单击按钮后，我的应用程序中的一个活动会创建第二个活动。启动第二个活动的代码是这样的：
Button addAlarmButton = findViewById(R.id.addAlarmButton);
addAlarmButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(getApplicationContext(), Activity_AddAlarm.class);
startActivity(intent);
}
});
该应用程序目前不完整。第二个活动有一个片段持有者，我以编程方式放置片段。（我将编写代码以添加更多片段。）
public class Activity_AddAlarm extends AppCompatActivity {
private static FragmentManager fragmentManager;
private static ActionBar actionBar;
private static final String BACK_STACK_TAG = "addAlarmActivity_fragment_stack";
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_alarm);
setSupportActionBar((Toolbar) findViewById(R.id.toolbar2));
actionBar = getSupportActionBar();
assert actionBar != null;
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.addAlarmActFragHolder, new Fragment_AddAlarmActivity_AddAlarm())
.addToBackStack(BACK_STACK_TAG)
.commit();
fragmentManager.executePendingTransactions();
}
@Override
public void onBackPressed() {
goBack();
}
private void goBack() {
if (fragmentManager.getBackStackEntryCount() > 1) {
fragmentManager.popBackStackImmediate();
} else {
NavUtils.navigateUpFromSameTask(this);
}
}
}
片段类如下所示：
public class Fragment_AddAlarmActivity_AddAlarm extends Fragment {
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.frag_add_alarm_act_add_alarm, container, false);
}
}
一旦我单击第一个活动中的按钮，onCreateView(...)片段类中的方法就会引发异常：
2020-07-19 01:15:13.315 9853-9853/in.basulabs.shakealarmclock E/TypefaceCompatApi26Impl: Unable to collect necessary methods for class java.lang.NoSuchMethodException
java.lang.NoSuchMethodException: android.graphics.FontFamily.<init> []
at java.lang.Class.getConstructor0(Class.java:2332)
at java.lang.Class.getConstructor(Class.java:1728)
at androidx.core.graphics.TypefaceCompatApi26Impl.obtainFontFamilyCtor(TypefaceCompatApi26Impl.java:321)
at androidx.core.graphics.TypefaceCompatApi26Impl.<init>(TypefaceCompatApi26Impl.java:84)
at androidx.core.graphics.TypefaceCompatApi28Impl.<init>(TypefaceCompatApi28Impl.java:36)
at androidx.core.graphics.TypefaceCompat.<clinit>(TypefaceCompat.java:47)
at androidx.core.graphics.TypefaceCompat.create(TypefaceCompat.java:190)
at androidx.appcompat.widget.AppCompatTextView.setTypeface(AppCompatTextView.java:705)
at android.widget.TextView.resolveStyleAndSetTypeface(TextView.java:2183)
at android.widget.TextView.setTypefaceFromAttrs(TextView.java:2154)
at android.widget.TextView.applyTextAppearance(TextView.java:4105)
at android.widget.TextView.<init>(TextView.java:1630)
at android.widget.TextView.<init>(TextView.java:990)
at androidx.appcompat.widget.AppCompatTextView.<init>(AppCompatTextView.java:99)
at androidx.appcompat.widget.AppCompatTextView.<init>(AppCompatTextView.java:95)
at androidx.appcompat.app.AppCompatViewInflater.createTextView(AppCompatViewInflater.java:182)
at androidx.appcompat.app.AppCompatViewInflater.createView(AppCompatViewInflater.java:103)
at androidx.appcompat.app.AppCompatDelegateImpl.createView(AppCompatDelegateImpl.java:1407)
at androidx.appcompat.app.AppCompatDelegateImpl.onCreateView(AppCompatDelegateImpl.java:1457)
at android.view.LayoutInflater$FactoryMerger.onCreateView(LayoutInflater.java:240)
at android.view.LayoutInflater.tryCreateView(LayoutInflater.java:1059)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:995)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:959)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:1121)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1082)
at android.view.LayoutInflater.parseInclude(LayoutInflater.java:1261)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:1117)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1082)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:1124)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1082)
at android.view.LayoutInflater.inflate(LayoutInflater.java:680)
at android.view.LayoutInflater.inflate(LayoutInflater.java:532)
at in.basulabs.shakealarmclock.Fragment_AddAlarmActivity_AddAlarm.onCreateView(Fragment_AddAlarmActivity_AddAlarm.java:17)
at androidx.fragment.app.Fragment.performCreateView(Fragment.java:2600)
at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java:881)
at androidx.fragment.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManagerImpl.java:1238)
at androidx.fragment.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java:1303)
at androidx.fragment.app.FragmentManagerImpl.dispatchStateChange(FragmentManagerImpl.java:2659)
at androidx.fragment.app.FragmentManagerImpl.dispatchActivityCreated(FragmentManagerImpl.java:2613)
at androidx.fragment.app.FragmentController.dispatchActivityCreated(FragmentController.java:246)
at androidx.fragment.app.FragmentActivity.onStart(FragmentActivity.java:542)
at androidx.appcompat.app.AppCompatActivity.onStart(AppCompatActivity.java:201)
at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1435)
at android.app.Activity.performStart(Activity.java:8008)
at android.app.ActivityThread.handleStartActivity(ActivityThread.java:3382)
at android.app.servertransaction.TransactionExecutor.performLifecycleSequence(TransactionExecutor.java:221)
at android.app.servertransaction.TransactionExecutor.cycleToPath(TransactionExecutor.java:201)
2020-07-19 01:15:13.315 9853-9853/in.basulabs.shakealarmclock E/TypefaceCompatApi26Impl: at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:173)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2049)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:223)
at android.app.ActivityThread.main(ActivityThread.java:7523)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:941)
请注意，片段已正确加载，当我按下后退/向上按钮时，我可以毫无问题地返回上一个活动。
我更改了片段布局文件，以使用<include layout="@layout/..."/>标签将其包含在第二个活动的片段持有者中，而不是以编程方式添加片段。现在我在第二个活动中得到了一个异常setContentView(...)，堆栈跟踪与上面完全相同，唯一的变化是现在它显示了onCreate(...)活动中的方法而不是onCreateView(...)片段中的方法。
我在运行 Google APIs x86 Intel Atom 系统映像的模拟器上运行此应用程序。SDK 工具版本为 30.0.1。
请注意，如果我在 API 25 模拟器上运行应用程序，我不会收到此错误。
这是 Android 11 平台中的错误吗？
我可以根据要求提供片段布局文件；我现在不包括它，因为它太大了。
模块级别的依赖关系build.gradle如下：
dependencies {
implementation fileTree(dir: "libs", include: ["*.jar"])
implementation 'androidx.appcompat:appcompat:1.1.0'
implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
implementation 'androidx.gridlayout:gridlayout:1.0.0'
implementation 'androidx.cardview:cardview:1.0.0'
implementation 'androidx.recyclerview:recyclerview:1.1.0'
implementation 'com.google.android.material:material:1.1.0'
testImplementation 'junit:junit:4.13'
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}