Question

这是我的代码：

public class SplashActivtiy extends AppCompatActivity {

    private final static int MSG_CONTINUE = 1234;
    private final static long DELAY = 2000;
    private static final String TAG = SplashActivtiy.class.getSimpleName();
    private SplashViewModel splashViewModel;
    private LifecycleRegistry mLifecycleRegistry;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_splash_activtiy);

       // FirebaseApp.initializeApp(this);

        splashViewModel = ViewModelProviders.of(this).get(SplashViewModel.class);

        splashViewModel.retrieveRemoteConfig(SplashActivtiy.this);

        mHandler.sendEmptyMessageDelayed(MSG_CONTINUE, DELAY);
    }
    @Override
    protected void onDestroy() {
        mHandler.removeMessages(MSG_CONTINUE);
        super.onDestroy();
    }


    private void _continue() {
        startActivity(new Intent(this, Swipe.class));

        finish();
    }

    private final Handler mHandler = new Handler() {
        @Override
        public void handleMessage(android.os.Message msg) {
            switch (msg.what) {
                case MSG_CONTINUE:
                    _continue();
                    break;
            }
        }
    };

}

ViewModel类：

public class SplashViewModel extends ViewModel {

    private static final String TAG = SplashViewModel.class.getSimpleName();
    FirebaseRemoteConfig mFirebaseRemoteConfig;

    public void retrieveRemoteConfig(Context context) {
        Log.d(TAG, "retrieveRemoteConfig: ");
        FirebaseApp.initializeApp(context);

        mFirebaseRemoteConfig = FirebaseRemoteConfig.getInstance();


        mFirebaseRemoteConfig.setDefaults(R.xml.remote_config_defaults);

        // cacheExpirationSeconds is set to cacheExpiration here, indicating the next fetch request
        // will use fetch data from the Remote Config service, rather than cached parameter values,
        // if cached parameter values are more than cacheExpiration seconds old.
        // See Best Practices in the README for more information.

        final FirebaseRemoteConfig finalMFirebaseRemoteConfig = mFirebaseRemoteConfig;
        mFirebaseRemoteConfig.fetch()
                .addOnCompleteListener((Executor) this, new OnCompleteListener<Void>() {
                    @Override
                    public void onComplete(@NonNull Task<Void> task) {
                        Log.d(TAG, "onComplete: ");
                        if (task.isSuccessful()) {
                            Log.d(TAG, "onComplete: Remote config fetched successfully");
                            //  Toast.makeText(SplashActivity.this, "Fetch Succeeded",Toast.LENGTH_SHORT).show();
                            // After config data is successfully fetched, it must be activated before newly fetched
                            // values are returned.
                            finalMFirebaseRemoteConfig.activateFetched();
                        } else {
                            //  Toast.makeText(SplashActivity.this, "Fetch Failed",Toast.LENGTH_SHORT).show();
                            Log.e(TAG, "onComplete: Remote config fetching unsuccessful " + task.getException());
                        }
                    }
                });
    }
}

过程：com.careerlift，PID：13620 java.lang.RuntimeException：无法启动活动ComponentInfo {com.careerlift / com.careerlift.SplashActivtiy}： java.lang.ClassCastException：com.careerlift.ViewModel.SplashViewModel 无法转换为java.util.concurrent.Executor 在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2195）在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2245）在android.app.ActivityThread.access $ 800（ActivityThread.java:135）在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1196）在android.os.Handler.dispatchMessage（Handler.java:102）在android.os.Looper.loop（Looper.java:136）在android.app.ActivityThread.main（ActivityThread.java:5021）在java.lang.reflect.Method.invokeNative（本机方法）在java.lang.reflect.Method.invoke（Method.java:515）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:827）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:643）在dalvik.system.NativeStart.main（本机方法）由以下原因引起：java.lang.ClassCastException：com.careerlift.ViewModel.SplashViewModel无法转换为 java.util.concurrent.Executor 在com.careerlift.ViewModel.SplashViewModel.retrieveRemoteConfig（SplashViewModel.java:36）在com.careerlift.SplashActivtiy.onCreate（SplashActivtiy.java:31）在android.app.Activity.performCreate（Activity.java:5397）在android.app.Instrumentation.callActivityOnCreate（Instrumentation.java:1113）在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2159）在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2245）在android.app.ActivityThread.access $ 800（ActivityThread.java:135）在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1196）在android.os.Handler.dispatchMessage（Handler.java:102）在android.os.Looper.loop（Looper.java:136）在android.app.ActivityThread.main（ActivityThread.java:5021）在java.lang.reflect.Method.invokeNative（本机方法）在java.lang.reflect.Method.invoke（Method.java:515）在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:827）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:643）在dalvik.system.NativeStart.main（本机方法）

Answer 1

使用此 .addOnCompleteListener(context, new OnCompleteListener<Void>()

代替 .addOnCompleteListener((Executor) this, new OnCompleteListener<Void>()

示例代码

final FirebaseRemoteConfig finalMFirebaseRemoteConfig = mFirebaseRemoteConfig;
    mFirebaseRemoteConfig.fetch()
            .addOnCompleteListener(context, new OnCompleteListener<Void>() {
                @Override
                public void onComplete(@NonNull Task<Void> task) {
                    Log.d(TAG, "onComplete: ");
                    if (task.isSuccessful()) {
                        Log.d(TAG, "onComplete: Remote config fetched successfully");
                        //  Toast.makeText(SplashActivity.this, "Fetch Succeeded",Toast.LENGTH_SHORT).show();
                        // After config data is successfully fetched, it must be activated before newly fetched
                        // values are returned.
                        finalMFirebaseRemoteConfig.activateFetched();
                    } else {
                        //  Toast.makeText(SplashActivity.this, "Fetch Failed",Toast.LENGTH_SHORT).show();
                        Log.e(TAG, "onComplete: Remote config fetching unsuccessful " + task.getException());
                    }
                }
            });

当使用mvvm实现启动屏幕时出现此错误

1 个答案: