The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2007 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 android.preference; |
| 18 | |
| 19 | |
| 20 | import android.content.Context; |
| 21 | import android.content.SharedPreferences; |
| 22 | import android.content.res.TypedArray; |
| 23 | import android.os.Parcel; |
| 24 | import android.os.Parcelable; |
| 25 | import android.text.TextUtils; |
| 26 | import android.util.AttributeSet; |
| 27 | import android.view.View; |
| 28 | import android.view.ViewGroup; |
| 29 | import android.view.ViewParent; |
| 30 | import android.widget.EditText; |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 31 | |
| 32 | /** |
| 33 | * A {@link Preference} that allows for string |
| 34 | * input. |
| 35 | * <p> |
| 36 | * It is a subclass of {@link DialogPreference} and shows the {@link EditText} |
| 37 | * in a dialog. This {@link EditText} can be modified either programmatically |
| 38 | * via {@link #getEditText()}, or through XML by setting any EditText |
| 39 | * attributes on the EditTextPreference. |
| 40 | * <p> |
| 41 | * This preference will store a string into the SharedPreferences. |
| 42 | * <p> |
| 43 | * See {@link android.R.styleable#EditText EditText Attributes}. |
| 44 | */ |
| 45 | public class EditTextPreference extends DialogPreference { |
| 46 | /** |
| 47 | * The edit text shown in the dialog. |
| 48 | */ |
| 49 | private EditText mEditText; |
| 50 | |
| 51 | private String mText; |
| 52 | |
| 53 | public EditTextPreference(Context context, AttributeSet attrs, int defStyle) { |
| 54 | super(context, attrs, defStyle); |
| 55 | |
| 56 | mEditText = new EditText(context, attrs); |
| 57 | |
| 58 | // Give it an ID so it can be saved/restored |
| 59 | mEditText.setId(com.android.internal.R.id.edit); |
| 60 | |
| 61 | /* |
| 62 | * The preference framework and view framework both have an 'enabled' |
| 63 | * attribute. Most likely, the 'enabled' specified in this XML is for |
| 64 | * the preference framework, but it was also given to the view framework. |
| 65 | * We reset the enabled state. |
| 66 | */ |
| 67 | mEditText.setEnabled(true); |
| 68 | } |
| 69 | |
| 70 | public EditTextPreference(Context context, AttributeSet attrs) { |
| 71 | this(context, attrs, com.android.internal.R.attr.editTextPreferenceStyle); |
| 72 | } |
| 73 | |
| 74 | public EditTextPreference(Context context) { |
| 75 | this(context, null); |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * Saves the text to the {@link SharedPreferences}. |
| 80 | * |
| 81 | * @param text The text to save |
| 82 | */ |
| 83 | public void setText(String text) { |
| 84 | final boolean wasBlocking = shouldDisableDependents(); |
| 85 | |
| 86 | mText = text; |
| 87 | |
| 88 | persistString(text); |
| 89 | |
| 90 | final boolean isBlocking = shouldDisableDependents(); |
| 91 | if (isBlocking != wasBlocking) { |
| 92 | notifyDependencyChange(isBlocking); |
| 93 | } |
| 94 | } |
| 95 | |
| 96 | /** |
| 97 | * Gets the text from the {@link SharedPreferences}. |
| 98 | * |
| 99 | * @return The current preference value. |
| 100 | */ |
| 101 | public String getText() { |
| 102 | return mText; |
| 103 | } |
| 104 | |
| 105 | @Override |
| 106 | protected void onBindDialogView(View view) { |
| 107 | super.onBindDialogView(view); |
| 108 | |
| 109 | EditText editText = mEditText; |
| 110 | editText.setText(getText()); |
| 111 | |
| 112 | ViewParent oldParent = editText.getParent(); |
| 113 | if (oldParent != view) { |
| 114 | if (oldParent != null) { |
| 115 | ((ViewGroup) oldParent).removeView(editText); |
| 116 | } |
| 117 | onAddEditTextToDialogView(view, editText); |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | /** |
| 122 | * Adds the EditText widget of this preference to the dialog's view. |
| 123 | * |
| 124 | * @param dialogView The dialog view. |
| 125 | */ |
