Develop Reference

how to put my own image instead of mediastore.images.media.data?

How Can I put image from directory instead of load from media. I load from gallery like this
String[] filePathColumn = { MediaStore.Images.Media.DATA };. How can load from /assets or /drawable-mdpi ? This is my code. Kindly tell me how can i used this code to add image from my directory?
public class ImageGalleryDemoActivity extends Activity {
private static int RESULT_LOAD_IMAGE = 1;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button buttonLoadImage = (Button) findViewById(R.id.buttonLoadPicture);
buttonLoadImage.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
Intent i = new Intent(
Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, RESULT_LOAD_IMAGE);
}
});
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
ImageView imageView = (ImageView) findViewById(R.id.imgView);
imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
}
}

You can put the respective drawables in the android drawables folders and Android would automatically choose the required drawable based upon the device display density. You can set the drawables as
imageView = (ImageView)findViewById(R.id.imageView);
imageView.setImageDrawable(getResources().getDrawable(R.drawable.image));
You can also take help from here.

Attach imageView to email

I want to attach imageView to send through Android mail services. This is how i get image from Gallery in Activity A:
public class Activity A extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.my_gallery);
private static int RESULT_LOAD_IMAGE = 1;
Button viewcards=(Button)findViewById(R.id.viewcards);
viewcards.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, RESULT_LOAD_IMAGE);
}});
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data)
{
Uri selectedImage = data.getData();
String[] filePathColumn =
{ MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
Intent newdata = new Intent(SavedCards.this, Cardd.class);
newdata.putExtra("picture_path", picturePath);
startActivity(newdata);
}
}}
Transfer image to another class and and put imageView in Activity B:
public class Activity B extends Activity {
private ImageView cardimage;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.carddd);
String temp = getIntent().getStringExtra("picture_path");
cardimage = (ImageView) findViewById(R.id.cardimage);
cardimage.setImageBitmap(BitmapFactory.decodeFile(temp));
and in Activity B, i want to attach this image into e-mail by onClick.
txtsend=(TextView) findViewById(R.id.txtsend);
txtsend.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
}
});
As a reference, how image can attach e-mail is here, but this is to pick from gallery.
How to do this by taken image which is already set on imageView. Thank you.

In your code you setup image to ImageView from file in Activity B. And you know path to this picture file. When you send email just attach this file.
Uri uri = Uri.parse("file://" + attachmentFile);
emailIntent.putExtra(Intent.EXTRA_STREAM, uri);

You can use ImageView's getDrawable method see this http://developer.android.com/reference/android/widget/ImageView.html#getDrawable()
So something like,
Bitmap imgViewBmp = ((BitmapDrawable)cardImage.getDrawable()).getBitmap();
Should work.
PS: I would suggest you to first check the api reference docs for any class you want to use. Chances of finding what you are looking for is quite high. Next best thing would be to actually google what you want to solve, if that doesn't work then "rephrase" you words and try again. The chances that you will find your solution are doubled (if not more) with the latter!

i need to access images from gallery and then access the pixels of the image for further processing in android

this is the code i'm using currently,the code only displays the image from gallery. but i want to access the pixels of the image.i am confused exactly where the image data is stored in the code as in which variable.
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button buttonLoadImage = (Button) findViewById(R.id.buttonLoadPicture);
buttonLoadImage.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
Intent i = new Intent(
Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, RESULT_LOAD_IMAGE);
}
});
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
ImageView imageView = (ImageView) findViewById(R.id.imgView);
imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
}
}
}

Please refer this Answer on SO, here is described to get Pixels, you should use:
Bitmap bm = BitmapFactory.decodeFile(picturePath);
and then :
bm.getPixel(x,y);// will return an int that corresponds to an int in the Color class, such as Color.BLACK or Color.WHITE.
Hope this may help you

Android : Gallery

I am working on app for editing photos.
I have a button in first activity and ImageView in second activity. When I click the button it would open gallery and I would be able to select an image. The selected image needs to appear in my ImageView in second activity but it doesn't. For time being i am displaying image in first activity it self but can anyone suggest me how to display that image in next activity.
Below is my code.
public class Camera_Gallery_Option extends Activity {
private static final int CAMERA_REQUEST = 1888;
private static final int SELECT_PICTURE = 1;
private String selectedImagePath;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.camera_gallery_option);
Button galleryButton= (Button) findViewById(R.id.button1);
galleryButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(
Intent.createChooser(intent, "Select Picture"),
SELECT_PICTURE);
}
});
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
if (requestCode == SELECT_PICTURE) {
Uri selectedImageUri = data.getData();
selectedImagePath = getPath(selectedImageUri);
System.out.println("Image Path : " + selectedImagePath);
imageview.setImageURI(selectedImageUri);
}
}
}
public String getPath(Uri uri) {
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = managedQuery(uri, projection, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}

Pass the selectedImageUri to the second activity and set the uri to image view in the second activity ?
startActivity(new Intent(this, SecondActivity.class).setData(selectedImageUri));
In the SecondActivity:
protected void onCreate(Bundle savedInstanceState) {
...
imageView.setImageURI(getIntent().getData());
}

Insert an Image from the gallery on a button in Android

Im trying to do this:
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 1 && resultCode == RESULT_OK && null != data) {
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
Bitmap bmp = BitmapFactory.decodeFile(picturePath);
b[1].setCompoundDrawablesWithIntrinsicBounds(null, new BitmapDrawable(bmp), null, null);
}
But it wont set the image, no matter what. I have tried several different methods too, like using an imagebutton instead of a button and using:
imageButton.setImageBitmap(bmp)
The gallery opens fine and and the callback comes to onActivityResult(...)
but the image wont appear on the button, I have an array of buttons.

I made a rapid test. The following code works for me. If with this you still can't set the image I would check if there's a layout problem (i.e. the image is set but there's no room to show it).
activity_main.xml has just an ImageButton set to wrap_content, inside the main layout which is match_parent.
public class MainActivity extends Activity {
ImageButton imgButton;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
imgButton = (ImageButton) findViewById(R.id.imgButton);
imgButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_PICK);
intent.setType("image/*");
startActivityForResult(intent, 0);
}
});
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if(requestCode == RESULT_CANCELED) return;
ParcelFileDescriptor fd;
try {
fd = getContentResolver().openFileDescriptor(data.getData(), "r");
} catch (FileNotFoundException e) {
e.printStackTrace();
return;
}
Bitmap bmp = BitmapFactory.decodeFileDescriptor(fd.getFileDescriptor());
imgButton.setImageBitmap(bmp);
}
}