从图库中获取图像，但不会裁剪

Question

我有这段代码可以从图库中检索图像

Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.setType("image/*");
    intent.putExtra("crop", "true");
    intent.putExtra("aspectX", 0);
    intent.putExtra("aspectY", 0);
    intent.putExtra("outputX", 360);
    intent.putExtra("outputY", 360);
 try
    {
        intent.putExtra("return-data", true);
        startActivityForResult(Intent.createChooser(intent, "Complete action using"), req_code);
    }
    catch(ActivityNotFoundException e)
    {
        // Do nothing for now
    }

但即使使用intent.putExtra("crop", "true");，在选择图像后，它也不会显示任何裁剪活动或其他任何东西......为什么？

Answer 1

因为它不应该。仅仅因为您在随机的 Intent 对象上添加了随机附加项，并不会神奇地强制第三方应用程序执行他们不执行的操作。

这里是the documentation for ACTION_GET_CONTENT。请注意，您在文档中列出的任何附加内容都没有。因此，没有第三方应用程序必然会期待这些额外功能。

Android 没有可供开发人员使用的内置图像裁剪功能。不过，有很多可用的图像裁剪库。

Answer 2

Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
            photoPickerIntent.setType("image/*");
            startActivityForResult(photoPickerIntent, SELECT_PHOTO);

Answer 3

试试这个代码： （用于从图库中获取图像）

Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
            photoPickerIntent.setType("image/*");
            startActivityForResult(photoPickerIntent, GALLERY_REQUEST);
            dialog.dismiss();

（从画廊中挑选图像后调用此）

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    Bitmap bmp = null;
    if (resultCode == RESULT_OK) {
        try {

            if (requestCode == GALLERY_REQUEST) {
                // Gallery request result
                mImageCaptureUri = data.getData();

                TEMP_PHOTO_FILE_NAME = new File(

                startCropImage();

        } catch (Exception e) {
            e.printStackTrace();
            File f = new File(getRealPathFromURI(mImageCaptureUri));
            if (f.getName().startsWith(FILE_NAME)) {
                if (f.exists())
                    f.delete();
            }
        }
    }
}

private void startCropImage() {


    Intent intent = new Intent("com.android.camera.action.CROP");
    intent.setType("image/*");

  /**
     * Check if there is image cropper app installed.
     */
    List<ResolveInfo> list = getPackageManager().queryIntentActivities(
            intent, 0);

    int size = list.size();
            /**
     * If there is no image cropper app, display warning message
     */
    if (size == 0) {

        Toast.makeText(this, "Can not find image crop app",
                Toast.LENGTH_SHORT).show();

        return;
    } else {
        /**
         * Specify the image path, crop dimension and scale
         */
        intent.setData(mImageCaptureUri);

        intent.putExtra("outputX", 256);
        intent.putExtra("outputY", 256);
        intent.putExtra("aspectX", 1);
        intent.putExtra("aspectY", 1);
        intent.putExtra("scale", true);
        intent.putExtra("return-data", true);
        /**
         * There is posibility when more than one image cropper app exist,
         * so we have to check for it first. If there is only one app, open
         * then app.
         */

        if (size == 1) {
            Intent i = new Intent(intent);
            ResolveInfo res = list.get(0);

            i.setComponent(new ComponentName(res.activityInfo.packageName,
                    res.activityInfo.name));

            startActivityForResult(i, CROP_FROM_CAMERA);
        }
}

Answer 4

protected void onActivityResult(int requestCode, int resultCode,
        Intent imageReturnedIntent) {
    super.onActivityResult(requestCode, resultCode, imageReturnedIntent);

    switch (requestCode) {
    case SELECT_PHOTO: //Select photo == 1
        if (resultCode == RESULT_OK) {
            try {
                final Uri imageUri = imageReturnedIntent.getData();
                Bitmap selectedImage = BitmapFactory
                        .decodeStream(getContentResolver().openInputStream(
                                imageUri));