Question

我正在使用Firebase开发一款适用于Android的简单社交网络应用。该应用程序的主要活动是登录屏幕。登录在运行Android 7.0（API 24）的模拟器上运行正常，但在Android 4.4（API 19）中登录时崩溃。这是Logcat：

06-29 20:32:52.428 31471-31471/com.oliviamontoya.letstradezines E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.oliviamontoya.letstradezines, PID: 31471
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.oliviamontoya.letstradezines/com.oliviamontoya.letstradezines.Main2Activity}: android.view.InflateException: Binary XML file line #16: Error inflating class android.support.design.widget.NavigationView
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2181)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2231)
    at android.app.ActivityThread.access$700(ActivityThread.java:139)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1401)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:137)
    at android.app.ActivityThread.main(ActivityThread.java:5082)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:515)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:782)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:598)
    at dalvik.system.NativeStart.main(Native Method)
 Caused by: android.view.InflateException: Binary XML file line #16: Error inflating class android.support.design.widget.NavigationView
    at android.view.LayoutInflater.createView(LayoutInflater.java:620)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:755)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:397)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:353)
    at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:289)
    at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139)
    at com.oliviamontoya.letstradezines.Main2Activity.onCreate(Main2Activity.java:54)
    at android.app.Activity.performCreate(Activity.java:5287)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2145)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2231) 
    at android.app.ActivityThread.access$700(ActivityThread.java:139) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1401) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:137) 
    at android.app.ActivityThread.main(ActivityThread.java:5082) 
    at java.lang.reflect.Method.invokeNative(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:515) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:782) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:598) 
    at dalvik.system.NativeStart.main(Native Method) 
 Caused by: java.lang.reflect.InvocationTargetException
    at java.lang.reflect.Constructor.constructNative(Native Method)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at android.view.LayoutInflater.createView(LayoutInflater.java:594)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696) 
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:755) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:397) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:353) 
    at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:289) 
    at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139) 
    at com.oliviamontoya.letstradezines.Main2Activity.onCreate(Main2Activity.java:54) 
    at android.app.Activity.performCreate(Activity.java:5287) 
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2145) 
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2231) 
    at android.app.ActivityThread.access$700(ActivityThread.java:139) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1401) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:137) 
    at android.app.ActivityThread.main(ActivityThread.java:5082) 
    at java.lang.reflect.Method.invokeNative(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:515) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:782) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:598) 
    at dalvik.system.NativeStart.main(Native Method) 
 Caused by: android.content.res.Resources$NotFoundException: Resource ID #0x7f020070
    at android.content.res.Resources.getValue(Resources.java:1163)
    at android.support.v7.widget.AppCompatDrawableManager.loadDrawableFromDelegates(AppCompatDrawableManager.java:331)
    at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:196)
    at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:189)
    at android.support.v7.content.res.AppCompatResources.getDrawable(AppCompatResources.java:100)
    at android.support.v7.view.menu.MenuItemImpl.getIcon(MenuItemImpl.java:427)
    at android.support.design.internal.NavigationMenuPresenter$NavigationMenuAdapter.prepareMenuItems(NavigationMenuPresenter.java:519)
    at android.support.design.internal.NavigationMenuPresenter$NavigationMenuAdapter.update(NavigationMenuPresenter.java:460)
    at android.support.design.internal.NavigationMenuPresenter.updateMenuView(NavigationMenuPresenter.java:117)
    at android.support.design.widget.NavigationView.inflateMenu(NavigationView.java:252)
    at android.support.design.widget.NavigationView.<init>(NavigationView.java:174)
    at android.support.design.widget.NavigationView.<init>(NavigationView.java:100)
    at java.lang.reflect.Constructor.constructNative(Native Method) 
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423) 
    at android.view.LayoutInflater.createView(LayoutInflater.java:594) 
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:696) 
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:755) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:397) 
    at android.view.LayoutInflater.inflate(LayoutInflater.java:353) 
    at android.support.v7.app.AppCompatDelegateImplV9.setContentView(AppCompatDelegateImplV9.java:289) 
    at android.support.v7.app.AppCompatActivity.setContentView(AppCompatActivity.java:139) 
    at com.oliviamontoya.letstradezines.Main2Activity.onCreate(Main2Activity.java:54) 
    at android.app.Activity.performCreate(Activity.java:5287) 
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2145) 
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2231) 
    at android.app.ActivityThread.access$700(ActivityThread.java:139) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1401) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:137) 
    at android.app.ActivityThread.main(ActivityThread.java:5082) 
    at java.lang.reflect.Method.invokeNative(Native Method) 
    at java.lang.reflect.Method.invoke(Method.java:515) 
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:782) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:598) 
    at dalvik.system.NativeStart.main(Native Method)

