Logcat Error: App Crashes and does not run. Error at setContentView as per Logcat
Logcat Error: App Crashes and does not run. Error at setContentView as per Logcat
我正在开发一个基本的方程式平衡应用程序，并且是 android 开发人员的新手。该应用根本不 运行 phone。我之前有一个启动画面作为启动器，它曾经弹出，之后应用程序将关闭。我删除了启动画面，现在应用程序无法打开。我猜 MainActivity 中有一个错误（启动画面曾经是它的意图，现在它是启动器 activity）。但是在 运行 与 ADB 仿真一起使用 logcat 时，它在 MainActivity 的 onCreate 方法中显示错误。 logcat 中还有一些错误，但我不知道它们是什么意思（我想唯一重要的错误是带有蓝色下划线的 onCreate 错误）。请帮忙。
MainActivity.java
public class MainActivity extends AppCompatActivity implements DialogCloseListener {
private RecyclerView taskRecyclerView;
private EqBalAdapter tasksAdapter;
private List<EqBalModel> taskList;
private DatabaseHandler db;
private FloatingActionButton fab;
private FloatingActionButton fab2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ActionBar bar = getActionBar();
bar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#00d024")));
BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.nav_bottom);
navigation.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()) {
case R.id.nav_home:
break;
case R.id.nav_aboutus:
Intent a = new Intent(MainActivity.this, AboutUs.class);
startActivity(a);
break;
case R.id.nav_help:
Intent b = new Intent(MainActivity.this,HelpGuide.class);
startActivity(b);
break;
}
return false;
}
});
db = new DatabaseHandler(this);
db.openDatabase();
taskList = new ArrayList<>();
taskRecyclerView = findViewById(R.id.reacRecyclerView);
taskRecyclerView.setLayoutManager(new LinearLayoutManager(this));
tasksAdapter = new EqBalAdapter(db, this);
taskRecyclerView.setAdapter(tasksAdapter);
fab = findViewById(R.id.fab);
ItemTouchHelper itemTouchHelper = new
ItemTouchHelper(new RecyclerItemTouchHelper(tasksAdapter));
itemTouchHelper.attachToRecyclerView(taskRecyclerView);
taskList = db.getAllTasks();
Collections.reverse(taskList);
tasksAdapter.setTasks(taskList);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
AddNewTask.newInstance().show(getSupportFragmentManager(), AddNewTask.TAG);
}
});
fab2=findViewById(R.id.newactivity);
ItemTouchHelper itemTouchHelper2 = new
ItemTouchHelper(new RecyclerItemTouchHelper(tasksAdapter));
itemTouchHelper2.attachToRecyclerView(taskRecyclerView);
fab2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent2 = new Intent(MainActivity.this, eleView.class);
startActivity(intent2);
}
});
}
@Override
public void handleDialogClose(DialogInterface dialog) {
taskList = db.getAllTasks();
Collections.reverse(taskList);
tasksAdapter.setTasks(taskList);
tasksAdapter.notifyDataSetChanged();
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="match_parent"
android:layout_width="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<TextView
android:id="@+id/ReactantText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:layout_marginBottom="16dp"
android:text="Equation Balancer"
android:textColor="@android:color/black"
android:textSize="32dp"
android:textStyle="bold" />
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/reacRecyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@id/ReactantText"
android:nestedScrollingEnabled="true"/>
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:layout_marginStart="32dp"
android:layout_marginTop="32dp"
android:layout_marginEnd="32dp"
android:layout_marginBottom="183dp"
android:backgroundTint="@android:color/holo_green_dark"
android:src="@drawable/ic_baseline_add" />
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="@+id/newactivity"
android:layout_width="86dp"
android:layout_height="82dp"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:layout_marginStart="56dp"
android:layout_marginTop="56dp"
android:layout_marginEnd="34dp"
android:layout_marginBottom="97dp"
android:backgroundTint="@android:color/holo_green_dark"
android:src="@drawable/ic_baseline_elements" />
<com.google.android.material.bottomnavigation.BottomNavigationView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/nav_bottom"
android:layout_alignParentBottom="true"
app:itemTextColor="@android:color/black"
app:menu="@menu/drawer_view" />
</RelativeLayout>
AndroidMainfest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.chemicalequationbalancer">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.ChemicalEquationBalancer">
<activity android:name="com.example.chemicalequationbalancer.AboutUs" android:theme="@style/ThemeOverlay.AppCompat.ActionBar"/>
<activity android:name="com.example.chemicalequationbalancer.HelpGuide" android:theme="@style/ThemeOverlay.AppCompat.ActionBar"/>
<activity android:name="com.example.chemicalequationbalancer.eleView" android:theme="@style/ThemeOverlay.AppCompat.ActionBar"/>
<activity
android:name="com.example.chemicalequationbalancer.MainActivity"
android:label="@string/app_name"
