Question

我正在尝试使用SQLiteAssetHelper将预先填充的数据库复制到Android应用程序中。我的设备上安装了Android-7（Nvidia Shield和摩托罗拉手机）。从设置 - ＆gt; App-＆gt; MyApp我启用了日历，位置＆amp; 存储权限

我在Manifest文件中也有以下权限

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

当我将我的数据库保存在assets/databases/databases文件夹中时，我得到以下异常：

引起：com.readystatesoftware.sqliteasset.SQLiteAssetHelper $ SQLiteAssetException：无法将/data/user/0/com.funcheap.funmapsf/databases/databases/MySFfuncheapDatabase.db写入数据

当我将我的数据库保存在assets/databases文件夹中时，我得到以下异常：

引起：com.readystatesoftware.sqliteasset.SQLiteAssetHelper $ SQLiteAssetException：资产中缺少数据库/数据库/ MySFfuncheapDatabase.db文件（或.zip，.gz存档）或目标文件夹不可写

不幸的是，这SO question对我没有帮助

Answer 1

正如@miket所说，如果你引用内部路径Android将使用该引用我遇到了这个问题，这是我非常草率的测试代码注释掉了调用

public void getINTERNAL(){
    Context context = this;
    File file = new File(context.getFilesDir().getAbsolutePath());
    String NT = String.valueOf(file);
    THE_PATH = NT+"/";
    System.out.println("INTERNAL PATH =========> "+THE_PATH);
}


public void getAvailable(){

    //getINTERNAL();

    String state = Environment.getExternalStorageState();

    if (state.equals(Environment.MEDIA_MOUNTED) && (!state.equals(Environment.MEDIA_MOUNTED_READ_ONLY))) {

        File removable = ContextCompat.getExternalFilesDirs(this, null)[1];
        THE_PATH = String.valueOf(removable);
        if(THE_PATH.length() > 4) {
            //THE_PATH = THE_PATH.substring(0, THE_PATH.length() - 5);
            THE_PATH = THE_PATH + "/Documents/";
            System.out.println("new path ====> "+THE_PATH);
        }
        System.out.println("EXTERNAL PATH ====> " + THE_PATH);
        System.out.println("Internal Path used if EXTERNAL PATH = NULL ");
        //getINTERNAL(); DO NOT CALL HERE YOU WILL CHANGE THE_PATH TO internal
        // no need to set THE_PATH for internal storage it will default on its own
        // WHY DOES THIS HAPPEN THE_PATH variable is PUBLIC STATIC hence it is GLOBAL
    }
}

使用SQLiteAssetHelper类时出现异常

1 个答案: