小编Dev*_*ngh的帖子

我正在使用CoordinatorLayout这个效果:

这是布局代码:

    <?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/coordinatorRootLayout"
    android:background="@android:color/background_light"
    android:fitsSystemWindows="true"
    >


<android.support.design.widget.AppBarLayout
            android:id="@+id/android_appbar_layout"
            android:layout_width="match_parent"
            android:layout_height="220dp"
            android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

            <android.support.design.widget.CollapsingToolbarLayout
                android:id="@+id/collapsingToolbarLayoutAndroidExample"
                android:layout_width="match_parent"
                android:background="#fff"
                app:collapsedTitleGravity="left"
                app:expandedTitleTextAppearance="@color/card_outline"
                android:layout_height="match_parent"
                app:layout_scrollFlags="scroll|exitUntilCollapsed"
                android:fitsSystemWindows="true"
                app:expandedTitleGravity="center_horizontal"
                app:contentScrim="?attr/colorPrimary"
                app:statusBarScrim="?attr/colorPrimary"
                app:expandedTitleMarginStart="32dp"
                app:expandedTitleMarginEnd="48dp">

            <ImageView
                    android:id="@+id/parallax_header_imageview"
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:scaleType="fitXY"
                    android:src="@drawable/orange_triangle"
                    app:layout_collapseMode="parallax"
                    app:layout_collapseParallaxMultiplier="0.8"/>


                <ImageView
                    app:expandedTitleGravity="center_horizontal"
                    android:id="@+id/someImage"
                    android:layout_width="100dp"
                    android:layout_height="100dp"
                    android:src="@drawable/circle"
                    android:layout_gravity="center_horizontal"
                    app:layout_collapseMode="parallax"
                    app:layout_collapseParallaxMultiplier="-1"
                    />
                <android.support.v7.widget.Toolbar
                    android:id="@+id/toolbar_android"
                    android:layout_width="match_parent"
                    android:layout_height="?attr/actionBarSize"
                    app:layout_collapseMode="none"
                    app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
                    app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" />

            </android.support.design.widget.CollapsingToolbarLayout>


        </android.support.design.widget.AppBarLayout>
    <android.support.v4.widget.NestedScrollView
            android:id="@+id/nested_scroll_view"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fillViewport="true"
            app:layout_behavior="@string/appbar_scrolling_view_behavior">

            <LinearLayout
                android:id="@+id/linear_layout_android"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:padding="15dp"
                android:background="@color/off_white"
                android:layout_gravity="center_horizontal"
                android:gravity="center_horizontal"
                android:orientation="vertical">

                <GridView
                    android:id="@+id/gridview_parallax_header" …

我在过去四天尝试使用自己的XMPP和Smack + OpenFire发送和接收聊天消息.根据Smack的"readme.txt"我设置连接并登录用户.连接和登录的代码是这个

public static String TAG = "Test connection";
private static XMPPTCPConnection connection;
private static String userName = "demo";
private static String Password = "demo";

static {
    // Create the configuration for this new connection
    XMPPTCPConnectionConfiguration.Builder configBuilder = XMPPTCPConnectionConfiguration.builder();
    configBuilder.setSecurityMode(XMPPTCPConnectionConfiguration.SecurityMode.disabled);
    configBuilder.setResource("");
    configBuilder.setUsernameAndPassword(userName, Password);
    configBuilder.setServiceName("192.168.2.10");
    configBuilder.setHost("192.168.2.10");
    configBuilder.setPort(5222);
    configBuilder.setCompressionEnabled(false);
    connection = new XMPPTCPConnection(configBuilder.build());
}

这样我配置了connectionbuilder.在这里,我正在连接并签署用户.

public class ConnectAndLogin extends AsyncTask<Void, Void, Void> {
    @Override
    protected Void doInBackground(Void... params) {
        try {
            connection.connect();
            Log.i(TAG, "Connected to " + connection.getHost());
        } catch (SmackException …

Cannot locate tasks that match ':composeApp:compileJava' as task 'compileJava' is ambiguous in project ':composeApp'. Candidates are: 'compileDebugAndroidTestJavaWithJavac', 'compileDebugJavaWithJavac', 'compileDebugUnitTestJavaWithJavac', 'compileReleaseJavaWithJavac', 'compileReleaseUnitTestJavaWithJavac'.

