本文实例讲述了Android使用ContentResolver搜索手机通讯录的方法。分享给大家供大家参考,具体如下:
在这个程序中使用ContentResolver来访问通讯录里联系人的关键字,并将所有找到的联系人存入CursorAdapter里。输入搜索人员名字a ,会将所有以a开头的名字都显示出来,输入*,则所有通讯录中的人名显示于AutoCompleteView的AdapterView里,若发生了User选择事件后,会将勾选的联系人电话号码显示于TextView里。
此程序中用到了ContentResolver .query(Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder)来取出通讯录里的所有联系人;其中将selection及selectionArgs传入null代表将所有联系人找出来。用Cursor 的getString(column index)的方式来取得存储内容,其中column index从0开始,这一点与java.sql.ResultSet不同,因为它是从1开始的。用AutoCompleteTextView.OnItemClickListener事件,这也是当用户单击联系人之后所拦截的事件处理,在其中便以ContactsAdapter.getCursor()方法取得联系人的电话号码。
程序如下:
import android.app.Activity; import android.content.ContentResolver; import android.database.Cursor; import android.os.Bundle; import android.provider.Contacts; import android.view.View; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.AutoCompleteTextView; import android.widget.TextView; @SuppressWarnings("deprecation") public class A07Activity extends Activity { private AutoCompleteTextView actv; private TextView tv; private Cursor c01; private ContactsAdapter ca; //找出通讯录中的字段 public static String[] people={ Contacts.People._ID, Contacts.People.PRIMARY_PHONE_ID, Contacts.People.TYPE, Contacts.People.NUMBER, Contacts.People.LABEL, Contacts.People.NAME }; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); actv=(AutoCompleteTextView)findViewById(R.id.actv); tv=(TextView)findViewById(R.id.tv); ContentResolver cr=getContentResolver(); c01=cr.query(Contacts.People.CONTENT_URI, people, null, null, Contacts.People.DEFAULT_SORT_ORDER); ca=new ContactsAdapter(this,c01); actv.setAdapter(ca); actv.setOnItemClickListener(new OnItemClickListener(){ @Override public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { // TODO Auto-generated method stub Cursor c02=ca.getCursor(); c02.moveToPosition(arg2); String number=c02.getString(c02.getColumnIndexOrThrow(Contacts.People.NUMBER)); number=number==null?"无电话输入": number; tv.setText(c02.getString(c02.getColumnIndexOrThrow(Contacts.People.NAME))+"的电话是:"+number); } }); } }
import android.content.ContentResolver; import android.content.Context; import android.database.Cursor; import android.provider.Contacts; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.CursorAdapter; import android.widget.TextView; @SuppressWarnings("deprecation") public class ContactsAdapter extends CursorAdapter{ ContentResolver cr; public ContactsAdapter(Context context, Cursor c) { super(context, c); // TODO Auto-generated constructor stub cr=context.getContentResolver(); } @Override public void bindView(View view, Context context, Cursor cursor) { // TODO Auto-generated method stub ((TextView)view).setText(cursor.getString(cursor.getColumnIndexOrThrow(Contacts.People.NAME))); } @Override public View newView(Context context, Cursor cursor, ViewGroup parent) { // TODO Auto-generated method stub final LayoutInflater li=LayoutInflater.from(context); final TextView tv=(TextView)li.inflate(android.R.layout.simple_dropdown_item_1line, parent, false); tv.setText(cursor.getString(cursor.getColumnIndexOrThrow(Contacts.People.NAME))); return tv; } public String converToString(Cursor c){ return c.getString(c.getColumnIndexOrThrow(Contacts.People.NAME)); } @SuppressWarnings("null") public Cursor runQueryOnBackgroundThread(CharSequence cs){ if(getFilterQueryProvider()!=null){ getFilterQueryProvider().runQuery(cs); } StringBuilder sb=null; String[] s=null; if(cs==null){ sb=new StringBuilder(); sb.append("UPPER("); sb.append(Contacts.ContactMethods.NAME); sb.append(")GLOB?"); s=new String[]{cs.toString().toUpperCase()+"*"}; } return cr.query( Contacts.People.CONTENT_URI, A07Activity.people, sb==null? null:sb.toString(), s, Contacts.People.DEFAULT_SORT_ORDER ); } }
AndroidManifest.xml如下所示:
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.my.a07" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="10" /> <application android:icon="@drawable/ic_launcher" android:label="@string/app_name" > <activity android:name=".A07Activity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> <uses-permission android:name="android.permission.READ_CONTACTS"></uses-permission> </manifest>
通过ContentResolver还可以添加、修改、删除通讯录中的信息;并且通过它还可以访问audio、video、images等数据。相应方法展示如下:
添加:public final Uri insert(Uri uri,ContentValues values),ContentValue.put(key,value) ,其中key为字段名称,value为添加的数据。
修改:public final int update(Uri uri,ContentValues values,String where ,String[] selectionArgs),其中where为sql where 后面的条件字符串。selectionArgs为where里的数据。
删除:public final int delete(Uri uri,String where,String[] selectionArgs).
下面再使用ContentValue.put()方法。通过程序添加通讯录里的联系人的资料。
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希望本文所述对大家Android程序设计有所帮助。