xamarin android gridview mess up after scrolling





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i'm new to Xamarin android(which is very similar to android). I created a Gridview having images(from google images) with title the images stored in local db as a blob. when i scrolling it down its totally messing up. Here my code



activity_main.xml



<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:minWidth="25px"
android:minHeight="25px">
<android.support.design.widget.TabLayout
android:id="@+id/tablayout_navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#A5BFB6"
android:layout_alignParentTop="true"
android:elevation="6dp"
android:minHeight="?attr/actionBarSize"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"/>
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="2dp" />
</LinearLayout>


album1_fragment.xml



<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:fab="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"

android:id="@+id/album_frame_layout">

<GridView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/albumsGridView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:columnWidth="100dp"
android:numColumns="2"
android:stretchMode="columnWidth"
android:gravity="center"
/>

</FrameLayout>


album_adapter.xml



<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="5dp">

<ImageView
android:id="@+id/albumImageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="10px"
android:layout_gravity="center" />

<TextView
android:id="@+id/albumName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:fontFamily="trebuchet"
android:textSize="15sp"
android:lines="2"
android:layout_marginTop="5px"
android:textStyle="bold" />

</LinearLayout>


AlbumAdapter.cs



public class AlbumAdapter : BaseAdapter<Albums>
{
public List<Albums> albumData;
public List<Albums> _items;
Activity context;


public AlbumAdapter(Activity context, IEnumerable<Albums> albumData)
{
_items = albumData.OrderBy(s => s.AlbumName).ToList();

this.context = context;
}


public override Albums this[int position]
{
get
{
return _items[position];
}
}

public override int Count
{
get
{
return _items.Count;
}
}


public override long GetItemId(int position)
{
return position;
}

public override View GetView(int position, View convertView, ViewGroup parent)
{
var view = convertView;
var albums = _items[position];
AlbumHolder holder;

if (view == null)
{

view = LayoutInflater.From(parent.Context).Inflate(Resource.Layout.album_gridview_adapter, parent, false);

var albumImage = view.FindViewById<ImageView>(Resource.Id.albumImageView);
var albumName = view.FindViewById<TextView>(Resource.Id.albumName);
albumName.SetTextColor(Color.Black);


view.Tag = new AlbumHolder()
{
AlbumCover = albumImage,
AlbumName = albumName
};

holder = (AlbumHolder)view.Tag;
holder.AlbumCover.SetImageBitmap(ByteArrayToImageSourceConverter.ImageConverter(_items[position].AlbumCover));
holder.AlbumName.Text = _items[position].AlbumName;
}
else
{
holder = (AlbumHolder)view.Tag;
}

return view;
}

}


ByteArrayToImageSourceConverter : to convert byte data into bitmap



 public static class ByteArrayToImageSourceConverter
{

public static Bitmap ImageConverter(byte albumImage)
{
Bitmap bitmap = BitmapFactory.DecodeByteArray(albumImage, 0, albumImage.Length);

return bitmap;
}
}


here the output:
screen shot of my app



and how the above screen to convert like this:
screen shot of music player



Here the project source:https://github.com/udayoleti/XAMARIN



thanks in advance.










share|improve this question

























  • You are fetching instance of few controls incorrectly. var albumImage = view.. this should be holder.AlbumName=view.... If you are getting instances outside of holder than no meaning of using holder class. Even albumName.SetTextColor this should be holder.albumName.SetTextColor.

    – Arvindraja
    Nov 23 '18 at 9:28




















0















i'm new to Xamarin android(which is very similar to android). I created a Gridview having images(from google images) with title the images stored in local db as a blob. when i scrolling it down its totally messing up. Here my code



activity_main.xml



<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:minWidth="25px"
android:minHeight="25px">
<android.support.design.widget.TabLayout
android:id="@+id/tablayout_navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#A5BFB6"
android:layout_alignParentTop="true"
android:elevation="6dp"
android:minHeight="?attr/actionBarSize"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"/>
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="2dp" />
</LinearLayout>


album1_fragment.xml



<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:fab="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"

android:id="@+id/album_frame_layout">

<GridView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/albumsGridView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:columnWidth="100dp"
android:numColumns="2"
android:stretchMode="columnWidth"
android:gravity="center"
/>

</FrameLayout>


album_adapter.xml



<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="5dp">

<ImageView
android:id="@+id/albumImageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="10px"
android:layout_gravity="center" />

<TextView
android:id="@+id/albumName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:fontFamily="trebuchet"
android:textSize="15sp"
android:lines="2"
android:layout_marginTop="5px"
android:textStyle="bold" />

