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      1 /*
      2  * Copyright (C) 2016 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.android.multiwindowplayground.activities;
     18 
     19 import com.android.multiwindowplayground.R;
     20 import com.example.android.common.logger.Log;
     21 import com.example.android.common.logger.LogFragment;
     22 import com.example.android.common.logger.LogWrapper;
     23 import com.example.android.common.logger.MessageOnlyLogFilter;
     24 
     25 import android.content.res.Configuration;
     26 import android.os.Bundle;
     27 import android.os.PersistableBundle;
     28 import android.support.annotation.ColorRes;
     29 import android.support.annotation.StringRes;
     30 import android.support.v7.app.AppCompatActivity;
     31 import android.view.View;
     32 import android.widget.TextView;
     33 
     34 /**
     35  * Activity that logs all key lifecycle callbacks to {@link Log}.
     36  * Output is also logged to the UI into a {@link LogFragment} through {@link #initializeLogging()}
     37  * and {@link #stopLogging()}.
     38  */
     39 public abstract class LoggingActivity extends AppCompatActivity {
     40 
     41     protected String mLogTag = getClass().getSimpleName();
     42 
     43     @Override
     44     protected void onCreate(Bundle savedInstanceState) {
     45         super.onCreate(savedInstanceState);
     46         Log.d(mLogTag, "onCreate");
     47 
     48 
     49     }
     50 
     51     @Override
     52     public void onPostCreate(Bundle savedInstanceState, PersistableBundle persistentState) {
     53         super.onPostCreate(savedInstanceState, persistentState);
     54         Log.d(mLogTag, "onPostCreate");
     55     }
     56 
     57     @Override
     58     protected void onPause() {
     59         super.onPause();
     60         Log.d(mLogTag, "onPause");
     61     }
     62 
     63     @Override
     64     protected void onDestroy() {
     65         super.onDestroy();
     66         Log.d(mLogTag, "onDestroy");
     67     }
     68 
     69     @Override
     70     protected void onResume() {
     71         super.onResume();
     72         Log.d(mLogTag, "onResume");
     73     }
     74 
     75     @Override
     76     public void onConfigurationChanged(Configuration newConfig) {
     77         super.onConfigurationChanged(newConfig);
     78         Log.d(mLogTag, "onConfigurationChanged: " + newConfig.toString());
     79     }
     80 
     81     @Override
     82     protected void onPostCreate(Bundle savedInstanceState) {
     83         super.onPostCreate(savedInstanceState);
     84         Log.d(mLogTag, "onPostCreate");
     85     }
     86 
     87     @Override
     88     protected void onStart() {
     89         super.onStart();
     90         // Start logging to UI.
     91         initializeLogging();
     92 
     93         Log.d(mLogTag, "onStart");
     94     }
     95 
     96     @Override
     97     protected void onStop() {
     98         super.onStop();
     99         // Stop logging to UI when this activity is stopped.
    100         stopLogging();
    101 
    102         Log.d(mLogTag, "onStop");
    103     }
    104 
    105     @Override
    106     public void onMultiWindowModeChanged(boolean isInMultiWindowMode) {
    107         super.onMultiWindowModeChanged(isInMultiWindowMode);
    108 
    109         Log.d(mLogTag, "onMultiWindowModeChanged: " + isInMultiWindowMode);
    110     }
    111 
    112     // Logging and UI methods below.
    113 
    114     /** Set up targets to receive log data */
    115     public void initializeLogging() {
    116         // Using Log, front-end to the logging chain, emulates android.util.log method signatures.
    117         // Wraps Android's native log framework
    118         LogWrapper logWrapper = new LogWrapper();
    119         Log.setLogNode(logWrapper);
    120 
    121         // Filter strips out everything except the message text.
    122         MessageOnlyLogFilter msgFilter = new MessageOnlyLogFilter();
    123         logWrapper.setNext(msgFilter);
    124 
    125         // On screen logging via a fragment with a TextView.
    126         LogFragment logFragment = (LogFragment) getSupportFragmentManager()
    127                 .findFragmentById(R.id.log_fragment);
    128         msgFilter.setNext(logFragment.getLogView());
    129     }
    130 
    131     public void stopLogging() {
    132         Log.setLogNode(null);
    133     }
    134 
    135     /**
    136      * Set the description text if a TextView with the id <code>description</code> is available.
    137      */
    138     protected void setDescription(@StringRes int textId) {
    139         // Set the text and background color
    140         TextView description = (TextView) findViewById(R.id.description);
    141         if (description != null) {
    142             description.setText(textId);
    143         }
    144     }
    145 
    146     /**
    147      * Set the background color for the description text.
    148      */
    149     protected void setBackgroundColor(@ColorRes int colorId) {
    150         View scrollView = findViewById(R.id.scrollview);
    151         if (scrollView != null) {
    152             scrollView.setBackgroundResource(colorId);
    153         }
    154     }
    155 
    156 }
    157