Android Open Source - PhoneProfiles_Eclipse Image View Preference

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License

The source code is released under:
Apache License
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Java Source Code

package sk.henrichg.phoneprofiles;
/*from  w ww.java2  s .c  om*/
import android.content.Context;
import android.content.Intent;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.os.Parcel;
import android.os.Parcelable;
import android.preference.Preference;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ImageView;

public class ImageViewPreference extends Preference {
  
  private String imageIdentifier;
  private boolean isImageResourceID;
  
  private String imageSource;

  private ImageView imageView;
  private Context prefContext;
  
  CharSequence preferenceTitle;
  
  public static int RESULT_LOAD_IMAGE = 1970;
  
  public ImageViewPreference(Context context, AttributeSet attrs)
  {
    super(context, attrs);
    
    TypedArray typedArray = context.obtainStyledAttributes(attrs,
        R.styleable.ImageViewPreference);

    // resource, resource_file, file
    imageSource = typedArray.getString(
      R.styleable.ImageViewPreference_imageSource);
    

    if (imageSource.equals("file"))
    {
      imageIdentifier = "-";
      isImageResourceID = false;
    }
    else
    {
      imageIdentifier = GlobalData.PROFILE_ICON_DEFAULT;
      isImageResourceID = true;
    }
    
    prefContext = context;
    
    preferenceTitle = getTitle();
    
    //Log.d("ImageViewPreference", "title="+preferenceTitle);
    //Log.d("ImageViewPreference", "imageSource="+imageSource);
    
    setWidgetLayoutResource(R.layout.imageview_preference); // resource na layout custom preference - TextView-ImageView
    
    typedArray.recycle();
    
  }
  
  //@Override
  protected void onBindView(View view)
  {
    super.onBindView(view);

    //Log.d("ImageViewPreference.onBindView", "imageIdentifier="+imageIdentifier);
    //Log.d("ImageViewPreference.onBindView", "isImageResourceID="+isImageResourceID);
    
    //imageTitle = (TextView)view.findViewById(R.id.imageview_pref_label);  // resource na image title
    //imageTitle.setText(preferenceTitle);
    
    imageView = (ImageView)view.findViewById(R.id.imageview_pref_imageview); // resource na Textview v custom preference layoute

      if (imageView != null)
      {
        if (isImageResourceID)
        {
          // je to resource id
          int res = prefContext.getResources().getIdentifier(imageIdentifier, "drawable", prefContext.getPackageName());
          //Log.d("ImageViewPreference.onBindView", "resource="+res);
          imageView.setImageResource(res); // resource na ikonu
        }
        else
        {
          // je to file
          //Log.d("ImageViewPreference.onBindView", "file="+imageIdentifier);

            Resources resources = prefContext.getResources();
            int height = (int) resources.getDimension(android.R.dimen.app_icon_size);
            int width = (int) resources.getDimension(android.R.dimen.app_icon_size);
            Bitmap bitmap = BitmapManipulator.resampleBitmap(imageIdentifier, width, height);
            
            //if (bitmap != null)
              imageView.setImageBitmap(bitmap);
        }
      }
  }
  
  @Override
  protected void onClick()
  {
    // klik na preference

    //Log.d("ImageViewPreference.onClick", "imageResourceID="+imageIdentifier);
    //Log.d("ImageViewPreference.onClick", "imageSource="+imageSource);
    
    if (imageSource.equals("resource_file") || imageSource.equals("resource"))
    {
      final ImageViewPreferenceDialog dialog = new ImageViewPreferenceDialog(prefContext, this, imageSource,
                                          imageIdentifier, isImageResourceID);
      dialog.setTitle(R.string.title_activity_image_view_preference_dialog);
      dialog.show();
    }
    else
    {
      // zavolat galeriu na vyzdvihnutie image
      startGallery();
    }
    
