下面的C++代码执行int到string和string到int的转换.然后,它再次重复这些步骤.在stringstream对int线stream1 >> i3; 更是打破了代码.我在这里错过了什么?
#include <iostream>
#include <string>
#include <sstream>
using namespace std;
int main()
{
int i1 = 101;
int i2 = 202;
int i3 = 0;
string s1 = "";
string s2 = "";
stringstream stream1;
for (int i=0;i<2;i++)
{
//int to string
stream1.str("");
cout << "i1 " << i1 << endl;
stream1 << i1;
s1 = stream1.str();
cout << "s1 " << s1 << …Run Code Online (Sandbox Code Playgroud) 我想从这个基本适配器开始一个新的活动.
public class EfficientAdapter extends BaseAdapter {
private Activity activity;
private ArrayList<ComptePost> data;
private static LayoutInflater inflater = null;
public ImageLoader imageLoader;
public Boolean isActusAstuce;
public static int flag = 0, counter=0;
private Context context;
public EfficientAdapter(Context context) {
this.context = context;
}
NVirementEmmeteur main;
int num = 0;
ViewHolder holder;
static String src;
public EfficientAdapter(Activity a, ArrayList<ComptePost> d) {
activity = a;
data = d;
inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
// imageLoader = new ImageLoader(activity.getApplicationContext());
imageLoader=new ImageLoader(activity.getApplicationContext());
}
public EfficientAdapter(NVirementEmmeteur …Run Code Online (Sandbox Code Playgroud) 这已在StackOverflow上的许多帖子中得到解决.最推荐的解决方案是设置:
android:descendantFocusability="blocksDescendants"
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在列表项布局的根布局上.我做了以下事情.
android:descendantFocusability="blocksDescendants"在根目录的项目布局.setDescendantFocusability(BLOCK)在listView上调用,以及每个listViewItem.focus=disabled在ImageButtons上设置然而,当点击了孩子ImageButtons之一,我不能让在任何听众ListView或ListView项目射击.
下面是我用来呈现列表项的"模板".
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/reminderItem"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:descendantFocusability="blocksDescendants"
android:padding="0dp">
<RelativeLayout
android:id="@+id/topPartOfReminder"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp">
<LinearLayout
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:id="@+id/textLayout">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:fontFamily="sans-serif-light"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="22sp"
android:text="10:00"
android:textStyle="normal"
android:id="@+id/textTime"/>
<TextView
android:fontFamily="sans-serif-condensed"
android:textSize="9sp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="AM"
android:paddingLeft="2dp"
android:textStyle="normal"
android:id="@+id/textAmPm"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text=" - "
android:id="@+id/textDivider"/>
<TextView
android:fontFamily="sans-serif-light"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="16sp"
android:text="March 26"
android:id="@+id/textDate"/>
</LinearLayout>
<TextView
android:fontFamily="sans-serif-light"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="12sp"
android:text="Blah …Run Code Online (Sandbox Code Playgroud) 我想知道allOf方法CompletableFuture是否进行轮询或进入等待状态,直到所有CompletableFutures传递给该方法的执行完成。我在其中查看了该allOf方法的代码,IntelliJ它正在执行某种二进制搜索。
请帮助我找出实际的allOf方法CompletableFuture。
public static CompletableFuture<Void> allOf(CompletableFuture<?>... cfs) {
return andTree(cfs, 0, cfs.length - 1);
}
/** Recursively constructs a tree of completions. */
static CompletableFuture<Void> andTree(CompletableFuture<?>[] cfs, int lo, int hi) {
CompletableFuture<Void> d = new CompletableFuture<Void>();
if (lo > hi) // empty
d.result = NIL;
else {
CompletableFuture<?> a, b;
int mid = (lo + hi) >>> 1;
if ((a = (lo == mid ? …Run Code Online (Sandbox Code Playgroud) 我在PHP中编写代码,但我对以下编码风格感到困惑:
<html>
<head></head>
<body>
<?php echo 'Hello World'; ?>
<div>This is another</div>
<?php echo 'hello again'; ?>
</body>
</html>
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要么
<?php
echo '<html>
<head></head>
<body>
Hello World
<div>This is another</div>
hello again
</body>
</html>';
?>
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而且,在复杂的编程中哪个更好?
