Java tutorial
/* * Copyright 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.quuzz.tbg.recyclerview; import android.content.Context; import android.content.Intent; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.os.Bundle; import android.support.v4.app.FragmentTransaction; import android.view.Menu; import android.view.MenuItem; import android.widget.ViewAnimator; import com.quuzz.tbg.common.activities.ActivityBase; import com.quuzz.tbg.common.logger.Log; import com.quuzz.tbg.common.logger.LogFragment; import com.quuzz.tbg.common.logger.LogWrapper; import com.quuzz.tbg.common.logger.MessageOnlyLogFilter; /** * A simple launcher activity containing a summary sample description, sample log and a custom * {@link android.support.v4.app.Fragment} which can display a view. * <p> * For devices with displays with a width of 720dp or greater, the sample log is always visible, * on other devices it's visibility is controlled by an item on the Action Bar. */ public class MainActivity extends ActivityBase { public static final String TAG = "MainActivity"; // Whether the Log Fragment is currently shown private boolean mLogShown; // Whether there is a Wi-Fi connection. private static boolean wifiConnected = false; // Whether there is a mobile connection. private static boolean mobileConnected = false; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); if (savedInstanceState == null) { checkNetworkConnection(); FragmentTransaction transaction = getSupportFragmentManager().beginTransaction(); RecyclerViewFragment fragment = new RecyclerViewFragment(); fragment.setAppUUID(appUUID); transaction.replace(R.id.sample_content_fragment, fragment); transaction.commit(); } } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.main, menu); return true; } // @Override // public boolean onPrepareOptionsMenu(Menu menu) { // MenuItem logToggle = menu.findItem(R.id.menu_toggle_log); // logToggle.setVisible(findViewById(R.id.sample_output) instanceof ViewAnimator); // logToggle.setTitle(mLogShown ? R.string.sample_hide_log : R.string.sample_show_log); // // return super.onPrepareOptionsMenu(menu); // } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.menu_info: Intent intent = new Intent(MainActivity.this, AppInfoActivity.class); startActivity(intent); return true; // case R.id.menu_toggle_log: // mLogShown = !mLogShown; // ViewAnimator output = (ViewAnimator) findViewById(R.id.sample_output); // if (mLogShown) { // output.setDisplayedChild(1); // } else { // output.setDisplayedChild(0); // } // supportInvalidateOptionsMenu(); // return true; } return super.onOptionsItemSelected(item); } /** * Check whether the device is connected, and if so, whether the connection * is wifi or mobile (it could be something else). */ private void checkNetworkConnection() { ConnectivityManager connMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo activeInfo = connMgr.getActiveNetworkInfo(); if (activeInfo != null && activeInfo.isConnected()) { wifiConnected = activeInfo.getType() == ConnectivityManager.TYPE_WIFI; mobileConnected = activeInfo.getType() == ConnectivityManager.TYPE_MOBILE; if (wifiConnected) { Log.i(TAG, "wifi connected"); } else if (mobileConnected) { Log.i(TAG, "mobile connected"); } } else { Log.i(TAG, "no internet connections"); } } /** Create a chain of targets that will receive log data */ @Override public void initializeLogging() { // Wraps Android's native log framework. LogWrapper logWrapper = new LogWrapper(); // Using Log, front-end to the logging chain, emulates android.util.log method signatures. Log.setLogNode(logWrapper); // Filter strips out everything except the message text. MessageOnlyLogFilter msgFilter = new MessageOnlyLogFilter(); logWrapper.setNext(msgFilter); // On screen logging via a fragment with a TextView. LogFragment logFragment = (LogFragment) getSupportFragmentManager().findFragmentById(R.id.log_fragment); msgFilter.setNext(logFragment.getLogView()); Log.i(TAG, "Ready"); } }