把asset下的数据库xx.db复制到/data/data/package_name/xx.db下，无法复制啊 ！！什么问题 ？？ 应该不用root吧？ 这个目录本身是属于本应用程序的！理论上来说本应用程序是可以访问！
private SQLiteDatabase openDataBase(String path) {
Log.e("SQLite exist:", "" + new File(path).exists() + "::" + path);
// TODO Auto-generated method stub
try {
File file = new File(path);
if (!file.exists()) {// 判断数据库是否存在，若不存在执行导入操作，否则直接打开数据库
// InputStream ins = context.getResources().openRawResource(
// R.raw.ty_city);
file.createNewFile();
InputStream ins = context.getAssets().open("Chinacity.db");
FileOutputStream fos = new FileOutputStream(path);
byte[] buffer = new byte[BUFFER_SIZE];
int count = 0;
while ((count = ins.read(buffer)) > 0) {
fos.write(buffer, 0, count);
Log.e("buffer...", "" + count);
}
fos.close();
ins.close();
}
SQLiteDatabase sqLiteDatabase = context.openOrCreateDatabase(
DB_NAME, 0, null);
return sqLiteDatabase;
} catch (FileNotFoundException ffe) {
ffe.printStackTrace();
Log.e("DataBaseFile:", "file can't find");
} catch (IOException ioe) {
// TODO: handle exception
Log.e("IOException", ioe.getMessage());
ioe.printStackTrace();
}
return null;
}
报错
java.io.IOException: open failed: ENOENT (No such file or directory)//file.createNewFile();
Android 数据库
------解决方案--------------------
你那个path 或许方法不对
abstract File getFileStreamPath(String name)
Returns the absolute path on the filesystem where a file created with openFileOutput(String, int) is stored.
http://developer.android.com/reference/android/content/Context.html
------解决方案--------------------
是/data/data/package_name/databases/xx.db
另外，看看权限开了吧
------解决方案--------------------
import java.io.BufferedReader;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.content.res.AssetManager;
import android.os.Bundle;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import com.tarena.android.db.DatabaseHelper;
import com.tarena.android.entity.Airport;
public class AirportReadActivity extends Activity{