小编Geo*_*mas的帖子

我们如何在android中使用数据绑定将图像资源放入ImageView？

  <ImageView
            android:id="@+id/is_synced"
            android:src="@{model.pending ? @mipmap/pending: @mipmap/synced}"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

如果pending为true,我想要一个图像,如果pending为false,我想要另一个图像.但它显示错误.我如何实现此功能？

在身份验证之后,我可以从服务器访问令牌,"uyhjjfjfgg567f8fhjkkf"现在我想将其安全地保存在设备中.我查看了android开发者网站中的Keystore和Keychain.我不清楚它是如何工作的以及我们应该如何从密钥库中检索令牌.

KeyPairGenerator kpg = KeyPairGenerator.getInstance(
        KeyProperties.KEY_ALGORITHM_EC, "AndroidKeyStore");
kpg.initialize(new KeyGenParameterSpec.Builder(
        alias,
        KeyProperties.PURPOSE_SIGN | KeyProperties.PURPOSE_VERIFY)
        .setDigests(KeyProperties.DIGEST_SHA256,
            KeyProperties.DIGEST_SHA512)
        .build());

KeyPair kp = kpg.generateKeyPair();


/*
 * Load the Android KeyStore instance using the the
 * "AndroidKeyStore" provider to list out what entries are
 * currently stored.
 */

KeyStore ks = KeyStore.getInstance("AndroidKeyStore");
ks.load(null);
Enumeration<String> aliases = ks.aliases();

Android studio 2.0引入了即时运行功能,它不适合我,我知道2.0是在预览频道

有人用instarun设施试过2.0吗？

我在编辑文本搜索中使用rxandroid进行去抖操作

我用了

private void setUpText() {
        _mSubscription = RxTextView.textChangeEvents(searchStation)//
                .debounce(500, TimeUnit.MILLISECONDS)// default Scheduler is Computation
                .observeOn(AndroidSchedulers.mainThread())//
                .subscribe(getOps().getdata());
    }

和观察者一样

public Observer<TextViewTextChangeEvent> getdata()
    {

        return new Observer<TextViewTextChangeEvent>() {
            @Override
            public void onCompleted() {

            }

            @Override
            public void onError(Throwable e) {
                 e.printStackTrace();
            }

            @Override
            public void onNext(TextViewTextChangeEvent onTextChangeEvent) {
//                stationsugession(onTextChangeEvent.text().toString());

                //here i called link to get the data from the server
            }
        };
    }

我的问题是甚至在任何edittext更改发生之前调用链接.它没有调用textchange事件.我错过了什么我在这里做错了什么.我是rxandroid和rxjava的新手.

我用了

  compile 'io.reactivex:rxandroid:1.1.0'
    compile 'io.reactivex:rxjava:1.1.0'
    compile 'com.jakewharton.rxbinding:rxbinding:0.2.0'

编辑:

它现在可以工作,我在我的逻辑中得到一个空指针获取列表..当我使用onError方法并放置一个堆栈跟踪我发现问题.

如果你想跳过初始调用,那么我们应该将.skip(1)调用 到你的订阅对象.[感谢Daniel Lew ] …

在我的XAML中,我有这个StackLayout:

<StackLayout x:Name="FooterWrapper"
             Spacing="0"
             VerticalOptions="FillAndExpand"
             HorizontalOptions="FillAndExpand"
             BackgroundColor="Transparent">
    <BoxView BackgroundColor="Transparent" 
             HorizontalOptions="Center" 
             VerticalOptions="CenterAndExpand" 
             x:Name="can_applyComplete_topspace" />
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width=".07*" />
            <ColumnDefinition Width=".86*" />
            <ColumnDefinition Width=".07*" />
        </Grid.ColumnDefinitions>
         <Grid.RowDefinitions>
            <RowDefinition Height=".40*"/>
            <RowDefinition Height="Auto"/>
        </Grid.RowDefinitions>
        <controls:AndroidButton x:Name="can_applycomplete_gotitbtn" 
                                Grid.Row="0" 
                                Text="{Binding SkipButtonText}" 
                                StyleId="uit_can_applycomplete_gotitbtn" 
                                FontFamily="Avenir Next" 
                                BackgroundColor="White" 
                                Grid.Column="1" 
                                HorizontalOptions="FillAndExpand" 
                                VerticalOptions="Fill" 
                                TextColor="Black" 
                                Clicked="Handle_SkipClicked" />
        <controls:CustomLabel Grid.Row="1" 
                              Grid.Column="1" 
                              Text="{i18n:TranslateExtension Text= res_cand_candjobcompliance_profilereachedlbl_list_footer}" 
                              VerticalOptions="Center" 
                              IsVisible="{Binding IsFooterVisible}" 
                              x:Name="cand_candjobcompliance_profilereachedlbl_list_footer" 
                              StyleId="uit_cand_candjobcompliance_profilereachedlbl_list_footer" 
                              TextColor="White" 
                              FontSize="13" />
    </Grid>
</StackLayout>

我需要动态控制StackLayout的高度

在OnAppearing中,我为stacklayout设置了特定的高度

FooterWrapper.HeightRequest = 196

在iOS工作中,My new Height设置为视图但在android中我的高度被忽略.

我用.NET Standard 2.0创建了一个新的xamarin表单项目,在示例中我将标签更改为Button并添加了背景颜色.单击按钮时,波纹动画显示较小并集中在左上角,而不是整个按钮的宽度和高度

<Button Text="Welcome to Xamarin.Forms!" HorizontalOptions="Center" 
   VerticalOptions="CenterAndExpand" BackgroundColor="Lime"  />

我们需要做些什么来使波纹动画正确.

