int main(void)
{
unsigned int y = 10;
int x = – 4;
if (x > y)
Printf("x is greater");
else
Printf("y is greater");
getch();
return (0);
}
Output: x is greater
我认为输出y会更大,因为它是无符号的.这背后的原因是什么？
android中的BroadcastReceiver和ResultReceiver有什么区别？
我正在从数据库中读取属性文件.我检查过java.util.Properties,没有方法可以从String实例中解析.有什么办法吗？
我正在试图弄清楚新的API是如何工作的,所以我设法理解了这个概念,并设法做了我自己的"hello world",登录到facebook,注销并尝试上传图片.
现在在HelloFacebookSample和SessionLoginSimple中,只需登录到facebook,在HelloFacebookSample中,当您单击"发布照片"时,会出现一个新的登录对话框,因为未设置权限.
这是来自HelloFacebookSample的代码:
private void performPublish(PendingAction action) {
Session session = Session.getActiveSession();
if (session != null) {
pendingAction = action;
if (session.getPermissions().contains("publish_actions")) {
// We can do the action right away.
handlePendingAction();
} else {
// We need to reauthorize, then complete the action when we get called back.
Session.ReauthorizeRequest reauthRequest = new Session.ReauthorizeRequest(this, PERMISSIONS).
setRequestCode(REAUTHORIZE_ACTIVITY).
setLoginBehavior(SessionLoginBehavior.SSO_WITH_FALLBACK);
session.reauthorizeForPublish(reauthRequest);
}
}
}
因为我们没有"publish_actions",我们需要重新授权.
在SimpleSessionLogin中,登录如下所示:
private void onClickLogin() {
Session session = Session.getActiveSession();
if (!session.isOpened() && !session.isClosed()) {
session.openForRead(new Session.OpenRequest(this).setCallback(statusCallback));
} …有人知道如何在下载文件时在状态栏中使用通知图标吗？就像在app store中下载文件一样.图标就像在gif中.
我正在寻找一种GridViewColumn用组合框"完全填充"的方法.我能够创建一个单元格模板,ComboBox它工作正常.但是宽度和高度ComboBox并没有对齐GridViewColumn.即使我尝试设置相同的高度/宽度GridViewColumn隐藏了comboBox的某些部分.
必须有一些设置或样式来指示WPF ComboBox完全填充可用空间GridViewColumn
这是我的XAML.
<Window x:Class="WPFStarter.ComboInsideListView.ComboBoxInsideListViewUsingObject"
x:Name="userControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="ComboBoxInsideListViewUsingObject" Height="300" Width="400">
<Grid>
<ListView x:Name="listView" ItemsSource="{Binding ElementName=userControl,
Path=DataContext.Items}" SelectedItem="{Binding ElementName=userControl, Path=DataContext.SelectedItem, Mode=TwoWay}">
<ListView.View>
<GridView>
<GridViewColumn Header="First Name" DisplayMemberBinding="{Binding Path=First}"/>
<GridViewColumn Header="Gender">
<GridViewColumn.CellTemplate>
<DataTemplate>
<ComboBox x:Name="cmb_Gender" Width="75" SelectedValue="{Binding Path=Gender}"
ItemsSource="{Binding ElementName=userControl, Path=DataContext.Genders}" GotFocus="ComboBox_GotFocus" />
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
</GridView>
</ListView.View>
</ListView>
</Grid>
</Window>
我已经实现了目录选择器DialogFragment,现在我想用它DialogPreference.可能吗？怎么做？
我想要一个任务在1分钟的间隔后永远运行.为了实现这一点,我写了我的任务
public void poll() {
ScheduledExecutorService executorService= Executors.newScheduledThreadPool(1);
ScheduledFuture files=executorService.scheduleAtFixedRate(new Runnable() {
@Override
public void run() {
String path="/Desktop/PNL/Test";
List<String> filesPaths= new ArrayList<String>();
File folder= new File(path);
File[] listOfFiles= folder.listFiles();
for (File file : listOfFiles) {
filesPaths.add(file.getAbsolutePath());
}
if(!CollectionUtils.isEmpty(filesPaths)){
try{
update(filesPaths);
}
catch(Exception e){
System.out.println(e.toString());
}
}
}
}, 0, 1, TimeUnit.MINUTES);
files.cancel(false);
//executorService.shutdown();
}
但是任务只执行一次而不是每分钟后执行.我不明白这里有什么不对.
