Question

我想从联系人列表中选择联系人，并提取联系人姓名以在我的编辑文本中显示。 xml文件的代码如下：

activity_main.xml中

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >

<EditText
    android:id="@+id/display_name"
    android:inputType="textPersonName"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="78dp"
    android:ems="10" >

    <requestFocus />
</EditText>

<Button
    android:id="@+id/do_name_picker"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true"
    android:onClick="doLaunchContactPicker"
    android:text="Button" />

MainActivity java文件的代码如下：

public class MainActivity extends Activity {

EditText e;
private static final int CONTACT_PICKER_RESULT = 1;
private static final String DEBUG_TAG = null;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

   }



public void doLaunchContactPicker(View view) {
    Intent contactPickerIntent = new Intent(Intent.ACTION_PICK,
            Contacts.CONTENT_URI);
    startActivityForResult(contactPickerIntent, CONTACT_PICKER_RESULT);
}


@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK) {
        switch (requestCode) {
        case CONTACT_PICKER_RESULT:
            Cursor cursor = null;
            String name = "";
            try {
                Uri result = data.getData();
                Log.v(DEBUG_TAG, "Got a contact result: "
                        + result.toString());

                // get the contact id from the Uri
                String id = result.getLastPathSegment();

                // query for name
                cursor = getContentResolver().query(Phone.CONTENT_URI,
                        null, Phone.CONTACT_ID + "=?", new String[] { id },
                        null);

                int phoneIdx = cursor.getColumnIndex(Phone.DATA);

                } catch (Exception e) {
                Log.e(DEBUG_TAG, "Failed to get name", e);
            } finally {
                if (cursor != null) {
                    cursor.close();
                }
                e = (EditText) findViewById(R.id.display_name);
                e.setText(name);
                if (name.length() == 0) {
                    Toast.makeText(this, "Name not found for contact.",
                            Toast.LENGTH_LONG).show();
                }

            }

            break;
        }

    } else {
        Log.w(DEBUG_TAG, "Warning: activity result not ok");
    }
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}
}

导入声明是：

import android.provider.ContactsContract.Contacts;
import android.provider.ContactsContract.CommonDataKinds.Phone;

我还在清单文件中添加了“读取联系人”权限。

我可以从联系人列表中选择一个联系人，但名称没有出现在编辑文本中，而是我收到toast消息“找不到联系人姓名”。提取电子邮件时也会出现同样的问题。请帮我。提前谢谢。

Answer 1

您没有为name变量设置值。您只是用空字符串初始化它。

删除行int phoneIdx = cursor.getColumnIndex(Phone.DATA);并添加此代码

if (cursor != null && cursor.moveToFirst())
 {
     int phoneIdx = cursor.getColumnIndex(Phone.DATA);
     int nameIdx = cursor.getColumnIndex(Phone.DISPLAY_NAME);
     name = cursor.getString(nameIdx);
 }

行后

cursor = getContentResolver().query(Phone.CONTENT_URI, null, Phone.CONTACT_ID + "=?", new String[] { id }, null);

Answer 2

我刚刚更改了代码：int PhoneIdx = cursor.getColumnIndex(Phone.DATA);

到int PhoneIdx = cursor.getColumnIndex(Phone.DISPLAY_NAME);

并且有效。

从联系人列表中选择名称并在android中的编辑文本中显示

2 个答案: