android gridview with fling + flipper

[sripadraj kudur]

Hello there,
i need to display a set of local images stored in drawable/assets into a grid view and should display in an imageview and should have fling/flipper property to change to next image.
I already have the code for doing this, but the images are read from sd card. But i need them to be displayed from local files in the project. i am able to display the local images in grid view but do not know how to pass and read the indexes to be handled by fling/flipper code. I'll put my code that handles flipping/fling to change to next image. This reads the images from sdcard but i need them to read from local project

public class ImageViewFlipper extends TouchActivity {
	
	private static final int EXIT = 0;
	private static final int SWIPE_MIN_DISTANCE = 120;
	private static final int SWIPE_MAX_OFF_PATH = 250;
	private static final int SWIPE_THRESHOLD_VELOCITY = 200;
	private static final String DIRECTORY = "/sdcard/Pictures/";
	private static final String DATA_DIRECTORY = "/sdcard/Pictures/.ImageViewFlipper/";
	private static final String DATA_FILE = "/sdcard/Pictures/.ImageViewFlipper/imagelist.dat";
	private GestureDetector gestureDetector;
	View.OnTouchListener gestureListener;
	private Animation slideLeftIn;
	private Animation slideLeftOut;
	private Animation slideRightIn;
	private Animation slideRightOut;
	private ViewFlipper viewFlipper;
	private int currentView = 0;
	List<String> ImageList;
	private int currentIndex = 0;
	private int maxIndex = 0;
	private ImageView currentImageView = null;
	
	private float mMinZoomScale=1;

	FileOutputStream output = null;
	OutputStreamWriter writer = null;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		
		
		getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
				WindowManager.LayoutParams.FLAG_FULLSCREEN);
		
		setContentView(R.layout.gridmain);
		ImageView iv = (ImageView) findViewById(R.id.zero);
		/*iv.setOnTouchListener(this);
		findViewById(R.id.one).setOnTouchListener(this);
		findViewById(R.id.two).setOnTouchListener(this);*/
		 
        ImageButton back  = (ImageButton)findViewById(R.id.back);
		back.setOnClickListener(new View.OnClickListener() {
//			@Override
			public void onClick(View arg0) {
						
				finish();
			}
		});	
		
		File data_directory = new File(DATA_DIRECTORY);
		if (!data_directory.exists()) {
			if (data_directory.mkdir()) {
				FileUtils savedata = new FileUtils();
				Toast toast = Toast.makeText(ImageViewFlipper.this,
						"Please wait while we search your SD Card for images...", Toast.LENGTH_SHORT);
				toast.show();
				SystemClock.sleep(100);
				ImageList = FindFiles();
				savedata.saveArray(DATA_FILE, ImageList);
				
			} else {
				ImageList = FindFiles();
			}

		}
		else {
			File data_file= new File(DATA_FILE);
			if (!data_file.exists()) {
				FileUtils savedata = new FileUtils();
				Toast toast = Toast.makeText(ImageViewFlipper.this,
						"Please wait while we search your SD Card for images...", Toast.LENGTH_SHORT);
				toast.show();
				SystemClock.sleep(100);
				ImageList = FindFiles();
				savedata.saveArray(DATA_FILE, ImageList);
			} else {
				FileUtils readdata = new FileUtils();
				ImageList = readdata.loadArray(DATA_FILE);
			}
		}
		
		if (ImageList == null) {
			quit();
		}
		
		SharedPreferences indexPrefs = getSharedPreferences("currentIndex",
				MODE_PRIVATE);
		if (indexPrefs.contains("currentIndex")) {
			currentIndex = indexPrefs.getInt("currentIndex", 0);
		}
		
		maxIndex = ImageList.size() - 1;
		
