不幸的是，（应用程序名称）已停止 - Android开发错误

Question

我正在学习开发Android应用程序，并在我的第一个项目中遇到了问题。我正在按照教程（Derek Banas）创建一个应用程序，该应用程序将允许用户键入一些文本，点击一个按钮，然后该应用程序将输出该文本。 我写的代码，并已收到没有错误，但每当我运行模拟器上的应用程序，它说：“不幸的是，（应用程序名称）已停止 这里是日志猫：

08-23 17:51:36.026: D/AndroidRuntime(800): Shutting down VM 
08-23 17:51:36.063: W/dalvikvm(800): threadid=1: thread exiting with uncaught exception  (group=0x414c4700) 
08-23 17:51:36.196: E/AndroidRuntime(800): FATAL EXCEPTION: main 
08-23 17:51:36.196: E/AndroidRuntime(800): java.lang.RuntimeException: Unable to start  activity ComponentInfo{com.nick.android.nick/com.nick.android.nick.MainActivity}:  java.lang.RuntimeException: Binary XML file line #12: You must supply a layout_height attribute. 
08-23 17:51:36.196: E/AndroidRuntime(800): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211) 
08-23 17:51:36.196: E/AndroidRuntime(800): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261) 
08-23 17:51:36.196: E/AndroidRuntime(800): at android.app.ActivityThread.access$600(ActivityThread.java:141) 
08-23 17:51:36.196: E/AndroidRuntime(800): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256) 
08-23 17:51:36.196: E/AndroidRuntime(800): at android.os.Handler.dispatchMessage(Handler.java:99) 
08-23 17:51:36.196: E/AndroidRuntime(800): at android.os.Looper.loop(Looper.java:137) 
08-23 17:51:36.196: E/AndroidRuntime(800): at android.app.ActivityThread.main(ActivityThread.java:5103) 
08-23 17:51:36.196: E/AndroidRuntime(800): at java.lang.reflect.Method.invokeNative(Native Method) 
08-23 17:51:36.196: E/AndroidRuntime(800): at java.lang.reflect.Method.invoke(Method.java:525) 
08-23 17:51:36.196: E/AndroidRuntime(800): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) 
08-23 17:51:36.196: E/AndroidRuntime(800): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
08-23 17:51:36.196: E/AndroidRuntime(800): at dalvik.system.NativeStart.main(Native Method) 
08-23 17:51:36.196: E/AndroidRuntime(800): Caused by: java.lang.RuntimeException: Binary XML file line #12: You must supply a layout_height attribute. 
08-23 17:51:36.196: E/AndroidRuntime(800): at android.content.res.TypedArray.getLayoutDimension(TypedArray.java:491) 
08-23 17:51:36.196: E/AndroidRuntime(800): at android.view.ViewGroup$LayoutParams.setBaseAttributes(ViewGroup.java:5820) 
08-23 17:51:36.196: E/AndroidRuntime(800): at android.view.ViewGroup$MarginLayoutParams.<init>(ViewGroup.java:5988) 
08-23 17:51:36.196: E/AndroidRuntime(800): at android.widget.LinearLayout$LayoutParams.<init>(LinearLayout.java:1831) 
08-23 17:51:36.196: E/AndroidRuntime(800): at android.widget.LinearLayout.generateLayoutParams(LinearLayout.java:1743) 
08-23 17:51:36.196: E/AndroidRuntime(800): at android.widget.LinearLayout.generateLayoutParams(LinearLayout.java:58) 
08-23 17:51:36.196: E/AndroidRuntime(800): at android.view.LayoutInflater.rInflate(LayoutInflater.java:757) 
08-23 17:51:36.196: E/AndroidRuntime(800): at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 
08-23 17:51:36.196: E/AndroidRuntime(800): at android.view.LayoutInflater.inflate(LayoutInflater.java:397) 
08-23 17:51:36.196: E/AndroidRuntime(800): at android.view.LayoutInflater.inflate(LayoutInflater.java:353) 
08-23 17:51:36.196: E/AndroidRuntime(800): at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:267) 
08-23 17:51:36.196: E/AndroidRuntime(800): at android.app.Activity.setContentView(Activity.java:1895) 
08-23 17:51:36.196: E/AndroidRuntime(800): at com.nick.android.nick.MainActivity.onCreate(MainActivity.java:17) 
08-23 17:51:36.196: E/AndroidRuntime(800): at android.app.Activity.performCreate(Activity.java:5133) 
08-23 17:51:36.196: E/AndroidRuntime(800): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
08-23 17:51:36.196: E/AndroidRuntime(800): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2175) 
08-23 17:51:36.196: E/AndroidRuntime(800): ... 11 more 

Answer 1

错误来自你MainActivitys方法setContentView(...).

要设置为你的活动的XML布局文件包含不具有layout_height属性。layout_height和layout_width都需要在每个图的图。

这信息在您发布的logcat的摘录提供：

08-23 17:51:36.196: E/AndroidRuntime(800): Caused by: java.lang.RuntimeException: Binary XML file line #12: You must supply a layout_height attribute.