当我插入线性布局时，我得到“应用程序意外停止”错误

时间：2014-06-19 07:30:07

标签： android xml android-linearlayout

我是一个Android新手，最近开始学习。

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/black"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.bugaman.android.inspireme.MainActivity$PlaceholderFragment" >

    <ImageView
        android:id="@+id/imageView2"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="fitCenter"
        android:src="@drawable/inspire" />

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:src="@drawable/finalshake" />

    <Button
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_above="@+id/imageView1"
        android:layout_centerHorizontal="true"
        android:text="Inspire Me!"
        android:textSize="24sp"
        android:typeface="serif" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:shadowColor="#000000"
        android:shadowDx="0.0"
        android:shadowDy="0.0"
        android:shadowRadius="2.0"
        android:textColor="#FFFFFF"
        android:textSize="22sp"
        android:typeface="serif" />

</RelativeLayout>

当我运行此代码时，一切都很好，但是当我插入一个线性布局时，我得到以下代码的错误。

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/black"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.bugaman.android.inspireme.MainActivity$PlaceholderFragment" >

    <ImageView
        android:id="@+id/imageView2"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="fitCenter"
        android:src="@drawable/inspire" />

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:orientation="vertical"
        android:weightSum="1" >

        <TextView
            android:id="@+id/textView1"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="0.77"
            android:shadowColor="#000000"
            android:shadowDx="0.0"
            android:shadowDy="0.0"
            android:shadowRadius="2.0"
            android:textColor="#FFFFFF"
            android:textSize="22sp"
            android:typeface="serif" />

        <Button
            android:id="@+id/button1"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="0.115"
            android:text="Inspire Me!"
            android:textSize="24sp"
            android:typeface="serif" />

        <ImageView
            android:id="@+id/imageView1"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="0.115"
            android:src="@drawable/finalshake" />

    </LinearLayout>

</RelativeLayout>

我在这里做的是， 插入LinearLayout（垂直）... 填充高度... 水平居中...... 将textview1，button1和imageview1拖入LinearLayout ... 将线性布局的权重更改为1 ... textview1的重量为0.77 ... button1到0.115的重量...... imageview1的重量为0.115 ...... 将textview1，button1和imageview1的布局高度更改为0dp ... 现在，如果我跑，我得到错误'应用程序等等等已经意外停止。'...。

