1 /* 2 * Copyright 2013 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 18 19 20 package com.example.android.adaptertransition; 21 22 import android.os.Bundle; 23 import android.support.v4.app.FragmentTransaction; 24 import android.view.Menu; 25 import android.view.MenuItem; 26 import android.widget.ViewAnimator; 27 28 import com.example.android.common.activities.SampleActivityBase; 29 import com.example.android.common.logger.Log; 30 import com.example.android.common.logger.LogFragment; 31 import com.example.android.common.logger.LogWrapper; 32 import com.example.android.common.logger.MessageOnlyLogFilter; 33 34 /** 35 * A simple launcher activity containing a summary sample description, sample log and a custom 36 * {@link android.support.v4.app.Fragment} which can display a view. 37 * <p> 38 * For devices with displays with a width of 720dp or greater, the sample log is always visible, 39 * on other devices it's visibility is controlled by an item on the Action Bar. 40 */ 41 public class MainActivity extends SampleActivityBase { 42 43 public static final String TAG = "MainActivity"; 44 45 // Whether the Log Fragment is currently shown 46 private boolean mLogShown; 47 48 @Override 49 protected void onCreate(Bund le savedInstanceState) { 50 super.onCreate(savedInstanceState); 51 setContentView(R.layout.activity_main); 52 53 FragmentTransaction transaction = getSupportFragmentManager().beginTransaction(); 54 AdapterTransitionFragment fragment = new AdapterTransitionFragment(); 55 transaction.replace(R.id.sample_content_fragment, fragment); 56 transaction.commit(); 57 } 58 59 @Override 60 public boolean onCreateOptionsMenu(Menu menu) { 61 getMenuInflater().inflate(R.menu.main, menu); 62 return true; 63 } 64 65 @Override 66 public boolean onPrepareOptionsMenu(Menu menu) { 67 MenuItem logToggle = menu.findItem(R.id.menu_toggle_log); 68 logToggle.setVisible(findViewById(R.id.sample_output) instanceof ViewAnimator); 69 logToggle.setTitle(mLogShown ? R.string.sample_hide_log : R.string.sample_show_log); 70 71 return super.onPrepareOptionsMenu(menu); 72 } 73 74 @Override 75 public boolean onOptionsItemSelected(MenuItem item) { 76 switch(item.getItemId()) { 77 case R.id.menu_toggle_log: 78 mLogShown = !mLogShown; 79 ViewAnimator output = (ViewAnimator) findViewById(R.id.sample_output); 80 if (mLogShown) { 81 output.setDisplayedChild(1); 82 } else { 83 output.setDisplayedChild(0); 84 } 85 supportInvalidateOptionsMenu(); 86 return true; 87 } 88 return super.onOptionsItemSelected(item); 89 } 90 91 /** Create a chain of targets that will receive log data */ 92 @Override 93 public void initializeLogging() { 94 // Wraps Android's native log framework. 95 LogWrapper logWrapper = new LogWrapper(); 96 // Using Log, front-end to the logging chain, emulates android.util.log method signatures. 97 Log.setLogNode(logWrapper); 98 99 // Filter strips out everything except the message text. 100 MessageOnlyLogFilter msgFilter = new MessageOnlyLogFilter(); 101 logWrapper.setNext(msgFilter); 102 103 // On screen logging via a fragment with a TextView. 104 LogFragment logFragment = (LogFragment) getSupportFragmentManager() 105 .findFragmentById(R.id.log_fragment); 106 msgFilter.setNext(logFragment.getLogView()); 107 108 Log.i(TAG, "Ready"); 109 } 110 }