitmap(bmp,
0, 0, bmpWidth, bmpHeght, matrix,
true);
    }

Java 代碼複製內容到剪貼板

/**
     * @param photoPath --原圖路經
     * @param aFile     --保存縮圖
     * @param newWidth  --縮圖寬度
     * @param newHeight --縮圖高度
     */
    public static
boolean bitmapToFile(String photoPath, File aFile,
int newWidth, int newHeight) {
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = 
true;
        // 獲取這個圖片的寬和高
        Bitmap bitmap = BitmapFactory.decodeFile(photoPath, options);
        options.inJustDecodeBounds = false;

        //計算縮放比
        options.inSampleSize = reckonThumbnail(options.outWidth, options.outHeight, newWidth, newHeight);

        bitmap = BitmapFactory.decodeFile(photoPath, options);

        try {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.JPEG, 
100, baos);
            byte[] photoBytes = baos.toByteArray();

            if (aFile.exists()) {
                aFile.delete();
            }
            aFile.createNewFile();

            FileOutputStream fos = new FileOutputStream(aFile);
            fos.write(photoBytes);
            fos.flush();
            fos.close();

            return true;
        } catch (Exception e1) {
            e1.printStackTrace();
            if (aFile.exists()) {
                aFile.delete();
            }
            Log.e("Bitmap To File Fail", e1.toString());
            return 
false;
        }
    }

Java 代碼複製內容到剪貼板

/**
     * 計算縮放比
     * @param oldWidth
     * @param oldHeight
     * @param newWidth
     * @param newHeight
     * @return
     */
    public static
int reckonThumbnail(int oldWidth,
int oldHeight, int newWidth,
int newHeight) {
        if ((oldHeight > newHeight && oldWidth > newWidth)
                || (oldHeight <= newHeight && oldWidth > newWidth)) {
            int be = (int) (oldWidth / (float) newWidth);
            if (be <= 
1)
                be = 1;
            return be;
        } else if (oldHeight > newHeight && oldWidth <= newWidth) {
            int be = (int) (oldHeight / (float) newHeight);
            if (be <= 1)
                be = 1;
            return be;
        }

        return 1;
    }

Android邊框圓角

XML/HTML 代碼複製內容到剪貼板

<?xml
version="1.0"
encoding="utf-8"?>
<shape 
xmlns:android="http://schema...android">
    <solid
android:color="#000000"
/>
    <corners
android:topLeftRadius="10dp"
                    android:topRightRadius="10dp"
                android:bottomRightRadius="10dp"
                android:bottomLeftRadius="10dp"/>
</shape>

解釋：solid的表示填充顏色,爲了簡單，這裏用的是黑色。

而corners則是表示圓角，注意的是這裏bottomRightRadius是左下角而不是右下角，bottomLeftRadius右下角。
當然上面的效果也可以像下面一樣設置,如下: <corners android:radius="5dp" />  

 

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