有人知道我做错了吗？

Logcat消息 - 

06-19 12:55:34.409: D/AndroidRuntime(7999): Shutting down VM
06-19 12:55:34.419: W/dalvikvm(7999): threadid=1: thread exiting with uncaught exception (group=0x401b9648)
06-19 12:55:34.429: E/AndroidRuntime(7999): FATAL EXCEPTION: main
06-19 12:55:34.429: E/AndroidRuntime(7999): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.bugaman.android.inspireme/com.bugaman.android.inspireme.MainActivity}: java.lang.ClassCastException: android.widget.ImageView
06-19 12:55:34.429: E/AndroidRuntime(7999):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1872)
06-19 12:55:34.429: E/AndroidRuntime(7999):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1893)
06-19 12:55:34.429: E/AndroidRuntime(7999):     at android.app.ActivityThread.access$1500(ActivityThread.java:135)
06-19 12:55:34.429: E/AndroidRuntime(7999):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1054)
06-19 12:55:34.429: E/AndroidRuntime(7999):     at android.os.Handler.dispatchMessage(Handler.java:99)
06-19 12:55:34.429: E/AndroidRuntime(7999):     at android.os.Looper.loop(Looper.java:150)
06-19 12:55:34.429: E/AndroidRuntime(7999):     at android.app.ActivityThread.main(ActivityThread.java:4389)
06-19 12:55:34.429: E/AndroidRuntime(7999):     at java.lang.reflect.Method.invokeNative(Native Method)
06-19 12:55:34.429: E/AndroidRuntime(7999):     at java.lang.reflect.Method.invoke(Method.java:507)
06-19 12:55:34.429: E/AndroidRuntime(7999):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849)
06-19 12:55:34.429: E/AndroidRuntime(7999):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:607)
06-19 12:55:34.429: E/AndroidRuntime(7999):     at dalvik.system.NativeStart.main(Native Method)
06-19 12:55:34.429: E/AndroidRuntime(7999): Caused by: java.lang.ClassCastException: android.widget.ImageView
06-19 12:55:34.429: E/AndroidRuntime(7999):     at com.bugaman.android.inspireme.MainActivity.onCreate(MainActivity.java:24)
06-19 12:55:34.429: E/AndroidRuntime(7999):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1072)
06-19 12:55:34.429: E/AndroidRuntime(7999):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1836)
06-19 12:55:34.429: E/AndroidRuntime(7999):     ... 11 more
06-19 13:03:33.717: D/AndroidRuntime(9096): Shutting down VM
06-19 13:03:33.717: W/dalvikvm(9096): threadid=1: thread exiting with uncaught exception (group=0x401b9648)
06-19 13:03:33.727: E/AndroidRuntime(9096): FATAL EXCEPTION: main
06-19 13:03:33.727: E/AndroidRuntime(9096): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.bugaman.android.inspireme/com.bugaman.android.inspireme.MainActivity}: java.lang.ClassCastException: android.widget.ImageView
06-19 13:03:33.727: E/AndroidRuntime(9096):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1872)
06-19 13:03:33.727: E/AndroidRuntime(9096):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1893)
06-19 13:03:33.727: E/AndroidRuntime(9096):     at android.app.ActivityThread.access$1500(ActivityThread.java:135)
06-19 13:03:33.727: E/AndroidRuntime(9096):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1054)
06-19 13:03:33.727: E/AndroidRuntime(9096):     at android.os.Handler.dispatchMessage(Handler.java:99)
06-19 13:03:33.727: E/AndroidRuntime(9096):     at android.os.Looper.loop(Looper.java:150)
06-19 13:03:33.727: E/AndroidRuntime(9096):     at android.app.ActivityThread.main(ActivityThread.java:4389)
06-19 13:03:33.727: E/AndroidRuntime(9096):     at java.lang.reflect.Method.invokeNative(Native Method)
06-19 13:03:33.727: E/AndroidRuntime(9096):     at java.lang.reflect.Method.invoke(Method.java:507)
06-19 13:03:33.727: E/AndroidRuntime(9096):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:849)
06-19 13:03:33.727: E/AndroidRuntime(9096):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:607)
06-19 13:03:33.727: E/AndroidRuntime(9096):     at dalvik.system.NativeStart.main(Native Method)
06-19 13:03:33.727: E/AndroidRuntime(9096): Caused by: java.lang.ClassCastException: android.widget.ImageView
06-19 13:03:33.727: E/AndroidRuntime(9096):     at com.bugaman.android.inspireme.MainActivity.onCreate(MainActivity.java:24)
06-19 13:03:33.727: E/AndroidRuntime(9096):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1072)
06-19 13:03:33.727: E/AndroidRuntime(9096):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1836)
06-19 13:03:33.727: E/AndroidRuntime(9096):     ... 11 more
06-19 13:08:33.820: D/Process(9096): killProcess, pid=9096

1 个答案:

答案 0 :(得分：0)

清理并重建您的应用。

有时，在编辑资源XML文件并重新排序，添加或删除带有@+id标识符的元素时，id号会在生成的R.java和已编译的二进制XML资源文件之间混乱。在使用findViewById()请求视图时，id与其他视图匹配并尝试将结果转换为其他类型可能会导致ClassCastException。

使用ADT的Android开发人员必须学习：构建依赖系统并不真正可靠，当与资源相关的东西不能正常工作时，首先清理并重建以确定它是否能解决问题。

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