DatabaseExportUtil.java

package com.cheng.utils.sqlite;

import android.content.Context;
import android.os.Environment;
import android.text.TextUtils;

import com.cheng.utils.Logger;
import com.cheng.utils.file.FileUtil;

/**
 * 应用数据库导出工具类
 */
public final class DatabaseExportUtil {

    static {
        Logger.TAG = "DatabaseExportUtils";
    }
    /**
     * Don't let anyone instantiate this class.
     */
    private DatabaseExportUtil() {
        throw new Error("Do not need instantiate!");
    }

    /**
     * 开始导出数据 此操作比较耗时,建议在线程中进行
     * @param context      上下文
     * @param targetFile   目标文件
     * @param databaseName 要拷贝的数据库文件名
     * @return 是否倒出成功
     */
    public boolean startExportDatabase(Context context, String targetFile,
                                       String databaseName) {
        Logger.d("start export ...");
        if (!Environment.MEDIA_MOUNTED.equals(Environment
                .getExternalStorageState())) {
            Logger.d("cannot find SDCard");
            return false;
        }
        String sourceFilePath = Environment.getDataDirectory() + "/data/"
                + context.getPackageName() + "/databases/" + databaseName;
        String destFilePath = Environment.getExternalStorageDirectory()
                + (TextUtils.isEmpty(targetFile) ? (context.getPackageName() + ".db")
                : targetFile);
        boolean isCopySuccess = FileUtil
                .copyFile(sourceFilePath, destFilePath);
        if (isCopySuccess) {
            Logger.d("copy database file success. target file : "
                    + destFilePath);
        } else {
            Logger.d("copy database file failure");
        }
        return isCopySuccess;
    }
}