/*
* Copyright (C) 2013 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 android.support.v4.preference;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.preference.Preference;
import android.preference.PreferenceManager;
import android.preference.PreferenceScreen;
import android.util.Log;
public class PreferenceManagerCompat {
private static final String TAG = PreferenceManagerCompat.class.getSimpleName();
/**
* Interface definition for a callback to be invoked when a
* {@link Preference} in the hierarchy rooted at this {@link PreferenceScreen} is
* clicked.
*/
interface OnPreferenceTreeClickListener {
/**
* Called when a preference in the tree rooted at this
* {@link PreferenceScreen} has been clicked.
*
* @param preferenceScreen The {@link PreferenceScreen} that the
* preference is located in.
* @param preference The preference that was clicked.
* @return Whether the click was handled.
*/
boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference);
}
static PreferenceManager newInstance(Activity activity, int firstRequestCode) {
try {
Constructor<PreferenceManager> c = PreferenceManager.class.getDeclaredConstructor(Activity.class, int.class);
c.setAccessible(true);
return c.newInstance(activity, firstRequestCode);
} catch (Exception e) {
Log.w(TAG, "Couldn't call constructor PreferenceManager by reflection", e);
}
return null;
}
/**
* Sets the owning preference fragment
*/
static void setFragment(PreferenceManager manager, PreferenceFragment fragment) {
// stub
}
/**
* Sets the callback to be invoked when a {@link Preference} in the
* hierarchy rooted at this {@link PreferenceManager} is clicked.
*
* @param listener The callback to be invoked.
*/
static void setOnPreferenceTreeClickListener(PreferenceManager manager, final OnPreferenceTreeClickListener listener) {
try {
Field onPreferenceTreeClickListener = PreferenceManager.class.getDeclaredField("mOnPreferenceTreeClickListener");
onPreferenceTreeClickListener.setAccessible(true);
if (listener != null) {
Object proxy = Proxy.newProxyInstance(
onPreferenceTreeClickListener.getType().getClassLoader(),
new Class[] { onPreferenceTreeClickListener.getType() },
new InvocationHandler() {
public Object invoke(Object proxy, Method method, Object[] args) {
if (method.getName().equals("onPreferenceTreeClick")) {
return Boolean.valueOf(listener.onPreferenceTreeClick((PreferenceScreen) args[0], (Preference) args[1]));
} else {
return null;
}
}
});
onPreferenceTreeClickListener.set(manager, proxy);
} else {
onPreferenceTreeClickListener.set(manager, null);
}
} catch (Exception e) {
Log.w(TAG, "Couldn't set PreferenceManager.mOnPreferenceTreeClickListener by reflection", e);
}
}
/**
* Inflates a preference hierarchy from the preference hierarchies of
* {@link Activity Activities} that match the given {@link Intent}. An
* {@link Activity} defines its preference hierarchy with meta-data using
* the {@link #METADATA_KEY_PREFERENCES} key.
* <p>
* If a preference hierarchy is given, the new preference hierarchies will
* be merged in.
*
* @param queryIntent The intent to match activities.
* @param rootPreferences Optional existing hierarchy to merge the new
* hierarchies into.
* @return The root hierarchy (if one was not provided, the new hierarchy's
* root).
*/
static PreferenceScreen inflateFromIntent(PreferenceManager manager, Intent intent, PreferenceScreen screen) {
try {
Method m = PreferenceManager.class.getDeclaredMethod("inflateFromIntent", Intent.class, PreferenceScreen.class);
m.setAccessible(true);
PreferenceScreen prefScreen = (PreferenceScreen) m.invoke(manager, intent, screen);
return prefScreen;
} catch (Exception e) {
Log.w(TAG, "Couldn't call PreferenceManager.inflateFromIntent by reflection", e);
}
return null;
}
/**
* Inflates a preference hierarchy from XML. If a preference hierarchy is
* given, the new preference hierarchies will be merged in.
*
* @param context The context of the resource.
* @param resId The resource ID of the XML to inflate.
* @param rootPreferences Optional existing hierarchy to merge the new
* hierarchies into.
* @return The root hierarchy (if one was not provided, the new hierarchy's
* root).
* @hide
*/
static PreferenceScreen inflateFromResource(PreferenceManager manager, Activity activity, int resId, PreferenceScreen screen) {
try {
Method m = PreferenceManager.class.getDeclaredMethod("inflateFromResource", Context.class, int.class, PreferenceScreen.class);
m.setAccessible(true);
PreferenceScreen prefScreen = (PreferenceScreen) m.invoke(manager, activity, resId, screen);
return prefScreen;
} catch (Exception e) {
Log.w(TAG, "Couldn't call PreferenceManager.inflateFromResource by reflection", e);
}
return null;
}
/**
* Returns the root of the preference hierarchy managed by this class.
*
* @return The {@link PreferenceScreen} object that is at the root of the hierarchy.
*/
static PreferenceScreen getPreferenceScreen(PreferenceManager manager) {
try {
Method m = PreferenceManager.class.getDeclaredMethod("getPreferenceScreen");
m.setAccessible(true);
return (PreferenceScreen) m.invoke(manager);
} catch (Exception e) {
Log.w(TAG, "Couldn't call PreferenceManager.getPreferenceScreen by reflection", e);
}
return null;
}
/**
* Called by the {@link PreferenceManager} to dispatch a subactivity result.
*/
static void dispatchActivityResult(PreferenceManager manager, int requestCode, int resultCode, Intent data) {
try {
Method m = PreferenceManager.class.getDeclaredMethod("dispatchActivityResult", int.class, int.class, Intent.class);
m.setAccessible(true);
m.invoke(manager, requestCode, resultCode, data);
} catch (Exception e) {
Log.w(TAG, "Couldn't call PreferenceManager.dispatchActivityResult by reflection", e);
}
}
/**
* Called by the {@link PreferenceManager} to dispatch the activity stop
* event.
*/
static void dispatchActivityStop(PreferenceManager manager) {
try {
Method m = PreferenceManager.class.getDeclaredMethod("dispatchActivityStop");
m.setAccessible(true);
m.invoke(manager);
} catch (Exception e) {
Log.w(TAG, "Couldn't call PreferenceManager.dispatchActivityStop by reflection", e);
}
}
/**
* Called by the {@link PreferenceManager} to dispatch the activity destroy
* event.
*/
static void dispatchActivityDestroy(PreferenceManager manager) {
try {
Method m = PreferenceManager.class.getDeclaredMethod("dispatchActivityDestroy");
m.setAccessible(true);
m.invoke(manager);
} catch (Exception e) {
Log.w(TAG, "Couldn't call PreferenceManager.dispatchActivityDestroy by reflection", e);
}
}
/**
* Sets the root of the preference hierarchy.
*
* @param preferenceScreen The root {@link PreferenceScreen} of the preference hierarchy.
* @return Whether the {@link PreferenceScreen} given is different than the previous.
*/
static boolean setPreferences(PreferenceManager manager, PreferenceScreen screen) {
try {
Method m = PreferenceManager.class.getDeclaredMethod("setPreferences", PreferenceScreen.class);
m.setAccessible(true);
return ((Boolean) m.invoke(manager, screen));
} catch (Exception e) {
Log.w(TAG, "Couldn't call PreferenceManager.setPreferences by reflection", e);
}
return false;
}
}