请参阅附图.

为了从服务器接收UDP广播包到android设备,我使用服务类并在线程中侦听数据包.它成功接收数据包.问题是如果在同一时间从服务器发送多个数据包,那么将导致数据包丢失.

我甚至尝试使用队列并在单独的线程中处理收到的数据包,然后我也没有收到数据包.我对网络编程完全陌生,任何帮助都会受到广泛赞赏

void startListenForUdpBroadcast() {
        UDPBroadcastThread = new Thread(new Runnable() {
            public void run() {
                try {
                    InetAddress broadcastIP = InetAddress.getByName(UdpConstants.IP_ADDRESS);
                    Integer port = UdpConstants.RECEIVER_PORT;
                    while (shouldRestartSocketListen) {
                        listenAndWaitAndThrowIntent(broadcastIP, port);
                    }

                } catch (Exception e) {
                    Log.i("UDP", "no longer listening for UDP broadcasts cause of error " + e.getMessage());
                }
            }
        });
        UDPBroadcastThread.setPriority(Thread.MAX_PRIORITY); //Setting The Listener thread to MAX PRIORITY to minimize packet loss.
        UDPBroadcastThread.start();
    }

此代码侦听新数据包并推送到队列

private void listenAndWaitAndThrowIntent(InetAddress broadcastIP, Integer port) throws Exception {
        byte[] recvBuf = new …

I am trying to enable SSO in our native iOS application. The scenario is

1. Implementing Sign in with microsoft using MSAL in organisational account
2. After logging in to the iOS application we need to open another of our web app(added in Azure directory) in a webview

What all should we do to enable SSO in iOS application and open the microsoft service within the application with webview.

当我尝试使用 MSAL 实现这一点时，用户体验是用户登录到应用程序，当我们尝试使用 webview 打开 webapp 时，它要求登录，而不是我们需要 webview 静默登录

在我用 angular 编写的 webapp …

我无法从 Playstore 控制台内的崩溃日志中找出导致崩溃的原因，它显示的是 android.runtime.JavaProxyThrowable。有时也会显示该地点，但未显示引发的原始异常。它是一个跨平台的 xamarin 表单应用程序。在我的情况下，日志看起来像

android.runtime.JavaProxyThrowable: at StackCardView.Com.Wenchao.Cardstack.CardStack.ICardEventListener.Discarded (System.Int32 p0, System.Int32 p1) [0x00000] in <9395370f1a304c7290a7531b2c3dfd4d>:0
at Com.Wenchao.Cardstack.CardStack+ICardEventListenerInvoker.n_Discarded_II (System.IntPtr jnienv, System.IntPtr native__this, System.Int32 p0, System.Int32 p1) [0x00009] in <54ad445d01d649f18c501aeb89761ae6>:0
at (wrapper dynamic-method) System.Object:97ca24d4-0414-43c1-a8ee-a1e52f293935 (intptr,intptr,int,int)
  at md5d9e2c345da228fe4f95e9f8464432261.StackCardView.n_discarded (Native Method)
  at md5d9e2c345da228fe4f95e9f8464432261.StackCardView.discarded (StackCardView.java:50)
  at com.wenchao.cardstack.CardStack$2$1.onAnimationEnd (CardStack.java:184)
  at com.wenchao.cardstack.CardAnimator$3.onAnimationEnd (CardAnimator.java:178)
  at android.animation.AnimatorSet$AnimatorSetListener.onAnimationEnd (AnimatorSet.java:855)
  at android.animation.ValueAnimator.endAnimation (ValueAnimator.java:1239)
  at android.animation.ValueAnimator$AnimationHandler.doAnimationFrame (ValueAnimator.java:766)
  at android.animation.ValueAnimator$AnimationHandler$1.run (ValueAnimator.java:801)
  at android.view.Choreographer$CallbackRecord.run (Choreographer.java:920)
  at android.view.Choreographer.doCallbacks (Choreographer.java:695)
  at android.view.Choreographer.doFrame (Choreographer.java:628)
  at android.view.Choreographer$FrameDisplayEventReceiver.run (Choreographer.java:906)
  at android.os.Handler.handleCallback (Handler.java:739)
  at android.os.Handler.dispatchMessage (Handler.java:95)
  at android.os.Looper.loop (Looper.java:158) …

这适用于onCreate的活动

String htmlstring="<p><em><strong>hello world</strong></em></p>";

    tv.setText(Html.fromHtml(html));

但是当我在listview中使用相同的服务器时,它无法正常工作

ViewHolder holder = new ViewHolder();

            holder.quest = (TextView) vi.findViewById(R.id.question_data);

            holder.quest.setText(Html.fromHtml(htmlstring));

怎么了!我怎么能实现这个目标？

我们如何使用QML或Javascript在画布上绘制模糊的圆圈？

我试过了:

var ctx = getContext("2d");
ctx.save();
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.beginPath();
ctx.shadowBlur = 20;
ctx.shadowColor = "#22ff0000";
ctx.shadowOffsetX = 10;
ctx.lineWidth = 1;
ctx.strokeStyle = "red";
ctx.arc(canvas.centerWidth,
  canvas.centerHeight,
  canvas.radius, canvas.angleOffset,
  canvas.angleOffset + canvas.angle);
ctx.stroke();
ctx.restore();

但我的问题是强大的线条可见.我需要平滑地绘制它没有边缘.这该怎么做？