android:theme="@style/Theme.ChemicalEquationBalancer.ActionBar" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
build.gradle(应用程序):
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.chemicalequationbalancer">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.ChemicalEquationBalancer">
<activity android:name="com.example.chemicalequationbalancer.AboutUs" android:theme="@style/ThemeOverlay.AppCompat.ActionBar"/>
<activity android:name="com.example.chemicalequationbalancer.HelpGuide" android:theme="@style/ThemeOverlay.AppCompat.ActionBar"/>
<activity android:name="com.example.chemicalequationbalancer.eleView" android:theme="@style/ThemeOverlay.AppCompat.ActionBar"/>
<activity
android:name="com.example.chemicalequationbalancer.MainActivity"
android:label="@string/app_name"
android:theme="@style/Theme.ChemicalEquationBalancer.ActionBar" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Logcat
这是 logcat 中带下划线的行：com.example.chemicalequationbalancer.MainActivity.onCreate(MainActivity.java:51)
2021-02-16 02:07:50.712 13502-13502/com.example.chemicalequationbalancer E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.chemicalequationbalancer, PID: 13502
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.chemicalequationbalancer/com.example.chemicalequationbalancer.MainActivity}: android.view.InflateException: Binary XML file line #31: Binary XML file line #31: Error inflating class com.android.internal.widget.ActionBarContainer
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3197)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3334)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:113)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:71)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2025)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:226)
at android.app.ActivityThread.main(ActivityThread.java:7191)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:499)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:942)
Caused by: android.view.InflateException: Binary XML file line #31: Binary XML file line #31: Error inflating class com.android.internal.widget.ActionBarContainer
Caused by: android.view.InflateException: Binary XML file line #31: Error inflating class com.android.internal.widget.ActionBarContainer
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:343)
at android.view.LayoutInflater.createView(LayoutInflater.java:652)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:817)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:740)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:890)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:851)
at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at com.android.internal.policy.DecorView.onResourcesLoaded(DecorView.java:2239)
at com.android.internal.policy.PhoneWindow.generateLayout(PhoneWindow.java:2761)
at com.android.internal.policy.PhoneWindow.installDecor(PhoneWindow.java:2868)
at com.android.internal.policy.PhoneWindow.getDecorView(PhoneWindow.java:2133)
at androidx.appcompat.app.AppCompatActivity.initViewTreeOwners(AppCompatActivity.java:198)
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:173)
at **com.example.chemicalequationbalancer.MainActivity.onCreate(MainActivity.java:51)**
at android.app.Activity.performCreate(Activity.java:7376)
at android.app.Activity.performCreate(Activity.java:7367)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3177)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3334)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:113)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:71)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2025)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:226)
at android.app.ActivityThread.main(ActivityThread.java:7191)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:499)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:942)
2021-02-16 02:07:50.714 13502-13502/com.example.chemicalequationbalancer E/AndroidRuntime: Caused by: java.lang.UnsupportedOperationException: Failed to resolve attribute at index 13: TypedValue{t=0x2/d=0x1010433 a=1}
at android.content.res.TypedArray.getDrawableForDensity(TypedArray.java:946)
at android.content.res.TypedArray.getDrawable(TypedArray.java:930)
at android.view.View.<init>(View.java:5108)
at android.view.ViewGroup.<init>(ViewGroup.java:665)
at android.widget.FrameLayout.<init>(FrameLayout.java:92)
at android.widget.FrameLayout.<init>(FrameLayout.java:87)
at android.widget.FrameLayout.<init>(FrameLayout.java:82)
at com.android.internal.widget.ActionBarContainer.<init>(ActionBarContainer.java:61)
... 32 more
如果需要任何其他文件，我准备提供。我只想知道发生了什么并解决它。谢谢！
PS: Which of these is the folder which actually gets converted to apk? Is it main folder, the chemicalequationbalancer?
