Android 文件读写辅助类
package com.rc114.scanner;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.Outpu...
Android Sqlite数据库辅助类
package com.rc114.scanner;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.util.Log;
import org.json.JSONArray;
import org.json.JSONObject;
import java...