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/*
* Copyright (C) 2008 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.settings;
import android.app.Fragment;
import android.content.Intent;
import android.os.Bundle;
import android.preference.PreferenceActivity;
import java.util.List;
/**
* Top-level settings activity to handle single pane and double pane UI layout.
*/
public class Settings extends PreferenceActivity implements
SettingsPreferenceFragment.FragmentStarter {
// TODO: Update Call Settings based on airplane mode state.
/**
* Checks if the component name in the intent is different from the Settings class and
* returns the class name to load as a fragment.
*/
private String getStartingFragmentClass(Intent intent) {
final String intentClass = intent.getComponent().getClassName();
if (intentClass.equals(getClass().getName())) return null;
return intentClass;
}
/**
* Override initial header when an activity-alias is causing Settings to be launched
* for a specific fragment encoded in the android:name parameter.
*/
@Override
public Header onGetInitialHeader() {
String fragmentClass = getStartingFragmentClass(super.getIntent());
if (fragmentClass != null) {
Header header = new Header();
header.fragment = fragmentClass;
return header;
}
return super.onGetInitialHeader();
}
/**
* Populate the activity with the top-level headers.
*/
@Override
public void onBuildHeaders(List<Header> target) {
loadHeadersFromResource(R.xml.settings_headers, target);
updateHeaderList(target);
}
private void updateHeaderList(List<Header> target) {
int i = 0;
while (i < target.size()) {
Header header = target.get(i);
long id = header.id;
if (id == R.id.dock_settings) {
if (!needsDockSettings())
target.remove(header);
} else if (id == R.id.operator_settings || id == R.id.manufacturer_settings) {
Utils.updateHeaderToSpecificActivityFromMetaDataOrRemove(this, target, header);
} else if (id == R.id.call_settings) {
if (!Utils.isVoiceCapable(this))
target.remove(header);
}
if (target.get(i) == header)
i++;
}
}
private boolean needsDockSettings() {
return getResources().getBoolean(R.bool.has_dock_settings);
}
public boolean startFragment(Fragment caller, String fragmentClass, int requestCode,
Bundle extras) {
Fragment f = Fragment.instantiate(this, fragmentClass, extras);
caller.setTargetFragment(f, requestCode);
if (f instanceof SettingsPreferenceFragment) {
SettingsPreferenceFragment spf = (SettingsPreferenceFragment) f;
spf.setFragmentStarter(this);
}
return true;
}
}
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