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      1 /*
      2  * Copyright 2018 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package androidx.preference;
     18 
     19 import static androidx.annotation.RestrictTo.Scope.LIBRARY_GROUP;
     20 
     21 import android.os.Bundle;
     22 import android.view.View;
     23 import android.widget.EditText;
     24 
     25 import androidx.annotation.NonNull;
     26 import androidx.annotation.RestrictTo;
     27 
     28 public class EditTextPreferenceDialogFragmentCompat extends PreferenceDialogFragmentCompat {
     29 
     30     private static final String SAVE_STATE_TEXT = "EditTextPreferenceDialogFragment.text";
     31 
     32     private EditText mEditText;
     33 
     34     private CharSequence mText;
     35 
     36     public static EditTextPreferenceDialogFragmentCompat newInstance(String key) {
     37         final EditTextPreferenceDialogFragmentCompat
     38                 fragment = new EditTextPreferenceDialogFragmentCompat();
     39         final Bundle b = new Bundle(1);
     40         b.putString(ARG_KEY, key);
     41         fragment.setArguments(b);
     42         return fragment;
     43     }
     44 
     45     @Override
     46     public void onCreate(Bundle savedInstanceState) {
     47         super.onCreate(savedInstanceState);
     48         if (savedInstanceState == null) {
     49             mText = getEditTextPreference().getText();
     50         } else {
     51             mText = savedInstanceState.getCharSequence(SAVE_STATE_TEXT);
     52         }
     53     }
     54 
     55     @Override
     56     public void onSaveInstanceState(@NonNull Bundle outState) {
     57         super.onSaveInstanceState(outState);
     58         outState.putCharSequence(SAVE_STATE_TEXT, mText);
     59     }
     60 
     61     @Override
     62     protected void onBindDialogView(View view) {
     63         super.onBindDialogView(view);
     64 
     65         mEditText = view.findViewById(android.R.id.edit);
     66         mEditText.requestFocus();
     67 
     68         if (mEditText == null) {
     69             throw new IllegalStateException("Dialog view must contain an EditText with id" +
     70                     " @android:id/edit");
     71         }
     72 
     73         mEditText.setText(mText);
     74         // Place cursor at the end
     75         mEditText.setSelection(mEditText.getText().length());
     76     }
     77 
     78     private EditTextPreference getEditTextPreference() {
     79         return (EditTextPreference) getPreference();
     80     }
     81 
     82     /** @hide */
     83     @RestrictTo(LIBRARY_GROUP)
     84     @Override
     85     protected boolean needInputMethod() {
     86         // We want the input method to show, if possible, when dialog is displayed
     87         return true;
     88     }
     89 
     90     @Override
     91     public void onDialogClosed(boolean positiveResult) {
     92 
     93         if (positiveResult) {
     94             String value = mEditText.getText().toString();
     95             if (getEditTextPreference().callChangeListener(value)) {
     96                 getEditTextPreference().setText(value);
     97             }
     98         }
     99     }
    100 
    101 }
    102