Question

如何裁剪相机图像。现在它显示裁剪图像，并在选择裁剪部分后点击＆＃34; 保存＆＃34;按钮。它显示为＆＃34; 保存图像＆＃34;。之后什么也没发生。这是我的代码。

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：

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

Answer 1

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();
        }
    }

您可以使用以下简单教程来执行裁剪：

Answer 2

为自己节省大量时间并使用this library我自己一直在努力尝试自己这么做并偶然发现这个库并且它非常简单易用，你可以获得专业的图像裁剪视图，让你选择相机或照片库。

简单示例：

将图书馆包含在您的游戏中

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

为清单添加权限

<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"/>

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();
    }
  }
}

我不隶属于此软件

Answer 3

试试这个

                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);

如何从相机裁剪图像

3 个答案: