Android Contactpicker (select a contact person) detailed

Android api:http://developer.android.com/reference/android/content/intent.html

Contactpicker: A user can select a contact.

1. Create Contactpicker activities (activity)

Location: java->package-> Contactpicker.java

Package Mzx.spike.contactpicker.app;  
Import android.app.Activity;  
Import Android.content.ContentUris;  
Import android.content.Intent;  
Import Android.database.Cursor;  
Import Android.net.Uri;  
Import Android.os.Bundle;  
Import Android.provider.ContactsContract;  
Import Android.view.View;  
Import Android.widget.AdapterView;  
Import Android.widget.ListView;  
      
Import Android.widget.SimpleCursorAdapter; 
 /** * Created by C.l.wang on 14-3-20. */public class Contactpicker extends activity {@Override public void onCreate (Bundle savedinstancestate  
        ) {super.oncreate (savedinstancestate);  
      
        Setcontentview (R.layout.activity_main); Final Cursor C = getcontentresolver (). query (ContactsContract.Contacts.CONTENT_URI, NULL, NULL, NULL, NU  
      
        ll);  
        String[] from = new String[]{contactscontract.contacts.display_name_primary};  
   Int[] to = new Int[]{r.id.itemtextview};   
        Simplecursoradapter adapter = new Simplecursoradapter (this, r.layout.listitemlayout, C, from, to, 0);  
      
        ListView LV = (ListView) Findviewbyid (R.id.contactlistview);  
      
        Lv.setadapter (adapter); Lv.setonitemclicklistener (New Listview.onitemclicklistener () {public void Onitemclick (Adapterview<?> p  
                Arent, view view, int POS, long id) {c.movetoposition (POS);  
                int rowId = C.getint (C.getcolumnindexorthrow ("_id"));  
                Uri Outuri = Contenturis.withappendedid (ContactsContract.Contacts.CONTENT_URI, rowId);  
                Intent outdata = new Intent ();  
                Outdata.setdata (Outuri);  
                Setresult (ACTIVITY.RESULT_OK, outdata);  
            Finish ();  
    }  
        }); }  
}

Detailed

1. Create an activity to inherit activities, display Activity_main interface;

2. Create a cursor cursor traverse the contacts stored in the contact list;

3. Construct a simple Leng adapter (simplecursoradapter), note that this method is marked as abandonment, followed by the addition of parameter 0, version sdk11+;

4. Bind the adapter to ListView, Setadapter ();

5. Add Item click event (setonitemclicklistener), cursor transplant click Position, remove rowID, construct URI, bind URI to intent;

6. Return results, Setresult (), Result codes (ACTIVITY_RESULT_OK) and Intent;

2. Modify Activity_main.xml

Location: Res->layout->activity_main.xml

<relativelayout xmlns:android= "http://schemas.android.com/apk/res/android"
    android:layout_width= "Match_ Parent "
    android:layout_height=" match_parent "
    android:paddingleft=" @dimen/activity_horizontal_margin "
    android:paddingright= "@dimen/activity_horizontal_margin"
    android:paddingtop= "@dimen/activity_vertical _margin "
    android:paddingbottom=" @dimen/activity_vertical_margin "
>  
      
    <listview android:id=" @+id /contactlistview "
        android:layout_width=" match_parent "
        android:layout_height=" wrap_content "
     />"  
      
</RelativeLayout>

Add ListView, Contactpicker will call this layout (layout);

3. Create Listitemlayout.xml

Location: Res->layout->listitemlayout.xml

<?xml version= "1.0" encoding= "Utf-8"?> <linearlayout xmlns:android=  
      
"http://schemas.android.com/apk/" Res/android "
    android:orientation=" vertical "
    android:layout_width=" match_parent "
    android:layout_" height= "Match_parent"
    >  
      
    <textview
        android:id= "@+id/itemtextview"
        Match_parent "
        android:layout_height=" wrap_content "
        android:padding=" 10DP "
        android:textsize=" 16DP "
        android:textcolor=" #F0F "
     />  
      
</LinearLayout>

TextView displays each contact in the ListView, Contactpicker calls this layout (layout);

4. Create a test layout contactpickertester.xml

Location: Res->layout->contactpickertester.xml

<?xml version= "1.0" encoding= "Utf-8"?> <linearlayout xmlns:android=  
      
"http://schemas.android.com/apk/" Res/android "
    android:orientation=" vertical "
    android:layout_width=" match_parent "
    android:layout_" height= "Match_parent"
    >  
      
    <textview
        android:id= "@+id/selected_contact_textview"
        android: Layout_width= "Match_parent"
        android:layout_height= "wrap_content"
     />  
      
    <button
        android: Id= "@+id/pick_contact_button"
        android:layout_width= "match_parent"
        android:layout_height= "WRAP_" Content "
        android:text=" Pick contact "
     />  
      
</LinearLayout>

TextView displays selected contacts, button selection buttons, start interface;

See more highlights of this column: http://www.bianceng.cnhttp://www.bianceng.cn/OS/extra/