| 126 | protected void onAddEditTextToDialogView(View dialogView, EditText editText) { |
| 127 | ViewGroup container = (ViewGroup) dialogView |
| 128 | .findViewById(com.android.internal.R.id.edittext_container); |
| 129 | if (container != null) { |
Romain Guy | 980a938 | 2010-01-08 15:06:28 -0800 | [diff] [blame] | 130 | container.addView(editText, ViewGroup.LayoutParams.MATCH_PARENT, |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 131 | ViewGroup.LayoutParams.WRAP_CONTENT); |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | @Override |
| 136 | protected void onDialogClosed(boolean positiveResult) { |
| 137 | super.onDialogClosed(positiveResult); |
| 138 | |
| 139 | if (positiveResult) { |
| 140 | String value = mEditText.getText().toString(); |
| 141 | if (callChangeListener(value)) { |
| 142 | setText(value); |
| 143 | } |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | @Override |
| 148 | protected Object onGetDefaultValue(TypedArray a, int index) { |
| 149 | return a.getString(index); |
| 150 | } |
| 151 | |
| 152 | @Override |
| 153 | protected void onSetInitialValue(boolean restoreValue, Object defaultValue) { |
| 154 | setText(restoreValue ? getPersistedString(mText) : (String) defaultValue); |
| 155 | } |
| 156 | |
| 157 | @Override |
| 158 | public boolean shouldDisableDependents() { |
| 159 | return TextUtils.isEmpty(mText) || super.shouldDisableDependents(); |
| 160 | } |
| 161 | |
| 162 | /** |
| 163 | * Returns the {@link EditText} widget that will be shown in the dialog. |
| 164 | * |
| 165 | * @return The {@link EditText} widget that will be shown in the dialog. |
| 166 | */ |
| 167 | public EditText getEditText() { |
| 168 | return mEditText; |
| 169 | } |
| 170 | |
Amith Yamasani | 1d45857 | 2009-09-15 10:25:51 -0700 | [diff] [blame] | 171 | /** @hide */ |
| 172 | @Override |
| 173 | protected boolean needInputMethod() { |
| 174 | // We want the input method to show, if possible, when dialog is displayed |
| 175 | return true; |
| 176 | } |
| 177 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 178 | @Override |
| 179 | protected Parcelable onSaveInstanceState() { |
| 180 | final Parcelable superState = super.onSaveInstanceState(); |
| 181 | if (isPersistent()) { |
| 182 | // No need to save instance state since it's persistent |
| 183 | return superState; |
| 184 | } |
| 185 | |
| 186 | final SavedState myState = new SavedState(superState); |
| 187 | myState.text = getText(); |
| 188 | return myState; |
| 189 | } |
| 190 | |
| 191 | @Override |
| 192 | protected void onRestoreInstanceState(Parcelable state) { |
| 193 | if (state == null || !state.getClass().equals(SavedState.class)) { |
| 194 | // Didn't save state for us in onSaveInstanceState |
| 195 | super.onRestoreInstanceState(state); |
| 196 | return; |
| 197 | } |
| 198 | |
| 199 | SavedState myState = (SavedState) state; |
| 200 | super.onRestoreInstanceState(myState.getSuperState()); |
| 201 | setText(myState.text); |
| 202 | } |
| 203 | |
| 204 | private static class SavedState extends BaseSavedState { |
| 205 | String text; |
| 206 | |
| 207 | public SavedState(Parcel source) { |
| 208 | super(source); |
| 209 | text = source.readString(); |
| 210 | } |
| 211 | |
| 212 | @Override |
| 213 | public void writeToParcel(Parcel dest, int flags) { |
| 214 | super.writeToParcel(dest, flags); |
| 215 | dest.writeString(text); |
| 216 | } |
| 217 | |
| 218 | public SavedState(Parcelable superState) { |
| 219 | super(superState); |
| 220 | } |
| 221 | |
| 222 | public static final Parcelable.Creator<SavedState> CREATOR = |
| 223 | new Parcelable.Creator<SavedState>() { |
| 224 | public SavedState createFromParcel(Parcel in) { |
| 225 | return new SavedState(in); |
| 226 | } |
| 227 | |
| 228 | public SavedState[] newArray(int size) { |
| 229 | return new SavedState[size]; |
| 230 | } |
| 231 | }; |
| 232 | } |
| 233 | |
| 234 | } |