编辑：
themes.xml
<resources xmlns:tools="http://schemas.android.com/tools">
<!-- Base application theme. -->
<style name="Theme.ChemicalEquationBalancer" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
<!-- Primary brand color. -->
<item name="colorPrimary">@color/purple_500</item>
<item name="colorPrimaryVariant">@android:color/transparent</item>
<item name="colorOnPrimary">@color/white</item>
<!-- Secondary brand color. -->
<item name="colorSecondary">@color/teal_200</item>
<item name="colorSecondaryVariant">@color/teal_700</item>
<item name="colorOnSecondary">@color/black</item>
<!-- Status bar color. -->
<item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
<!-- Customize your theme here. -->
</style>
<style name="Theme.ChemicalEquationBalancer.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
<style name="Theme.ChemicalEquationBalancer.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
<style name="Theme.ChemicalEquationBalancer.ActionBar" parent="ThemeOverlay.AppCompat.Dark.ActionBar">
<item name="windowActionBar">true</item>
<item name="windowNoTitle">false</item>
</style>
<style name="Theme.ChemicalEquationBalancer.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
<style name="DialogStyle" parent="Theme.Design.BottomSheetDialog">
<item name="android:windowIsFloating">false</item>
<item name="android:statusBarColor">@android:color/transparent</item>
<item name="android:windowSoftInputMode">adjustResize</item>
</style>
</resources>
您的 MainActivity 正在扩展 AppCompatActivity，这意味着它继承了默认操作栏。
ThemeOverlay.AppCompat(parent for
Theme.ChemicalEquationBalancer.ActionBar) is used to override (or
“overlay”) that theme for specific views, especially the Toolbar.
如果您想自定义此 ActionBar（您可能正在这样做），请在 activity 的清单中添加一个 NoActionBar 主题，然后为您的 activity 提供一个工具栏布局。
<activity
android:name="com.example.chemicalequationbalancer.MainActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.Light.NoActionBar" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
在您的 activity_main.xml 中，您可以添加任何您想要的主题
<androidx.appcompat.widget.Toolbar
...
android:background="?attr/colorPrimary"
android:theme="@style/Theme.ChemicalEquationBalancer.ActionBar />
并且不在清单文件中
我正在开发一个基本的方程式平衡应用程序，并且是 android 开发人员的新手。该应用根本不 运行 phone。我之前有一个启动画面作为启动器，它曾经弹出，之后应用程序将关闭。我删除了启动画面，现在应用程序无法打开。我猜 MainActivity 中有一个错误（启动画面曾经是它的意图，现在它是启动器 activity）。但是在 运行 与 ADB 仿真一起使用 logcat 时，它在 MainActivity 的 onCreate 方法中显示错误。 logcat 中还有一些错误，但我不知道它们是什么意思（我想唯一重要的错误是带有蓝色下划线的 onCreate 错误）。请帮忙。
MainActivity.java
public class MainActivity extends AppCompatActivity implements DialogCloseListener {
private RecyclerView taskRecyclerView;
private EqBalAdapter tasksAdapter;
private List<EqBalModel> taskList;
private DatabaseHandler db;
private FloatingActionButton fab;
private FloatingActionButton fab2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ActionBar bar = getActionBar();
bar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#00d024")));
BottomNavigationView navigation = (BottomNavigationView) findViewById(R.id.nav_bottom);
navigation.setOnNavigationItemSelectedListener(new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
switch (item.getItemId()) {
case R.id.nav_home:
break;
case R.id.nav_aboutus:
Intent a = new Intent(MainActivity.this, AboutUs.class);
startActivity(a);
break;
case R.id.nav_help:
Intent b = new Intent(MainActivity.this,HelpGuide.class);
startActivity(b);
break;
}
return false;
}
});
db = new DatabaseHandler(this);
db.openDatabase();
taskList = new ArrayList<>();
taskRecyclerView = findViewById(R.id.reacRecyclerView);
taskRecyclerView.setLayoutManager(new LinearLayoutManager(this));
tasksAdapter = new EqBalAdapter(db, this);
taskRecyclerView.setAdapter(tasksAdapter);
fab = findViewById(R.id.fab);
ItemTouchHelper itemTouchHelper = new
ItemTouchHelper(new RecyclerItemTouchHelper(tasksAdapter));
itemTouchHelper.attachToRecyclerView(taskRecyclerView);
taskList = db.getAllTasks();
Collections.reverse(taskList);
tasksAdapter.setTasks(taskList);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
AddNewTask.newInstance().show(getSupportFragmentManager(), AddNewTask.TAG);
}
});
fab2=findViewById(R.id.newactivity);
ItemTouchHelper itemTouchHelper2 = new
ItemTouchHelper(new RecyclerItemTouchHelper(tasksAdapter));
itemTouchHelper2.attachToRecyclerView(taskRecyclerView);
fab2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent2 = new Intent(MainActivity.this, eleView.class);
startActivity(intent2);
}
});
}
@Override
public void handleDialogClose(DialogInterface dialog) {
taskList = db.getAllTasks();
Collections.reverse(taskList);
tasksAdapter.setTasks(taskList);
tasksAdapter.notifyDataSetChanged();
