Android Open Source - sana Picture Element

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License

The source code is released under:
Copyright (c) 2010, Moca All rights reserved. The source code for Moca is licensed under the BSD license as follows: Redistribution and use in source and binary forms, with or without modification, ...
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Java Source Code

package org.moca.procedure;
//from w w w  .j  av  a2 s .c o m
import java.io.IOException;
import java.util.ArrayList;

import org.moca.ImagePreviewDialog;
import org.moca.ScalingImageAdapter;
import org.moca.activity.ProcedureRunner;
import org.moca.db.MocaDB;
import org.moca.db.MocaDB.ImageSQLFormat;
import org.w3c.dom.Node;

import android.app.Activity;
import android.content.ContentUris;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.util.Log;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.Gallery;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.LinearLayout.LayoutParams;

/**
 * PictureElement is a ProcedureElement that allows a user to take photos. It displays
 * thumbnails of images that have been taken, allows a user to bring up the camera to take 
 * new ones, and allows a user to click on a thumbnail to bring up a dialog allowing for
 * closer image review and examination.
 */
public class PictureElement extends ProcedureElement implements OnClickListener, OnItemClickListener, OnItemLongClickListener {
    public static final String PARAMS_NAME = "keys";
    private ScalingImageAdapter imageAdapter;
    private static final int THUMBNAIL_SCALE_FACTOR = 5;
    private Button cameraButton;
    private GridView imageGrid;
    private ImagePreviewDialog imageReview;
    private Intent imageCaptureIntent;

    @Override
    public ElementType getType() {
        return ElementType.PICTURE;
    }

    /**
     * Do not call this method! It's called /if/ PictureElement becomes activated for display.
     */
    @Override
    protected View createView(Context c) {
        imageGrid = new GridView(c);
        
        String procedureId = getProcedure().getInstanceUri().getPathSegments().get(1);
        String whereStr = ImageSQLFormat.SAVED_PROCEDURE_ID + " = ? AND "
        + ImageSQLFormat.ELEMENT_ID + " = ? AND "
        + ImageSQLFormat.FILE_VALID + " = ?";
        
    Cursor cursor = c.getContentResolver().query(
        MocaDB.ImageSQLFormat.CONTENT_URI,
        new String[] { ImageSQLFormat._ID }, whereStr,
        new String[] { procedureId, id, "1" }, null);

    // HAXMODE -- if we don't do this we leak the Cursor 
    if (c instanceof Activity) {
      ((Activity)c).startManagingCursor(cursor);
    }
    
    
        imageAdapter = new ScalingImageAdapter(c, cursor, THUMBNAIL_SCALE_FACTOR);
        imageGrid.setAdapter(imageAdapter);     
        imageGrid.setNumColumns(3);
        imageGrid.setVerticalSpacing(5);
        imageGrid.setPadding(5, 0, 0, 0);
        
        imageGrid.setOnItemClickListener(this);
        imageGrid.setOnItemLongClickListener(this);
        
        //imageGrid.setTranscriptMode(imageGrid.TRANSCRIPT_MODE_ALWAYS_SCROLL);
        
        cameraButton = new Button(c);
        cameraButton.setText("Add Picture");
        cameraButton.setOnClickListener(this);
        
        imageReview = new ImagePreviewDialog(c);
        LinearLayout picContainer = new LinearLayout(c);
        picContainer.setOrientation(LinearLayout.VERTICAL);

        if(question == null) {
            question = "Attach a picture:";
        }
        
        //Set question
        TextView tv = new TextView(c);
        tv.setText(question);
        tv.setGravity(Gravity.CENTER);
        tv.setTextAppearance(c, android.R.style.TextAppearance_Medium);
        
        //Add to layout
        picContainer.addView(tv, new LinearLayout.LayoutParams(-1,-1,0.1f));
        //picContainer.addView(imageView, new LinearLayout.LayoutParams(-1,-1,0.1f));
        
