I am newbie to android, i faced a problem with camera in android. In my class, i have some instance variables(holding some values which i got from Activity1 through intent) and a button and image view. when i click that button the application opens camera and stores in sd card, after that i am doing some operations with instance variables. But the problem is the variables are reinitialized to default values. i have used shared preference or storing(variables data) in another class as static variables then it works fine. My question is why all instance variables are reinitialized.
in my application Activity1--(calling)--->Activity2[this has a button and an imageview], here i am passing some data through intent from Activity1 to Activity2, In Activity2 (in Activity2 i am getting data successfully before calling camera ) if am calling camera,the data which i got from intent are reinitialized to default values.To avoid this i have not passed the data from Activity1(i have stored in SharedPreference or in constant class as static variables it works fine).My question is are these only solutions?
This is camera code in activity2
// camera code
public void openCamera() {
if (Helper.checkCameraHardware(this)) {
try {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String dateFileName = sdf.format(new Date()); // generating
// todays date
// for folder
SimpleDateFormat sdf1 = new SimpleDateFormat("yyyyMMddHHmmss");
String curentDateandTime = sdf1.format(new Date()); // generating
// todays
// date with
// min,seconds
// for image
// creating an folder in sd card : ed ==> sdCard path/IMG_Folder
// in helper class / folder with todays date
File sdImageMainDirectory = new File(Environment
.getExternalStorageDirectory().getPath()
+ "/"
+ Helper.IMG_FOLDER + "/" + dateFileName);
if (!sdImageMainDirectory.exists()) { // if folder not exists it
// created
sdImageMainDirectory.mkdirs();
}
// setting image path to sd card/Img_folder in helper
// class/todays date folder
image_PATH = Environment.getExternalStorageDirectory()
.getPath()
+ "/"
+ Helper.IMG_FOLDER
+ "/"
+ dateFileName + "/";
// creating a new file(jpg) at above image path
File file = new File(image_PATH, curentDateandTime + ".jpg");
// re-initilization of image_PATH to new file(jpg)
image_PATH = image_PATH + curentDateandTime + ".jpg";
savePreferences();
// creating an uri for file
Uri outputFileUri = Uri.fromFile(file);
Intent i = new Intent("android.media.action.IMAGE_CAPTURE");
i.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
startActivityForResult(i, 1234);
} catch (Exception e) {
Helper.AlertBox(this,
"Error No: 001\nPlease Contact Technical Person.\n"
+ e.toString());
}
} else {
Helper.AlertBox(this, "Camera Not Found.!");
}
}
private void savePreferences() {
SharedPreferences.Editor editor = getPreferences(MODE_PRIVATE).edit();
editor.putString("image_PATH", image_PATH);
// Commit the edits!
editor.commit();
}
private void restorePreferences() {
SharedPreferences settings = getPreferences(MODE_PRIVATE);
image_PATH = settings.getString("image_PATH", "");
}
public void onActivityResult(int requestCode, int resultCode, Intent data) {
// image_PATH = "";
image_str = "";
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 1234) {
if (resultCode == RESULT_OK) {
restorePreferences();
System.out.println("image_PATH :" + image_PATH);
File file = new File(image_PATH);
if (file.exists()) {
Log.e("File exist :", "File exist at " + image_PATH);
FileInputStream in;
BufferedInputStream buf;
try {
// in = new FileInputStream(image_PATH);
// buf = new BufferedInputStream(in);
// bMap = BitmapFactory.decodeStream(buf);
// iv_image.setVisibility(View.VISIBLE);
// iv_image.setImageBitmap(bMap);
// ConstantClass.image_PATH = image_PATH;
// if (in != null) {
// in.close();
// }
// if (buf != null) {
// buf.close();
// }
intent = new Intent(TakePhoto.this, PhotoPreview.class);
intent.putExtra("index", Helper.index);
Log.e("test", "0");
Helper.bitMap[Helper.index] = image_PATH;
Log.e("test", "1");
Helper.btn[Helper.index] = false;
Log.e("test", "2");
startActivity(intent);
Log.e("test", "3");
// Helper.AlertBox(this, "Image Captured.");
} catch (Exception e) {
Helper.AlertBox(this,
"Error No: 004\nPlease contact technical person.\n"
+ e.toString());
Log.e("Error reading file", e.toString());
}
} else {
Helper.AlertBox(this,
"Error No: 005\nPlease contact technical person.");
}
} else {
Toast.makeText(getApplicationContext(), "Cam Not Supported",
5000).show();
}
}
}
// camera code end
when i click on image Button,openCamera() will be called.
Thanks in advance
