CODEWITHSUNDEEP
android
Waqar UlHaq
Waqar UlHaq

Reputation: 6422

Cropping an image to a rectangle

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

Camera View

This is picture taken

Captured Image

This is cropped image, which i'm getting enter image description here

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);

Upvotes: 3

Views: 4396

Answers (2)

Sham Gir
Sham Gir

Reputation: 324

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);

Upvotes: 1

Hong Duan
Hong Duan

Reputation: 4294

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?).

Upvotes: 1

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