Question

最近我开始学习Kotlin。在拥有一些基本功能后，我被图像选择器困住了。

使用Kotlin是否有任何特定的方式从图库和相机中选择图像？或者我应该在我们的普通Java代码中实现，然后从Kotlin文件中调用它？

Java代码：

Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE);

使用Kotlin执行此操作还有其他差异吗？

Answer 1

这里是一个用于选择图像和捕获图像的示例功能代码：

 fun selectImageInAlbum() {
        val intent = Intent(Intent.ACTION_GET_CONTENT)
        intent.type = "image/*"
        if (intent.resolveActivity(packageManager) != null) {
            startActivityForResult(intent, REQUEST_SELECT_IMAGE_IN_ALBUM)
        }
    }
 fun takePhoto() {
        val intent1 = Intent(MediaStore.ACTION_IMAGE_CAPTURE)
        if (intent1.resolveActivity(packageManager) != null) {
            startActivityForResult(intent1, REQUEST_TAKE_PHOTO)
        }
    }
 companion object {
        private val REQUEST_TAKE_PHOTO = 0
        private val REQUEST_SELECT_IMAGE_IN_ALBUM = 1
    }

另外，不要忘记将其添加到您的清单文件中：

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

我希望我能帮忙

Answer 2

val intent = Intent()
intent.type = "image/*"
intent.action = Intent.ACTION_GET_CONTENT
startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE)

override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent) {
    super.onActivityResult(requestCode, resultCode, data)
}

Answer 3

你也可以在Kotlin写一下。

val intent = Intent()
intent.type = "image/*"
intent.action = Intent.ACTION_GET_CONTENT
startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE);

Answer 4

您可以尝试以下操作：

val galleryIntent = Intent(Intent.ACTION_PICK,
                    android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI)
startActivityForResult(galleryIntent, requestcode)

Answer 5

fun Fragment.openGalleryForPickingImage(code: Int) {
    Intent().apply {
        type = "image/*"
        action = Intent.ACTION_GET_CONTENT
        startActivityForResult(Intent.createChooser(this, getString(R.string.select_file)), code)
    }
}

问题在于，获取真实路径的功能不起作用，因为内容解析器找不到对应于MediaStore.Images.Media.DATA的columnIndex 相反，您需要这样做：

fun Fragment.openGalleryForPickingImage(code: Int) {
    Intent(
        Intent.ACTION_PICK,
        android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI
    ).apply {
        startActivityForResult(Intent.createChooser(this, getString(R.string.select_file)), code)
    }
}

Answer 6

kotlin：

fun getPhoto() {
    val intent = Intent(Intent.ACTION_PICK,MediaStore.Images.Media.EXTERNAL_CONTENT_URI)
    startActivityForResult(intent,1)
}

使用Kotlin从图库中选择图像

6 个答案: