/* * 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 com.android.camera.R; import java.util.ArrayList; import java.util.List; /** * A type of CameraPreference whose number of possible values * is limited. */ public class ListPreference extends CameraPreference { private final String TAG = "ListPreference"; private final String mKey; private String mValue; private final String mDefaultValue; 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)); mDefaultValue = a.getString(R.styleable.ListPreference_defaultValue); 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, mDefaultValue); mLoaded = true; } return mValue; } 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 supported) { ArrayList entries = new ArrayList(); ArrayList entryValues = new ArrayList(); 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 print() { Log.v(TAG, "Preference key=" + getKey() + ". value=" + getValue()); for (int i = 0; i < mEntryValues.length; i++) { Log.v(TAG, "entryValues[" + i + "]=" + mEntryValues[i]); } } }