		Log.v("currentIndex", "Index: "+currentIndex);

		viewFlipper = (ViewFlipper) findViewById(R.id.flipper);

		slideLeftIn = AnimationUtils.loadAnimation(this, R.anim.slide_left_in);
		slideLeftOut = AnimationUtils
				.loadAnimation(this, R.anim.slide_left_out);
		slideRightIn = AnimationUtils
				.loadAnimation(this, R.anim.slide_right_in);
		slideRightOut = AnimationUtils.loadAnimation(this,
				R.anim.slide_right_out);

		viewFlipper.setInAnimation(AnimationUtils.loadAnimation(this,
				android.R.anim.fade_in));
		viewFlipper.setOutAnimation(AnimationUtils.loadAnimation(this,
				android.R.anim.fade_out));
		Drawable d = Drawable.createFromPath(ImageList
				.get(currentIndex));
		iv.setImageDrawable(d);
		resetImage(iv,d);
		System.gc();
		
		gestureDetector = new GestureDetector(new MyGestureDetector());
		gestureListener = new View.OnTouchListener() {
			public boolean onTouch(View v, MotionEvent event) {
				if (gestureDetector.onTouchEvent(event)) {
					return true;
				}
				return false;
			}
		};
	}
	
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		super.onCreateOptionsMenu(menu);
		
		int NONE = Menu.NONE;
		menu.add(NONE, EXIT, NONE, "Exit");
		return true;
	}
	
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
		case EXIT:
			quit();
			break;
		}

		return super.onOptionsItemSelected(item);
	}
	
	protected void onPause() {
		super.onPause();

		SharedPreferences indexPrefs = getSharedPreferences("currentIndex",
				MODE_PRIVATE);
		
		SharedPreferences.Editor indexEditor = indexPrefs.edit();
		indexEditor.putInt("currentIndex", currentIndex);
		indexEditor.commit();
	}
	
	protected void onResume() {
		super.onResume();
		SharedPreferences indexPrefs = getSharedPreferences("currentIndex",
				MODE_PRIVATE);
		if (indexPrefs.contains("currentIndex")) {
			currentIndex = indexPrefs.getInt("currentIndex", 0);
		}	
	}

	private List<String> FindFiles() {
		final List<String> tFileList = new ArrayList<String>();
		Resources resources = getResources();
		// array of valid image file extensions
		String[] imageTypes = resources.getStringArray(R.array.image);
		FilenameFilter[] filter = new FilenameFilter[imageTypes.length];

		int i = 0;
		for (final String type : imageTypes) {
			filter[i] = new FilenameFilter() {
				public boolean accept(File dir, String name) {
					return name.endsWith("." + type);
				}
			};
			i++;
		}

		FileUtils fileUtils = new FileUtils();
		File[] allMatchingFiles = fileUtils.listFilesAsArray(
				new File(DIRECTORY), filter, -1);
		for (File f : allMatchingFiles) {
			tFileList.add(f.getAbsolutePath());
		}
		return tFileList;
	}

	

	class MyGestureDetector extends SimpleOnGestureListener {
		private int toggleCount = 0; 
		@Override
		public boolean onDoubleTap(final MotionEvent e){
			
			
	    	ImageView view = (ImageView)findViewById(R.id.zero);
			switch(currentView){
			case 0: view = (ImageView)findViewById(R.id.zero); break;
			case 1: view = (ImageView)findViewById(R.id.one); break;
			case 2: view = (ImageView)findViewById(R.id.two); break;				
			}
			 
			resetImage(view,view.getDrawable());
			return true;
		}
		
		@Override
		public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX,
				float velocityY) {
			try {
				if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH)
					return false;
				// right to left swipe
				if (e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE
						&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
					viewFlipper.setInAnimation(slideLeftIn);
					viewFlipper.setOutAnimation(slideLeftOut);

					if (currentIndex == maxIndex) {
						currentIndex = 0;
					} else {
						currentIndex = currentIndex + 1;
					}
					ImageView iv;
					Drawable d = Drawable.createFromPath(ImageList
							.get(currentIndex));
					
					if (currentView == 0) {
						currentView = 1;
						 iv = (ImageView) findViewById(R.id.one);

						iv.setImageDrawable(d);
						
						
						System.gc();
					} else if (currentView == 1) {
						currentView = 2;
						 iv = (ImageView) findViewById(R.id.two);
						 
						iv.setImageDrawable(d);
						System.gc();
					} else {
						currentView = 0;
						 iv = (ImageView) findViewById(R.id.zero);

						iv.setImageDrawable(d);
						System.gc();
					}
					resetImage(iv,d);
					Log.v("ImageViewFlipper", "Current View: " + currentView);
					viewFlipper.showNext();
				
					return true;
				} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE
						&& Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
					viewFlipper.setInAnimation(slideRightIn);
					viewFlipper.setOutAnimation(slideRightOut);
					