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="match_parent"
android:layout_width="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<TextView
android:id="@+id/ReactantText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:layout_marginBottom="16dp"
android:text="Equation Balancer"
android:textColor="@android:color/black"
android:textSize="32dp"
android:textStyle="bold" />
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/reacRecyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@id/ReactantText"
android:nestedScrollingEnabled="true"/>
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="@+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:layout_marginStart="32dp"
android:layout_marginTop="32dp"
android:layout_marginEnd="32dp"
android:layout_marginBottom="183dp"
android:backgroundTint="@android:color/holo_green_dark"
android:src="@drawable/ic_baseline_add" />
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="@+id/newactivity"
android:layout_width="86dp"
android:layout_height="82dp"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:layout_marginStart="56dp"
android:layout_marginTop="56dp"
android:layout_marginEnd="34dp"
android:layout_marginBottom="97dp"
android:backgroundTint="@android:color/holo_green_dark"
android:src="@drawable/ic_baseline_elements" />
<com.google.android.material.bottomnavigation.BottomNavigationView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/nav_bottom"
android:layout_alignParentBottom="true"
app:itemTextColor="@android:color/black"
app:menu="@menu/drawer_view" />
</RelativeLayout>
AndroidMainfest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.chemicalequationbalancer">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.ChemicalEquationBalancer">
<activity android:name="com.example.chemicalequationbalancer.AboutUs" android:theme="@style/ThemeOverlay.AppCompat.ActionBar"/>
<activity android:name="com.example.chemicalequationbalancer.HelpGuide" android:theme="@style/ThemeOverlay.AppCompat.ActionBar"/>
<activity android:name="com.example.chemicalequationbalancer.eleView" android:theme="@style/ThemeOverlay.AppCompat.ActionBar"/>
<activity
android:name="com.example.chemicalequationbalancer.MainActivity"
android:label="@string/app_name"
android:theme="@style/Theme.ChemicalEquationBalancer.ActionBar" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
build.gradle(应用程序):
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.chemicalequationbalancer">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.ChemicalEquationBalancer">
<activity android:name="com.example.chemicalequationbalancer.AboutUs" android:theme="@style/ThemeOverlay.AppCompat.ActionBar"/>
<activity android:name="com.example.chemicalequationbalancer.HelpGuide" android:theme="@style/ThemeOverlay.AppCompat.ActionBar"/>
<activity android:name="com.example.chemicalequationbalancer.eleView" android:theme="@style/ThemeOverlay.AppCompat.ActionBar"/>
<activity
android:name="com.example.chemicalequationbalancer.MainActivity"
android:label="@string/app_name"
android:theme="@style/Theme.ChemicalEquationBalancer.ActionBar" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Logcat
这是 logcat 中带下划线的行：com.example.chemicalequationbalancer.MainActivity.onCreate(MainActivity.java:51)
2021-02-16 02:07:50.712 13502-13502/com.example.chemicalequationbalancer E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.chemicalequationbalancer, PID: 13502
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.chemicalequationbalancer/com.example.chemicalequationbalancer.MainActivity}: android.view.InflateException: Binary XML file line #31: Binary XML file line #31: Error inflating class com.android.internal.widget.ActionBarContainer
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3197)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3334)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:113)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:71)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2025)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:226)
at android.app.ActivityThread.main(ActivityThread.java:7191)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:499)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:942)
Caused by: android.view.InflateException: Binary XML file line #31: Binary XML file line #31: Error inflating class com.android.internal.widget.ActionBarContainer
Caused by: android.view.InflateException: Binary XML file line #31: Error inflating class com.android.internal.widget.ActionBarContainer
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:343)
