Android开发笔记-EditText自动补全功能

项目开发之需要, 根据用户拼音或代码检索出用户信息. 现在有两种方法可以实现.

1. 使用android系统自带组件: AutoCompleteTextView .

效果图如下:

布局文件:

auto_textview.xml

 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >

	 <TextView android:id="@+id/selection6"
	    android:layout_width="fill_parent"
	    android:layout_height="wrap_content"   /> 
  	 <AutoCompleteTextView android:id="@+id/editAuto"
	    android:layout_width="fill_parent"
	    android:layout_height="wrap_content"
	    android:completionThreshold ="1" />

</LinearLayout>

 

 

 2. java代码:

public class AutoComplementTest extends Activity {

    private AutoCompleteTextView edit;
    private String[]  items={"lorem", "ipsum", "dolor", "sit", "amet", "consectetuer", "adipiscing", "elit", "morbi", "vel", "ligula", "vitae", "arcu", "aliquet", "mollis", "etiam", "vel", "erat", "placerat", "ante", "porttitor", "sodales", "pellentesque", "augue", "purus"}; 
    
    
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		
		super.onCreate(savedInstanceState);
		
		setContentView(R.layout.auto_textview);
        edit = (AutoCompleteTextView)findViewById(R.id .editAuto);
        //步骤1：设置适配器 
        edit.setAdapter (new ArrayAdapter<String>(this ,android.R.layout.simple_dropdown_item_1line ,items ));
      
	} 

}

 

此法的弊端: 不能根据字母拼音或代码检索, 只能根据返回的值自动补全, 拓展性不全.

 

 

方法二:

EditText和ListView组合成类似自动补全功能.

 

效果图如下:

 

 

布局文件代码:

<EditText android:id="@+id/edit_key"
						    android:layout_width="fill_parent"
						    android:layout_height="32dip"
						    android:layout_marginLeft="2dip"
						    android:layout_marginTop="4dip"
						    android:layout_marginBottom="4dip"
						    android:paddingTop="8dip"
						    android:paddingBottom="4dip"
						    android:focusable="false"
						    android:layout_marginRight="12dip"
						    android:background="@drawable/qt_search_txt"
						    />
					  
						
						<ListView android:id="@+id/lstv_all" 
						 	android:layout_width="fill_parent"
						    android:layout_height="wrap_content" />

 

java代码:

public class LoadableStockListActivity extends ListActivity{
 
	private StringBuffer sb = new StringBuffer(); 
		
	private EditText txtKey;
	private ListView listView;
	
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
		setContentView(R.layout.loadable_stock_list_activity);
		
		 
		foursquared = ((Foursquared)this.getApplication());
		 
		mEmptyProgress = (ProgressBar) findViewById(R.id.emptyProgress);
		mEmptyText = (TextView) findViewById(R.id.emptyText);
		setLoadingView(); 
		
		 
		txtKey = (EditText)findViewById(R.id.edit_key); 
				 
		listView = (ListView)findViewById(R.id.lstv_all);
		//添加文本改变事件
		txtKey.addTextChangedListener(new TextWatcher() {
			@Override
			public void onTextChanged(CharSequence s, int start, int before, int count) {
				
				key =  txtKey.getText().toString();
				if(key!=null && !"".equals(key.trim())){
					Log.i(TAG , " key:"+key);
					List<Map<String , String>> lst = foursquared.getSelectStock(key);//根据关键字查询股票代码
					StockListAdapter stockAdapter = new StockListAdapter(LoadableStockListActivity.this , lst);
					listView.setAdapter(stockAdapter);
				}else{
					listView.setAdapter(null);
				}
			}
			
			@Override
			public void beforeTextChanged(CharSequence s, int start, int count,
					int after) {
			}
			
			@Override
			public void afterTextChanged(Editable s) {
				
			}
		});
		
		//查询所有股票相关数据
		List<Map<String , String>> lst = foursquared.getSelectStock(null);
		//自定义ListView适配器
        StockListAdapter stockAdapter = new StockListAdapter(this , lst);
        //设置适配器
        listView.setAdapter(stockAdapter);
}

 

  getSelectStock()方法详解:

/**
	 * 获取股票代码信息列表
	 * @return
	 */
	public List<Map<String , String>> getSelectStock(String key){
		
		stockDB.open();
		List<Map<String , String>> stocks = stockDB.selectStock(key);
		stockDB.close();
		
		return stocks;
		
	}


selectStock()方法详解:(欲了解stockDB具体代码,请参考: 上篇:android开发笔记-sqllite操作)

public List<Map<String , String>> selectStock(String key){
		
		if(!db.isOpen()){
			db = dbHelper.getReadableDatabase();
		}
		
		List<Map<String , String>> stockList = new ArrayList<Map<String , String>>();
		
		Cursor cur = null;
		
		if(null!=key && !"".equals(key)){

			//查询的列字段名
			String [] columns = {CODE , NAME , SIMPLE};
			//查询条件
			String where =  CODE+ " like ? or "+NAME+" like ? or "+SIMPLE+" like ? ";
			//查询参数
			String [] selectArgs = {key+"%" , key+"%" , key+"%"}; 
			//执行查询
			cur = db.query(DATABASE_TABLE, columns, where , selectArgs, null, null, null);
			
			cur.moveToFirst();
			//循环读取数据
			while(!cur.isAfterLast()){
				Map<String , String> stockMap = new HashMap<String , String>();
				String code =  cur.getString(0);
				String name =  cur.getString(1)+"("+code+")";
				stockMap.put("code" , code);
				stockMap.put("name" , name);
				stockList.add(stockMap);
				cur.moveToNext();
			}
			cur.close();
			close();
			return stockList;
		}
		return null;
	}

 

  此方法能够根据股票代码, 拼音字母检索股票信息

评论

1 楼 wangshunfan 2013-03-06  

跟着思路走，可以写出来！非常感谢！