[英]Getting an error when I try to inflate my layout from this fragment
我已经在我的应用程序中使用过这种方法，并且效果很好。 我现在正在做完全相同的事情，但是我收到一条错误消息：错误使类android.view.View膨胀错误我正在使用与上一个屏幕相同的基本XML布局。 它有2个片段。 告诉用户他/她已登录，然后在下面显示我的新片段（一种表单）的上层窗口。 但是，下面的一个似乎是问题所在。 这是我的基本布局：
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
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"
tools:context="com.bignerdranch.android.personaltrainer.CustomerListActivity">
<LinearLayout
android:layout_width="304dp"
android:layout_height="wrap_content"
android:id="@+id/logged_in_fragment_container"
android:orientation="horizontal"
android:layout_marginLeft="8dp"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_marginRight="8dp"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginTop="8dp"
tools:layout_height="18dp"
android:layout_marginBottom="8dp"
app:layout_constraintBottom_toTopOf="@+id/list_fragment_container"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp">
</LinearLayout>
<android.support.constraint.ConstraintLayout
android:id="@+id/list_fragment_container"
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginBottom="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="34dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp">
</android.support.constraint.ConstraintLayout>
</android.support.constraint.ConstraintLayout>
这是最主要的Fragement：不知道您是否真的需要这个，但是在这里
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/container_for_loggedin_textview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="5dp"
tools:context="com.bignerdranch.android.personaltrainer.LoggedInFragment">
<TextView
android:id="@+id/logged_in_text_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:text="You are logged in"
android:textAlignment="center"
android:textSize="18sp"
android:textStyle="bold|italic"/>
</FrameLayout>
这是我尝试为它充气时遇到的片段：
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
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">
<TextView
android:id="@+id/textView_new_customer_title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginTop="16dp"
android:text="@string/new_customer_title"
android:textSize="24sp"
android:textStyle="bold"
android:typeface="serif"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginStart="16dp"/>
<ImageView
android:id="@+id/new_customer_pic"
android:layout_width="84dp"
android:layout_height="82dp"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="60dp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="@mipmap/ic_launcher"/>
<EditText
android:id="@+id/tv_first_name"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="152dp"
android:ems="10"
android:hint="First Name"
android:inputType="textPersonName"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"/>
<EditText
android:id="@+id/tv_last_name"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:layout_marginTop="5dp"
android:ems="10"
android:hint="Last Name"
android:inputType="textPersonName"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/tv_first_name"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp"/>
<EditText
android:id="@+id/tv_city"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:ems="10"
android:hint="City"
android:inputType="textPersonName"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_marginStart="16dp"
android:layout_marginTop="5dp"
app:layout_constraintTop_toBottomOf="@+id/tv_address"/>
<Spinner
android:id="@+id/spinner_state"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:background="@color/colorPrimary"
android:entries="@array/states"
app:layout_constraintBottom_toBottomOf="@+id/tv_city"
app:layout_constraintHorizontal_bias="0.433"
app:layout_constraintLeft_toRightOf="@+id/tv_city"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/tv_last_name"
app:layout_constraintVertical_bias="0.913"/>
<EditText
android:id="@+id/tv_zip"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginTop="5dp"
android:ems="10"
android:hint="ZipCode"
android:inputType="textPersonName"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toBottomOf="@+id/tv_city"
android:layout_marginStart="16dp"/>
<View
android:layout_width="0dp"
android:layout_height="2dp"
android:background="@color/colorPrimaryDark"
android:backgroundTint="@drawable/divider"
android:layout_marginLeft="8dp"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_marginRight="8dp"
app:layout_constraintRight_toRightOf="parent"
android:id="@+id/view"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintTop_toBottomOf="@+id/tv_zip"/>
<Button
android:id="@+id/cancel_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/cancel_button"
android:layout_marginTop="8dp"
app:layout_constraintTop_toBottomOf="@+id/view"
android:layout_marginLeft="8dp"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_marginStart="8dp"/>
<Button
android:id="@+id/add_customer_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/add_button"
android:layout_marginRight="8dp"
app:layout_constraintRight_toRightOf="parent"
android:layout_marginTop="8dp"
app:layout_constraintTop_toBottomOf="@+id/view"
android:layout_marginStart="64dp"
android:layout_marginEnd="8dp"
app:layout_constraintLeft_toRightOf="@+id/camera_button"/>
<android.support.design.widget.FloatingActionButton
android:id="@+id/camera_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_camera_black_24dp"
app:backgroundTint="@color/colorPrimaryDark"
app:elevation="6dp"
app:fabSize="auto"
app:rippleColor="?android:attr/colorBackground"
android:layout_marginTop="10dp"
app:layout_constraintTop_toBottomOf="@+id/view"
android:layout_marginStart="64dp"
app:layout_constraintLeft_toRightOf="@+id/cancel_button"
android:layout_marginLeft="64dp"/>
<Button
android:id="@+id/billing_info_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/billing_info_button"
android:layout_marginRight="16dp"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginTop="60dp"
android:layout_marginEnd="16dp"/>
<EditText
android:id="@+id/tv_address"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:layout_marginTop="4dp"
android:ems="10"
android:hint="Street Address"
android:inputType="textPersonName"
app:layout_constraintHorizontal_bias="0.503"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toBottomOf="@+id/tv_last_name"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp"/>
</android.support.constraint.ConstraintLayout>
这是我使用片段管理器的基本活动：
package com.bignerdranch.android.personaltrainer;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
public class NewCustomerActivity extends AppCompatActivity {
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_base);
FragmentManager fm = getSupportFragmentManager();
Fragment fragment = fm.findFragmentById(R.id.logged_in_fragment_container);
if (fragment == null){
fragment = new LoggedInFragment();
fm.beginTransaction()
.add(R.id.logged_in_fragment_container, fragment)
.commit();
}
// don't be confused by "list_fragment_container" it's the same container used for the recyclerview
Fragment fragment2 = fm.findFragmentById(R.id.list_fragment_container);
if (fragment2 == null){
fragment2 = new NewCustomerFragment();
fm.beginTransaction()
.add(R.id.list_fragment_container, fragment2)
.commit();
}
}
}
这是引发错误的片段：
package com.bignerdranch.android.personaltrainer;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Spinner;
import android.widget.TextView;
import com.bignerdranch.android.personaltrainer.model.Customer;
/**
* Created by patricgekoski on 9/3/17.
