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