Clash Royale CLAN TAG#URR8PPP

New Value EditText not being displayed , no errors whatsoever

EDIT : By the way , if i hard code edt4.setText("any text") IN THE SCOPE , it shows the value

EDIT2: tried rebuilding/cleaning project , could this be a bug in settext method, it looks like im doing it right . When i look at other code with settext

EDIT3: startactivityforresult might be my answer ? , i openend another question related to what i wanna try out , i still havent found another solution , stuck with this for a week now : (
this is the link to my question Can i use startActivityForResult , with one activity?

EDIT4 : now trying it with making views visible and invisible

I have read every single article about anything related on stackoverflow , dreamincode etc, and i cant find anybody that knows the answer for my problem.

I have a qr scanner and after a successful scan the result needs to be put in a EDIT TEXT field with name editText4 , my code throws no errors but it is NOT displaying any value .

I've posted on different forums but to no avail (https://www.dreamincode.net/forums/topic/412000-settext-is-not-showing-set-value-in-edittext-in-gui/page__st__15__gopid__2372214&#entry2372214)
, as you can see the commented code . That's pretty much also what I've tried , I think I somehow got to get my handle result method inside of the scope.

NOTE : Log.v outputs the result very well , but when i try anything else with the result it just don't works or being displayed

ps: I m beginner at java

Thanks for your help

here's my mainactivity

` public class MainActivity extends Activity implements
ZXingScannerView.ResultHandler {

Button sendButton;
EditText edt4;
EditText edt2;
private ZXingScannerView mScannerView;




@Override
protected void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);


edt4 = findViewById(R.id.editText4);

mScannerView = findViewById(xmlScannerView);
mScannerView.setFormats(ZXingScannerView.ALL_FORMATS);
mScannerView.setResultHandler(this);
mScannerView.startCamera();







EditText delete2;
Button button3;

button3 = findViewById(R.id.button3);
delete2 = findViewById(R.id.editText2);

final EditText finalEdittext = delete2;
button3.setOnClickListener(new View.OnClickListener()

@Override
public void onClick(View v)
//Clear EditText
finalEdittext.getText().clear();


);

EditText delete4;
Button button4;

delete4 = findViewById(editText4);
button4 = findViewById(R.id.button4);

final EditText finalEdittext1 = delete4;
button4.setOnClickListener(new View.OnClickListener()

@Override
public void onClick(View v)
//Clear EditText
finalEdittext1.getText().clear();


);





@Override
public void onPause()
super.onPause();
mScannerView.stopCamera(); // Stop camera on pause



public void onClick(View v)

RelativeLayout someid = findViewById(R.id.someId);
mScannerView.setVisibility(View.VISIBLE);
someid.setVisibility(View.INVISIBLE);



// EditText edt4;

@Override
public void handleResult(final Result result)
//handle result

Log.v("handleResult", result.getText());


edt4 = findViewById(editText4);
edt4.setText(result.getText());
//edt4.setText(String.valueOf(result.getText()));

// edt4.setText(new

StringBuilder().append("Resultaat:").append(result.getText()).toString());





`


this is xml :

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:background="@mipmap/ic_launcher_foreground">


android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true">

<me.dm7.barcodescanner.zxing.ZXingScannerView

android:id="@+id/xmlScannerView"
android:visibility="gone"
android:layout_height="match_parent"
android:layout_width="match_parent" />
<RelativeLayout

android:id="@+id/someId"
android:layout_width="match_parent"
android:layout_height="match_parent">

<EditText
android:id="@+id/editText4"
android:layout_width="match_parent"
android:layout_height="62dp"
android:layout_marginTop="67dp"
android:ems="10"
android:hint="@string/scan_locatie"
android:inputType="text"

android:text=""
tools:backgroundTint="@android:color/holo_red_light" />


<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/editText4"
android:layout_centerHorizontal="true"
android:background="@android:color/holo_red_light"
android:onClick="onClick"
android:text="@string/scan_qr"
tools:text="scan qr code" />

<EditText
android:id="@+id/editText2"
android:layout_width="match_parent"
android:layout_height="61dp"
android:layout_alignParentStart="true"
android:layout_alignParentTop="true"
android:layout_marginTop="197dp"
android:ems="10"
android:hint="@string/scan_order"

android:inputType=""
android:visibility="visible"
tools:backgroundTint="@android:color/holo_red_light" />

<Button
android:id="@+id/button2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/editText2"
android:layout_centerHorizontal="true"
android:background="@android:color/holo_red_light"
android:onClick="onClick"
android:text="@string/scan_qr"
tools:text="scan qr code" />

<Button
android:id="@+id/sendButton"
android:layout_width="157dp"
android:layout_height="32dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="72dp"
android:background="@android:color/holo_red_light"
android:text="@string/button"
tools:text="Versturen.." />


<Button
android:id="@+id/button3"
android:layout_width="40dp"
android:layout_height="38dp"
android:layout_alignBaseline="@+id/editText2"
android:layout_alignParentEnd="true"
android:background="@android:drawable/ic_delete" />

<Button
android:id="@+id/button4"
android:layout_width="39dp"
android:layout_height="37dp"
android:layout_alignBaseline="@+id/editText4"
android:layout_alignParentEnd="true"
android:background="@android:drawable/ic_delete" />

</RelativeLayout>


EDIT:5 also changed XML , and main , still not working :(

result.getText()

EditText edt4;

handleResult()

onCreate()

editText4

edt4

3 Answers
3

I think result.getText() is a String anyway, so you could change the following line:

result.getText()

String

edt4.setText(String.valueOf(result.getText()));


To:

edt4.setText(result.getText());


After that you call updateScannerData, which is also writing to the EditText once again, but from the UI-Thread. I would recommend to remove the UI-Thread code as well since I assume the code runs on that Thread anyway.

updateScannerData

EditText

UI-Thread

UI-Thread

Thread

updateScannerData

result.getText()

try removing recreate();

recreate();

you are recreating the activity after setting the value, so the previous value is lost

You can either use

edt4.clear();


or

edt4.setText("");


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