这是Java：

public class MainActivity extends AppCompatActivity {

    ImageView im;
    TextView tv;
    EditText email;
    EditText password;
    Button b;
    Button b2;
    private FirebaseAuth mAuth;
    private FirebaseAuth.AuthStateListener mAuthListener;
    private static final String TAG = "MainActivity";

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

        mAuth = FirebaseAuth.getInstance();
        mAuthListener = new FirebaseAuth.AuthStateListener() {
            @Override
            public void onAuthStateChanged(@NonNull FirebaseAuth firebaseAuth) {
                FirebaseUser user = firebaseAuth.getCurrentUser();
                if (user != null) {
                    // User is signed in
                    Log.d(TAG, "onAuthStateChanged:signed_in:" + user.getUid());
                } else {
                    // User is signed out
                    Log.d(TAG, "onAuthStateChanged:signed_out");
                }
                // ...
            }
        };

        im = (ImageView) findViewById(R.id.img);
        tv = (TextView) findViewById(R.id.txt);
        email = (EditText) findViewById(R.id.email);
        password = (EditText) findViewById(R.id.password);
        b = (Button) findViewById(R.id.button);
        b.setBackgroundColor(getResources().getColor(R.color.colorPrimary));
        b.setTextColor(Color.WHITE);

        b2 = (Button) findViewById(R.id.button2);
        b2.setBackgroundColor(getResources().getColor(R.color.colorPrimary));
        b2.setTextColor(Color.WHITE);
    }

    public void logIn(View view) {
        mAuth.signInWithEmailAndPassword(email.getText().toString(), password.getText().toString())
                .addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
                    @Override
                    public void onComplete(@NonNull Task<AuthResult> task) {
                        Log.d(TAG, "signInWithEmail:onComplete:" + task.isSuccessful());


                        if (!task.isSuccessful()) {
                            Log.w(TAG, "signInWithEmail:failed", task.getException());
                            Toast.makeText(MainActivity.this, "Authorization failed.",
                                    Toast.LENGTH_SHORT).show();
                        } else {
                            Intent intent = new Intent(MainActivity.this, Main2Activity.class);
                            startActivity(intent);
                        }

                        // ...
                    }
                });
    }

    public void signUp(View view) {
        Intent intent = new Intent(this, SignUp.class);
        startActivity(intent);
    }

}

这是XML：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:layout_margin="10dp"
    android:gravity="center"
    tools:context="com.oliviamontoya.letstradezines.MainActivity">
    <ScrollView
        android:layout_height="match_parent"
        android:layout_width="match_parent">
        <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:app="http://schemas.android.com/apk/res-auto"
            xmlns:tools="http://schemas.android.com/tools"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:layout_margin="10dp"
            android:gravity="center"
            tools:context="com.oliviamontoya.letstradezines.MainActivity">

            <ImageView
                android:id="@+id/img"
                android:layout_width="200dp"
                android:layout_height="200dp"
                android:src="@mipmap/ic_launcher"/>

            <TextView
                android:id="@+id/txt"
                android:layout_width="300dp"
                android:layout_height="wrap_content"
                android:padding="10dp"
                android:textSize="20sp"
                android:text="Let's Trade Zines is a social network for the zine community!" />

            <EditText
                android:id="@+id/email"
                android:layout_width="300dp"
                android:layout_height="wrap_content"
                android:gravity="center"
                android:maxLength="30"
                android:hint="Email" />

