Android Studio语法错误

时间:2018-06-19 16:07:26

标签: java android android-studio game-physics cradle

我刚刚开始学习Android应用开发,现在我将为初学者创建一个简单的应用。

我遵循了YouTube上的教程,但是我不知道为什么在尝试运行我的应用程序时会出现一些错误。它说他们期望一个;,)等。我试图查看我的代码,并确保每一个(都有)和每行都有;

但是该列表在扩大,我不知道实际上是什么错误。

package org.kosmik.infokosmik;

import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.BottomNavigationView;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.view.MenuItem;
import android.widget.FrameLayout;

public class MainActivity extends AppCompatActivity {

private BottomNavigationView mMenuUtama;
private FrameLayout mFrameUtama;

private berandaFragment berandaFragment;
private beritaFragment beritaFragment;
private radioFragment radioFragment;
private kegiatanFragment kegiatanFragment;

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

    mFrameUtama = (FrameLayout) findViewById(R.id.frame_utama);
    mMenuUtama = (BottomNavigationView) findViewById((R.id.menu));

    berandaFragment = new berandaFragment();
    beritaFragment = new beritaFragment();
    radioFragment = new radioFragment();
    kegiatanFragment = new kegiatanFragment();

    mMenuUtama.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                switch (item.getItemId())) {

                    case R.id.menu_beranda :
                        setFragment(berandaFragment);
                        return true;

                    case R.id.menu_berita :
                        setFragment(beritaFragment);
                        return true;

                    case R.id.menu_radio :
                        setFragment(radioFragment);
                        return true;

                    case R.id.menu_kegiatan :
                        setFragment(kegiatanFragment);
                        return true;

                    default:
                        return false;
                }
        }
    }
}

public void setFragment(Fragment fragment) {
    FragmentTransaction fragmentTransaction = getSupportFragmentManager().beginTransaction();
    fragmentTransaction.replace(R.id.frame_utama, fragment);
    fragmentTransaction.commit();
};}

这是我在MainActivity.java上的代码。无论如何,如果您能回答并解释它,我将不胜感激。

1 个答案:

答案 0 :(得分:1)

亲爱的您启动了一个名为setOnNavigationItemSelectedListener的方法括号,但从未关闭,请按如下所示关闭方法括号:

default:
       return false;
     }
   }
 });
}


public void setFragment(Fragment fragment) {
    FragmentTransaction fragmentTransaction = 
    getSupportFragmentManager().beginTransaction();
    fragmentTransaction.replace(R.id.frame_utama, fragment);
    fragmentTransaction.commit();
}