移至下一个活动时应用程序崩溃

时间：2020-04-22 22:00:16

标签： android

我不明白应用程序运行正常的问题是什么，但现在它一次又一次崩溃，请花一些时间来帮助我

logcat 

   2020-04-23 03:16:58.315 23244-23244/com.studenthelper.bscithelp E/AndroidRuntime: FATAL   EXCEPTION: main
 Process: com.studenthelper.bscithelp, PID: 23244
 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.studenthelper.bscithelp/com.studenthelper.bscithelp.login}: android.view.InflateException: Binary XML file line #45: Binary XML file line #45: Error inflating class com.google.android.material.textfield.TextInputLayout
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2914)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3049)
    at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
    at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
    at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1809)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6692)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
 Caused by: android.view.InflateException: Binary XML file line #45: Binary XML file line #45: Error inflating class com.google.android.material.textfield.TextInputLayout
 Caused by: android.view.InflateException: Binary XML file line #45: Error inflating class com.google.android.material.textfield.TextInputLayout
 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:647)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:790)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:866)
    at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
    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 androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:555)
    at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:161)
    at com.studenthelper.bscithelp.login.onCreate(login.java:41)
    at android.app.Activity.performCreate(Activity.java:7140)
    at android.app.Activity.performCreate(Activity.java:7131)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1272)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2894)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3049)
    at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
    at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
    at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1809)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6692)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
 Caused by: java.lang.IllegalArgumentException: The style on this component requires your app     theme to be Theme.MaterialComponents (or a descendant).
    at   com.google.android.material.internal.ThemeEnforcement.checkTheme(ThemeEnforcement.java:248)
2020-04-23 03:16:58.316 23244-23244/com.studenthelper.bscithelp E/AndroidRuntime:     at com.google.android.material.internal.ThemeEnforcement.checkMaterialTheme(ThemeEnforcement.java:222)
    at com.google.android.material.internal.ThemeEnforcement.checkCompatibleTheme(ThemeEnforcement.java:150)
    at com.google.android.material.internal.ThemeEnforcement.obtainTintedStyledAttributes(ThemeEnforcement.java:120)
    at com.google.android.material.textfield.TextInputLayout.<init>(TextInputLayout.java:424)
    at com.google.android.material.textfield.TextInputLayout.<init>(TextInputLayout.java:396)
        ... 30 more

XML 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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=".login"
android:background="#FFFFFF"
android:orientation="vertical"
android:padding="20dp">

<ImageView
    android:id="@+id/loginimg"
    android:layout_width="match_parent"
    android:layout_height="250dp"
    android:src="@drawable/signin"
    android:transitionName="logo_image"

    />
<TextView
    android:id="@+id/logintxt"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:fontFamily="@font/purpose"
    android:text="@string/wlcm"
    android:transitionName="logo_text"

    android:textColor="#000"
    android:textSize="40sp" />

<TextView
    android:id="@+id/sgn"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:fontFamily="@font/chil"
    android:text="@string/signin"
    android:textSize="18sp"
    android:textAlignment="center"/>
<LinearLayout
    android:orientation="vertical"
    android:layout_alignBottom="@+id/sgn"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >
<com.google.android.material.textfield.TextInputLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/username"
    android:hint="USERNAME"
    style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
    app:boxStrokeColor="@color/primaryDarkColor"
    >

    <com.google.android.material.textfield.TextInputEditText
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inputType="text"/>
</com.google.android.material.textfield.TextInputLayout>
    <com.google.android.material.textfield.TextInputLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/usrPass"
        android:hint="PASSWORD"
        style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
        app:boxStrokeColor="@color/primaryDarkColor"
        app:passwordToggleEnabled="true">

        <com.google.android.material.textfield.TextInputEditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:inputType="textPassword"/>
    </com.google.android.material.textfield.TextInputLayout>
    <Button
        android:id="@+id/frgt_pass"
        android:layout_width="200dp"
        android:layout_height="wrap_content"
        android:background="#00000000"
        android:text="FORGET PASSWORD"
        android:layout_gravity="right"
        android:elevation="0dp"

        />
    <Button
        android:id="@+id/signin"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="SIGN IN"
        android:textColor="@color/primaryDarkColor"
        android:background="#000000"
        android:fontFamily="@font/android_7"

        />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="NEW USER ? JOIN NOW"
        android:layout_gravity="right"
        android:elevation="0dp"

        />




</LinearLayout>

3 个答案:

答案 0 :(得分：0)

如您在logcat中看到的那样：

此组件上的样式要求您的应用程序主题为Theme.MaterialComponents（或后代）。

因此您必须使用MaterialComponents代替AppCompat

答案 1 :(得分：0)

您正在尝试使用 TextInputLayout 。如果您查看与此元素捆绑在一起的软件包名称，则为 com.google.android.material.textfield.TextInputLayout 。它说 Material ，在Android中表示新的材料设计库。如果要使用此库中的任何元素，则必须使android应用程序的基本样式实现此功能。

解决方案

转到 app->res->values->styles.xml 。

您需要将基本应用程序主题的父级更改为以下内容：

<resources>
  <!-- Base application theme. -->
  <style name="AppTheme" parent="Theme.MaterialComponents.DayNight">
    <!-- Customize your theme here. -->
    <item name="colorPrimary">@color/colorPrimary</item>
    <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
    <item name="colorAccent">@color/colorAccent</item>
  </style>
</resources>

答案 2 :(得分：0)

这可能是因为您已经更新了Material Design的依存关系，可以尝试在应用的gradle文件中恢复到以前的版本。

implementation 'com.google.android.material:material:x.y.z'

还原后，只需运行gradle同步，就可以了。

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