            <EditText
                android:id="@+id/password"
                android:inputType="textPassword"
                android:layout_width="300dp"
                android:layout_height="wrap_content"
                android:gravity="center"
                android:ellipsize="start"
                android:maxLength="30"
                android:hint="Password" />

            <GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
                xmlns:app="http://schemas.android.com/apk/res-auto"
                xmlns:tools="http://schemas.android.com/tools"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:columnCount="2"
                android:gravity="center"
                tools:context="com.oliviamontoya.letstradezines.MainActivity">

                <Button
                    android:id="@+id/button"
                    android:layout_height="wrap_content"
                    android:layout_width="wrap_content"
                    android:gravity="center"
                    android:padding="10dp"
                    android:layout_margin="10dp"
                    android:textSize="20sp"
                    android:onClick="logIn"
                    android:text="Log In" />

                <Button
                    android:id="@+id/button2"
                    android:layout_height="wrap_content"
                    android:layout_width="wrap_content"
                    android:gravity="center"
                    android:padding="10dp"
                    android:layout_margin="10dp"
                    android:textSize="20sp"
                    android:onClick="signUp"
                    android:text="Sign Up!" />
            </GridLayout>
        </LinearLayout>
    </ScrollView>
</LinearLayout>

当我尝试登录时，有人能告诉我为什么会崩溃吗？

编辑：这是Main2Activity的Java和XML：

public class Main2Activity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener {

    ImageView profileImg;
    TextView usernameDisplay;
    TextView openTrades;
    TextView messages;
    TextView followedFeed;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        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.setDrawerListener(toggle);
        toggle.syncState();

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

        profileImg = (ImageView) findViewById(R.id.profileImg);

        FirebaseDatabase database = FirebaseDatabase.getInstance();
        final FirebaseUser firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
        DatabaseReference databaseReference = database.getReference(firebaseUser.getUid());
        //DatabaseReference child = databaseReference.child(username.getText().toString());
        databaseReference.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(DataSnapshot dataSnapshot) {
                User user = dataSnapshot.getValue(User.class);

                if (user.profilePic.isEmpty()) {
                    profileImg.setImageResource(R.mipmap.ic_launcher);
                } else {

                    StorageReference mStorageRef = FirebaseStorage.getInstance().getReference();
                    try {
                        final File localFile = File.createTempFile("profilePic", "jpg");
                        StorageReference ref = mStorageRef.child("images/" + firebaseUser.getUid() + "ProfilePic.jpg");
                        ref.getFile(localFile)
                                .addOnSuccessListener(new OnSuccessListener<FileDownloadTask.TaskSnapshot>() {
                                    @Override
                                    public void onSuccess(FileDownloadTask.TaskSnapshot taskSnapshot) {
                                        Bitmap bMap = BitmapFactory.decodeFile(localFile.toString());
                                        profileImg.setImageBitmap(bMap);
                                    }
                                }).addOnFailureListener(new OnFailureListener() {
                            @Override
                            public void onFailure(@NonNull Exception exception) {
                                // Handle failed download
                                // ...
                            }
                        });
                    } catch(Exception e) {
                        Toast.makeText(Main2Activity.this, "Error creating file.",
                                Toast.LENGTH_SHORT).show();
                    }

                }

            }
            @Override
            public void onCancelled(DatabaseError databaseError) {

            }
        });

        usernameDisplay = (TextView) findViewById(R.id.usernameDisplay);
        FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
        if (user != null) {
            String name = user.getDisplayName();
            usernameDisplay.setText(name);
        }

        openTrades = (TextView) findViewById(R.id.openTrades);
        openTrades.setBackgroundColor(getResources().getColor(R.color.colorPrimary));
        openTrades.setTextColor(Color.WHITE);
        messages = (TextView) findViewById(R.id.messages);
        messages.setBackgroundColor(getResources().getColor(R.color.colorPrimary));
        messages.setTextColor(Color.WHITE);
        followedFeed = (TextView) findViewById(R.id.followedFeed);
        followedFeed.setBackgroundColor(getResources().getColor(R.color.colorPrimary));
        followedFeed.setTextColor(Color.WHITE);
    }

