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package org.devgeeks.Canvas2ImagePlugin;
import java.io.File;
import java.io.FileOutputStream;
import java.util.Calendar;
import org.apache.cordova.CallbackContext;
import org.apache.cordova.CordovaPlugin;
import org.json.JSONArray;
import org.json.JSONException;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.util.Base64;
import android.util.Log;
/**
* Canvas2ImagePlugin.java
*
* Android implementation of the Canvas2ImagePlugin for iOS.
* Inspirated by Joseph's "Save HTML5 Canvas Image to Gallery" plugin
* http://jbkflex.wordpress.com/2013/06/19/save-html5-canvas-image-to-gallery-phonegap-android-plugin/
*
* @author Vegard Løkken <vegard@headspin.no>
*/
public class Canvas2ImagePlugin extends CordovaPlugin {
public static final String ACTION = "saveImageDataToLibrary";
@Override
public boolean execute(String action, JSONArray data,
CallbackContext callbackContext) throws JSONException {
if (action.equals(ACTION)) {
String base64 = data.optString(0);
if (base64.equals("")) // isEmpty() requires API level 9
callbackContext.error("Missing base64 string");
// Create the bitmap from the base64 string
Log.d("Canvas2ImagePlugin", base64);
byte[] decodedString = Base64.decode(base64, Base64.DEFAULT);
Bitmap bmp = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
if (bmp == null) {
callbackContext.error("The image could not be decoded");
} else {
// Save the image
File imageFile = savePhoto(bmp);
if (imageFile == null)
callbackContext.error("Error while saving image");
// Update image gallery
scanPhoto(imageFile);
callbackContext.success(imageFile.toString());
}
return true;
} else {
return false;
}
}
private File savePhoto(Bitmap bmp) {
File retVal = null;
try {
Calendar c = Calendar.getInstance();
String date = "" + c.get(Calendar.DAY_OF_MONTH)
+ c.get(Calendar.MONTH)
+ c.get(Calendar.YEAR)
+ c.get(Calendar.HOUR_OF_DAY)
+ c.get(Calendar.MINUTE)
+ c.get(Calendar.SECOND);
String deviceVersion = Build.VERSION.RELEASE;
Log.i("Canvas2ImagePlugin", "Android version " + deviceVersion);
int check = deviceVersion.compareTo("2.3.3");
File folder;
/*
* File path = Environment.getExternalStoragePublicDirectory(
* Environment.DIRECTORY_PICTURES ); //this throws error in Android
* 2.2
*/
if (check >= 1) {
folder = Environment
.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
if(!folder.exists()) {
folder.mkdirs();
}
} else {
folder = Environment.getExternalStorageDirectory();
}
File imageFile = new File(folder, "c2i_" + date.toString() + ".png");
FileOutputStream out = new FileOutputStream(imageFile);
bmp.compress(Bitmap.CompressFormat.PNG, 100, out);
out.flush();
out.close();
retVal = imageFile;
} catch (Exception e) {
Log.e("Canvas2ImagePlugin", "An exception occured while saving image: "
+ e.toString());
}
return retVal;
}
/* Invoke the system's media scanner to add your photo to the Media Provider's database,
* making it available in the Android Gallery application and to other apps. */
private void scanPhoto(File imageFile)
{
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
Uri contentUri = Uri.fromFile(imageFile);
mediaScanIntent.setData(contentUri);
cordova.getActivity().sendBroadcast(mediaScanIntent);
}
}
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