小编Str*_*dog的帖子

我的应用程序有一个问题，当我登录时，应用程序崩溃并出现错误：

java.lang.NoSuchMethodError: No static method metafactory(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite; in class Ljava/lang/invoke/LambdaMetafactory; or its super classes (declaration of 'java.lang.invoke.LambdaMetafactory' appears in /apex/com.android.runtime/javalib/core-oj.jar)
  at okhttp3.internal.Util.<clinit>(Util.java:87)
  at okhttp3.internal.Util.skipLeadingAsciiWhitespace(Util.java:321)
  at okhttp3.HttpUrl$Builder.parse(HttpUrl.java:1313)
  at okhttp3.HttpUrl.get(HttpUrl.java:917)
  at retrofit2.Retrofit$Builder.baseUrl(Retrofit.java:492)
  at com.example.usub.Remote.RetrofitClient.getClient(RetrofitClient.java:14)
  at com.example.usub.Common.Common.getGoogleAPI(Common.java:10)
  at com.example.usub.Welcome.onCreate(Welcome.java:208)
  at android.app.Activity.performCreate(Activity.java:7825)
  at android.app.Activity.performCreate(Activity.java:7814)
  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1306)
  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245)
  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
  at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
  at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
  at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
  at android.os.Handler.dispatchMessage(Handler.java:107)
  at android.os.Looper.loop(Looper.java:214)
  at android.app.ActivityThread.main(ActivityThread.java:7356)
  at java.lang.reflect.Method.invoke(Native Method)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)

我试图弄乱 gradle 并更改变量。这个问题似乎源于这个包：

import retrofit2.Retrofit;
import retrofit2.converter.scalars.ScalarsConverterFactory;

public class RetrofitClient {
    private static Retrofit …

我正在开发一个带有侧边导航抽屉的应用程序。抽屉打开得很好，但是据称可以“单击”的文本似乎没有响应。动画显示当点击抽屉时有反馈（您可以听到声音），但没有任何结果。我试图放置 toast 消息以查看按钮是否注册了一个动作，但是按下时，没有 toast 出现。代码如下（我已经实现了NavigationView.OnNavigationItemSelectedListener）：

 protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_driver_home);
        Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        DrawerLayout drawer = findViewById(R.id.drawer_layout);
        NavigationView navigationView = findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);
        // Passing each menu ID as a set of Ids because each
        // menu should be considered as top level destinations.
        mAppBarConfiguration = new AppBarConfiguration.Builder(
                R.id.nav_home, R.id.nav_history, R.id.nav_settings,
                R.id.nav_help, R.id.nav_signout)
                .setDrawerLayout(drawer)
                .build();
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
        NavigationUI.setupWithNavController(navigationView, navController);

然后我实现了这个方法：

    @Override
    public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
        switch (menuItem.getItemId()){
            case R.id.nav_history: …