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我試圖從Android設備本地日曆中獲取事件。我使用下面的代碼來檢索日曆中的事件。Android從本地設備日曆中檢索事件
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);
}
但我的應用程序得到墜毀在這一行：
cursor cursor = getContentResolver().query(Uri.parse("content://com.android.calendar/calendars"),
new String[] { "_id", "displayName" }, "selected=1", null, null);
我究竟做錯了在這個上面的代碼。請幫我解決這個問題。我在下面提到了我的崩潰日誌。
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)**