[TIMOB-1510] Android: Add support for saveToPhotoGallery (Titanium.Media.saveToPhotoGallery)

   var win1 = Titanium.UI.createWindow({
       backgroundColor : '#fff',
       exitOnClose:true
   });
     
   var saveToGallery = false;
    
   var hasCamera = Ti.Media.isCameraSupported;
    
   if(hasCamera) {
       var hasBackfacingCamera = hasCamera;
       var hasFrontfacingCamera = hasCamera;
       var front = false;
       var availableCameras = Ti.Media.availableCameras;
        
       hasBackfacingCamera = (availableCameras.indexOf(Ti.Media.CAMERA_REAR) >= 0);
       hasFrontfacingCamera = (availableCameras.indexOf(Ti.Media.CAMERA_FRONT) >= 0);
    
       var b1 = Ti.UI.createButton({
           title:'Save To Gallery',
           left:0,
           top:0,
           color:'red',
           width:'50%',
           height:'10%',
           backgroundColor:'black',
       }) ;
        
       var b2 = Ti.UI.createButton({
           title:'View Gallery',
           right:0,
           top:0,
           width:'50%',
           height:'10%',
           backgroundColor:'black',
           color:'white'
       });
        
       win1.add(b1);
       win1.add(b2);
        
       var container = Ti.UI.createView({
           top:'10%',
           height:'80%'
       });
        
       var img = Ti.UI.createImageView({
       });
        
       var saveButton = Ti.UI.createButton({
           title:'SAVE',
           backgroundColor:'black',
           color:'white',
           visible:false
       });
        
       container.add(img);
       container.add(saveButton);
       win1.add(container);
        
        
       var b3 = Ti.UI.createButton({
           title:'Native Camera',
           top:'90%',
           height:'10%',
           left:0,
           width:'50%',
           backgroundColor:'black',
           color:'white'
       });
       win1.add(b3);
        
       var b4 = Ti.UI.createButton({
           title:'Camera Overlay',
           top:'90%',
           height:'10%',
           right:0,
           width:'50%',
           backgroundColor:'black',
           color:'white'
       });
        
       win1.add(b4);
        
       var overlayObj = Ti.UI.createView({});
       var picBtn = Ti.UI.createButton({
           title:'Snap Picture',
           top:'90%',
           height:'10%',
           left:0,
           width:'50%',
           backgroundColor:'black',
           color:'white'
       });
       overlayObj.add(picBtn);
       picBtn.addEventListener('click',function(){
           Ti.Media.takePicture();
       });
       if(hasFrontfacingCamera && hasBackfacingCamera) {
           var swapBtn = Ti.UI.createButton({
               title:'Switch Camera',
               top:'90%',
               height:'10%',
               right:0,
               width:'50%',
               backgroundColor:'black',
               color:'white'
           });
            
           overlayObj.add(swapBtn);
           swapBtn.addEventListener('click',function(){
               if(front == true) {
                   Ti.Media.switchCamera(Ti.Media.CAMERA_REAR);
               } else {
                   Ti.Media.switchCamera(Ti.Media.CAMERA_FRONT);
               }
               front = !front; 
           });
       } else {
           //Adjust Button
           picBtn.width = Ti.UI.FILL;
       }
        
        
       saveButton.addEventListener('click',function(e){
           if(img.image != undefined) {
               Ti.Media.saveToPhotoGallery(img.image,{
                   success:function(){
                       alert('Saved. Check In Gallery');
                   },
                   error:function(e){
                       var msg = 'Code: '+e.code+' Msg: '+e.error;
                       alert(msg);
                   }
               });
                
           } else {
               Ti.API.info('NO IMAGE ON img to save to photo gallery');
           }
       });
        
       b1.addEventListener('click',function(){
           saveToGallery = !saveToGallery;
           if(saveToGallery == true) {
               b1.color = 'green';
           } else {
               b1.color = 'red';
           }
       });
        
        
       b2.addEventListener('click',function(){
           Ti.Media.openPhotoGallery({});
       });
        
        
       b3.addEventListener('click',function(){
           fireUpTheCamera(saveToGallery,false, false);
       });
        
       b4.addEventListener('click',function(){
           if(hasBackfacingCamera && hasFrontfacingCamera) {
               //Alwways start with back camera
               front = false;
           } else {
               //Start with what ever camera is available
               front = hasFrontfacingCamera;
           }
           fireUpTheCamera(saveToGallery,true, front);
       });
        
       function fireUpTheCamera(save, hasoverlay, front) {
           var options = {
               success : function(e) {
                   Ti.API.info('GOT SUCCESS CALLBACK');
                   var imgWid = e.media.width;
                   var imgHeight = e.media.height;
                   var mSize = container.size;
                   var mW = mSize.width;
                   var mH = mSize.height;
                    
                   var wS = imgWid/mW;
                   var hS = imgHeight/mH;
                   var tS = (wS < hS) ? wS : hS;
                    
                   var dstWid = imgWid/tS;
                   var dstHeight = imgHeight/ tS;
                    
                   Ti.API.info(imgWid+' '+imgHeight+' '+mW+' '+mH+' '+wS+' '+hS+' '+tS+' '+dstWid+' '+dstHeight);
                   var resize = e.media.imageAsResized(dstWid,dstHeight);
                   img.image = resize;
                   saveButton.visible = true;
               },
               cancel : function() {
                   // create alert
                   var a = Titanium.UI.createAlertDialog({
                       title : 'Camera',
                       message: 'Action cancelled by user'
                   });
                   a.show();     
               },
               error : function(error) {
                   // create alert
                   var a = Titanium.UI.createAlertDialog({
                       title : 'Camera'
                   });
          
                   // set message
                   var msg = 'Unexpected error: ' + error.code;
                   if(error.error != undefined) {
                       msg = msg + ' Message: '+error.error;
                   }
                   a.setMessage(msg);
                   a.show();
               },
               saveToPhotoGallery : save,
               mediaTypes : [Ti.Media.MEDIA_TYPE_PHOTO],
               autohide: true
           };
           if(hasoverlay) {
               options.overlay = overlayObj;
           }
           if(front) {
           	options.whichCamera = Ti.Media.CAMERA_FRONT;
           }
           Titanium.Media.showCamera(options);
       }
   }else {
       var label = Ti.UI.createLabel({
           text:'NO CAMERAS ON DEVICE',
           color:'red'
       });
       win1.add(label);
   }
    
   win1.open();