1 /* 2 * Copyright (C) 2017 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 com.android.settings.widget; 18 19 import android.content.Context; 20 import android.text.Editable; 21 import android.text.InputType; 22 import android.text.TextUtils; 23 import android.text.TextWatcher; 24 import android.util.AttributeSet; 25 import android.view.View; 26 import android.widget.EditText; 27 import android.widget.TextView; 28 29 import androidx.annotation.VisibleForTesting; 30 import androidx.appcompat.app.AlertDialog; 31 import androidx.preference.PreferenceViewHolder; 32 33 import com.android.settingslib.CustomEditTextPreferenceCompat; 34 35 /** 36 * {@code EditTextPreference} that supports input validation. 37 */ 38 public class ValidatedEditTextPreference extends CustomEditTextPreferenceCompat { 39 40 public interface Validator { isTextValid(String value)41 boolean isTextValid(String value); 42 } 43 44 private final EditTextWatcher mTextWatcher = new EditTextWatcher(); 45 private Validator mValidator; 46 private boolean mIsPassword; 47 private boolean mIsSummaryPassword; 48 ValidatedEditTextPreference(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes)49 public ValidatedEditTextPreference(Context context, AttributeSet attrs, 50 int defStyleAttr, int defStyleRes) { 51 super(context, attrs, defStyleAttr, defStyleRes); 52 } 53 ValidatedEditTextPreference(Context context, AttributeSet attrs, int defStyleAttr)54 public ValidatedEditTextPreference(Context context, AttributeSet attrs, int defStyleAttr) { 55 super(context, attrs, defStyleAttr); 56 } 57 ValidatedEditTextPreference(Context context, AttributeSet attrs)58 public ValidatedEditTextPreference(Context context, AttributeSet attrs) { 59 super(context, attrs); 60 } 61 ValidatedEditTextPreference(Context context)62 public ValidatedEditTextPreference(Context context) { 63 super(context); 64 } 65 66 @Override onBindDialogView(View view)67 protected void onBindDialogView(View view) { 68 super.onBindDialogView(view); 69 final EditText editText = view.findViewById(android.R.id.edit); 70 if (editText != null && !TextUtils.isEmpty(editText.getText())) { 71 editText.setSelection(editText.getText().length()); 72 } 73 if (mValidator != null && editText != null) { 74 editText.removeTextChangedListener(mTextWatcher); 75 if (mIsPassword) { 76 editText.setInputType( 77 InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD); 78 editText.setMaxLines(1); 79 } 80 editText.addTextChangedListener(mTextWatcher); 81 } 82 } 83 84 @Override onBindViewHolder(PreferenceViewHolder holder)85 public void onBindViewHolder(PreferenceViewHolder holder) { 86 super.onBindViewHolder(holder); 87 88 final TextView textView = (TextView) holder.findViewById(android.R.id.summary); 89 if (textView == null) { 90 return; 91 } 92 if (mIsSummaryPassword) { 93 textView.setInputType( 94 InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD); 95 } else { 96 textView.setInputType( 97 InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS); 98 } 99 } 100 setIsPassword(boolean isPassword)101 public void setIsPassword(boolean isPassword) { 102 mIsPassword = isPassword; 103 } 104 setIsSummaryPassword(boolean isPassword)105 public void setIsSummaryPassword(boolean isPassword) { 106 mIsSummaryPassword = isPassword; 107 } 108 109 @VisibleForTesting(otherwise = VisibleForTesting.NONE) isPassword()110 public boolean isPassword() { 111 return mIsPassword; 112 } 113 setValidator(Validator validator)114 public void setValidator(Validator validator) { 115 mValidator = validator; 116 } 117 118 private class EditTextWatcher implements TextWatcher { 119 @Override onTextChanged(CharSequence s, int start, int before, int count)120 public void onTextChanged(CharSequence s, int start, int before, int count) { 121 } 122 123 @Override beforeTextChanged(CharSequence s, int start, int before, int count)124 public void beforeTextChanged(CharSequence s, int start, int before, int count) { 125 } 126 127 @Override afterTextChanged(Editable s)128 public void afterTextChanged(Editable s) { 129 final EditText editText = getEditText(); 130 if (mValidator != null && editText != null) { 131 final AlertDialog dialog = (AlertDialog) getDialog(); 132 final boolean valid = mValidator.isTextValid(editText.getText().toString()); 133 dialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(valid); 134 } 135 } 136 } 137 138 } 139