</LinearLayout>


AlbumAdapter.cs



public class AlbumAdapter : BaseAdapter<Albums>
{
public List<Albums> albumData;
public List<Albums> _items;
Activity context;


public AlbumAdapter(Activity context, IEnumerable<Albums> albumData)
{
_items = albumData.OrderBy(s => s.AlbumName).ToList();

this.context = context;
}


public override Albums this[int position]
{
get
{
return _items[position];
}
}

public override int Count
{
get
{
return _items.Count;
}
}


public override long GetItemId(int position)
{
return position;
}

public override View GetView(int position, View convertView, ViewGroup parent)
{
var view = convertView;
var albums = _items[position];
AlbumHolder holder;

if (view == null)
{

view = LayoutInflater.From(parent.Context).Inflate(Resource.Layout.album_gridview_adapter, parent, false);

var albumImage = view.FindViewById<ImageView>(Resource.Id.albumImageView);
var albumName = view.FindViewById<TextView>(Resource.Id.albumName);
albumName.SetTextColor(Color.Black);


view.Tag = new AlbumHolder()
{
AlbumCover = albumImage,
AlbumName = albumName
};

holder = (AlbumHolder)view.Tag;
holder.AlbumCover.SetImageBitmap(ByteArrayToImageSourceConverter.ImageConverter(_items[position].AlbumCover));
holder.AlbumName.Text = _items[position].AlbumName;
}
else
{
holder = (AlbumHolder)view.Tag;
}

return view;
}

}


ByteArrayToImageSourceConverter : to convert byte data into bitmap



 public static class ByteArrayToImageSourceConverter
{

public static Bitmap ImageConverter(byte albumImage)
{
Bitmap bitmap = BitmapFactory.DecodeByteArray(albumImage, 0, albumImage.Length);

return bitmap;
}
}


here the output:
screen shot of my app



and how the above screen to convert like this:
screen shot of music player



Here the project source:https://github.com/udayoleti/XAMARIN



thanks in advance.










share|improve this question

























  • You are fetching instance of few controls incorrectly. var albumImage = view.. this should be holder.AlbumName=view.... If you are getting instances outside of holder than no meaning of using holder class. Even albumName.SetTextColor this should be holder.albumName.SetTextColor.

    – Arvindraja
    Nov 23 '18 at 9:28
















0












0








0








i'm new to Xamarin android(which is very similar to android). I created a Gridview having images(from google images) with title the images stored in local db as a blob. when i scrolling it down its totally messing up. Here my code



activity_main.xml



<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:minWidth="25px"
android:minHeight="25px">
<android.support.design.widget.TabLayout
android:id="@+id/tablayout_navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#A5BFB6"
android:layout_alignParentTop="true"
android:elevation="6dp"
android:minHeight="?attr/actionBarSize"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"/>
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="2dp" />
</LinearLayout>


album1_fragment.xml



<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:fab="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"

android:id="@+id/album_frame_layout">

<GridView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/albumsGridView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:columnWidth="100dp"
android:numColumns="2"
android:stretchMode="columnWidth"
android:gravity="center"
/>

</FrameLayout>


album_adapter.xml



<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="5dp">

<ImageView
android:id="@+id/albumImageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="10px"
android:layout_gravity="center" />

<TextView
android:id="@+id/albumName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:fontFamily="trebuchet"
android:textSize="15sp"
android:lines="2"
android:layout_marginTop="5px"
android:textStyle="bold" />

</LinearLayout>


AlbumAdapter.cs



public class AlbumAdapter : BaseAdapter<Albums>
{
public List<Albums> albumData;
public List<Albums> _items;
Activity context;


public AlbumAdapter(Activity context, IEnumerable<Albums> albumData)
{
_items = albumData.OrderBy(s => s.AlbumName).ToList();

this.context = context;
}


public override Albums this[int position]
{
get
{
return _items[position];
}
}

public override int Count
{
get
{
return _items.Count;
}
}


public override long GetItemId(int position)
{
return position;
}

public override View GetView(int position, View convertView, ViewGroup parent)
{
var view = convertView;
var albums = _items[position];
AlbumHolder holder;

if (view == null)
{

view = LayoutInflater.From(parent.Context).Inflate(Resource.Layout.album_gridview_adapter, parent, false);

var albumImage = view.FindViewById<ImageView>(Resource.Id.albumImageView);
var albumName = view.FindViewById<TextView>(Resource.Id.albumName);
albumName.SetTextColor(Color.Black);


view.Tag = new AlbumHolder()
{
AlbumCover = albumImage,
AlbumName = albumName
};

holder = (AlbumHolder)view.Tag;
holder.AlbumCover.SetImageBitmap(ByteArrayToImageSourceConverter.ImageConverter(_items[position].AlbumCover));
holder.AlbumName.Text = _items[position].AlbumName;
}
else
{
holder = (AlbumHolder)view.Tag;
}

return view;
}

}


ByteArrayToImageSourceConverter : to convert byte data into bitmap



 public static class ByteArrayToImageSourceConverter
{

public static Bitmap ImageConverter(byte albumImage)
{
Bitmap bitmap = BitmapFactory.DecodeByteArray(albumImage, 0, albumImage.Length);

return bitmap;
}
}


here the output:
screen shot of my app



and how the above screen to convert like this:
screen shot of music player



Here the project source:https://github.com/udayoleti/XAMARIN



thanks in advance.










