Hi,
Iam currently working on picture viewer.Don't copy and paste this code just try to understand what is done and try to build from this code.






public class ImageViewer extends Activity {


ImageView iv;
ScrollView sv;
HorizontalScrollView hv;
LinearLayout lv;
RelativeLayout rl;

float zoom = 1.0f;
int angle=0;
public static Drawable img;

public static Bitmap resizedBitmap;
public static String f;
// private ArrayList<String> ImageList = new ArrayList<String>();


ImageButton bt1;
ImageButton bt2;
ImageButton bt3;
ImageButton bt4;


float scale=1.0f;

Matrix matrix = new Matrix();
Matrix savedMatrix = new Matrix();
int w;
int h;
int po;
String intent;
public String imagepath;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.image_view);
// iv=(ImageView)findViewById(R.id.iv);
sv=(ScrollView)findViewById(R.id.scroll);
sv.layout(10,10,101,10);
//hv=(HorizontalScrollView)findViewById(R.id.hv);
rl=(RelativeLayout)findViewById(R.id.rl);

iv=new ImageView(ImageViewer.this);
iv.setVerticalScrollBarEnabled(true);
iv.setClickable(true);
rl.setGravity(Gravity.CENTER);


Intent i=getIntent();
po= i.getIntExtra("POSITION", 0);
intent=i.getStringExtra("FILE_PATH");
// ImageList =i.getStringArrayListExtra("ImageList");
System.out.println("The intent is"+intent);
bt1=(ImageButton)findViewById(R.id.image1);
bt2=(ImageButton)findViewById(R.id.image2);
bt3=(ImageButton)findViewById(R.id.image3);
bt4=(ImageButton)findViewById(R.id.image4);
Bitmap bitmapOrg = BitmapFactory.decodeFile(Gallary.path);

Matrix matrix = new Matrix();
matrix.postScale(scale,scale);
resizedBitmap = Bitmap.createBitmap(bitmapOrg, 0, 0,
bitmapOrg.getWidth(), bitmapOrg.getHeight(), matrix, true);
//BitmapDrawable bmd=new BitmapDrawable(bitmapOrg);
// iv.setImageDrawable(bmd);
iv.setImageBitmap(resizedBitmap );

iv.setScaleType(ScaleType.CENTER);


sv.addView(iv);
sv.setVerticalScrollBarEnabled(true);




bt1.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
zoomIn();
}
});

bt2.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
zoomOut();
}
});
bt3.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
rotateLeft();
}
});
bt4.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
rotateRight();
}
});



}

public void zoomIn()
{
//Bitmap bitmapOrg = BitmapFactory.decodeFile(f);
//int width = bitmapOrg.getWidth();
//int height = bitmapOrg.getHeight();
int width = ImageViewer.resizedBitmap.getWidth();
int height = ImageViewer.resizedBitmap.getHeight();
zoom=zoom+0.1f;

float scaleWidth = zoom;
float scaleHeight = zoom;
try{
Matrix matrix = new Matrix();
matrix.postScale(scaleWidth, scaleHeight);
matrix.postRotate(angle);
// Bitmap resizedBitmap = Bitmap.createBitmap(bitmapOrg,0,0, width, height, matrix, true);
Bitmap resizedBitmap = Bitmap.createBitmap(ImageViewer.resizedBitmap,0,0, width, height, matrix, true);
BitmapDrawable bmd = new BitmapDrawable(resizedBitmap);
iv.setScaleType(ScaleType.FIT_CENTER);
// iv.layout(0, 0, 0, 0);
iv.setImageDrawable(bmd);

}
catch(final java.lang.OutOfMemoryError e)
{
System.gc();
}

}
public void zoomOut()
{
//Bitmap bitmapOrg = BitmapFactory.decodeFile(f);
//int width = bitmapOrg.getWidth();
// int height = bitmapOrg.getHeight();
zoom=zoom-0.1f;
if(zoom<=0.1f)
{
zoom=zoom+0.1f;
}

float scaleWidth = zoom;
float scaleHeight = zoom;
try{
Matrix matrix = new Matrix();
matrix.postScale(scaleWidth, scaleHeight);
matrix.postRotate(angle);

