个人练习：查看，获取联系人电话

1.main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <EditText 
        android:id="@+id/show"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:editable="false"
        android:cursorVisible="false"
        />
    <EditText 
        android:id="@+id/phone"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:editable="false"
        android:cursorVisible="false"
        />
    <Button
        android:id="@+id/btnClick"  
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:text="查看联系人"
        />
</LinearLayout>

2.MainActivity.java

public class MainActivity extends Activity
{

    protected static final String TAG = "Click.Button";
    protected static final int PICK_CONTACT = 0;
    private Button btnClic = null;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        btnClic = (Button) findViewById(R.id.btnClick);
        btnClic.setOnClickListener(new View.OnClickListener()
        {

            @Override
            public void onClick(View v)
            {
                // TODO Auto-generated method stub
                Intent intent = new Intent();
                intent.setAction(Intent.ACTION_GET_CONTENT);
                intent.setType("vnd.android.cursor.item/phone");
                startActivityForResult(intent, PICK_CONTACT);
            }
        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data)
    {
        // TODO Auto-generated method stub
        super.onActivityResult(requestCode, resultCode, data);
        switch (requestCode)
        {
        case PICK_CONTACT:
            if (resultCode == Activity.RESULT_OK)
            {
                // 获取返回的数据
                Uri contactData = data.getData();
                // 查询联系人信息
                Cursor cursor = managedQuery(contactData, null, null, null,
                        null);
                // 如果查询到指定的联系人
                if (cursor.moveToFirst())
                {
                    String contactID = cursor.getString(cursor
                            .getColumnIndex(ContactsContract.Contacts._ID));
                    // 获取联系人的姓名
                    // String name =
                    // cursor.getString(cursor.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
                    String name = cursor
                            .getString(cursor
                                    .getColumnIndexOrThrow(ContactsContract.Contacts.DISPLAY_NAME));
                    String phoneNumber = "此联系人未输入电话号码";
                    // 根据联系人查询该联系人的详细信息
                    Cursor phones = getContentResolver().query(
                            ContactsContract.CommonDataKinds.Phone.CONTENT_URI,
                            null,
                            ContactsContract.CommonDataKinds.Phone.CONTACT_ID
                                    + "=" + contactID, null, null);
                    // 取出第一行
                    if (phones.moveToFirst())
                    {
                        phoneNumber = phones
                                .getString(phones
                                        .getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));                        
                    }
                    //关闭游标
                    phones.close();
                    EditText show = (EditText)findViewById(R.id.show);
                    show.setText(name);
                    EditText phone = (EditText)findViewById(R.id.phone);
                    phone.setText(phoneNumber);
                }
                cursor.close();
            }
            break;
        }

    }
}

3.manifest.xml文件中添加此节点

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