Android - 从图库中选择图像并将其存储在文件类型变量中 [英] Android - Choose Image from Gallery and store it in a File type variable

问题描述

我是 Android 开发的新手.我希望从 Android 设备的图库中选择图像或视频.将其存储在 File 类型的变量中.我正在这样做，因为我需要使用我的应用程序中的 Android API 在 dropbox 上上传图像/视频.构造函数接受 File 类型的第四个参数.我不确定要作为文件传递什么，因为我搜索的所有示例都通过使用 url 并制作位图来显示在 ImageView 中选择的图像.

I am a new to Android Development. I wish to select an image or a video from the Gallery of an Android Device. Store it in a variable of typeFile. I am doing this, since I need to upload the image/video on dropbox using the Android API from my application. The constructor takes in the fourth parameter of the type File. I am not sure, what to pass as a file since all the examples I searched display the image chosen in an ImageView by using the url and making a bitmap.

imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));

这是代码，我有.

final Intent galleryIntent = new Intent(Intent.ACTION_GET_CONTENT);
//to get image and videos, I used a */"
galleryIntent.setType("*/*"); 
startActivityForResult(galleryIntent, 1);

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == 1 && resultCode == RESULT_OK) {               
    Uri selectedImageUri = data.getData();
    imagepath = getPath(selectedImageUri);                
    }
}

public String getPath(Uri uri) {
    String[] projection = { MediaStore.Images.Media.DATA };
    Cursor cursor = getContentResolver().query(uri, projection, null, null, null);
    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
    cursor.moveToFirst();                
    int columnIndex = cursor.getColumnIndex(projection[0]);
    String filePath = cursor.getString(columnIndex);
    cursor.close();        
    yourSelectedImage = BitmapFactory.decodeFile(filePath);
    return cursor.getString(column_index);
}

推荐答案

您只需使用您从图库中选择的图像路径创建一个 File 变量.将您的 OnActivityResult 更改为:

All you need to do is just create a File variable with the path of image which you've selected from gallery. Change your OnActivityResult as :

protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == 1 && resultCode == RESULT_OK) {               
    Uri selectedImageUri = data.getData();
    imagepath = getPath(selectedImageUri); 
    File imageFile = new File(imagepath);
    }
}

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