MediaStore usage example in Android

Package cn.com; import java. io. IOException; import android. app. activity; import android. content. contentResolver; import android. database. cursor; import android. media. exifInterface; import android. OS. bundle; import android. provider. mediaStore; public class MainActivity extends Activity {@ Override public void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. main); // Test 1 // getVideosInfo (); // Test 2 // getPhotosInfo (); // Test 3 getAudiosInfo ();} // obtain all the video information on the device. private void getVideosInfo () {ContentResolver contentResolver = getContentResolver (); String [] videoColumns = new String [] {MediaStore. video. media. _ ID, MediaStore. video. media. DATA, MediaStore. video. media. TITLE, MediaStore. video. media. MIME_TYPE}; // both methods can be used // Cursor cursor = // this. managedQuery (MediaStore. video. media. EXTERNAL_CONTENT_URI, mediaColumns, null, null); Cursor cursor = contentResolver. query (MediaStore. video. media. EXTERNAL_CONTENT_URI, videoColumns, null, null); while (cursor. moveToNext () {String _ id = cursor. getString (cursor. getColumnIndexOrThrow (MediaStore. video. media. _ ID); String filePath = cursor. getString (cursor. getColumnIndexOrThrow (MediaStore. video. media. DATA); String title = cursor. getString (cursor. getColumnIndexOrThrow (MediaStore. video. media. TITLE); String mime_type = cursor. getString (cursor. getColumnIndexOrThrow (MediaStore. video. media. MIME_TYPE); System. out. println ("_ id =" + _ id); System. out. println ("title =" + title); System. out. println ("filePath =" + filePath); System. out. println ("mime_type =" + mime_type) ;}// obtain all the photo information on the device. private void getPhotosInfo () {ContentResolver contentResolver = getContentResolver (); string [] photoColumns = new String [] {MediaStore. images. media. _ ID, MediaStore. images. media. DATA, MediaStore. images. media. TITLE, MediaStore. images. media. MIME_TYPE, MediaStore. images. media. SIZE, MediaStore. images. media. ORIENTATION}; // either of the two methods can be // Cursor cursor = // this. managedQuery (MediaStore. images. media. EXTERNAL_CONTENT_URI, mediaColumns, null, null); Cursor cursor = contentResolver. query (MediaStore. images. media. EXTERNAL_CONTENT_URI, photoColumns, null); while (cursor. moveToNext () {String _ id = cursor. getString (cursor. getColumnIndexOrThrow (MediaStore. images. media. _ ID); String filePath = cursor. getString (cursor. getColumnIndexOrThrow (MediaStore. images. media. DATA); String title = cursor. getString (cursor. getColumnIndexOrThrow (MediaStore. images. media. TITLE); String mime_type = cursor. getString (cursor. getColumnIndexOrThrow (MediaStore. images. media. MIME_TYPE); String size = cursor. getString (cursor. getColumnIndexOrThrow (MediaStore. images. media. SIZE); // obtain the image rotation angle method-String orientation0 = cursor. getString (cursor. getColumnIndexOrThrow (MediaStore. images. media. ORIENTATION); System. out. println ("_ id =" + _ id); System. out. println ("size =" + size); System. out. println ("title =" + title); System. out. println ("filePath =" + filePath); System. out. println ("mime_type =" + mime_type); System. out. println ("first orientation0 =" + orientation0); try {ExifInterface exifInterface = new ExifInterface (filePath); String image_length = exifInterface. getAttribute (ExifInterface. TAG_IMAGE_LENGTH); String image_width = exifInterface. getAttribute (ExifInterface. TAG_IMAGE_WIDTH); String orientation1 = exifInterface. getAttribute (ExifInterface. TAG_ORIENTATION); String dateTime = exifInterface. getAttribute (ExifInterface. TAG_DATETIME); System. out. println ("image_length =" + image_length); System. out. println ("image_width =" + image_width); System. out. println ("dateTime =" + dateTime); // obtain the image rotation angle. method 2 // use the ExifInterface source code for analysis. // The switch (Integer. valueOf (orientation1) {case 1: System. out. println ("Second Rotation Angle =" + 0); break; case 2: // matrix. invert (matrix); break; case 3: // matrix. setRotate (180); System. out. println ("Second Rotation Angle =" + 180); break; case 4: // matrix. invert (matrix); // matrix. setRotate (180); System. out. println ("Second Rotation Angle =" + 180); break; case 5: // matrix. setRotate (90); // matrix. invert (matrix); System. out. println ("Second Rotation Angle =" + 90); break; case 6: // matrix. setRotate (90); System. out. println ("Second Rotation Angle =" + 90); break; case 7: // matrix. invert (matrix); // matrix. setRotate (90); System. out. println ("Second Rotation Angle =" + 90); break; case 8: // matrix. setRotate (270); System. out. println ("Second Rotation Angle =" + 270); break; default: break;} System. out. println ("xxxxxxxxxxxxxxxxxxxxx");} catch (IOException e) {e. printStackTrace () ;}}// obtain all the Audio Information on the device. private void getAudiosInfo () {ContentResolver contentResolver = getContentResolver (); string [] audioColumns = new String [] {MediaStore. audio. media. _ ID, MediaStore. audio. media. DATA, MediaStore. audio. media. TITLE, MediaStore. audio. media. MIME_TYPE}; // both methods can be used // Cursor cursor = // this. managedQuery (MediaStore. audio. media. EXTERNAL_CONTENT_URI, mediaColumns, null, null); Cursor cursor = contentResolver. query (MediaStore. audio. media. EXTERNAL_CONTENT_URI, audioColumns, null); while (cursor. moveToNext () {String _ id = cursor. getString (cursor. getColumnIndexOrThrow (MediaStore. audio. media. _ ID); String filePath = cursor. getString (cursor. getColumnIndexOrThrow (MediaStore. audio. media. DATA); String title = cursor. getString (cursor. getColumnIndexOrThrow (MediaStore. audio. media. TITLE); String mime_type = cursor. getString (cursor. getColumnIndexOrThrow (MediaStore. audio. media. MIME_TYPE); System. out. println ("_ id =" + _ id); System. out. println ("title =" + title); System. out. println ("filePath =" + filePath); System. out. println ("mime_type =" + mime_type );}}}