at android.view.LayoutInflater.createView(LayoutInflater.java:652)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:817)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:740)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:890)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:851)
at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at com.android.internal.policy.DecorView.onResourcesLoaded(DecorView.java:2239)
at com.android.internal.policy.PhoneWindow.generateLayout(PhoneWindow.java:2761)
at com.android.internal.policy.PhoneWindow.installDecor(PhoneWindow.java:2868)
at com.android.internal.policy.PhoneWindow.getDecorView(PhoneWindow.java:2133)
at androidx.appcompat.app.AppCompatActivity.initViewTreeOwners(AppCompatActivity.java:198)
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:173)
at **com.example.chemicalequationbalancer.MainActivity.onCreate(MainActivity.java:51)**
at android.app.Activity.performCreate(Activity.java:7376)
at android.app.Activity.performCreate(Activity.java:7367)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3177)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3334)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:113)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:71)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2025)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:226)
at android.app.ActivityThread.main(ActivityThread.java:7191)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:499)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:942)
2021-02-16 02:07:50.714 13502-13502/com.example.chemicalequationbalancer E/AndroidRuntime: Caused by: java.lang.UnsupportedOperationException: Failed to resolve attribute at index 13: TypedValue{t=0x2/d=0x1010433 a=1}
at android.content.res.TypedArray.getDrawableForDensity(TypedArray.java:946)
at android.content.res.TypedArray.getDrawable(TypedArray.java:930)
at android.view.View.<init>(View.java:5108)
at android.view.ViewGroup.<init>(ViewGroup.java:665)
at android.widget.FrameLayout.<init>(FrameLayout.java:92)
at android.widget.FrameLayout.<init>(FrameLayout.java:87)
at android.widget.FrameLayout.<init>(FrameLayout.java:82)
at com.android.internal.widget.ActionBarContainer.<init>(ActionBarContainer.java:61)
... 32 more
如果需要任何其他文件，我准备提供。我只想知道发生了什么并解决它。谢谢！
PS: Which of these is the folder which actually gets converted to apk? Is it main folder, the chemicalequationbalancer?
编辑： themes.xml
<resources xmlns:tools="http://schemas.android.com/tools">
<!-- Base application theme. -->
<style name="Theme.ChemicalEquationBalancer" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
<!-- Primary brand color. -->
<item name="colorPrimary">@color/purple_500</item>
<item name="colorPrimaryVariant">@android:color/transparent</item>
<item name="colorOnPrimary">@color/white</item>
<!-- Secondary brand color. -->
<item name="colorSecondary">@color/teal_200</item>
<item name="colorSecondaryVariant">@color/teal_700</item>
<item name="colorOnSecondary">@color/black</item>
<!-- Status bar color. -->
<item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
<!-- Customize your theme here. -->
</style>
<style name="Theme.ChemicalEquationBalancer.NoActionBar">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
</style>
<style name="Theme.ChemicalEquationBalancer.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
<style name="Theme.ChemicalEquationBalancer.ActionBar" parent="ThemeOverlay.AppCompat.Dark.ActionBar">
<item name="windowActionBar">true</item>
<item name="windowNoTitle">false</item>
</style>
<style name="Theme.ChemicalEquationBalancer.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
<style name="DialogStyle" parent="Theme.Design.BottomSheetDialog">
<item name="android:windowIsFloating">false</item>
<item name="android:statusBarColor">@android:color/transparent</item>
<item name="android:windowSoftInputMode">adjustResize</item>
</style>
</resources>
您的 MainActivity 正在扩展 AppCompatActivity，这意味着它继承了默认操作栏。
ThemeOverlay.AppCompat(parent for Theme.ChemicalEquationBalancer.ActionBar) is used to override (or “overlay”) that theme for specific views, especially the Toolbar.
如果您想自定义此 ActionBar（您可能正在这样做），请在 activity 的清单中添加一个 NoActionBar 主题，然后为您的 activity 提供一个工具栏布局。
<activity
android:name="com.example.chemicalequationbalancer.MainActivity"
android:label="@string/app_name"
android:theme="@style/AppTheme.Light.NoActionBar" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
在您的 activity_main.xml 中，您可以添加任何您想要的主题
<androidx.appcompat.widget.Toolbar
...
android:background="?attr/colorPrimary"
android:theme="@style/Theme.ChemicalEquationBalancer.ActionBar />
并且不在清单文件中