Question

我有一个按钮，其onclick处理程序定义如下：

    <Button
    android:id="@+id/ImportCalendar"
    style="?android:attr/buttonStyleSmall"
    android:layout_width="wrap_content"
    android:layout_height="34dp"
    android:onClick="icaltesting"
    android:paddingLeft="10dp"
    android:text="Import" />

现在我已经在我的activity类中定义了testing()函数，我想使用它 getContentResolver()函数最终在我的Android设备中创建本地日历。我使用的代码如下：

public void icaltesting(View view) {
    Uri calUri = CalendarContract.Calendars.CONTENT_URI;
    ContentValues cv = new ContentValues();
    cv.put(CalendarContract.Calendars.NAME, "Test");
    cv.put(CalendarContract.Calendars.CALENDAR_DISPLAY_NAME, "Local Calendar");
    cv.put(CalendarContract.Calendars.VISIBLE, 1);
    cv.put(CalendarContract.Calendars.SYNC_EVENTS, 1);

    calUri = calUri.buildUpon()
        .appendQueryParameter(CalendarContract.CALLER_IS_SYNCADAPTER, "true")
        .appendQueryParameter(CalendarContract.Calendars.ACCOUNT_NAME, "Test")
        .appendQueryParameter(CalendarContract.Calendars.ACCOUNT_TYPE,     CalendarContract.ACCOUNT_TYPE_LOCAL)
        .build();
    Uri result = getContentResolver().insert(calUri, cv);
  }

这是抛出IllegalStateException: Could not execute method of the activity并且app力关闭的最后一行。我想我没有正确地调用getContentResolver()函数。我该如何处理这个问题？

修改1 相关的堆栈跟踪是这样的：

   08-23 20:05:56.580: E/AndroidRuntime(24197): FATAL EXCEPTION: main
   08-23 20:05:56.580: E/AndroidRuntime(24197): java.lang.IllegalStateException: Could not execute method of the activity
   08-23 20:05:56.580: E/AndroidRuntime(24197):     at android.view.View$1.onClick(View.java:3044)
   08-23 20:05:56.580: E/AndroidRuntime(24197):     at android.view.View.performClick(View.java:3511)
   08-23 20:05:56.580: E/AndroidRuntime(24197):     at android.view.View$PerformClick.run(View.java:14105)
   08-23 20:05:56.580: E/AndroidRuntime(24197):     at android.os.Handler.handleCallback(Handler.java:605)
   08-23 20:05:56.580: E/AndroidRuntime(24197):     at android.os.Handler.dispatchMessage(Handler.java:92)
   08-23 20:05:56.580: E/AndroidRuntime(24197):     at android.os.Looper.loop(Looper.java:137)
   08-23 20:05:56.580: E/AndroidRuntime(24197):     at android.app.ActivityThread.main(ActivityThread.java:4575)
   08-23 20:05:56.580: E/AndroidRuntime(24197):     at java.lang.reflect.Method.invokeNative(Native Method)
   08-23 20:05:56.580: E/AndroidRuntime(24197):     at java.lang.reflect.Method.invoke(Method.java:511)
   08-23 20:05:56.580: E/AndroidRuntime(24197):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
   08-23 20:05:56.580: E/AndroidRuntime(24197):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
   08-23 20:05:56.580: E/AndroidRuntime(24197):     at dalvik.system.NativeStart.main(Native Method)
   08-23 20:05:56.580: E/AndroidRuntime(24197): Caused by: java.lang.reflect.InvocationTargetException
   08-23 20:05:56.580: E/AndroidRuntime(24197):     at java.lang.reflect.Method.invokeNative(Native Method)
   08-23 20:05:56.580: E/AndroidRuntime(24197):     at java.lang.reflect.Method.invoke(Method.java:511)
   08-23 20:05:56.580: E/AndroidRuntime(24197):     at android.view.View$1.onClick(View.java:3039)
   08-23 20:05:56.580: E/AndroidRuntime(24197): Caused by: java.lang.IllegalArgumentException: the name must not be empty: null
   08-23 20:05:56.580: E/AndroidRuntime(24197):     at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:166)
   08-23 20:05:56.580: E/AndroidRuntime(24197):     at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:136)
   08-23 20:05:56.580: E/AndroidRuntime(24197):     at android.content.ContentProviderProxy.insert(ContentProviderNative.java:415)
   08-23 20:05:56.580: E/AndroidRuntime(24197):     at android.content.ContentResolver.insert(ContentResolver.java:735)
   08-23 20:05:56.580: E/AndroidRuntime(24197):     at com.example.myfirstapp.CalendarTest.icaltesting(CalendarTest.java:117)

Answer 1

我想如果仔细观察堆栈跟踪，你会发现另一个异常。这个例外是根本原因。

但实际上这并不重要。没有正确的方法从onClick处理程序调用getContentResolver（）。你根本不应该在UI线程上使用它。改为安排AsyncTask。

更新：根据文档，您缺少几个必填字段

插入

插入新日历时，必须包含以下字段：

ACCOUNT_NAME

ACCOUNT_TYPE

NAME

CALENDAR_DISPLAY_NAME

CALENDAR_COLOR

CALENDAR_ACCESS_LEVEL

OWNER_ACCOUNT

如何从onclick事件中正确调用getContentResolver（）

1 个答案: