| /* |
| * Copyright (C) 2009 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.camera; |
| |
| import android.content.Context; |
| import android.content.SharedPreferences; |
| import android.content.res.TypedArray; |
| import android.util.AttributeSet; |
| import android.util.Log; |
| import android.util.TypedValue; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * A type of <code>CameraPreference</code> whose number of possible values |
| * is limited. |
| */ |
| public class ListPreference extends CameraPreference { |
| private static final String TAG = "ListPreference"; |
| private final String mKey; |
| private String mValue; |
| private final CharSequence[] mDefaultValues; |
| |
| private CharSequence[] mEntries; |
| private CharSequence[] mEntryValues; |
| private boolean mLoaded = false; |
| |
| public ListPreference(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| |
| TypedArray a = context.obtainStyledAttributes( |
| attrs, R.styleable.ListPreference, 0, 0); |
| |
| mKey = Util.checkNotNull( |
| a.getString(R.styleable.ListPreference_key)); |
| |
| // We allow the defaultValue attribute to be a string or an array of |
| // strings. The reason we need multiple default values is that some |
| // of them may be unsupported on a specific platform (for example, |
| // continuous auto-focus). In that case the first supported value |
| // in the array will be used. |
| int attrDefaultValue = R.styleable.ListPreference_defaultValue; |
| TypedValue tv = a.peekValue(attrDefaultValue); |
| if (tv != null && tv.type == TypedValue.TYPE_REFERENCE) { |
| mDefaultValues = a.getTextArray(attrDefaultValue); |
| } else { |
| mDefaultValues = new CharSequence[1]; |
| mDefaultValues[0] = a.getString(attrDefaultValue); |
| } |
| |
| setEntries(a.getTextArray(R.styleable.ListPreference_entries)); |
| setEntryValues(a.getTextArray( |
| R.styleable.ListPreference_entryValues)); |
| a.recycle(); |
| } |
| |
| public String getKey() { |
| return mKey; |
| } |
| |
| public CharSequence[] getEntries() { |
| return mEntries; |
| } |
| |
| public CharSequence[] getEntryValues() { |
| return mEntryValues; |
| } |
| |
| public void setEntries(CharSequence entries[]) { |
| mEntries = entries == null ? new CharSequence[0] : entries; |
| } |
| |
| public void setEntryValues(CharSequence values[]) { |
| mEntryValues = values == null ? new CharSequence[0] : values; |
| } |
| |
| public String getValue() { |
| if (!mLoaded) { |
| mValue = getSharedPreferences().getString(mKey, |
| findSupportedDefaultValue()); |
| mLoaded = true; |
| } |
| return mValue; |
| } |
| |
| // Find the first value in mDefaultValues which is supported. |
| private String findSupportedDefaultValue() { |
| for (int i = 0; i < mDefaultValues.length; i++) { |
| for (int j = 0; j < mEntryValues.length; j++) { |
| // Note that mDefaultValues[i] may be null (if unspecified |
| // in the xml file). |
| if (mEntryValues[j].equals(mDefaultValues[i])) { |
| return mDefaultValues[i].toString(); |
| } |
| } |
| } |
| return null; |
| } |
| |
| public void setValue(String value) { |
| if (findIndexOfValue(value) < 0) throw new IllegalArgumentException(); |
| mValue = value; |
| persistStringValue(value); |
| } |
| |
| public void setValueIndex(int index) { |
| setValue(mEntryValues[index].toString()); |
| } |
| |
| public int findIndexOfValue(String value) { |
| for (int i = 0, n = mEntryValues.length; i < n; ++i) { |
| if (Util.equals(mEntryValues[i], value)) return i; |
| } |
| return -1; |
| } |
| |
| public String getEntry() { |
| return mEntries[findIndexOfValue(getValue())].toString(); |
| } |
| |
| protected void persistStringValue(String value) { |
| SharedPreferences.Editor editor = getSharedPreferences().edit(); |
| editor.putString(mKey, value); |
| editor.apply(); |
| } |
| |
| @Override |
| public void reloadValue() { |
| this.mLoaded = false; |
| } |
| |
| public void filterUnsupported(List<String> supported) { |
| ArrayList<CharSequence> entries = new ArrayList<CharSequence>(); |
| ArrayList<CharSequence> entryValues = new ArrayList<CharSequence>(); |
| for (int i = 0, len = mEntryValues.length; i < len; i++) { |
| if (supported.indexOf(mEntryValues[i].toString()) >= 0) { |
| entries.add(mEntries[i]); |
| entryValues.add(mEntryValues[i]); |
| } |
| } |
| int size = entries.size(); |
| mEntries = entries.toArray(new CharSequence[size]); |
| mEntryValues = entryValues.toArray(new CharSequence[size]); |
| } |
| |
| public void filterDuplicated() { |
| ArrayList<CharSequence> entries = new ArrayList<CharSequence>(); |
| ArrayList<CharSequence> entryValues = new ArrayList<CharSequence>(); |
| for (int i = 0, len = mEntryValues.length; i < len; i++) { |
| if (!entries.contains(mEntries[i])) { |
| entries.add(mEntries[i]); |
| entryValues.add(mEntryValues[i]); |
| } |
| } |
| int size = entries.size(); |
| mEntries = entries.toArray(new CharSequence[size]); |
| mEntryValues = entryValues.toArray(new CharSequence[size]); |
| } |
| |
| public void print() { |
| Log.v(TAG, "Preference key=" + getKey() + ". value=" + getValue()); |
| for (int i = 0; i < mEntryValues.length; i++) { |
| Log.v(TAG, "entryValues[" + i + "]=" + mEntryValues[i]); |
| } |
| } |
| } |