How to manage custom preference layout

Question

I have a custom preference with an image and two text and I need to change the image programmatically.

I am able to get the custom preference view and to find the ImageView in the layout using findViewById, but if I try to change the image this do not work.

Do I am wrong something?

PREFERENCE LAYOUT

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


    <ImageView
        android:id="@+id/imageforfacebook"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:padding="5dip"
        android:src="@drawable/icon" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical" >

        <TextView
            android:id="@+android:id/title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:fadingEdge="horizontal"
            android:singleLine="true"
            android:text="titolo"
            android:textAppearance="?android:attr/textAppearanceSmall"
            android:textSize="18sp" />

        <TextView
            android:id="@+android:id/summary"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignLeft="@android:id/title"
            android:layout_below="@android:id/title"
            android:maxLines="2"
            android:text="descrizione"
            android:textAppearance="?android:attr/textAppearanceSmall" />
    </LinearLayout>

</LinearLayout>

CODE TO CHANGE THE IMAGEVIEW CONTENT

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {

View v = (View) prefs_facebookimage.getView(null, null);
ImageView img = (ImageView) v.findViewById(R.id.imageforfacebook);
Uri uri = Uri.parse(path);
img.setImageURI(uri);

Answer 1

I tried getView routine but it doesn't work for me, finally I got it through with a custom Preference:

public class ImageViewPreference extends Preference {
    private ImageView mImageView;
    private Bitmap mPhoto;

    public ImageViewPreference(Context context, AttributeSet attrs) {
        super(context, attrs);
        this.setWidgetLayoutResource(R.layout.pref_account_image);
        if (mPhoto == null) {
            mPhoto = BitmapFactory.decodeResource(
                    getContext().getResources(), R.drawable.icon);
        }
    }

    @Override
    protected void onBindView(View view) {
        super.onBindView(view);
        mImage = (ImageView) view.findViewById(R.id.pref_imageView);
        mImage.setImageBitmap(mPhoto);
    }

    public void setImage(Intent imageData) {
        mPhoto = data.getParcelableExtra("data");
    }
}

And here is the Preference.xml:

<PreferenceCategory
    android:key="@string/pref_category_myNote_key"
    android:title="@string/pref_category_myNote" >
    <com.flounder.xeniaNote.view.ImageViewPreference
        android:key="@string/pref_image_key"
        android:title="@string/pref_image"
        android:widgetLayout="@layout/pref_account_image" />
</PreferenceCategory>

And call mImagePref.setImage to change your ImageView in the callback method onPreferenceClick.

I wish it helps! Good luck.