For the project that I have posted HERE I followed 2 different approaches. The first approach was to make use on Intents. So, my wrapper looked like this:
And in class CaptureActivity.java I had this:
This approach raised "public void ResultArrived(int arg0, Intent arg1)" in the wrapper but only returned the result of the last scan when I am back in the B4A project.
I therefor tried a different approach with the wrapper looking like this (where I raise an Event from within CaptureActivity.java):
And in CaptureActivity.java I did the following:
When I now return to B4A all the scan results are displayed.
So, the question is : does an Intent only return the last "changed" values in the external activity that was started? The latter approach seems to be the better of the two devils....
B4X:
public void BeginScan(final BA ba,String EventName) {
myba=ba;
eventname=EventName.toLowerCase();
//Intent izx;
izx=new Intent(BA.applicationContext, CaptureActivity.class);
ion=new IOnActivityResult() {
@Override
public void ResultArrived(int arg0, Intent arg1) {
BA.Log("RESULT ARRIVED");
String resultbarcodetype = arg1.getStringExtra("resultbarcodetype");
String resulttext = arg1.getStringExtra("resulttext");
byte[] byteArray = arg1.getByteArrayExtra("barcodeimage");
Bitmap image = BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length);
myba.raiseEvent2(null, false, eventname+"_result", true, new Object[]{resultbarcodetype,resulttext,image});
}
};
ba.startActivityForResult(ion, izx);
}And in class CaptureActivity.java I had this:
B4X:
private void handleDecodeInternally(Result rawResult, ResultHandler resultHandler, Bitmap barcode) {
//BA.Log("IN handleDecodeInternally");
Intent data=new Intent(); //added by johan schoeman
data.putExtra("resultbarcodetype", rawResult.getBarcodeFormat().toString()); //added by johan schoeman
data.putExtra("resulttext", rawResult.getText()); //added by johan schoeman
ByteArrayOutputStream stream = new ByteArrayOutputStream(); //added by johan schoeman
barcode.compress(Bitmap.CompressFormat.PNG, 100, stream); //added by johan schoeman
byte[] byteArray = stream.toByteArray(); //added by johan schoeman
data.putExtra("barcodeimage",byteArray); //added by johan schoeman
setResult(RESULT_OK, data); //added by johan schoemanThis approach raised "public void ResultArrived(int arg0, Intent arg1)" in the wrapper but only returned the result of the last scan when I am back in the B4A project.
I therefor tried a different approach with the wrapper looking like this (where I raise an Event from within CaptureActivity.java):
B4X:
@Events(values={"scan_result(barcodetype as String, barcodetext as String, barcode as Object)"})
@ActivityObject
@Permissions(values={"android.permission.CAMERA","android.permission.WRITE_EXTERNAL_STORAGE", "android.permission.INTERNET", "android.permission.READ_CONTACTS",
"com.android.browser.permission.READ_HISTORY_BOOKMARKS", "android.permission.CHANGE_WIFI_STATE", "android.permission.ACCESS_WIFI_STATE",
"android.hardware.camera","android.hardware.camera.autofocus","android.permission.VIBRATE","android.permission.FLASHLIGHT"})
public class zxingstandaloneWrapper {
@Hide
public static BA myba;
private IOnActivityResult ion;
@Hide
public static String eventname;
public static int laserColor = 0xffff0000;
public static int[] laserAlpha = {0, 64, 128, 192, 255, 192, 128, 64};
public static int maskColor = 0x880000aa;
public static int resultColor = 0x55550055;
public static int resultPointColor = 0xffffffff;
public static int BACK_CAMERA = 0;
public static int FRONT_CAMERA = 1;
Intent izx;
public void BeginScan(final BA ba,String EventName) {
myba=ba;
eventname=EventName.toLowerCase();
//Intent izx;
izx=new Intent(BA.applicationContext, CaptureActivity.class);
ion=new IOnActivityResult() {
@Override
public void ResultArrived(int arg0, Intent arg1) {
/* BA.Log("RESULT ARRIVED");
String resultbarcodetype = arg1.getStringExtra("resultbarcodetype");
String resulttext = arg1.getStringExtra("resulttext");
byte[] byteArray = arg1.getByteArrayExtra("barcodeimage");
Bitmap image = BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length);
myba.raiseEvent2(null, false, eventname+"_result", true, new Object[]{resultbarcodetype,resulttext,image}); */
}
};
ba.startActivityForResult(ion, izx);
}And in CaptureActivity.java I did the following:
B4X:
import anywheresoftware.b4a.BA;
import zxingstandalonewrapper.zxingstandaloneWrapper;
...
...
...
...
private void handleDecodeInternally(Result rawResult, ResultHandler resultHandler, Bitmap barcode) {
//BA.Log("IN handleDecodeInternally");
//Intent data=new Intent(); //added by johan schoeman
// data.putExtra("resultbarcodetype", rawResult.getBarcodeFormat().toString()); //added by johan schoeman
// data.putExtra("resulttext", rawResult.getText()); //added by johan schoeman
// ByteArrayOutputStream stream = new ByteArrayOutputStream(); //added by johan schoeman
// barcode.compress(Bitmap.CompressFormat.PNG, 100, stream); //added by johan schoeman
// byte[] byteArray = stream.toByteArray(); //added by johan schoeman
// data.putExtra("barcodeimage",byteArray); //added by johan schoeman
// setResult(RESULT_OK, data); //added by johan schoeman
if (zxingstandaloneWrapper.myba.subExists(zxingstandaloneWrapper.eventname + "_scan_result")) {
zxingstandaloneWrapper.myba.raiseEventFromDifferentThread(this, null, 0, zxingstandaloneWrapper.eventname + "_scan_result", true, new Object[]
{rawResult.getBarcodeFormat().toString(), rawResult.getText(), barcode});
}When I now return to B4A all the scan results are displayed.
So, the question is : does an Intent only return the last "changed" values in the external activity that was started? The latter approach seems to be the better of the two devils....
