Question

我有一个扩展ProviderTestCase2＆lt;＆gt;。

的测试类

我想用一些.db文件中的数据填充此测试类数据库。

是否有一些特定的方法将某个.db文件推送到ProviderTestCase2的模拟上下文中？

否则哪种方式更容易从.db文件填充数据库？！

非常感谢!!

Answer 1

如何从SD卡或类似的东西中复制预先存在的.db文件？这是一段快速完成此任务的代码：

private void importDBFile(File importDB) {
    String dataDir = Environment.getDataDirectory().getPath();
    String packageName = getPackageName();

    File importDir = new File(dataDir + "/data/" + packageName + "/databases/");
    if (!importDir.exists()) {
        Toast.makeText(this, "There was a problem importing the Database", Toast.LENGTH_SHORT).show();
        return;
    }

    File importFile = new File(importDir.getPath() + "/" + importDB.getName());

    try {
        importFile.createNewFile();
        copyDB(importDB, importFile);
        Toast.makeText(this, "Import Successful", Toast.LENGTH_SHORT).show();
    } catch (IOException ex) {
        Toast.makeText(this, "There was a problem importing the Database", Toast.LENGTH_SHORT).show();
    }
}

private void copyDB(File from, File to) throws IOException {
    FileChannel inChannel = new FileInputStream(from).getChannel();
    FileChannel outChannel = new FileOutputStream(to).getChannel();
    try {
        inChannel.transferTo(0, inChannel.size(), outChannel);
    } finally {
        if (inChannel != null)
            inChannel.close();
        if (outChannel != null)
            outChannel.close();
    }
}

希望这适用于您的场景

如何在Android中填充测试数据库？

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