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ContentResolver cr = MainActivity.this.getContentResolver();
Cursor cursor = cr.query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, null, null,
null, "date_modified DESC");
cursor.moveToFirst();
String[] strings= cursor.getColumnNames();
for (String s:strings){
int t= cursor.getType(cursor.getColumnIndex(s));
Log.i("YYY","--:"+s+"--:"+t);
int id=cursor.getInt(cursor.getColumnIndex("_id"));
int size=cursor.getInt(cursor.getColumnIndex("_size"));
int modified=cursor.getInt(cursor.getColumnIndex("date_modified"));
int datetoken=cursor.getInt(cursor.getColumnIndex("datetaken"));
int width=cursor.getInt(cursor.getColumnIndex("width"));
int height=cursor.getInt(cursor.getColumnIndex("height"));
int mini_thumb_magic=cursor.getInt(cursor.getColumnIndex("mini_thumb_magic"));
String data=cursor.getString(cursor.getColumnIndex("_data"));
String display_name=cursor.getString(cursor.getColumnIndex("_display_name"));
String mime_type=cursor.getString(cursor.getColumnIndex("mime_type"));
String title=cursor.getString(cursor.getColumnIndex("title"));
String bucket_id=cursor.getString(cursor.getColumnIndex("bucket_id"));
String bucket_display_name=cursor.getString(cursor.getColumnIndex("bucket_display_name"));
String description=cursor.getString(cursor.getColumnIndex("description"));
String picasa_id=cursor.getString(cursor.getColumnIndex("picasa_id"));
Log.i("YYY","id:"+id+"---size:"+size+"---modified:"+modified+"--datetaken:"+datetoken+"---width:"+width+
"---height:"+height+"--mini thumb magiv:"+mini_thumb_magic+"---data:"+data+"--display name:"+display_name
+"--mini type:"+mime_type+"=----title:"+title+"---bucket_id："+bucket_id+"---bucket display name:"+bucket_display_name
+"--description:"+description+"---picaser_id :"+picasa_id);
// cursor.get
}03-15 19:32:27.066 2663 2734 I YYY : --:_id--:1
03-15 19:32:27.066 2663 2734 I YYY : --:_data--:3
03-15 19:32:27.066 2663 2734 I YYY : --:_size--:1
03-15 19:32:27.066 2663 2734 I YYY : --:_display_name--:3
03-15 19:32:27.066 2663 2734 I YYY : --:mime_type--:3
03-15 19:32:27.066 2663 2734 I YYY : --:title--:3
03-15 19:32:27.066 2663 2734 I YYY : --:date_added--:1
03-15 19:32:27.066 2663 2734 I YYY : --:date_modified--:1
03-15 19:32:27.066 2663 2734 I YYY : --:description--:0
03-15 19:32:27.066 2663 2734 I YYY : --:picasa_id--:0
03-15 19:32:27.066 2663 2734 I YYY : --:isprivate--:0
03-15 19:32:27.066 2663 2734 I YYY : --:latitude--:0
03-15 19:32:27.066 2663 2734 I YYY : --:longitude--:0
03-15 19:32:27.066 2663 2734 I YYY : --:datetaken--:1
03-15 19:32:27.066 2663 2734 I YYY : --:orientation--:1
03-15 19:32:27.066 2663 2734 I YYY : --:mini_thumb_magic--:0
03-15 19:32:27.067 2663 2734 I YYY : --:bucket_id--:3
03-15 19:32:27.067 2663 2734 I YYY : --:bucket_display_name--:3
03-15 19:32:27.067 2663 2734 I YYY : --:width--:1
03-15 19:32:27.067 2663 2734 I YYY : --:height--:1
03-15 19:58:36.276 5337 5489 I YYY : --:_id--:1
03-15 19:58:36.277 5337 5489 I YYY : id:635808---size:8835648---modified:1552627965--datetaken:2144771395---width:4032---height:3024--mini thumb magiv:0---data:/storage/emulated/0/DCIM/Camera/IMG_20190315_133245.jpg--display name:IMG_20190315_133245.jpg--mini type:image/jpeg=----title:IMG_20190315_133245---bucket_id：-1739773001---bucket display name:Camera--description:null---picaser_id :null
03-15 19:58:36.277 5337 5489 I YYY : --:_data--:3参考 返回的类型
/**
* Contains meta data for all available images.
*/
public static final class Images {
public interface ImageColumns extends MediaColumns {
/**
* The description of the image
* <P>Type: TEXT</P>
*/
public static final String DESCRIPTION = "description";
/**
* The picasa id of the image
* <P>Type: TEXT</P>
*/
public static final String PICASA_ID = "picasa_id";
/**
* Whether the video should be published as public or private
* <P>Type: INTEGER</P>
*/
public static final String IS_PRIVATE = "isprivate";
/**
* The latitude where the image was captured.
* <P>Type: DOUBLE</P>
*/
public static final String LATITUDE = "latitude";
/**
* The longitude where the image was captured.
* <P>Type: DOUBLE</P>
*/
public static final String LONGITUDE = "longitude";
/**
* The date & time that the image was taken in units
* of milliseconds since jan 1, 1970.
* <P>Type: INTEGER</P>
*/
public static final String DATE_TAKEN = "datetaken";
/**
* The orientation for the image expressed as degrees.
* Only degrees 0, 90, 180, 270 will work.
* <P>Type: INTEGER</P>
*/
public static final String ORIENTATION = "orientation";
/**
* The mini thumb id.
* <P>Type: INTEGER</P>
*/
public static final String MINI_THUMB_MAGIC = "mini_thumb_magic";
/**
* The bucket id of the image. This is a read-only property that
* is automatically computed from the DATA column.
* <P>Type: TEXT</P>
*/
public static final String BUCKET_ID = "bucket_id";
/**
* The bucket display name of the image. This is a read-only property that
* is automatically computed from the DATA column.
* <P>Type: TEXT</P>
*/
public static final String BUCKET_DISPLAY_NAME = "bucket_display_name";
}