Android Utililty Methods ContentResolver Read

List of utility methods to do ContentResolver Read

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Description

The list of methods to do ContentResolver Read are organized into topic(s).

Method

StringfileUriToBase64(Uri uri, ContentResolver resolver)
File uri to base64. 
String encodedBase64 = "";
try {
    byte[] bytes = readBytes(uri, resolver);
    encodedBase64 = Base64.encodeToString(bytes, 0);
} catch (IOException e1) {
    e1.printStackTrace();
return encodedBase64;
...
byte[]readBytes(Uri uri, ContentResolver resolver)
Read bytes. 
InputStream inputStream = resolver.openInputStream(uri);
ByteArrayOutputStream byteBuffer = new ByteArrayOutputStream();
int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
int len = 0;
while ((len = inputStream.read(buffer)) != -1) {
    byteBuffer.write(buffer, 0, len);
return byteBuffer.toByteArray();
JSONArraygetContentFromProvider( ContentResolver contentResolver, Uri uri, String[] valueTypes)
get Content From Provider 
Cursor cursor = contentResolver.query(uri, null, null, null, null);
JSONArray array = new JSONArray();
if (cursor != null) {
    while (cursor.moveToNext()) {
        try {
            JSONObject obj = new JSONObject();
            for (int i = 0; i < valueTypes.length; i++) {
                String value = cursor.getString(cursor
...
intgetExifOrientation(ContentResolver cr, Uri uri)
get Exif Orientation 
int degree = 0;
if (uri.getScheme().equals("content")) {
    String[] projection = { Images.ImageColumns.ORIENTATION };
    Cursor c = cr.query(uri, projection, null, null, null);
    if (c.moveToFirst()) {
        degree = c.getInt(0);
} else if (uri.getScheme().equals("file")) {
...