EditTextPreference - only numeric value inputType - isn't working

Answer 1

It happens when using android.support.v14.preference.PreferenceFragment or android.support.v7.preference.PreferenceFragmentCompat even after choosing android:inputType="numberDecimal". This issue could be overcome by using android.preference.PreferenceFragment. Unfortunately, it's deprecated in API level 28.

Even refactoring to AndroidX, using androidx.preference.PreferenceFragment or androidx.preference.PreferenceFragmentCompat didn't fix the issue.

Answer 2

android.support.v7.preference.EditTextPreference doesn't contain getEditText() method.

But we can extends android.support.v7.preference.EditTextPreferenceDialogFragmentCompat to set inputType.

public class EditTextPreferenceDialogFragmentCompat extends android.support.v7.preference.EditTextPreferenceDialogFragmentCompat {

private EditText mEditText;
private int mInputType;

public static EditTextPreferenceDialogFragmentCompat newInstance(String key, int inputType) {
    EditTextPreferenceDialogFragmentCompat fragment = new EditTextPreferenceDialogFragmentCompat();
    Bundle b = new Bundle(2);
    b.putString("key", key);
    b.putInt("inputType", inputType);
    fragment.setArguments(b);
    return fragment;
}

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    mInputType = this.getArguments().getInt("inputType");
}

protected void onBindDialogView(View view) {
    this.mEditText = view.findViewById(android.R.id.edit);
    mEditText.setInputType(mInputType);
    super.onBindDialogView(view);
}

}

Then make your activity implements PreferenceFragmentCompat.OnPreferenceDisplayDialogCallback

Use your EditTextPreferenceDialogFragmentCompat instead of android.support.v7.preference.EditTextPreferenceDialogFragmentCompat

public boolean onPreferenceDisplayDialog(@NonNull PreferenceFragmentCompat preferenceFragmentCompat, Preference preference) {
String key = preference.getKey();
if (/**show your dialog*/) {
    EditTextPreferenceDialogFragmentCompat f = EditTextPreferenceDialogFragmentCompat.newInstance(preference.getKey(), InputType.TYPE_CLASS_NUMBER | InputType.TYPE_NUMBER_FLAG_SIGNED);
    f.setTargetFragment(this, 0);
    f.show(getFragmentManager(), "android.support.v14.preference.PreferenceFragment.DIALOG");
    return true;
}
return false;

}

just use android.support.v7.preference.EditTextPreference in xml

<android.support.v7.preference.PreferenceScreen
    xmlns:android="http://schemas.android.com/apk/res/android">
    <android.support.v7.preference.EditTextPreference
        .../>
</android.support.v7.preference.PreferenceScreen>

Answer 3

EditTextPreference widgets should take the same attributes as a regular EditText, so use:

android:inputType="number"

Answer 4

android:digits="0123456789"

use this in edittext as it accepts only defined numbers. if its not working then use Android-Support-Preference-V7-Fix library.

Fixed EditTextPreference forwards the XML attributes (like inputType) to the EditText, just like the original preference did.

Answer 5

I agree that original support preferences has some issues, but for resolving this issue we just need add custom layout and specify EditText with android:inputType="number"

<android.support.v7.preference.EditTextPreference
            android:dialogLayout="@layout/preference_dialog_edittext_custom"

So that you may copy original preference_dialog_layout.xml file and edit it.

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_marginTop="48dp"
    android:layout_marginBottom="48dp"
    android:overScrollMode="ifContentScrolls">

  <LinearLayout
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_marginStart="24dp"
      android:layout_marginEnd="24dp"
      android:orientation="vertical">

    <TextView android:id="@android:id/message"
        style="?android:attr/textAppearanceSmall"
        android:layout_marginBottom="48dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textColor="?android:attr/textColorSecondary" />

    <EditText
        android:id="@android:id/edit"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inputType="number"
        android:layout_marginStart="-4dp"
        android:layout_marginEnd="-4dp" />

  </LinearLayout>

</ScrollView>

Answer 6

You can retrieve the EditText from the Preference and from there setInputTypes or use KeyListeners to inform the keyboard:

EditText et = (EditText) editTextPref.getEditText();
et.setKeyListener(DigitsKeyListener.getInstance());

found the answer on older thread