    @Override
    public void onBackPressed() {
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) {
            drawer.closeDrawer(GravityCompat.START);
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main2, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) {
        // Handle navigation view item clicks here.
        int id = item.getItemId();

        if (id == R.id.nav_profile) {
            Intent intent = new Intent(this, Profile.class);
            startActivity(intent);
        } else if (id == R.id.nav_trades) {

        } else if (id == R.id.nav_messages) {
            Intent intent = new Intent(this, Messages.class);
            startActivity(intent);
        } else if (id == R.id.nav_followFeed) {

        } else if (id == R.id.nav_search) {
            Intent intent = new Intent(this, Search.class);
            startActivity(intent);
        } else if (id == R.id.nav_logOut) {
            FirebaseAuth.getInstance().signOut();
            finish();
        } else if (id == R.id.nav_share) {

        } else if (id == R.id.nav_send) {

        }

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    }
}

activity_main2.xml：

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    tools:openDrawer="start">

    <include
        layout="@layout/app_bar_main2"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <android.support.design.widget.NavigationView
        android:id="@+id/nav_view"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:fitsSystemWindows="true"
        app:headerLayout="@layout/nav_header_main2"
        app:menu="@menu/activity_main2_drawer" />

</android.support.v4.widget.DrawerLayout>

content_main2.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:gravity="center"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    tools:context="com.oliviamontoya.letstradezines.Main2Activity"
    tools:showIn="@layout/app_bar_main2">

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:app="http://schemas.android.com/apk/res-auto"
            xmlns:tools="http://schemas.android.com/tools"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_margin="10dp"
            android:orientation="vertical"
            android:gravity="center"
            app:layout_behavior="@string/appbar_scrolling_view_behavior"
            tools:context="com.oliviamontoya.letstradezines.Main2Activity"
            tools:showIn="@layout/app_bar_main2">

            <ImageView
                android:id="@+id/profileImg"
                android:layout_width="150dp"
                android:layout_height="150dp"
                android:gravity="center" />

            <TextView
                android:id="@+id/usernameDisplay"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textSize="25dp"
                android:gravity="center"
                android:layout_margin="10dp" />

            <TextView
                android:id="@+id/openTrades"
                android:layout_width="match_parent"
                android:layout_height="200dp"
                android:padding="10dp"
                android:layout_margin="10dp"
                android:textSize="20sp"
                android:gravity="center"
                android:text="This is where open trades will go." />

            <TextView
                android:id="@+id/messages"
                android:layout_width="match_parent"
                android:layout_height="200dp"
                android:padding="10dp"
                android:layout_margin="10dp"
                android:textSize="20sp"
                android:gravity="center"
                android:text="This is where messages will go." />

            <TextView
                android:id="@+id/followedFeed"
                android:layout_width="match_parent"
                android:layout_height="200dp"
                android:padding="10dp"
                android:layout_margin="10dp"
                android:textSize="20sp"
                android:gravity="center"
                android:text="This is where followed feed will go." />

        </LinearLayout>
    </ScrollView>
</LinearLayout>

app_bar_main2.xml和main2.xml是在我添加导航抽屉活动时从我给出的内容中未编辑的。 activity_main2_drawer.xml和nav_header_main2.xml与给我的文本和图标的一些编辑很接近，但我不能在这里完全适合它们。

Answer 1

根据logcat，很明显在给班级充气时出现错误＆＃34;导航视图＆＃34;。

导航视图类在api级别22.2.0中添加，因此它不会在低于该级别的api级别中工作...

我建议您不要使用＆＃34;导航视图＆＃34;如果你正在使用api级别低于api级别22.

希望这会有所帮助。

Answer 2

我终于找到了问题所在。答案是接受的答案：Android KitKat: android.view.InflateException: Error inflating class android.support.design.widget.NavigationView

在运行Android 7.0（API 24）的模拟器中运行的Android应用程序在运行Android 4.4（API 19）的手机中崩溃

2 个答案: