联系人信息工具类，提示路径不对？我是照着系统源码写的路径

Question

package com.example.mobilesafe.utils;

import java.util.ArrayList;
import java.util.List;

import android.content.ContentResolver;
import android.content.Context;
import android.database.Cursor;
import android.net.Uri;

public class ContactInfoUtils {
/**
* 联系人信息的工具类
*
* @param context
* 上下文
* @return
*/
public static List getContactInfos(Context context) {
// 内容提供者的解析器
ContentResolver resolver = context.getContentResolver();
Uri uri = Uri.parse("content://com.android.contacts/raw_contacts");
Uri dateuri = Uri.parse("content://com.android.contacts/date");
Cursor cursor = resolver.query(uri, new String[] { "contact_id" },
null, null, null);
List contactInfos = new ArrayList();
while (cursor.moveToNext()) {
String id = cursor.getString(0);
System.out.println("id" + id);
if (id != null) {
ContactInfo info = new ContactInfoUtils().new ContactInfo();
Cursor datecursor = resolver.query(dateuri, new String[] {
"data1", "mimetype" }, "raw_contact_id=?",
new String[] { id }, null);
while (datecursor.moveToNext()) {
String data1 = datecursor.getString(0);
String mimetype = datecursor.getString(1);
if ("vnd.android.cursor.item/name".equals(mimetype)) {
// 姓名
info.name = data1;
} else if ("vnd.android.cursor.item/phone_v2"
.equals(mimetype)) {
// 电话
info.phone = data1;
} else if ("vnd.android.cursor.item/email_v2"
.equals(mimetype)) {
// 邮箱
info.email = data1;
}
}
contactInfos.add(info);
}
}
return contactInfos;
}

public class ContactInfo {
    public String name;
    public String email;
    public String phone;
}

}

09-24 10:34:03.127: E/AndroidRuntime(31902): FATAL EXCEPTION: main
09-24 10:34:03.127: E/AndroidRuntime(31902): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.mobilesafe/com.example.mobilesafe.activities.SelectContactActivity}: java.lang.IllegalArgumentException: URI: content://com.android.contacts/date, calling user: com.example.mobilesafe, calling package:com.example.mobilesafe ，为啥会是非法数据
09-24 10:34:03.127: E/AndroidRuntime(31902): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
09-24 10:34:03.127: E/AndroidRuntime(31902): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
09-24 10:34:03.127: E/AndroidRuntime(31902): at android.app.ActivityThread.access$600(ActivityThread.java:130)
09-24 10:34:03.127: E/AndroidRuntime(31902): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
09-24 10:34:03.127: E/AndroidRuntime(31902): at android.os.Handler.dispatchMessage(Handler.java:99)
09-24 10:34:03.127: E/AndroidRuntime(31902): at android.os.Looper.loop(Looper.java:137)
09-24 10:34:03.127: E/AndroidRuntime(31902): at android.app.ActivityThread.main(ActivityThread.java:4745)
09-24 10:34:03.127: E/AndroidRuntime(31902): at java.lang.reflect.Method.invokeNative(Native Method)
09-24 10:34:03.127: E/AndroidRuntime(31902): at java.lang.reflect.Method.invoke(Method.java:511)
09-24 10:34:03.127: E/AndroidRuntime(31902): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
09-24 10:34:03.127: E/AndroidRuntime(31902): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
09-24 10:34:03.127: E/AndroidRuntime(31902): at dalvik.system.NativeStart.main(Native Method)
09-24 10:34:03.127: E/AndroidRuntime(31902): Caused by: java.lang.IllegalArgumentException: URI: content://com.android.contacts/date, calling user: com.example.mobilesafe, calling package:com.example.mobilesafe
09-24 10:34:03.127: E/AndroidRuntime(31902): at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:170)
09-24 10:34:03.127: E/AndroidRuntime(31902): at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:140)
09-24 10:34:03.127: E/AndroidRuntime(31902): at android.content.ContentProviderProxy.query(ContentProviderNative.java:366)
09-24 10:34:03.127: E/AndroidRuntime(31902): at android.content.ContentResolver.query(ContentResolver.java:370)
09-24 10:34:03.127: E/AndroidRuntime(31902): at android.content.ContentResolver.query(ContentResolver.java:313)
09-24 10:34:03.127: E/AndroidRuntime(31902): at com.example.mobilesafe.utils.ContactInfoUtils.getContactInfos(ContactInfoUtils.java:32)
09-24 10:34:03.127: E/AndroidRuntime(31902): at com.example.mobilesafe.activities.SelectContactActivity.onCreate(SelectContactActivity.java:26)
09-24 10:34:03.127: E/AndroidRuntime(31902): at android.app.Activity.performCreate(Activity.java:5008)
09-24 10:34:03.127: E/AndroidRuntime(31902): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
09-24 10:34:03.127: E/AndroidRuntime(31902): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
09-24 10:34:03.127: E/AndroidRuntime(31902): ... 11 more

Answer 1

如果你的程序没问题，那么就是权限的问题。