Home | History | Annotate | Download | only in activity-lifecycle 
      1 page.title=   
      2 page.tags=  
      3 helpoutsWidget=true
      4 
      5 trainingnavtop=true
      6 
      7 @jd:body
      8 
      9 <div id="tb-wrapper">
     10   <div id="tb">
     11     
     12     <h2>  </h2>
     13     <ol>
     14       <li><a href="#Pause"> </a></li>
     15       <li><a href="#Resume"> </a></li>
     16     </ol>
     17     
     18     <h2>. :</h2>
     19     <ul>
     20       <li><a href="{@docRoot}guide/components/activities.html"></a>
     21       </li>
     22     </ul>
     23 
     24 <h2> </h2>
     25 
     26 <div class="download-box">
     27  <a href="http://developer.android.com/shareables/training/ActivityLifecycle.zip" class="button"> </a>
     28  <p class="filename">ActivityLifecycle.zip</p>
     29 </div>
     30 
     31   </div>
     32 </div>
     33 
     34 <p>          
     35  ,     <em></em>.  ,   
     36  (  )   . 
     37    ,     ,    .</p>
     38 
     39 <p>       ,  <em></em> (   
     40   ).</p>
     41 
     42 <p>  ,    {@link
     43 android.app.Activity#onPause onPause()}  {@link android.app.Activity},  
     44   ,        (  ),  
     45  ,          . 
     46      ,      
     47 {@link android.app.Activity#onResume onResume()}.</p>
     48 
     49 <p class="note"><strong>.</strong>     {@link
     50 android.app.Activity#onPause()},   ,      
     51      .      
     52    .</p>
     53 
     54 <img src="{@docRoot}images/training/basics/basic-lifecycle-paused.png" />
     55 <p class="img-caption"><strong> 1</strong>.    
     56  ,   {@link android.app.Activity#onPause onPause()}  
     57     (1).     ,    ,
     58   {@link android.app.Activity#onResume onResume()} (2).</p>
     59 
     60 
     61 <h2 id="Pause"> </h2>
     62       
     63 <p>   {@link android.app.Activity#onPause()}  , 
     64  ,     .     , 
     65   ,       .   
     66  {@link android.app.Activity#onPause()}      :</p>
     67 
     68 <ul>
     69   <li>     ,     .</li>
     70   <li>  ,      
     71   (   ).</li>
     72   <li>  ,  ,   (
     73 GPS)   ,          
     74  .</li>
     75 </ul>
     76 
     77 <p>,     {@link android.hardware.Camera}, 
     78 {@link android.app.Activity#onPause()}    .</p>
     79 
     80 <pre>
     81 &#64;Override
     82 public void onPause() {
     83     super.onPause();  // Always call the superclass method first
     84 
     85     // Release the Camera because we don't need it when paused
     86     // and other activities might need to use it.
     87     if (mCamera != null) {
     88         mCamera.release()
     89         mCamera = null;
     90     }
     91 }
     92 </pre>
     93 
     94 <p> <strong></strong>   {@link android.app.Activity#onPause()}  
     95   (     )   . 
     96       {@link android.app.Activity#onPause()}
     97    ,       (     ).
     98    {@link
     99 android.app.Activity#onPause()}        ,      ,     
    100     (          
    101 {@link android.app.Activity#onStop onStop()}).</p>
    102 
    103 <p> ,     {@link android.app.Activity#onPause
    104 onPause()},     ,       
    105      .</p>
    106 
    107 <p class="note"><strong>.</strong>     {@link
    108 android.app.Activity}         .
    109     ,          
    110 .</p>
    111 
    112 
    113 
    114 <h2 id="Resume"> </h2>
    115 
    116 <p>     ,    {@link
    117 android.app.Activity#onResume()}.</p>
    118 
    119 <p>,       ,      ,
    120        .    ,    {@link
    121 android.app.Activity#onResume()}   ,    {@link
    122 android.app.Activity#onPause()},     ,        
    123 (      ,  
    124        ).</p>
    125 
    126 <p>  {@link android.app.Activity#onResume()} 
    127  {@link android.app.Activity#onPause()} .    ,
    128      .</p>
    129 
    130 <pre>
    131 &#64;Override
    132 public void onResume() {
    133     super.onResume();  // Always call the superclass method first
    134 
    135     // Get the Camera instance as the activity achieves full user focus
    136     if (mCamera == null) {
    137         initializeCamera(); // Local method to handle camera init
    138     }
    139 }
    140 </pre>
    141 
    142 
    143 
    144 
    145 
    146 
    147 
    148