Send variable value from one activity to another

[Marios Trypas]

I'm having the following code to take a picture using AVD and another activity that shows on screen the battery level

(remember code tags)

public class SnapShot extends Activity implements OnClickListener, Camera.PictureCallback {
	
	CameraView cameraView;
	ImageView imv;
	@Override

	public void onCreate(Bundle savedInstanceState)
	{
	super.onCreate(savedInstanceState);
	
	setContentView(R.layout.main);
	Button pictureButton = (Button) this.findViewById(R.id.Button);
	imv = (ImageView) this.findViewById(R.id.ImageView;
	cameraView = (CameraView) this.findViewById(R.id.CameraView);
	pictureButton.setOnClickListener(this);
	}
	public void onClick(View v)
	{
	     cameraView.takePicture(null, null, this);
	}
	    public void onPictureTaken(byte[] data, Camera camera)
	{
	Bitmap bmp = BitmapFactory.decodeByteArray(data, 0, data.length);
	imv.setImageBitmap(bmp);
	String filename = "apicture.jpg";
	File pictureFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + filename);
	try
	{
	FileOutputStream pfos = new FileOutputStream(pictureFile);
	bmp.compress(CompressFormat.JPEG, 100, pfos);
	pfos.flush();
	pfos.close();
	}
	catch (FileNotFoundException e)
	{
	e.printStackTrace();
	}
	catch (IOException e)
	{
	e.printStackTrace();
	}
	}
	}

public class AndroidBattery extends Activity {
private TextView batteryLevel;

 @Override
 public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.main);
       batteryLevel = (TextView)findViewById(R.id.batterylevel);
     this.registerReceiver(this.myBatteryReceiver,
       new IntentFilter(Intent.ACTION_BATTERY_CHANGED));
 }
 private BroadcastReceiver myBatteryReceiver = new BroadcastReceiver(){
 @Override
 public void onReceive(Context arg0, Intent arg1) {
  int bLevel = arg1.getIntExtra("level", 0);
  batteryLevel.setText("Battery Level: "
    + String.valueOf(bLevel) + " %");
 } 
 };
}

What I need is a suggestion about how can i control variable bLevel in "Snapshot". I want to change the code to control the compression. To make it clear I want something like that

public void onPictureTaken(byte[] data, Camera camera)
	{
	Bitmap bmp = BitmapFactory.decodeByteArray(data, 0, data.length);
	imv.setImageBitmap(bmp);
	String filename = "apicture.jpg";
	File pictureFile = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/" + filename);
	try
	{
		[b]if (batteryLevel1>30){[/b]
	FileOutputStream pfos = new FileOutputStream(pictureFile);
	bmp.compress(CompressFormat.JPEG, [b]100[/b], pfos);
	pfos.flush();
	pfos.close();
	}
	[b]else[/b]
	{FileOutputStream pfos = new FileOutputStream(pictureFile);
	bmp.compress(CompressFormat.JPEG, [b]70[/b], pfos);
	pfos.flush();
	pfos.close();
	}}

Thanks in advance

[David Freitag]

Well, the only way i know of how to pass information between activities is using a Bundle.
But that involves directly starting an Intent, and im not sure thats what you are looking for but here 'goes.

public final int SECONDARY_ACTIVITY_REQUEST_CODE = 0;
String InfoToBeSent1 = "Hello";
String InfoToBeSent2 = "World";

Intent i = new Intent(getApplicationContext(), TargetActivity.class);
    	i.putExtra("Info1", InfoToBeSent1);
    	i.putExtra("Info2", InfoToBeSent2);
    	startActivityForResult(i, SECONDARY_ACTIVITY_REQUEST_CODE);

to pass information into the Activity in question, you use Intent.putExtra();

Intent.putExtra(String PrefixTitle, DataToBePassed);

You will use that PrefixTitle in the TargetActivity to look for the correct information, there are several different data types that can be passed not just Strings as in this example.

//if the activity is being resumed...
String mIntentInfo1 = savedInstanceState != null ? savedInstanceState.getString("Info1"):null;
String mIntentInfo2 = savedInstanceState != null ? savedInstanceState.getString("Info2"):null;
    	
//check to see if there is a bundle
if(mIntentInfo1 == null) {
    //get the Bundle out of the Intent...
    Bundle extras = getIntent().getExtras();
    //check to see if "Info1" is in the bundle, if so then assign it's value
    // to mIntentInfo1  if not, assign "nothing passed in" to mIntentInfo1...
    mIntentInfo1 = extras != null ? extras.getString("Info1") : "nothing passed in";
}
//check to see if there is a bundle
if(mIntentInfo2 == null){
    //get the Bundle out of the Intent...
    Bundle extras = getIntent().getExtras();
    //check to see if "Info2" is in the bundle, if so then assign it's value
    // to mIntentInfo2  if not, assign "nothing passed in" to mIntentInfo2...
    mIntentInfo2 = extras != null ? extras.getString("Info2") : "nothing passed in";
}

Hope that helps..