Sqlite3 不能读写

insert returns error code 8 attempt to write a readonly database
Where is the database on the phone? In the resources directory, or did you copy it to the Documents directory? The resources directory is read-only.

android资源文件下的resource 或者raw文件下的 .db文件和ios打包的.db文件只有访问权限，如果要对数据库进行写入则必须重新copy数据库到指定文件目录，android可以copy到sdcard里面再进行写入；
objec-c代码:

/**
 *  copy db文件放入app目录
 *
 *  @param mDataBaseName 文件名
 */
+(void)copyDB2Document:(NSString *)mDataBaseName
{
    BOOL success;
    NSError *error;

    NSFileManager *filemanagr = [NSFileManager defaultManager];
    
    NSArray *path = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *dbPath = [path objectAtIndex:0];
    NSString *finalDBPath = [dbPath stringByAppendingPathComponent:mDataBaseName];
    success = [filemanagr fileExistsAtPath:finalDBPath];
    if (success) {
        
        NSLog(@"db 已copy到文件目录");
    }
    else
    {
        NSString *writableDBPath = [[[NSBundle mainBundle]resourcePath]stringByAppendingPathComponent:mDataBaseName];
        success = [filemanagr copyItemAtPath:writableDBPath toPath:finalDBPath error:&error];
    }
    if (!success) {
        NSLog(@"db 已copy到文件目录失败");
    }else{
        NSLog(@"db 已copy到文件目录成功");
    }
}

android代码：

/**
 * copy raw文件下面的db文件到应用data目录下
 * @param dbFileName 文件名称
 * @param mContext 上下文应用对象
 * @param rawResId 资源文件id
 */
public static void copyDB2Data(String dbFileName,Context mContext,int rawResId){
//获取应用包名
 String packageName = mContext.getPackageName();
 String filePath = "/data" + Environment.getDataDirectory().getAbsolutePath() + "/" + packageName;
 
 File file = new File(filePath);
// if(file.exists()){
//  file.delete();
// }
 if (!file.exists()) {
  // // 打开raw中得数据库文件，获得stream流
  InputStream stream = mContext.getResources().openRawResource(rawResId);
  try {

   // 将获取到的stream 流写入道data中
   FileOutputStream outputStream = new FileOutputStream(filePath);
   byte[] buffer = new byte[4096];
   int count = 0;
   while ((count = stream.read(buffer)) > 0) {
    outputStream.write(buffer, 0, count);
   }
   outputStream.close();
   stream.close();
  } catch (FileNotFoundException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  }
 }
}