How to change the focus to next edit text in android?

Question

The User can enter only one digit in the edit text. if he enters the value in

Answer 1

I also had the same problem and I just solved it, simple. With .xml file. Use android:nextFocusDown="next_EditText_id"

Ex:

<EditText
       android:id="@+id/edtUsername"
       android:nextFocusDown="@id/edtPassword"
       style="@style/EditText"
       />

<EditText
       android:id="@+id/edtPassword"
       style="@style/EditText.Password"
       />

Answer 2

First of all Set EditText max length=1 here i take three EditText in xml file.

<EditText
    android:id="@+id/edt1"
    android:layout_width="40dp"
    android:layout_height="40dp"
    android:inputType="number"
    android:textAlignment="center"
    android:singleLine="true"
    android:maxLength="1"
    android:maxLines="1"
    android:imeOptions="actionNext"
    android:layout_margin="5dp"
    android:background="@drawable/edittext_shape_bg"/>


<EditText
    android:id="@+id/edt2"
    android:layout_width="40dp"
    android:layout_height="40dp"
    android:inputType="number"
    android:textAlignment="center"
    android:singleLine="true"
    android:maxLength="1"
    android:imeOptions="actionNext"
    android:maxLines="1"
    android:layout_margin="5dp"
    android:background="@drawable/edittext_shape_bg"/>

<EditText
    android:id="@+id/edt3"
    android:layout_width="40dp"
    android:layout_height="40dp"
    android:inputType="number"
    android:textAlignment="center"
    android:singleLine="true"
    android:maxLength="1"
    android:imeOptions="actionNext"
    android:maxLines="1"
    android:layout_margin="5dp"
    android:background="@drawable/edittext_shape_bg"/>

Then after implement addTextChangeListener in each EditText Which Helps You to Move Forward and Backward.

Here we use StringBuilder to get Final String value.

edt1.addTextChangedListener(new TextWatcher() {
      @Override
      public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

      }

      @Override
      public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

      }

      @Override
      public void afterTextChanged(Editable editable) {
          String edtChar=edt1.getText().toString();
          if(edtChar.length()==1)
          {
              currentCode.append(edtChar);

              edt2.requestFocus();
          }else if(edtChar.length()==0) {
            currentCode.deleteCharAt(0);
              edt1.requestFocus();
          }


      }
  });


    edt2.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void afterTextChanged(Editable editable) {
            String edtChar=edt2.getText().toString();
            if(edtChar.length()==1)
            {
                currentCode.append(edtChar);

                edt3.requestFocus();
            }else if(edtChar.length()==0) {
                currentCode.deleteCharAt(1);
                edt1.requestFocus();
            }


        }
    });
    edt3.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void afterTextChanged(Editable editable) {
            String edtChar=edt3.getText().toString();
            if(edtChar.length()==1)
            {
                currentCode.append(edtChar);

                edt4.requestFocus();
            }else if(edtChar.length()==0) {
                currentCode.deleteCharAt(2);
                edt2.requestFocus();
            }


        }
    });

Answer 3

You can use use a hidden EditText receive input, four TextView to display the password.

example:

dialog_passworld.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="10dip"
    android:paddingLeft="20dip"
    android:paddingRight="20dip"
    android:paddingTop="10dip" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:text="Please enter a password"
        android:textSize="16sp" />

    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="40dip"
        android:layout_marginTop="15dip" >

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

        <LinearLayout
            android:id="@+id/passcode_container"
            android:layout_width="match_parent"
            android:layout_height="40dip"
            android:background="@drawable/password_border" >

            <TextView
                android:layout_width="0dip"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:background="@android:color/transparent"
                android:gravity="center"
                android:textSize="18sp"
                android:textStyle="bold" />

            <View
                android:layout_width="1px"
                android:layout_height="match_parent"
                android:background="@android:color/darker_gray" />

            <TextView
                android:layout_width="0dip"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:background="@android:color/transparent"
                android:gravity="center"
                android:textSize="16sp"
                android:textStyle="bold" />

            <View
                android:layout_width="1px"
                android:layout_height="match_parent"
                android:background="@android:color/darker_gray" />

            <TextView
                android:layout_width="0dip"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:background="@android:color/transparent"
                android:gravity="center"
                android:textSize="16sp"
                android:textStyle="bold" />

            <View
                android:layout_width="1px"
                android:layout_height="match_parent"
                android:background="@android:color/darker_gray" />

            <TextView
                android:layout_width="0dip"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:background="@android:color/transparent"
                android:gravity="center"
                android:textSize="16sp"
                android:textStyle="bold" />
        </LinearLayout>
    </FrameLayout>

</LinearLayout>

PasswordDialogBuilder.java

public class PasswordDialogBuilder extends AlertDialog.Builder {

    public PasswordDialogBuilder(Context context) {
        super(context, displayMetrics, eventManager);

        View contentView = LayoutInflater.from(context).inflate(R.layout.dialog_password, null);

        LinearLayout passcodeContainer = (LinearLayout) contentView.findViewById(R.id.passcode_container);

        final List<TextView> passwordViews = new ArrayList<TextView>();

        int childCount = passcodeContainer.getChildCount();
        for (int i = 0; i < childCount; i++) {
            View childView = passcodeContainer.getChildAt(i);
            if (childView instanceof TextView) {
                passwordViews.add((TextView) childView);
            }
        }

        final int passwordCount = passwordViews.size();

        EditText passwordView = (EditText) contentView.findViewById(R.id.passcode);
        passwordView.setFilters(new InputFilter[] {new InputFilter.LengthFilter(passwordCount)});
        passwordView.setInputType(EditorInfo.TYPE_CLASS_NUMBER);
        passwordView.setCursorVisible(false);
        passwordView.setTextColor(Color.TRANSPARENT);
        passwordView.setBackgroundColor(Color.TRANSPARENT);
        passwordView.setSingleLine();

        passwordView.addTextChangedListener(new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {}

            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {}

            @Override
            public void afterTextChanged(Editable s) {
                int passwordLength = s.length();

                for (int i = 0; i < passwordCount; i++) {
                    TextView passcodeView = passwordViews.get(i);
                    if (i < passwordLength) {
                        passcodeView.setText(String.valueOf(s.charAt(i)));
                    } else {
                        passcodeView.setText(StringUtils.EMPTY);
                    }
                }

                if (positiveButton != null) {
                    positiveButton.setEnabled(passwordLength == passwordCount);
                }
            }
        });

        setView(contentView);
    }
}