        //Add button
        picContainer.addView(cameraButton, new LinearLayout.LayoutParams(-1,-1,0.1f));
        picContainer.addView(imageGrid, new LinearLayout.LayoutParams(-1, 210)); //LayoutParams(-1,-1,0.8f));
        picContainer.setWeightSum(1.0f);
        
        return picContainer;
    }
    
    // Sends an intent to ProcedureRunner with the image 
    // parameters. The native camera app is then called from 
    // ProcedureRunner.
   public void onClick(View v) {
     if (v == cameraButton) {
       String procedureId = getProcedure().getInstanceUri().getPathSegments().get(1); //which procedure its part of
       String[] params = {procedureId, id};
    
       imageCaptureIntent = new Intent(getContext(), ProcedureRunner.class);
       imageCaptureIntent.putExtra(PARAMS_NAME, params)
               .addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP)
                    .putExtra("intentKey", 0);
       ((Activity) getContext()).startActivity(imageCaptureIntent);
     }
   }
   
   
  public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
    Log.i(TAG, "onItemClick pos:" + position + " id:" + id);
    imageAdapter.toggleSelection(id);
    //v.postInvalidate();
    v.invalidate();
    //SelectableImageView view = (SelectableImageView) v;
    //view.toggleMultiSelected();
    //view.invalidate();
    //iadapter.notifyDataSetChanged();
    //parent.invalidate();
    
  }

  /* (non-Javadoc)
   * @see android.widget.AdapterView.OnItemLongClickListener#onItemLongClick(android.widget.AdapterView, android.view.View, int, long)
   */
  /**
   * If a thumbnail is clicked, open up an image preview dialog.
   */
  public boolean onItemLongClick(AdapterView<?> parent, View v, int position,
      long id) {
    Log.i(TAG, "" + position);
    
    long imageId = imageAdapter.getItemId(position);
    Uri imageUri = ContentUris.withAppendedId(ImageSQLFormat.CONTENT_URI,
        imageId);
    try {
      // hack for in-emulator demo, commented out here, but use to load a
      // static image
      // imageReview.showImage(getContext().getContentResolver().openInputStream(Uri.parse("android.resource://org.moca/"
      // + R.drawable.incision2)));
      imageReview.showImage(imageUri);
      imageReview.show();
    } catch (IOException e) {
      Log.e(TAG, "Can't open the image file for uri " + imageUri);
    }
    return false;
  }
    
  public void setAnswer(String answer) {
    if(!isViewActive()) {
      this.answer = answer;
    } else {
      // TODO : Fix this so that it works! We have the id # of the picture, and we need to reset 'selected' to match this such that
      // iadapter.getItemId(selected) == the answer we have here.
      String[] ids = answer.split(",");
      for(String id : ids) {
        imageAdapter.setSelected(Long.parseLong(id), true);
      }
    }
  }
    
    public String getAnswer() {
//      old stuff from single selection
        if(!isViewActive())
            return answer;
//        Log.i(TAG, "Putting answer " + selected);
//        return iadapter.getItemId(selected) + "";
      

        ArrayList<String> answerz = new ArrayList<String>();
      /*for(Entry<Long,SelectableImageView> e : iadapter.getViewMap().entrySet()) {
        Log.i(TAG, "getAnswer -- item " + e.getKey());
        if(e.getValue().isMultiSelected()) {
          answerz.add(Long.toString(e.getKey()));
          Log.i(TAG, "getAnswer -- item selected" + e.getKey());
        }
      }*/
      
      
    for (int i = 0; i < imageAdapter.getCount(); i++) {
      Long id = imageAdapter.getItemId(i);
      Log.i(TAG, "Considering element " + id + " for selection.");
      if (imageAdapter.isSelected(id)) {
        Log.i(TAG, "Element " + id + " is selected.");
        answerz.add(Long.toString(id));
      }
    }
    
      if (answerz.size() > 0) {
        StringBuilder csv = new StringBuilder(answerz.get(0));
        for (int i=1; i<answerz.size(); i++) {
          csv.append(",");
          csv.append(answerz.get(i));
        }
        Log.i(TAG, "getAnswers is returning " + csv.toString());
        return csv.toString();
      } else {
        Log.i(TAG, "getAnswers is returning blank");
        return "";
      }
    }
    
    /**
     * Make question and response into an XML string for storing or transmission.
     */
    public void buildXML(StringBuilder sb) {
        sb.append("<Element type=\"" + getType().name() + "\" id=\"" + id);
        sb.append("\" question=\"" + question);
        sb.append("\" answer=\"" + getAnswer());
        sb.append("\" concept=\"" + getConcept());
        sb.append("\"/>\n");
    }
    
    private PictureElement(String id, String question, String answer, String concept, String figure, String audio) {
        super(id, question, answer, concept, figure, audio);
    }
    
    /**
     * Create a PictureElement from an XML procedure definition.
     */
    public static PictureElement fromXML(String id, String question, String answer, String concept, String figure, String audio, Node node) {
        return new PictureElement(id, question, answer, concept, figure, audio);
    }

  

}
Java Source Code List
