android-sqlite-kvs

key-value storage implemented by SQLite

How to use

install this library to your local maven repository

sh gradlew clean uploadArchives

add the following dependency entry to your build.gradle

compile 'jp.fkmsoft.libs:sqlite-kvs:1.+'

extends KVSImpl with your data class.

public class JsonKVS extends KVSImpl<JSONObject> {
    private static final String CHARSET = "utf-8";
    
    protected JsonKVS(Context context, String dbName) {
        super(context, dbName);
    }

    @Override
    protected JSONObject createFromBlob(byte[] bytes) {
        try {
            String body = new String(bytes, CHARSET);
            return new JSONObject(body);
        } catch (UnsupportedEncodingException e) {
            return new JSONObject();
        } catch (JSONException e2) {
            return new JSONObject();
        }
    }

    @Override
    protected byte[] toBytes(JSONObject value) {
        try {
            return value.toString().getBytes(CHARSET);
        } catch (UnsupportedEncodingException e) {
            return new byte[0];
        }
    }
}

use in your code.

// json1, json2 is JSONObject
KVS<JSONObject> kvs = new JsonKVS(getContext(), "appUser");
kvs.put("key1", json1);
kvs.put("key2", json2);
// commit changes
kvs.commit();

// gey by key
JSONObject data = kvs.get("key1");
JSONObject data2 = kvs.get("unknownKey");
assert data2 == null;

// close database
kvs.close();