错误：正在膨胀类com.google.android.material.navigation.NavigationView
我的应用程序在API 26级或更高级别以上工作，但在API 26级以下停止工作。请帮忙。
为什么XML在膨胀类时返回错误，并在较低的API级别停止工作？
错误报告：
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
活动。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**这里我使用的是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.nn");
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);
}
}
抱歉重播延迟！该问题是由于v21文件夹中的可提取项目不可用。这就是为什么应用程序只在波纹管API-24上崩溃
我认为问题出在您的xml navview 中的这一行
app:headerLayout="@layout/nav_header_main"
拆下它，它应该可以工作了。