Question

public class Drawer extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener {

    private TextView textView1, textView2;
    private ImageView imageView;
    private FirebaseAuth mAuth;
    private FirebaseAuth.AuthStateListener authListener;

    @Override
    protected void onStart() {
        super.onStart();
        mAuth.addAuthStateListener(authListener);
    }

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

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
            }
        });

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawer.addDrawerListener(toggle);
        toggle.syncState();


        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);

        View headerView = navigationView.getHeaderView(0);
        //navigationView.addHeaderView(headerView);

        textView1 = (TextView) headerView.findViewById(R.id.textview);
        textView2 = (TextView) headerView.findViewById(R.id.textview1);
        imageView = (ImageView)headerView. findViewById(R.id.imageview);
        Bundle bundle = getIntent().getExtras();
        String Name = bundle.getString("name");
        String Email = bundle.getString("email");
        String photo = bundle.getString("photo");
        Log.d("TAG", "name" + Name);
        Log.d("TAG1", "email" + Email);
        Log.d("TAG2", "photo" + photo);

        Glide.with(this).load(photo).into(imageView);

        textView1.setText(Name);
        textView2.setText(Email);


        mAuth = FirebaseAuth.getInstance();
        authListener = new FirebaseAuth.AuthStateListener() {
            @Override
            public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
                if (firebaseAuth.getCurrentUser() == null) {
                    startActivity(new Intent(Drawer.this, MainActivity.class));
                }
            }
        };
    }

这是我的错误 - 我该如何解决？

08-25 14：13：42.154 31382-31382 / com.example.arun.logintest E / AndroidRuntime：致命异常：主要处理：com.example.arun.logintest，PID：31382 java.lang.RuntimeException：无法启动活动 ComponentInfo {com.example.arun.logintest / com.example.arun.logintest.Drawer}： java.lang.IllegalArgumentException：您必须传入非null视图在 android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2560）在 android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2626）在android.app.ActivityThread.-wrap11（ActivityThread.java）在 android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1475）在android.os.Handler.dispatchMessage（Handler.java:111）在android.os.Looper.loop（Looper.java:207）在android.app.ActivityThread.main（ActivityThread.java:5740） at java.lang.reflect.Method.invoke（Native Method）在 com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:905）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:766）引起：java.lang.IllegalArgumentException：您必须传入非 null查看在 com.bumptech.glide.GenericRequestBuilder.into（GenericRequestBuilder.java:678）在 com.bumptech.glide.DrawableRequestBuilder.into（DrawableRequestBuilder.java:448）在com.example.arun.logintest.Drawer.onCreate（Drawer.java:81）在android.app.Activity.performCreate（Activity.java:6543）在 android.app.Instrumentation.callActivityOnCreate（Instrumentation.java:1113）在 android.app.ActivityThread.performLaunchActivity（ActivityThread.java:2513）在 android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:2626）在android.app.ActivityThread.-wrap11（ActivityThread.java）在 android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1475）在android.os.Handler.dispatchMessage（Handler.java:111）在android.os.Looper.loop（Looper.java:207）在android.app.ActivityThread.main（ActivityThread.java:5740） at java.lang.reflect.Method.invoke（Native Method）在 com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit.java:905）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:766)08-25 14：13：43.809 31382-31382 / com.example.arun.logintest I / Process：发送信号。 PID：31382 SIG：9

Answer 1

您可以通过inflateHeaderView方法查找标题布局来执行另一项操作。

NavigationView navigationView = (NavigationView) findViewById(R.id.navigationViewId);
View headerView = navigationView.inflateHeaderView(R.layout.nav_header);
textView1 = (TextView) headerView.findViewById(R.id.textview);
textView2 = (TextView) headerView.findViewById(R.id.textview1);
imageView = (ImageView)headerView. findViewById(R.id.imageview);

您现在可以从布局文件中删除app:headerLayout="@layout/nav_header"。

无法在导航标题

1 个答案: