Android SQLite数据库赢得';在测试过程中,不要被推到手机前
我的sqlite数据库在我的资产文件夹中。当我在模拟器或我的设备上测试我的应用程序时,db名为foo.db,它总是说不存在db,创建空白db。我的数据库加载了数据,我想把它推到手机或模拟器上进行测试。为什么这不起作用 下面是我的应用程序中检查数据库是否存在的部分。。。但它从未找到它。我已经在调试模式下运行了它,DB_路径和DB_名称都有正确的值,但每次都会创建一个空数据库 我忽略了什么Android SQLite数据库赢得';在测试过程中,不要被推到手机前,android,sqlite,Android,Sqlite,我的sqlite数据库在我的资产文件夹中。当我在模拟器或我的设备上测试我的应用程序时,db名为foo.db,它总是说不存在db,创建空白db。我的数据库加载了数据,我想把它推到手机或模拟器上进行测试。为什么这不起作用 下面是我的应用程序中检查数据库是否存在的部分。。。但它从未找到它。我已经在调试模式下运行了它,DB_路径和DB_名称都有正确的值,但每次都会创建一个空数据库 我忽略了什么 /** * Called when the activity is first created. */ @
/**
* Called when the activity is first created.
*/
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.listpage);
this.myDbHelper = new DataBaseHelper(this);
try {
myDbHelper.createDataBase();
} catch (IOException ioe) {
throw new Error("Unable to create database");
}
try {
myDbHelper.openDataBase();
} catch (SQLException sqle) {
throw sqle;
}
}
/**
* Creates a empty database on the system and rewrites it with your own database.
*/
public void createDataBase() throws IOException {
boolean dbExist = checkDataBase();
if (dbExist) {
//do nothing - database already exist
System.out.println("DB alrady exists comment this out before your deply");
} else {
System.out.println("an empty DB is beng created comment this out before your deply");
//By calling this method an 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();
try {
copyDataBase();
} catch (IOException e) {
throw new Error("Error copying database");
}
}
}
/**
* Check if the database already exist to avoid re-copying the file each time you open the
* application.
*
* @return true if it exists, false if it doesn't
*/
private boolean checkDataBase() {
SQLiteDatabase checkDB = null;
try {
String myPath = DB_PATH + DB_NAME;
checkDB = SQLiteDatabase.openDatabase(myPath, null, SQLiteDatabase.OPEN_READONLY);
} catch (SQLiteException e) {
//database does't exist yet.
}
if (checkDB != null) {
checkDB.close();
}
return checkDB != null ? true : false;
}
你如何访问这个?通过“Assets\”或通过执行私有静态字符串DB_PATH=Environment.getExternalStorageDirectory().toString()+“/data/my_package_name/databases/”;Context.getFilesDir().getPath()+Context.getApplicationContext().getPackageName()+“/databases/”;这是路吗?