*/
public class NewCustomerFragment extends Fragment {
private Customer mCustomer;
private Button mBillingInfoButton;
private Button mCancelButton;
private Button mAddButton;
private FloatingActionButton mCameraButton;
private ImageView mCustomerPic;
private TextView mFirstName;
private TextView mLastName;
private TextView mAddress;
private TextView mCity;
private Spinner mState;
private TextView mZip;
public NewCustomerFragment(){
// empty constructor
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup parent,
Bundle savedInstanceState){
// !!!!!!! 此下一行引发错误!!!!!!!!!!!
View view = inflater.inflate(R.layout.fragment_new_customer, parent, false);
mBillingInfoButton.findViewById(R.id.billing_info_button);
mCancelButton.findViewById(R.id.cancel_button);
mAddButton.findViewById(R.id.add_customer_button);
mCameraButton.findViewById(R.id.camera_button);
mCustomerPic.findViewById(R.id.new_customer_pic);
mFirstName.findViewById(R.id.tv_first_name);
mLastName.findViewById(R.id.tv_last_name);
mAddress.findViewById(R.id.tv_address);
mCity.findViewById(R.id.tv_city);
mState.findViewById(R.id.spinner_state);
mZip.findViewById(R.id.tv_zip);
return view;
}
}
最后是我的堆栈跟踪：至少有一部分
09-03 10:25:50.996 29649-29649/com.bignerdranch.android.personaltrainer E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.bignerdranch.android.personaltrainer, PID: 29649
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.bignerdranch.android.personaltrainer/com.bignerdranch.android.personaltrainer.NewCustomerActivity}: android.view.InflateException: Binary XML file line #112: Binary XML file line #112: Error inflating class android.view.View
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: android.view.InflateException: Binary XML file line #112: Binary XML file line #112: Error inflating class android.view.View
at android.view.LayoutInflater.inflate(LayoutInflater.java:539)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at com.bignerdranch.android.personaltrainer.NewCustomerFragment.onCreateView(NewCustomerFragment.java:43)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:2239)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1332)
at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1574)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1641)
at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:794)
at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2415)
at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2200)
at android.support.v4.app.FragmentManagerImpl.optimizeAndExecuteOps(FragmentManager.java:2153)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2063)
at android.support.v4.app.FragmentController.execPendingActions(FragmentController.java:388)
at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:554)
at android.support.v7.app.AppCompatActivity.onStart(AppCompatActivity.java:177)
at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1237)
at android.app.Activity.performStart(Activity.java:6253)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2379)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: android.view.InflateException: Binary XML file line #112: Error inflating class android.view.View
at android.view.LayoutInflater.createView(LayoutInflater.java:645)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:677)
at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:68)
at android.view.LayoutInflater.onCreateView(LayoutInflater.java:694)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:762)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:835)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at com.bignerdranch.android.personaltrainer.NewCustomerFragment.onCreateView(NewCustomerFragment.java:43)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:2239)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1332)
at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1574)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1641)
at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:794)
at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2415)
at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2200)
at android.support.v4.app.FragmentManagerImpl.optimizeAndExecuteOps(FragmentManager.java:2153)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2063)
at android.support.v4.app.FragmentController.execPendingActions(FragmentController.java:388)
at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:554)
at android.support.v7.app.AppCompatActivity.onStart(AppCompatActivity.java:177)
at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1237)
at android.app.Activity.performStart(Activity.java:6253)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2379)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
先感谢您
我想到了。 这是一个非常微妙的错误。 我试图在布局中使用“ backgroundTint”属性，但该属性的引入要比我的最低API 19更高。
尝试注释掉该片段中的所有代码，从膨胀到findView。 如果问题仍然存在，则可能是由于堆栈跟踪建议的NumbersActivity引起的，请尝试注释掉调用NumbersFragment的部分以获得更多提示。 希望能带您走向解决方案。
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