Android 如何从相机裁剪图像

How to crop images from camera

提问by Himanshu Agarwal

How can I crop the camera images. Now it is showing the the image for crop and after selecting the crop section while tap on the "Save" button. Its showing as "saving image". After that nothing is happen. Here is my code.

如何裁剪相机图像。现在它显示了裁剪图像，在点击“保存”按钮的同时选择裁剪部分。它显示为“保存图像”。之后什么都没有发生。这是我的代码。

Button click :

按钮点击：

Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, MediaStore.Images.Media.EXTERNAL_CONTENT_URI.toString());
intent.putExtra("crop", "true");
intent.putExtra("aspectX", 0);
intent.putExtra("aspectY", 0);
intent.putExtra("outputX", 200);
intent.putExtra("outputY", 150);
intent.putExtra("return-data", true);
startActivityForResult(intent, CAMERA_PIC_REQUEST);

onActivityResult :

onActivityResult :

Bundle extras = data.getExtras();
Bitmap bitmap = (Bitmap) extras.get("data");
if (bitmap != null) {
    Img_View.setImageBitmap(bitmap);
}

回答by Himanshu Agarwal

You can use this code to perform cropping:

您可以使用此代码执行裁剪：

.....
final int CAMERA_CAPTURE = 1;
final int CROP_PIC = 2;
private Uri picUri;
....
@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Button captureBtn = (Button) findViewById(R.id.capture_btn);
        captureBtn.setOnClickListener(this);
    }

    public void onClick(View v) {
        if (v.getId() == R.id.capture_btn) {
            try {
                // use standard intent to capture an image
                Intent captureIntent = new Intent(
                        MediaStore.ACTION_IMAGE_CAPTURE);
                // we will handle the returned data in onActivityResult
                startActivityForResult(captureIntent, CAMERA_CAPTURE);
            } catch (ActivityNotFoundException anfe) {
                Toast toast = Toast.makeText(this, "This device doesn't support the crop action!",
                        Toast.LENGTH_SHORT);
                toast.show();
            }
        }
    }

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (resultCode == RESULT_OK) {
            if (requestCode == CAMERA_CAPTURE) {
                // get the Uri for the captured image
                picUri = data.getData();
                performCrop();
            }
            // user is returning from cropping the image
            else if (requestCode == CROP_PIC) {
                // get the returned data
                Bundle extras = data.getExtras();
                // get the cropped bitmap
                Bitmap thePic = extras.getParcelable("data");
                ImageView picView = (ImageView) findViewById(R.id.picture);
                picView.setImageBitmap(thePic);
            }
        }
    }

    /**
     * this function does the crop operation.
     */
    private void performCrop() {
        // take care of exceptions
        try {
            // call the standard crop action intent (the user device may not
            // support it)
            Intent cropIntent = new Intent("com.android.camera.action.CROP");
            // indicate image type and Uri
            cropIntent.setDataAndType(picUri, "image/*");
            // set crop properties
            cropIntent.putExtra("crop", "true");
            // indicate aspect of desired crop
            cropIntent.putExtra("aspectX", 2);
            cropIntent.putExtra("aspectY", 1);
            // indicate output X and Y
            cropIntent.putExtra("outputX", 256);
            cropIntent.putExtra("outputY", 256);
            // retrieve data on return
            cropIntent.putExtra("return-data", true);
            // start the activity - we handle returning in onActivityResult
            startActivityForResult(cropIntent, CROP_PIC);
        }
        // respond to users whose devices do not support the crop action
        catch (ActivityNotFoundException anfe) {
            Toast toast = Toast
                    .makeText(this, "This device doesn't support the crop action!", Toast.LENGTH_SHORT);
            toast.show();
        }
    }

You can use following simple tutorial to perform cropping:

您可以使用以下简单教程来执行裁剪：

1. http://khurramitdeveloper.blogspot.in/2013/07/capture-or-select-from-gallery-and-crop.html
2. http://www.londatiga.net/featured-articles/how-to-select-and-crop-image-on-android/
3. http://www.coderzheaven.com/2012/12/15/crop-image-android/
4. http://shaikhhamadali.blogspot.in/2013/09/capture-images-and-crop-images-using.html

1. http://khurramitdeveloper.blogspot.in/2013/07/capture-or-select-from-gallery-and-crop.html
2. http://www.londatiga.net/featured-articles/how-to-select-and-crop-image-on-android/
3. http://www.coderzheaven.com/2012/12/15/crop-image-android/
4. http://shaikhhamadali.blogspot.in/2013/09/capture-images-and-crop-images-using.html

回答by Fonix

Save yourself a lot of time and use this libraryI was messing around with trying to do it myself and stumbled on this library and its really simple to use and you get a professional looking image cropping view that lets you choose camera or photo library.

为自己节省大量时间并使用这个库我一直在尝试自己做，偶然发现了这个库，它使用起来非常简单，你会得到一个专业的图像裁剪视图，让你选择相机或照片库。

Simple example:

简单的例子：

Include the library in your gradle

将库包含在您的 gradle 中

implementation 'com.theartofdev.edmodo:android-image-cropper:2.7.+'

Add permissions to manifest

向清单添加权限

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

//add this under <application>
<activity android:name="com.theartofdev.edmodo.cropper.CropImageActivity"
  android:theme="@style/Base.Theme.AppCompat"/>

In your activity

在您的活动中

//on button press or anywhere, this starts the image picking and cropping process
CropImage.activity()
  .setGuidelines(CropImageView.Guidelines.ON)
  .start(this);

//in your activity where you will get the result of your cropped image
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
  if (requestCode == CropImage.CROP_IMAGE_ACTIVITY_REQUEST_CODE) {
    CropImage.ActivityResult result = CropImage.getActivityResult(data);
    if (resultCode == RESULT_OK) {
      Uri resultUri = result.getUri();

      //From here you can load the image however you need to, I recommend using the Glide library

    } else if (resultCode == CropImage.CROP_IMAGE_ACTIVITY_RESULT_ERROR_CODE) {
      Exception error = result.getError();
    }
  }
}

Im not affiliated with this software

我不隶属于这个软件

回答by Jay Rathod RJ

Try this

尝试这个

                Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

                mImageCaptureUri = Uri.fromFile(new File(Environment
                        .getExternalStorageDirectory(), "tmp_avatar_"
                        + String.valueOf(System.currentTimeMillis())
                        + ".jpg"));

                intent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT,
                        mImageCaptureUri);

                intent.setData(mImageCaptureUri);
                intent.putExtra("outputX", 200);
                intent.putExtra("outputY", 200);
                intent.putExtra("aspectX", 1);
                intent.putExtra("aspectY", 1);
                intent.putExtra("scale", true);
                intent.putExtra("return-data", true);