由于错误无法启动基本应用程序（UnsupportedOperationException：无法转换为维度：类型 = 0x1）

【问题标题】：Unable to start basic app due to error (UnsupportedOperationException: Can't convert to dimension: type=0x1)由于错误无法启动基本应用程序（UnsupportedOperationException：无法转换为维度：类型 = 0x1）
【发布时间】：2016-04-03 17:37:58
【问题描述】：

我正在学习创建CardView。我可以在布局文件的设计选项卡和布局文本部分的预览部分中看到布局的外观。

但是，当我在模拟器或 Android 设备上运行该应用程序时，它会抛出一条错误消息：“很遗憾，CardActivity 已停止工作。”

我不知道我做错了什么，所以请帮忙。

这是activity_main.xml文件内容。

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout 
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:card_view="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="10dp">

        <!-- A CardView That contains a TextView -->
        <android.support.v7.widget.CardView 
            xmlns:card_view="http://schemas.android.com/apk/res-auto"
            android:id="@+id/card_view"
            android:layout_width="match_parent"
            card_view:cardUseCompatPadding="true"
            card_view:cardElevation="4dp"
            android:layout_height="wrap_content"
            card_view:cardCornerRadius="5dp"
            android:background="#dddddd">

            <LinearLayout
                android:layout_width="match_parent"
                android:orientation="vertical"
                android:layout_height="match_parent"
                android:weightSum="1"
                android:padding="10dp">

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:orientation="horizontal"
                    android:background="#4f76d2">

                    <ImageView
                        android:layout_width="50dp"
                        android:layout_height="50dp"
                        android:scaleType="centerCrop"
                        android:layout_margin="5dp"
                        android:src="@drawable/image" />

                    <TextView
                        android:id="@+id/info_text"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="@string/name"
                        android:textSize="?android:attr/textAppearanceLarge"
                        android:layout_margin="20dp"
                        android:textColor="#ffffff"
                        android:textIsSelectable="true" />

                </LinearLayout>

                <TextView
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:text="@string/para_text"
                    android:textSize="?android:attr/textAppearanceSmall"
                    android:textColor="#88b0f5"
                    android:padding="5dp" />

            </LinearLayout>

        </android.support.v7.widget.CardView>

    </LinearLayout>

这是 MainActivity.java 文件内容。

package com.example.android.cardactivity;

import android.app.Activity;
import android.os.Bundle;

public class MainActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
}

这就是 Android 监视器中显示的全部内容。

04-03 22:55:13.164 20095-20095/com.example.android.cardactivity E/AndroidRuntime: FATAL EXCEPTION: main
      Process: com.example.android.cardactivity, PID: 20095
      java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.android.cardactivity/com.example.android.cardactivity.MainActivity}: android.view.InflateException: Binary XML file line #41: Binary XML file line #41: Error inflating class android.widget.TextView
          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 #41: Binary XML file line #41: Error inflating class android.widget.TextView
          at android.view.LayoutInflater.inflate(LayoutInflater.java:539)
          at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
          at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
          at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:393)
          at android.app.Activity.setContentView(Activity.java:2166)
          at com.example.android.cardactivity.MainActivity.onCreate(MainActivity.java:10)
          at android.app.Activity.performCreate(Activity.java:6237)
          at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
          at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
          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 #41: Error inflating class android.widget.TextView
          at android.view.LayoutInflater.createView(LayoutInflater.java:645)
          at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:58)
          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.rInflate(LayoutInflater.java:838)
          at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
          at android.view.LayoutInflater.rInflate(LayoutInflater.java:838)
          at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
          at android.view.LayoutInflater.rInflate(LayoutInflater.java:838)
          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 android.view.LayoutInflater.inflate(LayoutInflater.java:374) 
          at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:393) 
          at android.app.Activity.setContentView(Activity.java:2166) 
          at com.example.android.cardactivity.MainActivity.onCreate(MainActivity.java:10) 
          at android.app.Activity.performCreate(Activity.java:6237) 
          at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) 
          at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369) 
          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: java.lang.reflect.InvocationTargetException
          at java.lang.reflect.Constructor.newInstance(Native Method)
          at android.view.LayoutInflater.createView(LayoutInflater.java:619)
          at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:58) 
          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.rInflate(LayoutInflater.java:838) 
          at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798) 
          at android.view.LayoutInflater.rInflate(LayoutInflater.java:838) 
          at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798) 
          at android.view.LayoutInflater.rInflate(LayoutInflater.java:838) 
          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 android.view.LayoutInflater.inflate(LayoutInflater.java:374) 
          at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:393) 
          at android.app.Activity.setContentView(Activity.java:2166) 
          at com.example.android.cardactivity.MainActivity.onCreate(MainActivity.java:10) 
          at android.app.Activity.performCreate(Activity.java:6237) 
          at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) 
          at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369) 
          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: java.lang.UnsupportedOperationException: Can't convert to dimension: type=0x1
          at android.content.res.TypedArray.getDimensionPixelSize(TypedArray.java:666)
          at android.widget.TextView.<init>(TextView.java:1055)
          at android.widget.TextView.<init>(TextView.java:671)
          at android.widget.TextView.<init>(TextView.java:667)
          at java.lang.reflect.Constructor.newInstance(Native Method) 
          at android.view.LayoutInflater.createView(LayoutInflater.java:619) 
          at com.android.internal.policy.PhoneLayoutInflater.onCreateView(PhoneLayoutInflater.java:58) 
          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.rInflate(LayoutInflater.java:838) 
          at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798) 
          at android.view.LayoutInflater.rInflate(LayoutInflater.java:838) 
          at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798) 
          at android.view.LayoutInflater.rInflate(LayoutInflater.java:838) 
          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 android.view.LayoutInflater.inflate(LayoutInflater.java:374) 
          at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:393) 
          at android.app.Activity.setContentView(Activity.java:2166) 
          at com.example.android.cardactivity.MainActivity.onCreate(MainActivity.java:10) 
          at android.app.Activity.performCreate(Activity.java:6237) 
          at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) 
          at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369) 
          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)

【问题讨论】：

  • 可能是您的Text View 没有得到查看。您的主要活动中的第 10 行是哪一条？
  • @jaydroider 你能告诉我更多吗？或者如果可能的话，您能否建议将所需的代码更改为代码。在此先感谢:)
  • 如果完成，您能否发布您的主要活动的完整代码。
  • @jaydroider 主要活动中的第 10 行是 setContentView(R.layout.activity_main);我已经在问题中添加了 MainActivity.java 类的所有内容
  • schemas.android.com/apk/res-auto"......remove 你的 xml 上的这一行首先......你也在线性布局中声明

标签： java android android-cardview android-studio-2.0


【解决方案1】：

您正在为属性android:textSize 分配无效值?android:attr/textAppearanceLarge。您应该改为将值分配给 android:textAppearance，如下所示：

<TextView
    android:id="@+id/info_text"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/name"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:layout_margin="20dp"
    android:textColor="#ffffff"
    android:textIsSelectable="true" />

java.lang.UnsupportedOperationException：无法转换为维度： 类型=0x1

以上是堆栈跟踪底部发现的异常的关键部分，可以帮助您找出错误。

基本上，android:textSize 属性需要一个值的维度。

?android:attr/textAppearanceLarge 不是维度值，因此应用程序在尝试将其转换为维度值时崩溃。

【讨论】：

  • @ARTofFeeding 不客气。我添加了一些关于我如何发现错误的更多细节，这可能会在未来帮助你。
  • @GeorgeMulligan 谢谢人 :) 希望将来也能得到像你这样的人的帮助 :)
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