Get Value of a Edit Text Field

Get Value of a Edit Text field

By using getText():

Button   mButton;
EditText mEdit;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    mButton = (Button)findViewById(R.id.button);
    mEdit   = (EditText)findViewById(R.id.edittext);

    mButton.setOnClickListener(
        new View.OnClickListener()
        {
            public void onClick(View view)
            {
                Log.v("EditText", mEdit.getText().toString());
            }
        });
}

How to continously get values from a Edit Text in android

if you want to get the data continuously from the EditText.

editText.addTextChangedListener(new TextWatcher() {
    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {}

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {
//save it to file here or what ever you want
    }

    @Override
    public void afterTextChanged(Editable s) {}
});

How do I get an EditText input into a variable

In your Activity:

@Override
protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        EditText et = (EditText) findViewById(R.id.editText);
        String text= et.getEditableText().toString();
}

Android getText from EditText field

Sample code for How to get text from EditText.

Android Java Syntax

EditText text = (EditText)findViewById(R.id.vnosEmaila);
String value = text.getText().toString();

Kotlin Syntax

val text = findViewById<View>(R.id.vnosEmaila) as EditText
val value = text.text.toString()

How do i take value from EditText with button onclick and show it in TextView

try out this:

Java file:

public class MainActivity extends AppCompatActivity {
    EditText editText;
    Button button;
    TextView textView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        editText=(EditText)findViewById(R.id.editText);
        button=(Button)findViewById(R.id.button);
        textView=(TextView) findViewById(R.id.textView);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                textView.setVisibility(View.VISIBLE);
                textView.setText(editText.getText().toString());
            }
        });

    }
}

xml file:

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text=""
    android:visibility="gone"
    android:id="@+id/textView"
    android:layout_centerVertical="true"
    android:layout_centerHorizontal="true" />

<Button
    android:text="Click here"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginBottom="62dp"
    android:id="@+id/button"
    android:layout_marginTop="50dp"
    android:layout_centerHorizontal="true" />

<EditText
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:inputType="textPersonName"
    android:text="some text"
    android:ems="10"
    android:layout_alignParentTop="true"
    android:id="@+id/editText"
    android:layout_alignParentRight="true"
    android:layout_alignParentEnd="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true" />

android-can't get value of edit text in fragment

The FirstName EditText is null because the findViewById method is trying to find an editext with the id of FirstName but the correct id is PatientFirstName

To solve the issue, replace the

final EditText FirstName=(EditText) v.findViewById(R.id.FirstName);

with

final EditText FirstName=(EditText) v.findViewById(R.id.PatientFirstName);

Get EditText input values and display some calculation result in an TextView

Base on your xml layout content:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/root"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <EditText
        android:id="@+id/id_a"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <EditText
        android:id="@+id/id_b"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <EditText
        android:id="@+id/id_c"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <Button
        android:id="@+id/id_buton_rata"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="calculateFunction" />

    <TextView
        android:id="@+id/id_result"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

Example #1 (without LiveData and ViewModel)

I create some new simple fragment (as example)

public class CalculatorWeightedFragment extends Fragment {

    private Button button;
    private EditText editTextA;
    private EditText editTextB;
    private EditText editTextC;
    private TextView textViewD;

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_calculator_w, container, false);
    }

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        button = view.findViewById(R.id.id_buton_rata);
        editTextA = view.findViewById(R.id.id_a);
        editTextB = view.findViewById(R.id.id_b);
        editTextC = view.findViewById(R.id.id_c);
        textViewD = view.findViewById(R.id.id_result);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                double result = calculateResult();
                String output = String.format("Result:  %s", result);
                textViewD.setText(output);
            }
        });
    }

    private double calculateResult() {
        try {
            int a = Integer.parseInt(editTextA.getText().toString());
            int b = Integer.parseInt(editTextB.getText().toString());
            int c = Integer.parseInt(editTextC.getText().toString());

            // Result
            return 0.25 * a + 0.25 * b + 0.5 * c;
        } catch (NumberFormatException e) {
            e.printStackTrace();
            return 0;
        }
    }
}

Example #2 (with LiveData and ViewModel)

When you are using LiveData and ViewModel, you no need button in your Fragment. You can observe all of the changes.

Activity where you are creating this fragment. To have ViewModel in Fragment, you can use dependency injection (e.g. using Dagger library) or get it from ViewModelProviders (or AndroidViewModelFactory).

Here, to make example as simple as possible, I'm passing it via constructor.

Activity

public class MainActivity extends AppCompatActivity {

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        CalculatorWeightedViewModel vm = new CalculatorWeightedViewModel();

        CalculatorWeightedFragment fragment = new CalculatorWeightedFragment(vm);

        FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
        transaction.add(R.id.frame_layout, fragment);
        transaction.commit();
    }
}

ViewModel

You can store you values (a, b, c) as fieldsfor different purpose. Here, I'm recalculating result live, without any extra fiels. To make it as simple as possible.

package com.example.stack_android;

import androidx.lifecycle.LiveData;
import androidx.lifecycle.MutableLiveData;
import androidx.lifecycle.ViewModel;

public class CalculatorWeightedViewModel extends ViewModel {

    private MutableLiveData<String> testString = new MutableLiveData<>();

    public LiveData<String> takeText() {
        return testString;
    }

    void updateValues(double a, double b, double c) {
        double result = recalculate(a, b, c);
        String value = "Result: " + result;
        testString.postValue(value);
    }

    void showError() {
        testString.postValue("Wrong Value");
    }

    private double recalculate(double a, double b, double c) {
        return 0.25 * a + 0.25 * b + 0.5 * c;
    }
}

Fragment:

Additionaly you can create separate listeners (for each of the fields). Here, I'm using one (named TextWatcher listener) for all of the fields.

public class CalculatorWeightedFragment extends Fragment {

    private CalculatorWeightedViewModel viewModel;

    private EditText editTextA;
    private EditText editTextB;
    private EditText editTextC;
    private TextView textViewD;

    public CalculatorWeightedFragment(CalculatorWeightedViewModel viewModel) {
        this.viewModel = viewModel;
    }

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_calculator_w, container, false);
    }

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        editTextA = view.findViewById(R.id.id_a);
        editTextB = view.findViewById(R.id.id_b);
        editTextC = view.findViewById(R.id.id_c);
        textViewD = view.findViewById(R.id.id_result);

        TextWatcher listener = new TextWatcher() {
            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                textChanged();
            }

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
                // Not used
            }

            @Override
            public void afterTextChanged(Editable s) {
                // Not used
            }
        };

        editTextA.addTextChangedListener(listener);
        editTextB.addTextChangedListener(listener);
        editTextC.addTextChangedListener(listener);

        viewModel.takeText().observe(getViewLifecycleOwner(), new Observer<String>() {
            @Override
            public void onChanged(String newValue) {
                textViewD.setText(newValue);
            }
        });
    }

    private void textChanged() {
        try {
            int a = Integer.parseInt(editTextA.getText().toString());
            int b = Integer.parseInt(editTextB.getText().toString());
            int c = Integer.parseInt(editTextC.getText().toString());

            viewModel.updateValues(a, b, c);
        } catch (NumberFormatException e) {
            viewModel.showError();
            e.printStackTrace();
        }
    }
}

It should works like there:

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