// Bitmap resizedBitmap = Bitmap.createBitmap(bitmapOrg,0,0, width, height, matrix, true);
Bitmap resizedBitmap = Bitmap.createBitmap(ImageViewer.resizedBitmap,0,0, width, height, matrix, true);
BitmapDrawable bmd = new BitmapDrawable(resizedBitmap);
iv.setImageDrawable(bmd);
iv.setBackgroundColor(Color.WHITE);

iv.setScaleType(ScaleType.FIT_CENTER);

iv.setVerticalScrollBarEnabled(true);
iv.setHorizontalScrollBarEnabled(true);
}
catch(final java.lang.OutOfMemoryError e)
{
System.gc();
}
}

public void rotateLeft()
{
int width = ImageViewer.resizedBitmap.getWidth();
int height = ImageViewer.resizedBitmap.getHeight();
angle=angle+270;
float scaleWidth =zoom;
float scaleHeight = zoom;

Matrix matrix = new Matrix();
matrix.postScale(scaleWidth, scaleHeight);
matrix.postRotate(angle);
// Bitmap resizedBitmap = Bitmap.createBitmap(bitmapOrg, 0, 0,
// width, height, matrix, true);
Bitmap resizedBitmap= Bitmap.createBitmap(ImageViewer.resizedBitmap, 0, 0,
width, height, matrix, true);
BitmapDrawable bmd = new BitmapDrawable(resizedBitmap);

iv.setImageDrawable(bmd);
// iv.layout(0,0,0,0);
iv.setBackgroundColor(Color.WHITE);
iv.setScaleType(ScaleType.CENTER);

}
public void rotateRight()
{
int width = ImageViewer.resizedBitmap.getWidth();
int height = ImageViewer.resizedBitmap.getHeight();
angle=angle+90;
float scaleWidth = zoom;
float scaleHeight = zoom;

Matrix matrix = new Matrix();
matrix.postScale(scaleWidth, scaleHeight);
matrix.postRotate(angle);
Bitmap resizedBitmap= Bitmap.createBitmap(ImageViewer.resizedBitmap, 0, 0,
width, height, matrix, true);
BitmapDrawable bmd = new BitmapDrawable(resizedBitmap);
iv.setImageDrawable(bmd);
iv.setBackgroundColor(Color.WHITE);
iv.setScaleType(ScaleType.CENTER);

}

}





[font=Arial Black] [/font] my applications functionalities are working fine...but with a small problem.....the image view is displaying contents in the top left corner of the window.....I added android:layout_gravity="center" to display the image view in the middle. but when the picture is zoomed the bottom and left sides are clippped....if any body give me some suggestions? [font=Arial] [/font]

Hi ,
I solved the issue , try to place the buttons inside a linear layout and adjust layout gravity that will work.
So anybody who wanted to develop a pictureviewer take this ass a sample code.


Thanks in advance,
Beneesh

hi,

if anybody need help in creating a picture viewer approach me.
Thanks in advance,
Beneesh

I am new in Android.
So, If I want to put Thumbnails in any imageViewer, then how can I do that?

Can u be little more specific......on the task u have to do..

I would like to develop this kind of image viewer in that the Images can be view as like a Thumbnails.
and also it has the ability to view professional RAW formats i.e. RAW image and also ability to backup all/some images to main memory.

Hello,

Whats the Gallary.path?
What will happen with this code?

Can anyone explain?

By passing a images to gallery we can display images thumnail format. also images are scrollable. Wecan select particular image for viewing this.

But what is Gallary??
Is it a folder's name in which images are stored on Eclipse?

can you give me the exact code and how will it perform because I am stuck at here.

k

This is for calling gallery class


filePath=FindImages.ImagePath.get(0).toString();
intent = new Intent(GalleryTraverse.this,Gallary.class);
intent.putExtra("FILE_PATH","GalleryTraverse" );
startActivity(intent);
finish();

ok so we have to create one class which has a name gallery.
is it right??

and in that class have to wirte this code.
Is it true?

yes......I think this code is available...just search in google that's better....

Hey buddy,

This code is not working. It gives me an error.