小编Ant*_*nto的帖子

我正在开发一个应用程序tabLayout.

我有一个问题:当我尝试重新激活a时Fragment,该方法OnResume未被调用.

这是我的活动:

 private void init() {
    fab = (FloatingActionButton) findViewById(R.id.fab);
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Snackbar.make(view, "Nuovo Ticket", Snackbar.LENGTH_LONG)
                    .setAction("Action", null).show();
        }
    });


    TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
    tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);

    final ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
    final PagerAdapter adapter = new PagerAdapter
            (getSupportFragmentManager(), tabLayout.getTabCount());
    viewPager.setAdapter(adapter);

    tabLayout.setupWithViewPager(viewPager);
}

我像这样使用FragmentStatePagerAdapter:

public class PagerAdapter extends FragmentStatePagerAdapter {
int mNumOfTabs;

public PagerAdapter(FragmentManager fm, int NumOfTabs) {
    super(fm);
    this.mNumOfTabs = NumOfTabs;
}

@Override
public Fragment …

我是 Kotlin 的新手。我需要从 Java 类调用在 Kotlin 中创建的类中的方法。有问题的类涉及数据库的创建。

@Database(entities = arrayOf(Indirizzo::class, Dispositivo::class), version = 1, exportSchema = false)
abstract class WppDb : RoomDatabase() {
    abstract fun DispositivoDao(): DispositivoDao
    abstract fun IndirizzoDao(): IndirizzoDao

    private var INSTANCE : WppDb? = null

    fun getInstance(context: Context): WppDb? {
        if (INSTANCE == null) {
            synchronized(WppDb::class) {
                INSTANCE = Room.databaseBuilder(context.getApplicationContext(),
                            WppDb::class.java, "weather.db")
                           .build()
            }
        }
        return INSTANCE
    }

    fun destroyInstance() {
        INSTANCE = null
    }
}

我需要getInstance()从 Java Activity调用该方法。

我在我的应用程序中导入了一个模块.当我尝试运行它时,控制台显示此错误:**错误:任务':app:dexDebug'的执行失败.

com.android.ide.common.process.ProcessException:org.gradle.process.internal.ExecException:进程'命令'/Library/Java/JavaVirtualMachines/jdk1.8.0_65.jdk/Contents/Home/bin/java''完成非零退出值2**

我有2个gradle.

第一个gradle(我的申请)

apply plugin: 'test.test.myapplication'
android {
compileSdkVersion 21
buildToolsVersion "21.1.2"
defaultConfig {
    applicationId "alo.com.geoapp"
    minSdkVersion 8
    targetSdkVersion 19
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
productFlavors {
}

}dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:21.0.3'
compile files('libs/gson-2.2.2.jar')
compile project(':sdktools')}

第二个gradle(模块导入)

apply plugin: 'com.android.library'
android {
compileSdkVersion 21
buildToolsVersion "20.0.0"
defaultConfig {
    minSdkVersion 8
    targetSdkVersion 19
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false …

当用户在webview中按某些东西时,我需要获取一个URL.我用这个代码:

webView = (WebView) rootView.findViewById(R.id.webView);
    WebSettings webSettings = webView.getSettings();
    webSettings.setJavaScriptEnabled(true);
    webView.loadUrl("my url");
    webView.setWebViewClient(new MyWebClient());

MyWebClien

 private class MyWebClient extends WebViewClient {
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        Log.e("URL", url);
        return true;
    }
}

但是,如果我点击某些内容,则永远不会调用该事件.谢谢

更新android studio和gradle后,我无法再编译(在发布模式下)我的应用程序.当我尝试生成APK时,我收到此错误:

找不到org.codehaus.groovy:groovy-all:2.4.12.在以下位置搜索:file:/Users/antonioleva/Library/Android/sdk/extras/m2repository/org/codehaus/groovy/groovy-all/2.4.12/groovy-all-2.4.12.pom文件:/ Users /antonioleva/Library/Android/sdk/extras/m2repository/org/codehaus/groovy/groovy-all/2.4.12/groovy-all-2.4.12.jar文件:/ Users/antonioleva/Library/Android/sdk/extras /google/m2repository/org/codehaus/groovy/groovy-all/2.4.12/groovy-all-2.4.12.pom文件:/ Users/antonioleva/Library/Android/sdk/extras/google/m2repository/org/codehaus /groovy/groovy-all/2.4.12/groovy-all-2.4.12.jar文件:/Users/antonioleva/Library/Android/sdk/extras/android/m2repository/org/codehaus/groovy/groovy-all/2.4 .12/groovy-all-2.4.12.pom文件:/Users/antonioleva/Library/Android/sdk/extras/android/m2repository/org/codehaus/groovy/groovy-all/2.4.12/groovy-all-2.4 .12.jar https://maven.google.com/org/codehaus/groovy/groovy-all/2.4.12/groovy-all-2.4.12.pom https://maven.google.com/org/codehaus /groovy/groovy-all/2.4.12/groovy-all-2.4.12.jar 必需:projec t:> com.android.tools.lint:lint-gradle:26.1.3

这是我的傻瓜:

    buildscript {
    repositories {
        jcenter()
        mavenCentral()
        maven {
            url 'https://maven.google.com/'
            name 'Google'
        }
        google()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.1.3'
    }
}
apply plugin: 'android'

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

    implementation('com.android.support:multidex:1.0.1') {
        exclude module: 'support-v4'
        exclude module: 'support-fragment'
        exclude module: 'internal_impl-23.0.1'


    }
    implementation('com.android.support:support-v4:23.0.1') {
        exclude module: 'support-v4'
        exclude module: 'support-fragment'
        exclude module: 'internal_impl-23.0.1'
    }


    implementation('com.android.support:appcompat-v7:23.0.1') {
        exclude module: 'support-v4'
        exclude …