android自動提示

public class MainActivity extends Activity {

	private AutoCompleteTextView auto_in;
	private MultiAutoCompleteTextView multi_auto;
	
	private static final String[] autoStr = {
		"ab", "abc", "abcd", "abcde", "abcdef"
	};
	
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    
        auto_in = (AutoCompleteTextView)findViewById(R.id.auto_in);
        multi_auto = (MultiAutoCompleteTextView) findViewById(R.id.multi_auto);
        
        ArrayAdapter adapter = new ArrayAdapter<String>(this, 
        		android.R.layout.simple_dropdown_item_1line, autoStr);
        
        /**
         * Specifies the minimum number of characters the user has to type in the edit box 
         * before the drop down list is shown.
         * When threshold is less than or equals 0, a threshold of 1 is applied.
         */
        auto_in.setThreshold(3);
        auto_in.setAdapter(adapter);
        
    
        /**
         * MultiAutoCompleteTextView繼承於AutoCompleteTextView，可以在輸入框中一直增加新的選取值
         * 在進行setAdapter之後還需要調用setTokenizer（），否則會出現錯誤
         */
        multi_auto.setAdapter(adapter);
        /**
         * This simple Tokenizer can be used for lists 
         * where the items are separated by a comma and one or more spaces
         */
        multi_auto.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());
        
    }

}