Using ContentResolver : ContentResolver « Core Class « Android

1. Android
2. Core Class
3. ContentResolver

Using ContentResolver

   
/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package app.test;

import android.app.Activity;
import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.ContactsContract.Contacts;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AutoCompleteTextView;
import android.widget.CursorAdapter;
import android.widget.FilterQueryProvider;
import android.widget.Filterable;
import android.widget.TextView;

public class Test extends Activity {
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    ContentResolver content = getContentResolver();
    Cursor cursor = content.query(Contacts.CONTENT_URI,
        CONTACT_PROJECTION, null, null, null);
    ContactListAdapter adapter = new ContactListAdapter(
        this, cursor);

    AutoCompleteTextView textView = (AutoCompleteTextView) findViewById(R.id.edit);
    textView.setAdapter(adapter);
  }

  // XXX compiler bug in javac 1.5.0_07-164, we need to implement Filterable
  // to make compilation work
  public static class ContactListAdapter extends CursorAdapter implements
      Filterable {
    public ContactListAdapter(Context context, Cursor c) {
      super(context, c);
      mContent = context.getContentResolver();
    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {
      final LayoutInflater inflater = LayoutInflater.from(context);
      final TextView view = (TextView) inflater.inflate(
          android.R.layout.simple_dropdown_item_1line, parent, false);
      view.setText(cursor.getString(COLUMN_DISPLAY_NAME));
      return view;
    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {
      ((TextView) view).setText(cursor.getString(COLUMN_DISPLAY_NAME));
    }

    @Override
    public String convertToString(Cursor cursor) {
      return cursor.getString(COLUMN_DISPLAY_NAME);
    }

    @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 mContent.query(uri, CONTACT_PROJECTION, null, null, null);
    }

    private ContentResolver mContent;
  }

  public static final String[] CONTACT_PROJECTION = new String[] {
      Contacts._ID, Contacts.DISPLAY_NAME };

  private static final int COLUMN_DISPLAY_NAME = 1;
}

//main.xml
<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2007 The Android Open Source Project

     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at
  
          http://www.apache.org/licenses/LICENSE-2.0
  
     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
-->

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="autocomplete_5_instructions" />

    <LinearLayout
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="autocomplete_5_name" />

        <AutoCompleteTextView android:id="@+id/edit"
            android:completionThreshold="1"
            android:completionHint="autocomplete_5_hint"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>

    </LinearLayout>

</LinearLayout>

   
    
    
  

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