Cropping an image to a rectangle

Question

I am trying to crop the image within the rectangle as image attachedI'm able to take and crop the picture. But the cropped image is not of same position. I don't want to use crop images library

This is picture taken

This is cropped image, which i'm getting

This is my layout file

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">

<com.example.android.camera2basic.AutoFitTextureView
    android:id="@+id/texture"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentStart="true"
    android:layout_alignParentTop="true" />

<RelativeLayout
    android:id="@+id/rectangle"
    android:layout_width="300dp"
    android:layout_height="200dp"
    android:background="@drawable/rectangle"
    android:layout_centerInParent="true"></RelativeLayout>
<FrameLayout
    android:id="@+id/control"
    android:layout_width="match_parent"
    android:layout_height="112dp"
    android:layout_alignParentBottom="true"
    android:layout_alignParentStart="true">

    <Button
        android:id="@+id/picture"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="@string/picture" />


</FrameLayout>

This is how i'm doing this

 Rect rectf = new Rect();

 //For coordinates location relative to the screen/display
 relativeLayout.getGlobalVisibleRect(rectf);

 Bitmap croppedBitmap = Bitmap.createBitmap(origBitmap, rectf.left, rectf.top, rectf.width(), rectf.height(), null, false);

Hi, did you found the solution to your problem? – Robert Jan 22 '19 at 00:58 — Robert, Jan 22 '19 at 00:58

score 1 · Answer 1 · answered Jul 25 '18 at 08:23

This is because the Bitmap's size is larger than the screen size, so you have to do some conversions. That is, compute the ratio (bitmap size/screen size), and then calculate the corresponding rect in pixels:

float ratio = bitmap size/screen size; // pseudo code
Bitmap croppedBitmap = Bitmap.createBitmap(origBitmap, rectf.left * ratio,
        rectf.top * ratio, rectf.width() * ratio, rectf.height() * ratio, null, false);

Note: if the aspect ratio(width/height) of the bitmap is the same as the device, then the ratio is either bitmapWidth/screenWidth or bitmapHeight/screenHeight, if not, then you should consider about your way to display the bitmap(e.g. fill height or fill width?).

what's the result now? can you print the values, bitmap size, screen size, relative layout rect, etc. then you can analysis the process. — Hong Duan, Jul 25 '18 at 12:45
@WaqarUlHaq did you found the solution to your problem? I've the same issue and I'm interested by the solution if you got one, Thx — ejay, Nov 23 '18 at 12:34

score 1 · Answer 2 · answered Oct 09 '19 at 14:08

try this

int x1 = Image.getWidth() * x_cordinateOfRextangle /  screenWidth;
int y1 = Image.getHeight() * y_cordinateOfRextangle / screenHeight;
int width1 = Image.getWidth() * widthOfRectangle / screenWidth;
int height1 = Image.getHeight() * heightOfRectangle / screenHeight;

Bitmap croppedImage = Bitmap.createBitmap(Image, x1, y1, width1, height1);

Cropping an image to a rectangle

2 Answers2

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