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。我这样做,因为我需要使用我的应用程序中的Android API在 dropbox 上传图像/视频。构造函数接受文件类型的第四个参数。我不确定,作为文件传递什么,因为我搜索的所有示例都使用 url 显示在ImageView中选择的图像并制作位图。
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);
}
答案 0 :(得分:4)
您只需创建一个File
变量,其中包含您从图库中选择的图像路径。将您的OnActivityResult
更改为:
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);
}
}
答案 1 :(得分:1)
这适用于图像选择。也在 API 29,30 中进行了测试。如果有人需要它。
private static final int PICK_IMAGE = 5;
Intent intent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(Intent.createChooser(intent, "select image"),
PICK_IMAGE);
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == PICK_IMAGE && resultCode == RESULT_OK) {
Uri selectedImageUri = data.getData();
String selectedImagePath = getRealPathFromURIForGallery(selectedImageUri);
File imageFile = new File(selectedImagePath);
}
}
public String getRealPathFromURIForGallery(Uri uri) {
if (uri == null) {
return null;
}
String[] projection = {MediaStore.Images.Media.DATA};
Cursor cursor = this.getContentResolver().query(uri, projection, null,
null, null);
if (cursor != null) {
int column_index =
cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
assert false;
cursor.close();
return uri.getPath();
}
答案 2 :(得分:0)
你也可以尝试这个
public void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (requestCode == 1 && resultCode == RESULT_OK && data != null)
{
File destination = new File(Environment.getExternalStorageDirectory(),System.currentTimeMillis() + ".jpg");
//You will get file path of captured camera image
Bitmap photo = (Bitmap) data.getExtras().get("data");
iv_profile.setImageBitmap(photo);
}
}