Java tutorial
/** * 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 com.android.settings.applications; import android.app.Activity; import android.app.AlertDialog; import android.app.AppOpsManager; import android.app.Fragment; import android.app.FragmentManager; import android.content.Context; import android.content.DialogInterface; import android.content.SharedPreferences; import android.os.Bundle; import android.preference.PreferenceFrameLayout; import android.support.v13.app.FragmentPagerAdapter; import android.support.v4.view.PagerTabStrip; import android.support.v4.view.ViewPager; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import com.android.settings.R; public class AppOpsSummary extends Fragment { // layout inflater object used to inflate views private LayoutInflater mInflater; private ViewGroup mContentContainer; private View mRootView; private ViewPager mViewPager; private MyPagerAdapter mAdapter; private Activity mActivity; private SharedPreferences mPreferences; CharSequence[] mPageNames; static AppOpsState.OpsTemplate[] sPageTemplates = new AppOpsState.OpsTemplate[] { AppOpsState.LOCATION_TEMPLATE, AppOpsState.PERSONAL_TEMPLATE, AppOpsState.MESSAGING_TEMPLATE, AppOpsState.MEDIA_TEMPLATE, AppOpsState.DEVICE_TEMPLATE, AppOpsState.BOOTUP_TEMPLATE }; int mCurPos; class MyPagerAdapter extends FragmentPagerAdapter implements ViewPager.OnPageChangeListener { public MyPagerAdapter(FragmentManager fm) { super(fm); } @Override public Fragment getItem(int position) { return new AppOpsCategory(sPageTemplates[position]); } @Override public int getCount() { return sPageTemplates.length; } @Override public CharSequence getPageTitle(int position) { return mPageNames[position]; } @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } @Override public void onPageSelected(int position) { mCurPos = position; } public int getCurrentPage() { return mCurPos; } @Override public void onPageScrollStateChanged(int state) { if (state == ViewPager.SCROLL_STATE_IDLE) { //updateCurrentTab(mCurPos); } } } private void resetAdapter() { // trigger adapter load, preserving the selected page int curPos = mAdapter.getCurrentPage(); mViewPager.setAdapter(mAdapter); mViewPager.setOnPageChangeListener(mAdapter); mViewPager.setCurrentItem(curPos); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // initialize the inflater mInflater = inflater; View rootView = mInflater.inflate(R.layout.app_ops_summary, container, false); mContentContainer = container; mRootView = rootView; mPageNames = getResources().getTextArray(R.array.app_ops_categories_cm); mViewPager = (ViewPager) rootView.findViewById(R.id.pager); mAdapter = new MyPagerAdapter(getChildFragmentManager()); mViewPager.setAdapter(mAdapter); mViewPager.setOnPageChangeListener(mAdapter); PagerTabStrip tabs = (PagerTabStrip) rootView.findViewById(R.id.tabs); tabs.setTabIndicatorColorResource(android.R.color.white); // We have to do this now because PreferenceFrameLayout looks at it // only when the view is added. if (container instanceof PreferenceFrameLayout) { ((PreferenceFrameLayout.LayoutParams) rootView.getLayoutParams()).removeBorders = true; } mActivity = getActivity(); return rootView; } private boolean shouldShowUserApps() { return mPreferences.getBoolean("show_user_apps", true); } private boolean shouldShowSystemApps() { return mPreferences.getBoolean("show_system_apps", true); } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); // get shared preferences mPreferences = mActivity.getSharedPreferences("appops_manager", Activity.MODE_PRIVATE); setHasOptionsMenu(true); } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { super.onCreateOptionsMenu(menu, inflater); inflater.inflate(R.menu.appops_manager, menu); menu.findItem(R.id.show_user_apps).setChecked(shouldShowUserApps()); menu.findItem(R.id.show_system_apps).setChecked(shouldShowSystemApps()); } private void resetCounters() { final AppOpsManager appOps = (AppOpsManager) mActivity.getSystemService(Context.APP_OPS_SERVICE); if (appOps == null) { return; } appOps.resetCounters(); // reload content resetAdapter(); } private void resetCountersConfirm() { new AlertDialog.Builder(getActivity()).setIcon(android.R.drawable.ic_dialog_alert) .setTitle(R.string.app_ops_reset_confirm_title).setMessage(R.string.app_ops_reset_confirm_mesg) .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { resetCounters(); } }).setNegativeButton(android.R.string.cancel, null).show(); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.show_user_apps: final String prefNameUserApps = "show_user_apps"; // set the menu checkbox and save it in shared preference item.setChecked(!item.isChecked()); mPreferences.edit().putBoolean(prefNameUserApps, item.isChecked()).commit(); // reload content resetAdapter(); return true; case R.id.show_system_apps: final String prefNameSysApps = "show_system_apps"; // set the menu checkbox and save it in shared preference item.setChecked(!item.isChecked()); mPreferences.edit().putBoolean(prefNameSysApps, item.isChecked()).commit(); // reload view content resetAdapter(); return true; case R.id.reset_counters: resetCountersConfirm(); return true; default: return super.onContextItemSelected(item); } } }