/* * Copyright (C) 2015 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.tv.common; import android.util.Log; import java.lang.reflect.Method; import java.util.ArrayList; import java.util.List; /** * Lazy loaded boolean system property. * *
Set with If the value is cached get the value from {@code android.os.SystemProperties} with the
* default set in the constructor.
*/
public boolean getValue() {
if (mValue == null) {
mValue = getBoolean(mKey, mDefaultValue);
if (DEBUG) Log.d(TAG, mKey + "=" + mValue);
}
return mValue;
}
@Override
public String toString() {
return "SystemProperty[" + mKey + "]=" + getValue();
}
}
adb shell setprop key value
where:
* Values 'n', 'no', '0', 'false' or 'off' are considered false.
* Values 'y', 'yes', '1', 'true' or 'on' are considered true.
* (case sensitive). See android.os.SystemProperties.getBoolean.
*/
public class BooleanSystemProperty {
private final static String TAG = "BooleanSystemProperty";
private final static boolean DEBUG = false;
private static final Listadb shell setprop key value
*
* @param key the property key.
* @param defaultValue the value to return if the property is undefined or empty.
* @return the system property value or the default value.
*/
private static boolean getBoolean(String key, boolean defaultValue) {
try {
final Class> systemProperties = Class.forName("android.os.SystemProperties");
final Method get = systemProperties.getMethod("getBoolean", String.class, Boolean.TYPE);
return (boolean) get.invoke(null, key, defaultValue);
} catch (Exception e) {
Log.e(TAG, "Error getting boolean for " + key, e);
// This should never happen
return defaultValue;
}
}
/**
* Clears the cached value. The next call to getValue will check {@code
* android.os.SystemProperties}.
*/
public void reset() {
mValue = null;
}
/**
* Returns the value of the system property.
*
*