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package cc.testautocompletetextview2;import android.os.Bundle;import android.app.Activity;/** * Demo描述 * 利用自定义AutoCompleteTextView完成邮箱自动补全功能 *  * 参考资料: * 1 http://blog.csdn.net/fx_sky/article/details/9326129 * 2 http://blog.csdn.net/jwzhangjie/article/details/15771953 * 3 http://my.eoe.cn/eoe_haozi/archive/519.html * 4 http://gundumw100.iteye.com/blog/1056728 *   Thank you very much */public class MainActivity extends Activity {	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.main);	}}

AutoCompleteTextViewSubClass如下:

package cc.testautocompletetextview2;import java.util.ArrayList;import java.util.List;import android.content.Context;import android.graphics.Color;import android.text.Editable;import android.text.TextWatcher;import android.util.AttributeSet;import android.view.View;import android.view.ViewGroup;import android.widget.AutoCompleteTextView;import android.widget.BaseAdapter;import android.widget.Filter;import android.widget.Filterable;import android.widget.TextView;public class AutoCompleteTextViewSubClass extends AutoCompleteTextView {	//可补全的邮箱后缀	private static final String[] emailSuffix = { "@qq.com","@gmail.com", "@sina.com","@sohu.com"};	public AutoCompleteTextViewSubClass(Context context){		super(context);		init(context);	}	public AutoCompleteTextViewSubClass(Context context, AttributeSet attrs) {		super(context, attrs);		init(context);	}		private void init(Context context){		final AutoCompleteTextViewAdatper adapter = new AutoCompleteTextViewAdatper(context);		setAdapter(adapter);		//设置阈值		//等同于布局文件中的 android:completionThreshold="2"		//setThreshold(2);		addTextChangedListener(new TextWatcher() {			@Override			public void afterTextChanged(Editable editable) {				String inputString = editable.toString();				System.out.println("--->输入的内容 inputString="+inputString);				adapter.mList.clear();				if (inputString.length() > 0) {					for (int i = 0; i < emailSuffix.length; ++i) {						adapter.mList.add(inputString + emailSuffix[i]);					}				}				adapter.notifyDataSetChanged();				showDropDown();			}			@Override			public void beforeTextChanged(CharSequence s, int start, int count,int after) {							}			@Override			public void onTextChanged(CharSequence s, int start, int before,int count) {			}		});	}				//定义AutoCompleteTextView的Adapter继承自BaseAdapter且实现Filterable接口	class AutoCompleteTextViewAdatper extends BaseAdapter implements Filterable {		List
   
     mList;		private Context mContext;		private FilterSubClass mFilter;		public AutoCompleteTextViewAdatper(Context context) {			mContext = context;			mList = new ArrayList
    
     ();		}		@Override		public int getCount() {			return mList == null ? 0 : mList.size();		}		@Override		public Object getItem(int position) {			return mList == null ? null : mList.get(position);		}		@Override		public long getItemId(int position) {			return position;		}		@Override		public View getView(int position, View convertView, ViewGroup parent) {			if (convertView == null) {				TextView textView = new TextView(mContext);				textView.setTextColor(Color.RED);				textView.setTextSize(30);				convertView = textView;			}			TextView textView = (TextView) convertView;			textView.setText(mList.get(position));			return textView;		}		@Override		public Filter getFilter() {			if (mFilter == null) {				mFilter = new FilterSubClass();			}			return mFilter;		}		// 只有满足setThreshold(2)这个阈值时才会执行performFiltering()		private class FilterSubClass extends Filter {			@Override			protected FilterResults performFiltering(CharSequence constraint) {				System.out.println("--->过滤 constraint=" + constraint.toString());				FilterResults results = new FilterResults();				if (mList == null) {					mList = new ArrayList
     
      ();				}				results.values = mList;				results.count = mList.size();				return results;			}			@Override			protected void publishResults(CharSequence constraint,					FilterResults results) {				if (results.count > 0) {					notifyDataSetChanged();				} else {					notifyDataSetInvalidated();				}			}		}	}}
     
    
   

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