如何把.db文件从资产数据/数据​​/包名/安卓 [英] How to put .db file from assets to data/data/packagename/ android

问题描述

可能重复：结果
  <一href=\"http://stackoverflow.com/questions/9109438/how-to-use-an-existing-database-with-an-android-application\">How使用现有的数据库，一个Android应用程序

如何把从资产数据/数据​​/包名.db文件/不使用的资产.db文件复制的内容。我不希望创建数据库，因为其用武之地把.db文件的资产。我探讨，但所有人都再次创造DATABSE但我只希望直接把那.db文件。

how to put .db file from assets to data/data/packagename/ without using copying content of .db file in assets. I don't want to create database because its useless to put the .db file in assets. I explore on it but all are again creating databse but i only want to put that .db file directly.

推荐答案

使用

private void copyDataBase() throws IOException {

    // Open your local db as the input stream
    InputStream myInput = myContext.getAssets().open(DB_NAME);
    // Path to the just created empty db
    String outFileName =  "/data/data/"
            +getApplicationContext().getPackageName()
            + "/databases/" + DB_NAME;
    // Open the empty db as the output stream
    OutputStream myOutput = new FileOutputStream(outFileName);
    // transfer bytes from the inputfile to the outputfile
    byte[] buffer = new byte[1024];
    int length;
    while ((length = myInput.read(buffer)) > 0) {
        myOutput.write(buffer, 0, length);

    }
    // Close the streams
    myOutput.flush();
    myOutput.close();
    myInput.close();
}

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