想象一下,你有2个这样的表:
mysql> SELECT * FROM theme;
+----+---------+------------+
| id | name | sort_order |
+----+---------+------------+
| 1 | Theme 1 | 1 |
| 2 | Theme 2 | 2 |
| 3 | Theme 3 | 3 |
| 4 | Theme 4 | 4 |
| 5 | Theme 5 | 5 |
| 6 | Theme 6 | 6 |
| 7 | Theme 7 | 7 |
+----+---------+------------+
mysql> SELECT * FROM article;
+----+------------+---------------------+----------+
| id …我正在尝试使用Android中的一些旧C++代码构建一个包装器.
在编译下面的错误时会显示:
In file included from /usr/local/android/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/bits/stl_algobase.h:61:0,
from /usr/local/android/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/bits/stl_tree.h:63,
from /usr/local/android/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/map:60,
from /home/vocalize/source/xxxxxxxxxxxxxxxxxxxxx/Lxxxxxxx.h:9,
from /home/vocalize/source/xxxxxxxxxxxxxxxxx/jni/cxxx_wrap.c:3:
/usr/local/android/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/bits/functexcept.h:43:1: error: unknown type name 'namespace'
/usr/local/android/android-ndk-r8b/sources/cxx-stl/gnu-libstdc++/4.6/include/bits/functexcept.h:44:1: error: expected ',' or ';' before '{' token
我正在使用以下Makefile.mk
include $(CLEAR_VARS)
LOCAL_C_INCLUDES := $(MY_LIB_DIR)include
LOCAL_CFLAGS += -DHAVE_CONFIG_H
LOCAL_CFLAGS += -DANDROID_NDK
LOCAL_PATH := $(BASE_PATH)
LOCAL_MODULE := cxxxx_lib
LOCAL_SRC_FILES := cxxxx_wrap.c
LOCAL_STATIC_LIBRARIES := my_lib
LOCAL_LDLIBS := -llog
include $(BUILD_SHARED_LIBRARY)
我能做些什么来解决这些错误？
我不太明白,提供商是指ContentProvider吗？或者我认为它们是一样的.
有任何想法吗？
嗨我对我已经制作的应用程序进行了一些更改...现在它很快就失败了...
这是日志条目的详细信息:
08-21 06:01:58.726: D/AndroidRuntime(782): Shutting down VM
08-21 06:01:58.756: W/dalvikvm(782): threadid=1: thread exiting with uncaught exception (group=0x414c4700)
08-21 06:01:58.796: E/AndroidRuntime(782): FATAL EXCEPTION: main
08-21 06:01:58.796: E/AndroidRuntime(782): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{hellog.diwesh.NugaBest/helog.diwesh.NugaBest.NUGA_HealthCareActivity_Intro}: java.lang.ClassNotFoundException: Didn't find class "helog.diwesh.NugaBest.NUGA_HealthCareActivity_Intro" on path: DexPathList[[zip file "/data/app/hellog.diwesh.NugaBest-2.apk"],nativeLibraryDirectories=[/data/app-lib/hellog.diwesh.NugaBest-2, /system/lib]]
08-21 06:01:58.796: E/AndroidRuntime(782): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2137)
08-21 06:01:58.796: E/AndroidRuntime(782): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
08-21 06:01:58.796: E/AndroidRuntime(782): at android.app.ActivityThread.access$600(ActivityThread.java:141)
08-21 06:01:58.796: E/AndroidRuntime(782): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
08-21 06:01:58.796: E/AndroidRuntime(782): at android.os.Handler.dispatchMessage(Handler.java:99)
08-21 06:01:58.796: E/AndroidRuntime(782): at android.os.Looper.loop(Looper.java:137)
08-21 06:01:58.796: E/AndroidRuntime(782): at android.app.ActivityThread.main(ActivityThread.java:5103)
08-21 …