share|improve this question
















i'm new to Xamarin android(which is very similar to android). I created a Gridview having images(from google images) with title the images stored in local db as a blob. when i scrolling it down its totally messing up. Here my code



activity_main.xml



<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:minWidth="25px"
android:minHeight="25px">
<android.support.design.widget.TabLayout
android:id="@+id/tablayout_navigation"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#A5BFB6"
android:layout_alignParentTop="true"
android:elevation="6dp"
android:minHeight="?attr/actionBarSize"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"/>
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="2dp" />
</LinearLayout>


album1_fragment.xml



<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:fab="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"

android:id="@+id/album_frame_layout">

<GridView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/albumsGridView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:columnWidth="100dp"
android:numColumns="2"
android:stretchMode="columnWidth"
android:gravity="center"
/>

</FrameLayout>


album_adapter.xml



<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="5dp">

<ImageView
android:id="@+id/albumImageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="10px"
android:layout_gravity="center" />

<TextView
android:id="@+id/albumName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:fontFamily="trebuchet"
android:textSize="15sp"
android:lines="2"
android:layout_marginTop="5px"
android:textStyle="bold" />

</LinearLayout>


AlbumAdapter.cs



public class AlbumAdapter : BaseAdapter<Albums>
{
public List<Albums> albumData;
public List<Albums> _items;
Activity context;


public AlbumAdapter(Activity context, IEnumerable<Albums> albumData)
{
_items = albumData.OrderBy(s => s.AlbumName).ToList();

this.context = context;
}


public override Albums this[int position]
{
get
{
return _items[position];
}
}

public override int Count
{
get
{
return _items.Count;
}
}


public override long GetItemId(int position)
{
return position;
}

public override View GetView(int position, View convertView, ViewGroup parent)
{
var view = convertView;
var albums = _items[position];
AlbumHolder holder;

if (view == null)
{

view = LayoutInflater.From(parent.Context).Inflate(Resource.Layout.album_gridview_adapter, parent, false);

var albumImage = view.FindViewById<ImageView>(Resource.Id.albumImageView);
var albumName = view.FindViewById<TextView>(Resource.Id.albumName);
albumName.SetTextColor(Color.Black);


view.Tag = new AlbumHolder()
{
AlbumCover = albumImage,
AlbumName = albumName
};

holder = (AlbumHolder)view.Tag;
holder.AlbumCover.SetImageBitmap(ByteArrayToImageSourceConverter.ImageConverter(_items[position].AlbumCover));
holder.AlbumName.Text = _items[position].AlbumName;
}
else
{
holder = (AlbumHolder)view.Tag;
}

return view;
}

}


ByteArrayToImageSourceConverter : to convert byte data into bitmap



 public static class ByteArrayToImageSourceConverter
{

public static Bitmap ImageConverter(byte albumImage)
{
Bitmap bitmap = BitmapFactory.DecodeByteArray(albumImage, 0, albumImage.Length);

return bitmap;
}
}


here the output:
screen shot of my app



and how the above screen to convert like this:
screen shot of music player



Here the project source:https://github.com/udayoleti/XAMARIN



thanks in advance.







android xamarin xamarin.android android-gridview






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 23 '18 at 9:30









Arvindraja

2,96931233




2,96931233










asked Nov 22 '18 at 17:59









Uday OletiUday Oleti

33




33













  • You are fetching instance of few controls incorrectly. var albumImage = view.. this should be holder.AlbumName=view.... If you are getting instances outside of holder than no meaning of using holder class. Even albumName.SetTextColor this should be holder.albumName.SetTextColor.

    – Arvindraja
    Nov 23 '18 at 9:28





















  • You are fetching instance of few controls incorrectly. var albumImage = view.. this should be holder.AlbumName=view.... If you are getting instances outside of holder than no meaning of using holder class. Even albumName.SetTextColor this should be holder.albumName.SetTextColor.

    – Arvindraja
    Nov 23 '18 at 9:28



















You are fetching instance of few controls incorrectly. var albumImage = view.. this should be holder.AlbumName=view.... If you are getting instances outside of holder than no meaning of using holder class. Even albumName.SetTextColor this should be holder.albumName.SetTextColor.

– Arvindraja
Nov 23 '18 at 9:28







You are fetching instance of few controls incorrectly. var albumImage = view.. this should be holder.AlbumName=view.... If you are getting instances outside of holder than no meaning of using holder class. Even albumName.SetTextColor this should be holder.albumName.SetTextColor.

– Arvindraja
Nov 23 '18 at 9:28














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