自动补全联系人姓名

布满荆棘的人生 2022-08-19 13:19 149阅读 0赞

1、布局文件

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical" >
    
        <TextView
            android:id="@+id/title"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:text="自动补全联系人姓名"
            android:textColor="@android:color/black"
            android:textSize="30dp" />
    
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >
    
            <TextView
                android:id="@+id/textView"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="5dp"
                android:text="姓名："
                android:textColor="@android:color/black"
                android:textSize="25dp" />
    
            <AutoCompleteTextView
                android:id="@+id/edit"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:completionThreshold="1"
                android:textColor="@android:color/black" >
    
                <requestFocus />
            </AutoCompleteTextView>
        </LinearLayout>
    
    </LinearLayout>

2、创建ContactListAdapter类，继承CursorAdapter类并实现Filterable接口

public class ContactListAdapter extends CursorAdapter implements Filterable {
    
        private ContentResolver resolver;
        private  String[] columns = new String[] { Contacts._ID, Contacts.DISPLAY_NAME };
        public ContactListAdapter(Context context, Cursor c) {
            super(context, c);//调用父类构造方法
            resolver = context.getContentResolver();//初始化ContentResolver
        }
    
        @Override
        public void bindView(View arg0, Context arg1, Cursor arg2) {
            ((TextView) arg0).setText(arg2.getString(1));
        }
    
        @Override
        public View newView(Context context, Cursor cursor, ViewGroup parent) {
            LayoutInflater inflater = LayoutInflater.from(context);
            TextView view = (TextView) inflater.inflate(android.R.layout.simple_dropdown_item_1line, parent, false);
            view.setText(cursor.getString(1));
            return view;
        }
    
        @Override
        public CharSequence convertToString(Cursor cursor) {
            return cursor.getString(1);
        }
    
        @Override
        public Cursor runQueryOnBackgroundThread(CharSequence constraint) {
            FilterQueryProvider filter = getFilterQueryProvider();
            if (filter != null) {
                return filter.runQuery(constraint);
            }
    
            Uri uri = Uri.withAppendedPath(Contacts.CONTENT_FILTER_URI, Uri.encode(constraint.toString()));
            return resolver.query(uri, columns, null, null, null);
        }
    }

3、MainActivity

public class MainActivity extends Activity {
    	private String[] columns = new String[]{Contacts._ID,Contacts.DISPLAY_NAME};
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            ContentResolver resolver = getContentResolver();
            Cursor cursor = resolver.query(Contacts.CONTENT_URI, columns, null, null, null);
            ContactListAdapter adapter = new ContactListAdapter(this, cursor);
            AutoCompleteTextView textView = (AutoCompleteTextView)findViewById(R.id.edit);
            textView.setAdapter(adapter);
        }
    }

4、AndroidManifest天假读取联系人记录的权限

<uses-permission android:name="android.permission.READ_CONTACTS"/>

![Center][]

[Center]: /images/20220731/0a5db3f44750499e905f3e1892ab2889.png