  }
  
  @Override
  protected Object onGetDefaultValue(TypedArray a, int index)
  {
    super.onGetDefaultValue(a, index);
    
    return a.getString(index);  // ikona bude vratena ako retazec
  }
  
  @Override
  protected void onSetInitialValue(boolean restoreValue, Object defaultValue)
  {
    if (restoreValue) {
      // restore state
      String value = getPersistedString(imageIdentifier+"|"+((isImageResourceID) ? "1" : "0"));
      String[] splits = value.split("\\|");
      try {
        imageIdentifier = splits[0];
      } catch (Exception e) {
        imageIdentifier = GlobalData.PROFILE_ICON_DEFAULT;
      }
      try {
        isImageResourceID = (splits[1].equals("1")) ? true : false;
      } catch (Exception e) {
        isImageResourceID = true;
      }
    }
    else {
      // set state
      String value = (String) defaultValue;
      String[] splits = value.split("\\|");
      try {
        imageIdentifier = splits[0];
      } catch (Exception e) {
        imageIdentifier = GlobalData.PROFILE_ICON_DEFAULT;
      }
      try {
        isImageResourceID = (splits[1].equals("1")) ? true : false;
      } catch (Exception e) {
        isImageResourceID = true;
      }
      persistString(value);
    }
  }
  
  @Override
  protected Parcelable onSaveInstanceState()
  {
    // ulozime instance state - napriklad kvoli zmene orientacie
    
    final Parcelable superState = super.onSaveInstanceState();
    if (isPersistent()) {
      // netreba ukladat, je ulozene persistentne
      return superState;
    }
    
    // ulozenie istance state
    final SavedState myState = new SavedState(superState);
    myState.imageIdentifierAndType = imageIdentifier+"|"+((isImageResourceID) ? "1" : "0");
    return myState;
    
  }
  
  @Override
  protected void onRestoreInstanceState(Parcelable state)
  {
    if (!state.getClass().equals(SavedState.class)) {
      // Didn't save state for us in onSaveInstanceState
      super.onRestoreInstanceState(state);
      return;
    }
    
    // restore instance state
    SavedState myState = (SavedState)state;
    super.onRestoreInstanceState(myState.getSuperState());
    String value = (String) myState.imageIdentifierAndType;
    String[] splits = value.split("\\|");
    try {
      imageIdentifier = splits[0];
    } catch (Exception e) {
      imageIdentifier = GlobalData.PROFILE_ICON_DEFAULT;
    }
    try {
      isImageResourceID = (splits[1].equals("1")) ? true : false;
    } catch (Exception e) {
      isImageResourceID = true;
    }
    notifyChanged();
  }
  
  public String getImageIdentifier()
  {
    return imageIdentifier;
  }
  
  public boolean getIsImageResourceID()
  {
    return isImageResourceID;
  }
  
  public void setImageIdentifierAndType(String newImageIdentifier, boolean newIsImageResourceID)
  {
    String newValue = newImageIdentifier+"|"+((newIsImageResourceID) ? "1" : "0");

    if (!callChangeListener(newValue)) {
      // nema sa nova hodnota zapisat
      return;
    }

    String[] splits = newValue.split("\\|");
    try {
      imageIdentifier = splits[0];
    } catch (Exception e) {
      imageIdentifier = GlobalData.PROFILE_ICON_DEFAULT;
    }
    try {
      isImageResourceID = (splits[1].equals("1")) ? true : false;
    } catch (Exception e) {
      isImageResourceID = true;
    }

    // zapis do preferences
    persistString(newValue);
    
    // Data sa zmenili,notifikujeme
    notifyChanged();
    
  }
  
  public void startGallery()
  {
    Intent intent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
    
    // hm, neda sa ziskat aktivita z preference, tak vyuzivam static metodu
    ProfilePreferencesFragment.setChangedImageViewPreference(this);
    ProfilePreferencesFragment.getPreferencesActivity().startActivityForResult(intent, RESULT_LOAD_IMAGE);
    
  }

  
  // SavedState class
  private static class SavedState extends BaseSavedState
  {
    String imageIdentifierAndType;
    
    public SavedState(Parcel source)
    {
      super(source);
      
      // restore image identifier and type
      imageIdentifierAndType = source.readString();
    }
    
    @Override
    public void writeToParcel(Parcel dest, int flags)
    {
      super.writeToParcel(dest, flags);
      
      // save image identifier and type
      dest.writeString(imageIdentifierAndType);
    }
    
    public SavedState(Parcelable superState)
    {
      super(superState);
    }
    
    @SuppressWarnings("unused")
    public static final Parcelable.Creator<SavedState> CREATOR =
        new Parcelable.Creator<SavedState>() {
      public SavedState createFromParcel(Parcel in) 
      {
        return new SavedState(in);
      }
      public SavedState[] newArray(int size)
      {
        return new SavedState[size];
      }
        
    };
  
  }
}
Java Source Code List
