我想在我的项目中使用自定义组件,我想将它添加到下面的枚举属性,我该怎么做?
<com.abb.abbcustomcompanents.buttons.AbbButton
android:id="@+id/abbBtn1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:Type="How can i use enum here"
/>
<?xml version="1.0" encoding="utf-8"?>
<resources>
<declare-styleable name="abbButton">
<attr name="Type" format="enum"/>
<attr name="onAction" format="string"/>
</declare-styleable>
</resources>
Run Code Online (Sandbox Code Playgroud)
谢谢 !
我有一个创建像下面的发射器的方法,有一个问题(也许这是正常的行为)在改装回调中调用onError.尝试调用onError时,我得到了UndeliverableException.
我可以通过检查subscriber.isDiposed()来解决这个问题,我想知道如何调用onError coz我需要通知我的UI级别.
- 增加1
Run Code Online (Sandbox Code Playgroud)--> RxJava2CallAdapterFactoryalready implemented private static Retrofit.Builder builderSwift = new Retrofit.Builder() .baseUrl(URL_SWIFT) .addCallAdapterFactory(RxJava2CallAdapterFactory.create()) .addConverterFactory(GsonConverterFactory.create()) .addConverterFactory(new ToStringConverterFactory()); --> When i added below code to application class app won't crash --> but i get java.lang.exception instead of my custom exception RxJavaPlugins.setErrorHandler(Functions<Throwable>emptyConsumer()); @Override public void onFileUploadError(Throwable e) { Log.d(TAG, "onFileUploadError: " + e.getMessage()); }
public Observable<UploadResponseBean> upload(final UploadRequestBean uploadRequestBean, final File file) {
return Observable.create(new ObservableOnSubscribe<UploadResponseBean>() {
@Override
public void subscribe(@NonNull final ObservableEmitter<UploadResponseBean> subscriber) throws Exception {
// ---> There …Run Code Online (Sandbox Code Playgroud) 我可以制作较小的最后2个数字,但我希望它们显示如下图所示的顶部.
TextView TV = (TextView)findViewById(R.id.txt);
Spannable WordtoSpan = new SpannableString("13.500,27");
WordtoSpan.setSpan( new TextAppearanceSpan(null, 0, 12, null, null), WordtoSpan.length()-2, WordtoSpan.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
TV.setText(WordtoSpan);
Run Code Online (Sandbox Code Playgroud)
谢谢塔哈

当我正在阅读工厂时,首先设计图案书上的抽象工厂设计模式.它提到了这句话.
你能给出一个基本的例子和解释来澄清它.
当我尝试在测试下运行时,我得到了AmbiguousViewMatcherException,如何从多个视图中获得预期的视图.
昂达(hasToString(startsWith( "ALS")))inAdapterView(allOf(withId(android.R.id.list)))atPosition(0).perform(点击())..
android.support.test.espresso.AmbiguousViewMatcherException: '(with id: android:id/list)' matches multiple views in the hierarchy.
Problem views are marked with '****MATCHES****' below.
View Hierarchy:
+>DecorView{id=-1, visibility=VISIBLE, width=1440, height=2560, has-focus=false, has-focusable=true, has-window-focus=true, is-clickable=false, is-enabled=true, is-focused=false, is-focusable=false, is-layout-requested=false, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0, child-count=3}
|
+->LinearLayout{id=-1, visibility=VISIBLE, width=1440, height=2392, has-focus=false, has-focusable=true, has-window-focus=true, is-clickable=false, is-enabled=true, is-focused=false, is-focusable=false, is-layout-requested=false, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0, child-count=2}
|
+-->ViewStub{id=16909171, visibility=GONE, width=0, height=0, has-focus=false, has-focusable=false, has-window-focus=true, is-clickable=false, is-enabled=true, is-focused=false, is-focusable=false, is-layout-requested=true, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0}
|
+-->FrameLayout{id=16908290, res-name=content, …Run Code Online (Sandbox Code Playgroud) 我有一个实现以下接口的基类,在其上声明的方法抛出基本的异常类型Exception.
有很多具体的类扩展了基类,我不想try-catch在所有这些类中添加一个块.有没有办法处理throws而不添加try-catch?
接口
public interface IReportFactory {
public Object GetDataFromDB(Connection conn,HashMap<String,String> map) throws Exception;
public Object GetJSONString(HashMap<String,String> map) throws Exception;
}
Run Code Online (Sandbox Code Playgroud)
基类
public abstract class BaseReport implements IReportFactory{
public Connection conn;
public String acctId = FactoryReport.getAcctId();
------ I WANT TO CATCH EXCEPTION HERE ------
------ WHICH ACCURS IN OTHER CLASSES WHICH EXTENDS FROM THIS CLASSES -----
}
Run Code Online (Sandbox Code Playgroud)
具体类的例子(有30个)
public class GeneralRevenue extends BaseReport {
private final Logger logger …Run Code Online (Sandbox Code Playgroud) 我已经创建了一个类,其中包含一个带有我的应用程序徽标的自定义标题栏.这种方法很有效,但对于我的大多数类,我需要能够继承该功能以及ListActivity的功能.该怎么办?
任何帮助赞赏.
我有一个LinearLayout可以有很多孩子观点.以编程方式添加子视图.
i need this distance
<---------------------->
--------------------------------wrapper ln----------------------------------
- ... cv4 cv3 cv2 cv1 -
----------------------------------------------------------------------------
Run Code Online (Sandbox Code Playgroud)
Wrapper ln gravity设置为右侧,因此每个添加的子视图都正确.
例如,当我点击"cv4"时,我需要从包装线性布局的右侧获得距离.
子视图属于LinearLayout类型.
我有以下 firestore 结构和一种从数据库获取用户提要的方法。
我需要像链接我的流
首先来自 User/FeedIDs 集合的所有提要 ID
然后对于每个 feedID,获取有关提要详细信息的文档并返回到它们的列表。
我可以找到解决此问题的方法,因为toList() 它不起作用或我做错了什么。
// User Collection
- User
- RandomDocumentID
- Feed
- FeedIDasDocumentID
- field1
- field2
.
.
// Feed Collection
- Feed
- RandomDocumentID
- field1
- field2
.
.
// Method in my repository to get feed for User
Observable<Feed> getCurrentUserFeed(String uid) {
return Observable(Firestore.instance
.collection('User')
.document(uid)
.collection("FeedIDs")
.snapshots()
.expand((snapshots) => snapshots.documents)
.map((document) => UserFeed.fromMap(document.data))
)
.flatMap((userFeed) => Firestore.instance
.collection("Feed")
.document(userFeed.id)
.snapshots()
)
.map((document) => Feed.fromMap(document.data)); …Run Code Online (Sandbox Code Playgroud) 我仍然首先阅读工厂模式.我们有一个pizzaStore示例,并尝试本地化我们的pizzaStore类,让franchies自由拥有自己的区域风格.
为此,我们将pizzaStore类更改为抽象类,并将工厂对象移动到"abstract createPizza(String type);" 方法.没关系,我理解为什么.
如果你看一下这张照片,我强调了这句话.这是什么意思 ?" 如果我们真的想要执行,我们可以让方法最终?"

谁能解释两种方法之间有什么区别?
方法1
public void run(){
run();
}
Run Code Online (Sandbox Code Playgroud)
方法2
public void run(){
while(true){
}
}
Run Code Online (Sandbox Code Playgroud)