錯誤：充氣 class com.google.android.material.navigation.NavigationView

Question

錯誤：充氣 class com.google.android.material.navigation.NavigationView

我的應用程序在 API 26 級或更高級別上工作，但在 API 26 級以下停止工作。請幫助。

為什么 XML 在充氣 class 時返回錯誤，並在較低的 API 級別停止工作？

錯誤報告：

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.silverfoxsoft.concretepumpandconstructioncalculator/com.silverfoxsoft.concretepumpandconstructioncalculator.MainActivity}: android.view.InflateException: Binary XML file line #17: Error inflating class com.google.android.material.navigation.NavigationView
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2298)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2360)
        at android.app.ActivityThread.access$800(ActivityThread.java:144)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1278)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5221)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:899)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
     Caused by: android.view.InflateException: Binary XML file line #17: Error inflating class com.google.android.material.navigation.NavigationView

活動.main

<?xml version="1.0" encoding="utf-8"?>
<androidx.drawerlayout.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_main"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <com.google.android.material.navigation.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_main"
        app:menu="@menu/activity_main_drawer"
        app:backgroundTint="@color/dark_bg_color"
        app:itemTextColor="#79847A"/>

</androidx.drawerlayout.widget.DrawerLayout>

**ActivityMain.java ** 這里我使用的是 XML 文件

package com.silverfoxsoft.concretepumpandconstructioncalculator;

import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.content.Intent;
import android.os.Build;
import android.os.Bundle;

import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.android.material.snackbar.Snackbar;

import android.view.MenuItem;
import android.view.View;

import androidx.annotation.NonNull;
import androidx.navigation.NavController;
import androidx.navigation.Navigation;
import androidx.navigation.ui.AppBarConfiguration;
import androidx.navigation.ui.NavigationUI;

import com.google.android.material.navigation.NavigationView;
import com.google.firebase.messaging.FirebaseMessaging;

import androidx.drawerlayout.widget.DrawerLayout;

import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;

import android.view.Menu;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    private long backPressedTime;
    private AppBarConfiguration mAppBarConfiguration;

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

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            NotificationChannel channel =
                    new NotificationChannel("Mynotification", "MyNotification", NotificationManager.IMPORTANCE_DEFAULT);
            NotificationManager manager = getSystemService(NotificationManager.class);
            assert manager != null;
            manager.createNotificationChannel(channel);
        }

        FirebaseMessaging.getInstance().subscribeToTopic("general")
                .addOnCompleteListener(new OnCompleteListener<Void>() {
                    @Override
                    public void onComplete(@NonNull Task<Void> task) {
                        String msg = "Connected to Firebase!";
                        if (!task.isSuccessful()) {
                            msg = "Failed";
                        }
                        //Log.d(TAG, msg);
                        Toast.makeText(MainActivity.this, msg, Toast.LENGTH_SHORT).show();
                    }
                });

        Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        FloatingActionButton fab = findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Snackbar.make(view, "Email your feedback or suggestion", Snackbar.LENGTH_LONG)
                        .setAction("Action", null).show();
                Toast.makeText(MainActivity.this,
                        "Select Email option only!", Toast.LENGTH_LONG).show();
                //Thread.sleep(2000);
                Intent email = new Intent(Intent.ACTION_SEND);
                email.setType("plain/text");
                String[] address = {"silverfoxsofts@gmail.com"};

                email.putExtra(Intent.EXTRA_EMAIL, address);
                email.putExtra(Intent.EXTRA_SUBJECT, "Feed Back/Suggestion for MIXO - Construction Manager App");
                email.putExtra(Intent.EXTRA_TEXT, "\nType your feedback or suggestion here.\n\n");
                startActivity(email);
            }
        });
        DrawerLayout drawer = findViewById(R.id.drawer_layout);
        NavigationView navigationView = findViewById(R.id.nav_view);
        // 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_gallery, R.id.nav_slideshow,
                R.id.nav_tools, R.id.nav_share, R.id.nav_send)
                .setDrawerLayout(drawer)
                .build();
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        NavigationUI.setupActionBarWithNavController(this, navController, mAppBarConfiguration);
        NavigationUI.setupWithNavController(navigationView, navController);
    }

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

    @Override
    public boolean onSupportNavigateUp() {
        NavController navController = Navigation.findNavController(this, R.id.nav_host_fragment);
        return NavigationUI.navigateUp(navController, mAppBarConfiguration)
                || super.onSupportNavigateUp();
    }

    @Override
    public void onBackPressed() {
        if(backPressedTime + 2000 > System.currentTimeMillis()) {
            super.onBackPressed();
        } else {
            Toast.makeText(MainActivity.this,
                    "Press back again to exit", Toast.LENGTH_LONG).show();
        }
        backPressedTime = System.currentTimeMillis();
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()){
            case R.id.action_settings:
                Toast.makeText(MainActivity.this,
                        "Privacy Policy", Toast.LENGTH_LONG).show();
                Intent intent = new Intent(MainActivity.this, Privacy_Policy.class);
                startActivity(intent);
        }
        return super.onOptionsItemSelected(item);
    }
}

Answer 1

我認為問題出在您的 xml navview 中的這一行

 app:headerLayout="@layout/nav_header_main"

你可以刪除它並檢查它是否有效？

Answer 2

抱歉重播晚了。 該問題是由於 v21 文件夾中的可繪制項目不可用。 這就是為什么應用程序僅在以下 API-24 上崩潰的原因