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      1 /*
      2  * Copyright (C) 2010 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.searchabledict;
     18 
     19 import android.app.Activity;
     20 import android.app.ActionBar;
     21 import android.app.SearchManager;
     22 import android.content.Context;
     23 import android.content.Intent;
     24 import android.database.Cursor;
     25 import android.net.Uri;
     26 import android.os.Build;
     27 import android.os.Bundle;
     28 import android.view.Menu;
     29 import android.view.MenuInflater;
     30 import android.view.MenuItem;
     31 import android.view.View;
     32 import android.widget.AdapterView;
     33 import android.widget.ListView;
     34 import android.widget.SearchView;
     35 import android.widget.SimpleCursorAdapter;
     36 import android.widget.TextView;
     37 import android.widget.AdapterView.OnItemClickListener;
     38 
     39 /**
     40  * The main activity for the dictionary.
     41  * Displays search results triggered by the search dialog and handles
     42  * actions from search suggestions.
     43  */
     44 public class SearchableDictionary extends Activity {
     45 
     46     private TextView mTextView;
     47     private ListView mListView;
     48 
     49     @Override
     50     public void onCreate(Bundle savedInstanceState) {
     51         super.onCreate(savedInstanceState);
     52         setContentView(R.layout.main);
     53 
     54         mTextView = (TextView) findViewById(R.id.text);
     55         mListView = (ListView) findViewById(R.id.list);
     56 
     57         handleIntent(getIntent());
     58     }
     59 
     60     @Override
     61     protected void onNewIntent(Intent intent) {
     62         // Because this activity has set launchMode="singleTop", the system calls this method
     63         // to deliver the intent if this activity is currently the foreground activity when
     64         // invoked again (when the user executes a search from this activity, we don't create
     65         // a new instance of this activity, so the system delivers the search intent here)
     66         handleIntent(intent);
     67     }
     68 
     69     private void handleIntent(Intent intent) {
     70         if (Intent.ACTION_VIEW.equals(intent.getAction())) {
     71             // handles a click on a search suggestion; launches activity to show word
     72             Intent wordIntent = new Intent(this, WordActivity.class);
     73             wordIntent.setData(intent.getData());
     74             startActivity(wordIntent);
     75         } else if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
     76             // handles a search query
     77             String query = intent.getStringExtra(SearchManager.QUERY);
     78             showResults(query);
     79         }
     80     }
     81 
     82     /**
     83      * Searches the dictionary and displays results for the given query.
     84      * @param query The search query
     85      */
     86     private void showResults(String query) {
     87 
     88         Cursor cursor = managedQuery(DictionaryProvider.CONTENT_URI, null, null,
     89                                 new String[] {query}, null);
     90 
     91         if (cursor == null) {
     92             // There are no results
     93             mTextView.setText(getString(R.string.no_results, new Object[] {query}));
     94         } else {
     95             // Display the number of results
     96             int count = cursor.getCount();
     97             String countString = getResources().getQuantityString(R.plurals.search_results,
     98                                     count, new Object[] {count, query});
     99             mTextView.setText(countString);
    100 
    101             // Specify the columns we want to display in the result
    102             String[] from = new String[] { DictionaryDatabase.KEY_WORD,
    103                                            DictionaryDatabase.KEY_DEFINITION };
    104 
    105             // Specify the corresponding layout elements where we want the columns to go
    106             int[] to = new int[] { R.id.word,
    107                                    R.id.definition };
    108 
    109             // Create a simple cursor adapter for the definitions and apply them to the ListView
    110             SimpleCursorAdapter words = new SimpleCursorAdapter(this,
    111                                           R.layout.result, cursor, from, to);
    112             mListView.setAdapter(words);
    113 
    114             // Define the on-click listener for the list items
    115             mListView.setOnItemClickListener(new OnItemClickListener() {
    116 
    117                 @Override
    118                 public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    119                     // Build the Intent used to open WordActivity with a specific word Uri
    120                     Intent wordIntent = new Intent(getApplicationContext(), WordActivity.class);
    121                     Uri data = Uri.withAppendedPath(DictionaryProvider.CONTENT_URI,
    122                                                     String.valueOf(id));
    123                     wordIntent.setData(data);
    124                     startActivity(wordIntent);
    125                 }
    126             });
    127         }
    128     }
    129 
    130     @Override
    131     public boolean onCreateOptionsMenu(Menu menu) {
    132         MenuInflater inflater = getMenuInflater();
    133         inflater.inflate(R.menu.options_menu, menu);
    134 
    135         if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB){
    136             SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
    137             SearchView searchView = (SearchView) menu.findItem(R.id.search).getActionView();
    138             searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));
    139             searchView.setIconifiedByDefault(false);
    140         }
    141 
    142         return true;
    143     }
    144 
    145     @Override
    146     public boolean onOptionsItemSelected(MenuItem item) {
    147         switch (item.getItemId()) {
    148             case R.id.search:
    149                 onSearchRequested();
    150                 return true;
    151             default:
    152                 return false;
    153         }
    154     }
    155 }
    156