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      1 page.title=Remaining Backward Compatible
      2 trainingnavtop=true
      3 previous.title=Storing and Searching for Data
      4 previous.link=search.html
      5 
      6 @jd:body
      7 
      8   <div id="tb-wrapper">
      9     <div id="tb">
     10       <h2>This lesson teaches you to</h2>
     11 
     12       <ul>
     13         <li><a href="{@docRoot}training/search/backward-compat.html#set-sdk">Set Minimum
     14         and Target API levels</a></li>
     15 
     16         <li><a href="{@docRoot}training/search/backward-compat.html#provide-sd">Provide the Search
     17         Dialog for Older Devices</a></li>
     18 
     19         <li><a href="{@docRoot}training/search/backward-compat.html#check-ver">Check the Android Build
     20         Version at Runtime</a></li>
     21       </ul>
     22     </div>
     23   </div>
     24 
     25   <p>The {@link android.widget.SearchView} and action bar are only available on Android 3.0 and
     26   later. To support older platforms, you can fall back to the search dialog. The search dialog is a
     27   system provided UI that overlays on top of your application when invoked.</p>
     28 
     29   <h2 id="set-sdk">Set Minimum and Target API levels</h2>
     30 
     31   <p>To setup the search dialog, first declare in your manifest that you want to support older
     32   devices, but want to target Android 3.0 or later versions. When you do this, your application
     33   automatically uses the action bar on Android 3.0 or later and uses the traditional menu system on
     34   older devices:</p>
     35   <pre>
     36 &lt;uses-sdk android:minSdkVersion="7" android:targetSdkVersion="15" /&gt;
     37 
     38 &lt;application&gt;
     39 ...
     40 </pre>
     41 
     42   <h2 id="provide-sd">Provide the Search Dialog for Older Devices</h2>
     43 
     44   <p>To invoke the search dialog on older devices, call {@link
     45   android.app.Activity#onSearchRequested onSearchRequested()} whenever a user selects the search
     46   menu item from the options menu. Because Android 3.0 and higher devices show the
     47   {@link android.widget.SearchView} in the action bar (as demonstrated in the first lesson), only versions
     48   older than 3.0 call {@link android.app.Activity#onOptionsItemSelected onOptionsItemSelected()} when the
     49   user selects the search menu item.
     50   </p>
     51   <pre>
     52 &#64;Override
     53 public boolean onOptionsItemSelected(MenuItem item) {
     54     switch (item.getItemId()) {
     55         case R.id.search:
     56             onSearchRequested();
     57             return true;
     58         default:
     59             return false;
     60     }
     61 }
     62 </pre>
     63 
     64   <h2 id="check-ver">Check the Android Build Version at Runtime</h2>
     65 
     66   <p>At runtime, check the device version to make sure an unsupported use of {@link
     67   android.widget.SearchView} does not occur on older devices. In our example code, this happens in
     68   the {@link android.app.Activity#onCreateOptionsMenu onCreateOptionsMenu()} method:</p>
     69   <pre>
     70 &#64;Override
     71 public boolean onCreateOptionsMenu(Menu menu) {
     72 
     73     MenuInflater inflater = getMenuInflater();
     74     inflater.inflate(R.menu.options_menu, menu);
     75 
     76     if (Build.VERSION.SDK_INT &gt;= Build.VERSION_CODES.HONEYCOMB) {
     77         SearchManager searchManager =
     78                 (SearchManager) getSystemService(Context.SEARCH_SERVICE);
     79         SearchView searchView =
     80                 (SearchView) menu.findItem(R.id.search).getActionView();
     81         searchView.setSearchableInfo(
     82                 searchManager.getSearchableInfo(getComponentName()));
     83         searchView.setIconifiedByDefault(false);
     84     }
     85     return true;
     86 }
     87 </pre>
     88