使用内部存储从android手机上的图库中提取图像 [英] fetching images from gallery on android phones with internal storage
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问题描述
您好我正在开发一个Android Gallery应用程序,我从内置库中获取图像并显示它。我使用下面的代码
String [] projection = {MediaStore.Images.Thumbnails._ID};
Cursor cursor = getContentResolver()。query(MediaStore.Images.Thumbnails.INTERNAL_CONTENT_URI,
projection,//返回
的哪些列为null,//返回所有行
null,
null);
int columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Thumbnails._ID);
int size = cursor.getCount();
//如果大小为0,SD卡上没有图像。
if(size == 0)
{
Log.e(size 0,0);
$ b 问题是当我在只有内部存储的电话上运行此代码时(Galaxy Nexus)我得到说大小为零的日志,即使有内置图库中的图像。我该如何解决这个问题。
请帮助。谢谢!
解决方案要获得图库图片列表,您可以尝试此操作。
String [] projection = new String [] {
MediaStore.Images.Media._ID,
MediaStore.Images.Media。 BUCKET_DISPLAY_NAME,
MediaStore.Images.Media.DATE_TAKEN
};
Uri imageUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
Cursor cur = getContentResolver()。query(imageUri,
projection,//要返回的列
null,//要返回的行(所有行)
null,//选择参数(无)
null //排序
);
Log.i(图片计数,count =+ cur.getCount());
Hi I am developing an Android Gallery app where I am fetching images from built in gallery and displaying it.I am using the code as below
String[] projection = {MediaStore.Images.Thumbnails._ID};
Cursor cursor = getContentResolver().query(MediaStore.Images.Thumbnails.INTERNAL_CONTENT_URI,
projection, // Which columns to return
null, // Return all rows
null,
null);
int columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Thumbnails._ID);
int size = cursor.getCount();
// If size is 0, there are no images on the SD Card.
if (size == 0)
{
Log.e("size 0","0");
}
The Problem is when I run this code on Phones having only internal storage (Galaxy Nexus) I am getting Log which says size as Zero even though there are images in built in gallery. How do I resolve this.
Please Help.Thanks!
解决方案 To get list of Gallery images you can try this
String[] projection = new String[]{
MediaStore.Images.Media._ID,
MediaStore.Images.Media.BUCKET_DISPLAY_NAME,
MediaStore.Images.Media.DATE_TAKEN
};
Uri imageUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
Cursor cur = getContentResolver().query(imageUri,
projection, // Which columns to return
null, // Which rows to return (all rows)
null, // Selection arguments (none)
null // Ordering
);
Log.i("Images Count"," count="+cur.getCount());
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