Question

我试图从android中的设备本地日历中获取事件。我使用以下代码从日历中检索事件。

cursor cursor = getContentResolver().query(Uri.parse("content://com.android.calendar/calendars"),
               new String[] { "_id", "displayName" }, null, null, null);       
// Cursor cursor = cr.query(Uri.parse("content://calendar/calendars"), new String[]{ "_id", "name" }, null, null, null);

while (cursor.moveToNext()) 
{
    final String _id = cursor.getString(0);
    final String displayName = cursor.getString(1);
    final Boolean selected = !cursor.getString(2).equals("0");
    System.out.println("Id: " + _id + " Display Name: " + displayName + " Selected: " + selected);
}

但我的应用程序在此行中崩溃了：

cursor cursor = getContentResolver().query(Uri.parse("content://com.android.calendar/calendars"),
           new String[] { "_id", "displayName" }, "selected=1", null, null);

上述代码中出错了什么。请帮我解决这个问题。我在下面提到了我的崩溃日志。

android.database.sqlite.SQLiteException: no such column: displayName: , while compiling: SELECT _id, displayName FROM Calendars WHERE (selected=1)
    at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:181)
             at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:137)
    at android.content.ContentProviderProxy.query(ContentProviderNative.java:358)
    at android.content.ContentResolver.query(ContentResolver.java:312)
    at com.creagx.VideosActivity$4.onClick(VideosActivity.java:161)
          at android.view.View.performClick(View.java:3517)
            at android.view.View$PerformClick.run(View.java:14155)
    at android.os.Handler.handleCallback(Handler.java:605)
    at android.os.Handler.dispatchMessage(Handler.java:92)
    at android.os.Looper.loop(Looper.java:154)
    at android.app.ActivityThread.main(ActivityThread.java:4624)
             at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:511)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:809)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:576)
    at dalvik.system.NativeStart.main(Native Method)**

Answer 1

请使用标准日历提供程序及其参数而不是字符串。您假设该表具有“displayname”列。

请参阅正确的implementation

Android从本地设备日历中检索事件

1 个答案: