AutoCompleteTextView自动提示联系人信息

效果图:



布局文件中定义:

AutoCompleteTextView其实就是EditText的一个子类其中封装了一个ListView,所以在布局文件中很EditText的定义很类似:

[code]<AutoCompleteTextView
        android:layout_height="wrap_content"
        android:layout_width="0dp"
        android:layout_weight="2"
        android:id="@+id/actv"
        android:textColor="@android:color/black"
        android:completionThreshold="1"
        android:background="@drawable/edittext"
        >
</AutoCompleteTextView>

备注: android:completionThreshold=”1” 当弹出建议框的时候，输入中输入的字符的个数 .默认是2,即输入了两个字符之后才提示。

由于AutoCompleteTextView中封装了一个ListView，所以我们依然需要一个Adapter:

[code]class MyAdapter extends CursorAdapter{

        public MyAdapter(Context context, Cursor c) {
            super(context, c);
        }

        @Override
        public View newView(Context context, Cursor cursor, ViewGroup parent) {
            View view = View.inflate(context,R.layout.item_newmessgae,null);
            return view;
        }

        @Override
        public void bindView(View view, Context context, Cursor cursor) {
          TextView tv_name_actv = (TextView) view.findViewById(R.id.tv_name_actv);
          TextView tv_number_actv = (TextView) view.findViewById(R.id.tv_number_actv);
            tv_name_actv.setText(cursor.getString(cursor.getColumnIndex("display_name")));
            tv_number_actv.setText(cursor.getString(cursor.getColumnIndex("data1")));
        }
        /**
         * 该方法在点击AutoCompleteTextView中弹出的listView时，将返回值设置给 activity
         */
        public CharSequence convertToString(Cursor cursor) {
            return cursor.getString(1)+"<"+cursor.getString(2)+">";
        }
   }

具体的设置:

[code] //AutoCompleteTextView的设置
        MyAdapter myAdapter = new MyAdapter(this,null);
        //此回调返回一个cursor，然后把次cursor设置给CursorAdapter
        autoCompleteTextView.setAdapter(myAdapter);
        myAdapter.setFilterQueryProvider(new FilterQueryProvider() {
            @Override
            public Cursor runQuery(CharSequence charSequence) {
                Cursor cursor = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, new String[]{"_id","data1","display_name"}, "data1 like '%"+charSequence+"%'", null, null);
                return cursor;
            }
        });

代码相对简单，按如上的操作即可完成，至于其中Adapter要设置的item_view相对简单，此处不再给出。