					
					
					if (currentIndex == 0) {
						currentIndex = maxIndex;
					} else {
						currentIndex = currentIndex - 1;
					}
					ImageView iv;
					Drawable d = Drawable.createFromPath(ImageList
							.get(currentIndex));
					if (currentView == 0) {
						currentView = 2;
						iv = (ImageView) findViewById(R.id.two);
						iv.setImageDrawable(d);
						System.gc();
					} else if (currentView == 2) {
						currentView = 1;
						iv = (ImageView) findViewById(R.id.one);
						iv.setImageDrawable(d);
						System.gc();
					} else {
						currentView = 0;
						iv = (ImageView) findViewById(R.id.zero);
						iv.setImageDrawable(d);
						System.gc();
					}
					resetImage(iv,d);
					Log.v("ImageViewFlipper", "Current View: " + currentView);
					viewFlipper.showPrevious();
					return true;
				}
			} catch (Exception e) {
				// nothing
			}
			return false;
		}
		
	}
	@Override
	public void resetImage(ImageView iv, Drawable draw) {
		Display display = ((WindowManager) getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
		int rotation = display.getRotation();
		
		int orientation = 0;
		if( rotation == Surface.ROTATION_0 || rotation == Surface.ROTATION_180)
			orientation = 0;
		else
			orientation = 1;
		
        matrix = new Matrix();
        matrix.setTranslate(1f, 1f);
        float scale = 1;
        
        mMinZoomScale = 1;
        if( orientation==0 
        		//&& (float)draw.getIntrinsicWidth() >  (float)getWindowManager().getDefaultDisplay().getWidth()
        		) {
        	
        	scale = (float)getWindowManager().getDefaultDisplay().getWidth()/(float)draw.getIntrinsicWidth();  
        	mMinZoomScale = scale;
        	matrix.postScale(scale,scale);
        
        	iv.setImageMatrix(matrix);
        }else if( orientation==1 
        		//&& (float)draw.getIntrinsicHeight() >  (float)getWindowManager().getDefaultDisplay().getHeight()
        		){
        	scale = (float)getWindowManager().getDefaultDisplay().getHeight()/(float)draw.getIntrinsicHeight();  
        	mMinZoomScale = scale;
        	matrix.postScale(scale,scale);
        
        	iv.setImageMatrix(matrix);
        }
        	
        	
        float transX = (float) getWindowManager().getDefaultDisplay().getWidth()/2
                                - (float)(draw.getIntrinsicWidth()*scale)/2
                                ;
        	
        float transY = (float) 
        		getWindowManager().getDefaultDisplay().getHeight()/2
                                    - (float)(draw.getIntrinsicHeight()*scale)/2
                                    
                                    ;
        matrix.postTranslate(transX,transY);
        iv.setImageMatrix(matrix);
	}
	
	
	@Override
	public float getMinZoomScale(){
		return mMinZoomScale;
	}
	
	@Override
	public boolean onTouchEvent(MotionEvent rawEvent) {
		if(gestureDetector.onTouchEvent(rawEvent))
			return true;
			
		
		ImageView view = (ImageView)findViewById(R.id.zero);
		switch(currentView){
		case 0: view = (ImageView)findViewById(R.id.zero); break;
		case 1: view = (ImageView)findViewById(R.id.one); break;
		case 2:view = (ImageView)findViewById(R.id.two); break;				
		}	
		onTouchEvented(view, rawEvent);
		
		return true;
	}
	
 
	public void quit() {
		SharedPreferences indexPrefs = getSharedPreferences("currentIndex",
				MODE_PRIVATE);
		
		SharedPreferences.Editor indexEditor = indexPrefs.edit();
		indexEditor.putInt("currentIndex", 0);
		indexEditor.commit();
		
		File settings = new File(DATA_FILE);
		settings.delete();
		finish();
		int pid = android.os.Process.myPid();
		android.os.Process.killProcess(pid);
		System.exit(0);
	}


}