* Try:
> Run gradle tasks to get a list of available tasks.
> For more on name expansion, please refer to https://docs.gradle.org/8.4/userguide/command_line_interface.html#sec:name_abbreviation in the Gradle documentation.
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
> Get …

我正在使用daimajia/AndroidImageSlider.我导入了所有依赖项,如NineOldAndroid,Picasso和这个'com.daimajia.slider:library:1.1.2@aar',并在Github上编码引导.但每当我试图运行应用程序时它会停止并显示错误.我的biuld.gradle应用程序是.谢谢你.已经花了两天时间.

dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
compile 'com.android.support:appcompat-v7:22.1.0'
compile 'com.squareup.picasso:picasso:2.3.2'
compile 'com.daimajia.slider:library:1.1.2@aar'
compile 'com.android.support:recyclerview-v7:21.0.+'
compile files('C:/Users/Vinit/Downloads/Coupan/library/volley.jar')
compile files('C:/Users/Vinit/Downloads/Coupan/library/nineoldandroids-2.3.0.jar')}

不知道我在哪里做错了什么.这是我的日志文件.

java.lang.NoClassDefFoundError: com.nineoldandroids.view.ViewHelper
        at com.daimajia.slider.library.Transformers.BaseTransformer.onPreTransform(BaseTransformer.java:75)
        at com.daimajia.slider.library.Transformers.BaseTransformer.transformPage(BaseTransformer.java:42)
        at com.daimajia.slider.library.Tricks.ViewPagerEx.onPageScrolled(ViewPagerEx.java:1727)
        at com.daimajia.slider.library.Tricks.ViewPagerEx.pageScrolled(ViewPagerEx.java:1649)
        at com.daimajia.slider.library.Tricks.ViewPagerEx.scrollToItem(ViewPagerEx.java:581)
        at com.daimajia.slider.library.Tricks.ViewPagerEx.onLayout(ViewPagerEx.java:1599)
        at android.view.View.layout(View.java:15131)
        at android.view.ViewGroup.layout(ViewGroup.java:4862)
        at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1160)
        at android.view.View.layout(View.java:15131)
        at android.view.ViewGroup.layout(ViewGroup.java:4862)
        at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1160)
        at android.view.View.layout(View.java:15131)
        at android.view.ViewGroup.layout(ViewGroup.java:4862)
        at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1160)
        at android.view.View.layout(View.java:15131)
        at android.view.ViewGroup.layout(ViewGroup.java:4862)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:515)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:450)
        at android.view.View.layout(View.java:15131)
        at android.view.ViewGroup.layout(ViewGroup.java:4862)
        at android.support.v7.internal.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:493)
        at android.view.View.layout(View.java:15131)
        at android.view.ViewGroup.layout(ViewGroup.java:4862)
        at android.widget.FrameLayout.layoutChildren(FrameLayout.java:515)
        at android.widget.FrameLayout.onLayout(FrameLayout.java:450)
        at android.view.View.layout(View.java:15131)
        at …

我的应用程序的要求是listview项目的浅色但不透明的颜色.我得到随机颜色,但它经常很暗.而且我不知道在哪个范围内我才能获得浅色.随机给出的范围是这样的:

 Random rndm = new Random();
 int color = Color.argb(255, rndm.nextInt(256), rndm.nextInt(256), rndm.nextInt(256));
 RelativeLayout rl=(RelativeLayout)rowView.findViewById(R.id.front);
 rl.setBackgroundColor(color);

我以前从未使用过这个库，现在我正在尝试使用它并添加所需的依赖项，但项目没有被同步。这是我的构建 gradle ：

dependencies {
        implementation fileTree(dir: 'libs', include: ['*.jar'])

        // implement support libraries
        implementation 'com.android.support:appcompat-v7:27.0.2'
        implementation 'com.android.support:animated-vector-drawable:27.0.2'
        implementation 'com.android.support:design:27.0.2'
        implementation 'com.android.support.constraint:constraint-layout:1.1.3'
        implementation 'com.android.support:support-v4:27.0.2'

        // implement firebase libraries
        implementation 'com.google.firebase:firebase-auth:11.0.4'
        implementation 'com.google.firebase:firebase-database:11.0.4'
        implementation 'com.google.firebase:firebase-storage:11.0.4'
        implementation 'com.google.firebase:firebase-core:11.0.4'

        // implement firebase-ui
        implementation 'com.firebaseui:firebase-ui-database:2.3.0'

        // implement lifecycle
        implementation 'android.arch.lifecycle:extensions:1.1.0'

        // implement circle image view
        implementation 'de.hdodenhof:circleimageview:2.2.0'

        // implement image cropper
        implementation 'com.theartofdev.edmodo:android-image-cropper:2.7.0'

        // implement image compressor
        implementation 'id.zelory:compressor:2.1.0'

        // implement test
        testImplementation 'junit:junit:4.12'
    //    implementation 'io.reactivex.rxjava2:rxjava:2.1.5'
        implementation 'io.reactivex.rxjava2:rxjava:2.2.0'
    //    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    //    androidTestImplementation …

我得到以下字符串:

 String line = "#food was testy. #drink lots of. #night was fab. #three #four";

我想借此#food #drink #night #three和#four从它.

我试过这段代码:

    String[] words = line.split("#");
    for (String word: words) {
        System.out.println(word);
    }

但它给food was testy,drink lots of,nigth was fab,three和four.