1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package org.chromium.latency.walt; 18 19 20 import android.os.Bundle; 21 import android.support.annotation.Nullable; 22 import android.support.v4.app.DialogFragment; 23 import android.support.v4.app.Fragment; 24 import android.support.v4.app.FragmentTransaction; 25 import android.support.v4.content.ContextCompat; 26 import android.support.v7.preference.Preference; 27 import android.support.v7.preference.PreferenceFragmentCompat; 28 import android.support.v7.preference.PreferenceScreen; 29 import android.support.v7.widget.Toolbar; 30 import android.view.View; 31 32 33 public class SettingsFragment extends PreferenceFragmentCompat implements PreferenceFragmentCompat.OnPreferenceStartScreenCallback { 34 35 private Toolbar toolbar; 36 SettingsFragment()37 public SettingsFragment() { 38 // Required empty public constructor 39 } 40 41 @Override onCreatePreferences(Bundle savedInstanceState, String rootKey)42 public void onCreatePreferences(Bundle savedInstanceState, String rootKey) { 43 // Load the preferences from an XML resource 44 setPreferencesFromResource(R.xml.preferences, rootKey); 45 46 PreferenceScreen prefMidiScreen = 47 (PreferenceScreen) getPreferenceScreen().findPreference("pref_midi_screen"); 48 if (prefMidiScreen != null) { 49 boolean hasMidi = 50 getContext().getPackageManager().hasSystemFeature("android.software.midi"); 51 prefMidiScreen.setVisible(hasMidi); 52 } 53 } 54 55 @Override onCreate(Bundle savedInstanceState)56 public void onCreate(Bundle savedInstanceState) { 57 super.onCreate(savedInstanceState); 58 toolbar = (Toolbar) getActivity().findViewById(R.id.toolbar_main); 59 } 60 61 @Override onViewCreated(View view, @Nullable Bundle savedInstanceState)62 public void onViewCreated(View view, @Nullable Bundle savedInstanceState) { 63 super.onViewCreated(view, savedInstanceState); 64 view.setBackgroundColor(ContextCompat.getColor(getContext(), R.color.ColorBackground)); 65 } 66 67 @Override onDisplayPreferenceDialog(Preference preference)68 public void onDisplayPreferenceDialog(Preference preference) { 69 if (preference instanceof NumberPickerPreference) { 70 DialogFragment fragment = NumberPickerPreference. 71 NumberPickerPreferenceDialogFragmentCompat.newInstance(preference.getKey()); 72 fragment.setTargetFragment(this, 0); 73 fragment.show(getFragmentManager(), 74 "android.support.v7.preference.PreferenceFragment.DIALOG"); 75 } else { 76 super.onDisplayPreferenceDialog(preference); 77 } 78 } 79 80 @Override getCallbackFragment()81 public Fragment getCallbackFragment() { 82 return this; 83 } 84 85 @Override onPreferenceStartScreen(PreferenceFragmentCompat preferenceFragmentCompat, PreferenceScreen preferenceScreen)86 public boolean onPreferenceStartScreen(PreferenceFragmentCompat preferenceFragmentCompat, 87 PreferenceScreen preferenceScreen) { 88 SettingsFragment fragment = new SettingsFragment(); 89 Bundle args = new Bundle(); 90 args.putString(PreferenceFragmentCompat.ARG_PREFERENCE_ROOT, preferenceScreen.getKey()); 91 fragment.setArguments(args); 92 93 FragmentTransaction ft = preferenceFragmentCompat.getFragmentManager().beginTransaction(); 94 ft.add(R.id.fragment_container, fragment, preferenceScreen.getKey()); 95 ft.addToBackStack(preferenceScreen.getTitle().toString()); 96 ft.commit(); 97 98 toolbar.setTitle(preferenceScreen.getTitle()); 99 return true; 100 } 101 102 } 103