內容提供商中的列表內容Android 3.1

Question

我在摩托羅拉xoom（SDK Lvl 12）上使用了android 3.1，我在想如何知道哪些數據可以通過Content Provider訪問。

有沒有可能「列出」內容提供者，知道里面有什麼？

我試圖通過下面的代碼來訪問，從平板電腦的聯繫人：

 Cursor people = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null); 

但它給我的每一次錯誤，我可能做了錯事，這就是爲什麼我想知道是什麼是可訪問的和如何。

編輯：通過平板給出的誤差爲以下幾點：

The application xx(process.com.xx.xx) has stopped unexpectedly. Please try again. 

這是我的manifest.xml

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
     package="com.x.y" 
     android:versionCode="1" 
     android:versionName="1.0"> 
    <uses-sdk android:minSdkVersion="12" /> 
    <application android:icon="@drawable/icon" android:label="@string/app_name"> 
     <activity android:name=".xy" 
        android:label="@string/app_name"> 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 
       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
     <uses-permission android:name="android.permission.READ_CONTACTS" /> 
     <uses-permission android:name="android.permission.ACCESS_CHECKIN_PROPERTIES" /> 
    </application> 
</manifest> 

和調試器說

10-21 15:45:40.789: DEBUG/dalvikvm(141): GC_EXPLICIT freed 8K, 11% free 18190K/20295K, paused 3ms+3ms 
10-21 15:45:41.859: ERROR/DatabaseUtils(197): Writing exception to parcel 
10-21 15:45:41.859: ERROR/DatabaseUtils(197): java.lang.SecurityException: Permission Denial: reading com.android.providers.contacts.ContactsProvider2 uri content://com.android.contacts/contacts from pid=406, uid=10039 requires android.permission.READ_CONTACTS 
10-21 15:45:41.859: ERROR/DatabaseUtils(197):  at android.content.ContentProvider$Transport.enforceReadPermission(ContentProvider.java:309) 
10-21 15:45:41.859: ERROR/DatabaseUtils(197):  at android.content.ContentProvider$Transport.bulkQuery(ContentProvider.java:178) 
10-21 15:45:41.859: ERROR/DatabaseUtils(197):  at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:111) 
10-21 15:45:41.859: ERROR/DatabaseUtils(197):  at android.os.Binder.execTransact(Binder.java:320) 
10-21 15:45:41.859: ERROR/DatabaseUtils(197):  at dalvik.system.NativeStart.run(Native Method) 
10-21 15:45:41.869: DEBUG/AndroidRuntime(406): Shutting down VM 
10-21 15:45:41.869: WARN/dalvikvm(406): threadid=1: thread exiting with uncaught exception (group=0x40014760) 
10-21 15:45:41.889: ERROR/AndroidRuntime(406): FATAL EXCEPTION: main 
10-21 15:45:41.889: ERROR/AndroidRuntime(406): java.lang.SecurityException: Permission Denial: reading com.android.providers.contacts.ContactsProvider2 uri content://com.android.contacts/contacts from pid=406, uid=10039 requires android.permission.READ_CONTACTS 

謝謝。

Answer 1

試試這個，以獲得聯繫人：

Cursor cur = getContentResolver().query(ContactsContract.Contacts.CONTENT_URI, null, null, null, ContactsContract.Contacts.DISPLAY_NAME + " asc"); 
    if (cur.getCount() > 0) { 
     while (cur.moveToNext()) { 
      String id = cur.getString(cur.getColumnIndex(ContactsContract.Contacts._ID)); 
      String name = cur.getString(cur.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME)); 
      Log.d("TAG", "ID: " + id + " Name: " + name); 
     } 
    } 
    cur.close();