本文整理汇总了C#中Activity.managedQuery方法的典型用法代码示例。如果您正苦于以下问题：C# Activity.managedQuery方法的具体用法？C# Activity.managedQuery怎么用？C# Activity.managedQuery使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Activity的用法示例。
在下文中一共展示了Activity.managedQuery方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: getRealPathFromURI
/// <summary>
/// Get the real file path from URI registered in media store
/// </summary>
/// <param name="contentUri">
/// URI registered in media store </param>
public static string getRealPathFromURI(Activity activity, Uri contentUri)
{
string releaseNumber = Build.VERSION.RELEASE;
if (releaseNumber != null)
{
/* ICS Version */
if (releaseNumber.Length > 0 && releaseNumber[0] == '4')
{
string[] proj = new string[] {MediaStore.Images.Media.DATA};
string strFileName = "";
CursorLoader cursorLoader = new CursorLoader(activity, contentUri, proj, null, null, null);
if (cursorLoader != null)
{
Cursor cursor = cursorLoader.loadInBackground();
if (cursor != null)
{
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
if (cursor.Count > 0)
{
strFileName = cursor.getString(column_index);
}
cursor.close();
}
}
return strFileName;
}
/* GB Version */
else if (releaseNumber.StartsWith("2.3", StringComparison.Ordinal))
{
string[] proj = new string[] {MediaStore.Images.Media.DATA};
string strFileName = "";
Cursor cursor = activity.managedQuery(contentUri, proj, null, null, null);
if (cursor != null)
{
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
if (cursor.Count > 0)
{
strFileName = cursor.getString(column_index);
}
cursor.close();
}
return strFileName;
}
}
// ---------------------
// Undefined Version
// ---------------------
/* GB, ICS Common */
string[] proj = new string[] {MediaStore.Images.Media.DATA};
string strFileName = "";
Cursor cursor = activity.managedQuery(contentUri, proj, null, null, null);
if (cursor != null)
{
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
// Use the Cursor manager in ICS
activity.startManagingCursor(cursor);
cursor.moveToFirst();
if (cursor.Count > 0)
{
strFileName = cursor.getString(column_index);
}
// cursor.close(); // If the cursor close use , This application is terminated .(In ICS Version)
activity.stopManagingCursor(cursor);
}
return strFileName;
}