我正在开发一个FontViewer应用程序,它根据所选的字体样式更改文本的字体.
这是我的应用程序的控制器类
public class FXMLDocumentController implements Initializable {
@FXML
private ListView fontListView;
@FXML
private TextArea fontTextArea;
int[] fontSizes = {34, 28, 24, 20, 18, 16, 14, 12, 11, 10, 9, 8, 7, 6};
String fontText = "";
@Override
public void initialize(URL url, ResourceBundle rb) {
ObservableList<String> fontsList = FXCollections.observableArrayList(Font.getFontNames());
fontListView.setItems(fontsList);
}
@FXML
public void handleMouseClickEvent(MouseEvent mouseEvent) {
changeFont();
}
public void changeFont() {
for (int i = 0; i < fontSizes.length; i++) {
fontText += "<p style='font-family:" + fontListView.getSelectionModel().getSelectedItem() + …Run Code Online (Sandbox Code Playgroud) 该代码可以使用JDK 8(1.8.0_212)正常编译,但是无法同时使用Oracle jdk和open jdk的JDK 11(11.0.3)进行编译(aws corretto)
尝试使用javac和Maven(Maven 3.6.1版和Maven-compiler-plugin插件3.8.0版)进行编译,它针对JDK 8进行编译,而针对JDK 11则失败。
import java.net.URL;
import java.util.List;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.function.Function;
import java.util.stream.Stream;
public class AppDemo {
public static void main(String[] args) {
// NO error here
giveMeStream("http://foo.com").map(wrap(url -> new URL(url)));
List<String> list = new ArrayList<String>();
list.add("http://foo.com/, http://bar.com/");
// error: unreported exception MalformedURLException;
// must be caught or declared to be thrown
list.stream().flatMap(
urls -> Arrays.<String>stream(urls.split(",")).map(wrap(url -> new URL(url)))
);
// error: unreported exception MalformedURLException;
// must be caught or declared …Run Code Online (Sandbox Code Playgroud) 我有一个Android应用程序.当应用程序运行时,应该静音或禁用警报.关闭应用程序后,应再次启用警报.我用过这段代码:
AudioManager AudiMngr = (AudioManager) getSystemService(AUDIO_SERVICE);
AudiMngr.setRingerMode(AudioManager.RINGER_MODE_SILENT);
AudiMngr.setStreamVolume(AudioManager.STREAM_ALARM, 0, AudioManager.FLAG_SHOW_UI + AudioManager.FLAG_PLAY_SOUND);
Toast toast = Toast.makeText(getApplicationContext(), "Sound Muted", Toast.LENGTH_SHORT);
toast.show();
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但它仅在应用程序启动时有效.当警报满足警报时间时,它将启用.我希望在应用程序关闭之前将警报静音.我怎样才能做到这一点?
我可以知道为什么我的自定义listview适配器看起来像这样吗?
图片:
代码:
MainActivity.java
public class MainActivity extends AppCompatActivity {
CurrencyRatesDetails crd = new CurrencyRatesDetails();
TextView inputCurrTV, convertedAmtTV;
ListView currencyLV;
EditText inputAmtET;
ArrayAdapter<String> adapter;
String[] currNameArr = crd.getNames();
String[] currCodeArr = crd.getCodes();
String[] currRateArr = crd.getRates();
Context context;
int index = 0;
//String[] rateCurrArr = {"AUD", "BGN", "BRL", "CAD", "CHF", "CNY"};
//double[] rateArr = {0.944, 1.2824, 2.2842, 0.96158, 0.70946, 4.8624}
Menu myMenu = null;
double rate, amtInput, finalConversion;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context = this;
inputAmtET …Run Code Online (Sandbox Code Playgroud) Android Studio 2.3、Android 4.3、Galaxy Nexus。
我希望所选按钮(单击时)隐藏软键盘。
问题: