SQLiteDiskIOException：磁盘I / O错误在创建数据库时 [英] SQLiteDiskIOException: disk I/O error when creating database

问题描述

我在Android中使用这种code创建数据库：

I am creating a database in android using this code:

public class PackageDBHelper extends SQLiteOpenHelper{

//The Android's default system path of your application database.
private static String DB_PATH = "/data/data/com.myapp/databases/";

private static String DB_NAME = "my_db.db";

public SQLiteDatabase db; 

private final Context myContext;

public PackageDBHelper(Context context) {

    super(context, DB_NAME, null, 1);
    this.myContext = context;
}   
public void createDataBase() throws IOException{

    boolean dbExist = checkDataBase();

    if(dbExist){
        //do nothing - database already exist
    }else{

        //By calling this method and empty database will be created into the default system path
           //of your application so we are gonna be able to overwrite that database with our database.
        this.getReadableDatabase();  //error occurs here

        try {

            copyDataBase();

        } catch (IOException e) {

            throw new Error("Error copying database");

        }
    }

}

堆栈跟踪：

android.database.sqlite.SQLiteDiskIOException: disk I/O error
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1668)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1684)
at android.app.ActivityThread.access$1500(ActivityThread.java:124)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:948)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.app.ActivityThread.main(ActivityThread.java:3717)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:507)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:864)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:622)
at dalvik.system.NativeStart.main(Native Method)
Caused by: android.database.sqlite.SQLiteDiskIOException: disk I/O error
at android.database.sqlite.SQLiteDatabase.dbopen(Native Method)
at android.database.sqlite.SQLiteDatabase.<init>(SQLiteDatabase.java:1849)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:820)
at android.database.sqlite.SQLiteOpenHelper.getReadableDatabase(SQLiteOpenHelper.java:197)
at com.myapp.util.PackageDBHelper.createDataBase(PackageDBHelper.java:51)

这个程序是在市场上，我已经收到了一些错误报告。我一直没能复制它在我的任何设备，并且错误是比较少见的。我意识到DB_PATH或许应该从设备上获取，但不应该影响调用getReadableDatabase（）。

This app is on the market and I have received a few error reports. I have not been able to duplicate it on any of my devices, and the error is relatively rare. I realize the DB_PATH should probably be retrieved from the device, however that should not be effecting the call to getReadableDatabase().

任何想法？

推荐答案

我有同样的问题与HTC Desire HD的，和Android 2.1系统的Galaxy S

I had the same problem with HTC Desire HD, and Galaxy S on Android 2.1

使用以下为DB_PATH似乎来解决这个问题：

Using the following as for DB_PATH seems to fix the problem:

Environment.getDataDirectory() + "/data/YOUR_PACKAGE/databases/";

详细信息可以在这里 http://stackoverflow.com/a/4828540

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