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      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 package com.example.android.recyclerview;
     19 
     20 import android.os.Bundle;
     21 import android.support.v4.app.FragmentTransaction;
     22 import android.view.Menu;
     23 import android.view.MenuItem;
     24 import android.widget.ViewAnimator;
     25 
     26 import com.example.android.common.activities.SampleActivityBase;
     27 import com.example.android.common.logger.Log;
     28 import com.example.android.common.logger.LogFragment;
     29 import com.example.android.common.logger.LogWrapper;
     30 import com.example.android.common.logger.MessageOnlyLogFilter;
     31 
     32 /**
     33  * A simple launcher activity containing a summary sample description, sample log and a custom
     34  * {@link android.support.v4.app.Fragment} which can display a view.
     35  * <p>
     36  * For devices with displays with a width of 720dp or greater, the sample log is always visible,
     37  * on other devices it's visibility is controlled by an item on the Action Bar.
     38  */
     39 public class MainActivity extends SampleActivityBase {
     40 
     41     public static final String TAG = "MainActivity";
     42 
     43     // Whether the Log Fragment is currently shown
     44     private boolean mLogShown;
     45 
     46     @Override
     47     protected void onCreate(Bundle savedInstanceState) {
     48         super.onCreate(savedInstanceState);
     49         setContentView(R.layout.activity_main);
     50 
     51         if (savedInstanceState == null) {
     52             FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
     53             RecyclerViewFragment fragment = new RecyclerViewFragment();
     54             transaction.replace(R.id.sample_content_fragment, fragment);
     55             transaction.commit();
     56         }
     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 }
    111