Try following code, you might need to modify some of the parameters as per your requirement :
Create MainActivity as following :
public class MainActivity extends Activity implements OnClickListener {
private final int REQUEST_IMAGE_GALLERY = 2000;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViewById(R.id.button).setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button:
pickImageFromGallery();
break;
default:
break;
}
}
private void pickImageFromGallery() {
Intent intent = new Intent(Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
intent.setType("image/*");
startActivityForResult(Intent.createChooser(intent, "Select File"),
REQUEST_IMAGE_GALLERY);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
if (resultCode != Activity.RESULT_OK) {
return;
}
if (requestCode == REQUEST_IMAGE_GALLERY) {
Uri selectedImageUri = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImageUri,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
Log.e("PATH", "" + picturePath);
Intent intent = new Intent(this, AddImage.class);
intent.putExtra("PATH", picturePath);
startActivity(intent);
}
}
}
Now create activity_main.xml as follows :
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<Button
android:id="@+id/button"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="ChooseButton" />
</LinearLayout>
Then we need to create AddImage activity as follows :
public class AddImage extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.add_image);
ImageView imageView = (ImageView) findViewById(R.id.image_view);
if (getIntent() != null) {
String path = getIntent().getStringExtra("PATH");
Log.e("PATHR", "" + path);
new BitmapWorkerTask(imageView).execute(path);
}
}
private boolean isNeedToBeScaled(String path) {
File file = new File(path);
if (file.length() > (1024 * 1024) && isExist(path)) {
Log.e("SCALEIMAGE", "SACLE");
return true;
}
return false;
}
private boolean isExist(String path) {
File file = new File(path);
return file.exists();
}
private Bitmap getScaledImage(String path) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(path, options);
int srcWidth = options.outWidth;
int srcHeight = options.outHeight;
int[] newWH = new int[2];
newWH[0] = srcWidth / 2;
newWH[1] = (newWH[0] * srcHeight) / srcWidth;
int inSampleSize = 2;
while (srcWidth / 2 >= newWH[0]) {
srcWidth /= 2;
srcHeight /= 2;
inSampleSize *= 2;
options.inJustDecodeBounds = false;
options.inDither = false;
options.inSampleSize = inSampleSize;
options.inScaled = false;
options.inPreferredConfig = Bitmap.Config.RGB_565;
}
Bitmap sampledSrcBitmap = BitmapFactory.decodeFile(path, options);
return sampledSrcBitmap;
}
class BitmapWorkerTask extends AsyncTask<String, Void, Bitmap> {
private final WeakReference<ImageView> imageViewReference;
public BitmapWorkerTask(ImageView mImageView) {
imageViewReference = new WeakReference<ImageView>(mImageView);
}
@Override
protected Bitmap doInBackground(String... params) {
Bitmap scaled = null;
if (isNeedToBeScaled(params[0])) {
Bitmap d;
d = getScaledImage(params[0]);
int nh = (int) (d.getHeight() * (512.0 / d.getWidth()));
scaled = Bitmap.createScaledBitmap(d, 512, nh, true);
} else {
scaled = BitmapFactory.decodeFile(params[0], null);
}
return scaled;
}
@Override
protected void onPostExecute(Bitmap result) {
if (imageViewReference != null && result != null) {
final ImageView imageView = imageViewReference.get();
if (imageView != null) {
imageView.setImageBitmap(result);
imageView.setVisibility(View.VISIBLE);
}
}
}
}
}
