All geek questions in one place

Need an example of cropping an image in an Android application

Sorry for the non-technical question.

I’m studying to understand how I can implement a very common function in Android applications where the user can crop part of the image. This is usually done using a square window hovering over the shaded image. A good example is the selection of an image profile in a linkedin application. Does anyone know or have a good example of how to do this?

Thanks in advance.

+4
source share
3 answers

Try the sample method below. Not only can you cut a rectanglebut ANY FORM from anywhere in the raster file you want.

Micky mouse .

. whatsapp , .

, Paint setXfermode ( PoterDuffXfermode (Mode.CLEAR)), .

. , :)

private Bitmap cropAndGivePointedShape(Bitmap originalBitmap)
    {
        Bitmap bmOverlay = Bitmap.createBitmap(originalBitmap.getWidth(),
                                               originalBitmap.getHeight(),
                                               Bitmap.Config.ARGB_8888);

        Paint p = new Paint();
        p.setXfermode(new PorterDuffXfermode(Mode.CLEAR));              
        Canvas canvas = new Canvas(bmOverlay); 
        canvas.drawBitmap(originalBitmap, 0, 0, null); 
        canvas.drawRect(0, 0, 20, 20, p);

        Point a = new Point(0, 20);
        Point b = new Point(20, 20);
        Point c = new Point(0, 40);

        Path path = new Path();
        path.setFillType(FillType.EVEN_ODD);
        path.lineTo(b.x, b.y);
        path.lineTo(c.x, c.y);
        path.lineTo(a.x, a.y);
        path.close();

        canvas.drawPath(path, p);

        a = new Point(0, 40);
        b = new Point(0, 60);
        c = new Point(20, 60);

        path = new Path();
        path.setFillType(FillType.EVEN_ODD);
        path.lineTo(b.x, b.y);
        path.lineTo(c.x, c.y);
        path.lineTo(a.x, a.y);
        path.close();

        canvas.drawPath(path, p);

        canvas.drawRect(0, 60, 20, originalBitmap.getHeight(), p);

        return bmOverlay;
    }
+4

:

1. XML

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="camera.test.demo"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk android:minSdkVersion="8" />

<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".SimpleCameraGalleryDemo"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

</manifest>

2. :

-

package camera.test.demo;
import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

public class SimpleCameraGalleryDemo extends Activity {
private static final int PICK_FROM_CAMERA = 1;
private static final int PICK_FROM_GALLERY = 2;
ImageView imgview;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

imgview = (ImageView) findViewById(R.id.imageView1);
Button buttonCamera = (Button) findViewById(R.id.btn_take_camera);
Button buttonGallery = (Button) findViewById(R.id.btn_select_gallery);
buttonCamera.setOnClickListener(new View.OnClickListener() {

public void onClick(View v) {
// call android default camera
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

intent.putExtra(MediaStore.EXTRA_OUTPUT,
MediaStore.Images.Media.EXTERNAL_CONTENT_URI.toString());
// ******** code for crop image
intent.putExtra("crop", "true");
intent.putExtra("aspectX", 0);
intent.putExtra("aspectY", 0);
intent.putExtra("outputX", 200);
intent.putExtra("outputY", 150);

try {

intent.putExtra("return-data", true);
startActivityForResult(intent, PICK_FROM_CAMERA);

} catch (ActivityNotFoundException e) {
// Do nothing for now
}
}
});
buttonGallery.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent();
// call android default gallery
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
// ******** code for crop image
intent.putExtra("crop", "true");
intent.putExtra("aspectX", 0);
intent.putExtra("aspectY", 0);
intent.putExtra("outputX", 200);
intent.putExtra("outputY", 150);

try {

intent.putExtra("return-data", true);
startActivityForResult(Intent.createChooser(intent,
"Complete action using"), PICK_FROM_GALLERY);

} catch (ActivityNotFoundException e) {
// Do nothing for now
}
}
});
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {

if (requestCode == PICK_FROM_CAMERA) {
Bundle extras = data.getExtras();
if (extras != null) {
Bitmap photo = extras.getParcelable("data");
imgview.setImageBitmap(photo);

}
}

if (requestCode == PICK_FROM_GALLERY) {
Bundle extras2 = data.getExtras();
if (extras2 != null) {
Bitmap photo = extras2.getParcelable("data");
imgview.setImageBitmap(photo);

}
}
}
}

3. Main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<TextView
android:id="@+id/textViewAddCard"
android:layout_width="250dp"
android:layout_height="50dp"
android:text="Take Image"
android:textSize="16dp"
android:layout_gravity="center"
android:gravity="center"
android:typeface="sans"/>

<Button
android:id="@+id/btn_take_camera"
android:layout_width="250dp"
android:layout_height="50dp"
android:text="Take From Camera"
android:layout_marginTop="5dp"
android:layout_gravity="center"
android:typeface="sans"/>

<Button
android:id="@+id/btn_select_gallery"
android:layout_width="250dp"
android:layout_height="50dp"
android:text="Select from Gallery"
android:layout_marginTop="10dp"
android:layout_gravity="center"
android:typeface="sans" />
<ImageView
android:id="@+id/imageView1"
android:layout_gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
+5

:

https://github.com/biokys/cropimage

:

intent.putExtra(CropImage.ASPECT_X, 2);
intent.putExtra(CropImage.ASPECT_Y, 2);

:

intent.putExtra(CropImage.ASPECT_X, 3);
intent.putExtra(CropImage.ASPECT_Y, 2);
+1

Source: https://habr.com/ru/post/1543942/

More articles:


All Articles