我开发了一个从第一个活动到第二个活动的导航应用程序。当我运行我的应用程序时，它显示“不幸的是应用已停止”。我发布了我的代码和日志cat errors.help我请。从errors.plsss中恢复
主要活动：
<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: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=".MainActivity" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginTop="90dp"
android:text="REGISTER" />
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/button1"
android:layout_alignBottom="@+id/button1"
android:layout_marginLeft="54dp"
android:layout_toRightOf="@+id/button1"
android:text="LOGIN" />
</RelativeLayout>
注册表活动：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="wrap_content"
android:layout_height="match_parent"
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=".RegActivity"
android:background="#ffff0000">
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/textView2"
android:layout_marginTop="23dp"
android:text="USER NAME"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="32dp"
android:text="REGISTRATION FORM"
android:textAppearance="?android:attr/textAppearanceLarge" />
<EditText
android:id="@+id/editText2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView3"
android:layout_alignBottom="@+id/textView3"
android:layout_alignRight="@+id/editText1"
android:ems="10"
android:inputType="textPassword" />
<EditText
android:id="@+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="@+id/textView3"
android:layout_alignParentRight="true"
android:ems="10"
android:inputType="textPersonName" />
<EditText
android:id="@+id/editText3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="@+id/textView4"
android:layout_alignBottom="@+id/textView4"
android:layout_alignParentRight="true"
android:ems="10"
android:inputType="textEmailAddress" />
<Button
android:id="@+id/button4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="@+id/textView2"
android:layout_below="@+id/editText4"
android:text="CANCEL" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView1"
android:layout_below="@+id/textView1"
android:text="PASSWORD"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView3"
android:layout_below="@+id/editText2"
android:text="E-MAIL ID"
android:textAppearance="?android:attr/textAppearanceMedium" />
<EditText
android:id="@+id/editText4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignTop="@+id/textView5"
android:ems="10"
android:inputType="textPostalAddress" >
<requestFocus />
</EditText>
<TextView
android:id="@+id/textView5"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/textView4"
android:layout_below="@+id/editText3"
android:text="ADDRESS"
android:textAppearance="?android:attr/textAppearanceMedium" />
<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:text="SUBMIT" />
</RelativeLayout>
清单：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.pizza"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.pizza.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".RegAcitvity"/>
</application>
</manifest>
logcat的：
02-11 09:05:44.983: D/gralloc_goldfish(1062): Emulator without GPU emulation detected.
02-11 09:05:47.363: D/AndroidRuntime(1062): Shutting down VM
02-11 09:05:47.363: W/dalvikvm(1062): threadid=1: thread exiting with uncaught exception (group=0xb4ad2b90)
02-11 09:05:47.373: E/AndroidRuntime(1062): FATAL EXCEPTION: main
02-11 09:05:47.373: E/AndroidRuntime(1062): Process: com.example.pizza, PID: 1062
02-11 09:05:47.373: E/AndroidRuntime(1062): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.pizza/com.example.pizza.RegActivity}; have you declared this activity in your AndroidManifest.xml?
02-11 09:05:47.373: E/AndroidRuntime(1062): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1628)
02-11 09:05:47.373: E/AndroidRuntime(1062): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1424)
02-11 09:05:47.373: E/AndroidRuntime(1062): at android.app.Activity.startActivityForResult(Activity.java:3423)
02-11 09:05:47.373: E/AndroidRuntime(1062): at android.app.Activity.startActivityForResult(Activity.java:3384)
02-11 09:05:47.373: E/AndroidRuntime(1062): at android.app.Activity.startActivity(Activity.java:3626)
02-11 09:05:47.373: E/AndroidRuntime(1062): at android.app.Activity.startActivity(Activity.java:3594)
02-11 09:05:47.373: E/AndroidRuntime(1062): at com.example.pizza.MainActivity$1.onClick(MainActivity.java:33)
02-11 09:05:47.373: E/AndroidRuntime(1062): at android.view.View.performClick(View.java:4424)
02-11 09:05:47.373: E/AndroidRuntime(1062): at android.view.View$PerformClick.run(View.java:18383)
02-11 09:05:47.373: E/AndroidRuntime(1062): at android.os.Handler.handleCallback(Handler.java:733)
02-11 09:05:47.373: E/AndroidRuntime(1062): at android.os.Handler.dispatchMessage(Handler.java:95)
02-11 09:05:47.373: E/AndroidRuntime(1062): at android.os.Looper.loop(Looper.java:137)
02-11 09:05:47.373: E/AndroidRuntime(1062): at android.app.ActivityThread.main(ActivityThread.java:4998)
02-11 09:05:47.373: E/AndroidRuntime(1062): at java.lang.reflect.Method.invokeNative(Native Method)
02-11 09:05:47.373: E/AndroidRuntime(1062): at java.lang.reflect.Method.invoke(Method.java:515)
02-11 09:05:47.373: E/AndroidRuntime(1062): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777)
02-11 09:05:47.373: E/AndroidRuntime(1062): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593)
02-11 09:05:47.373: E/AndroidRuntime(1062): at dalvik.system.NativeStart.main(Native Method)
02-11 09:05:53.063: I/Process(1062): Sending signal. PID: 1062 SIG: 9
02-11 09:05:57.913: D/gralloc_goldfish(1088): Emulator without GPU emulation detected.
02-11 09:06:50.013: D/AndroidRuntime(1088): Shutting down VM
02-11 09:06:50.013: W/dalvikvm(1088): threadid=1: thread exiting with uncaught exception (group=0xb4ad2b90)
02-11 09:06:50.093: E/AndroidRuntime(1088): FATAL EXCEPTION: main
02-11 09:06:50.093: E/AndroidRuntime(1088): Process: com.example.pizza, PID: 1088
02-11 09:06:50.093: E/AndroidRuntime(1088): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.pizza/com.example.pizza.RegActivity}; have you declared this activity in your AndroidManifest.xml?
02-11 09:06:50.093: E/AndroidRuntime(1088): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1628)
02-11 09:06:50.093: E/AndroidRuntime(1088): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1424)
02-11 09:06:50.093: E/AndroidRuntime(1088): at android.app.Activity.startActivityForResult(Activity.java:3423)
02-11 09:06:50.093: E/AndroidRuntime(1088): at android.app.Activity.startActivityForResult(Activity.java:3384)
02-11 09:06:50.093: E/AndroidRuntime(1088): at android.app.Activity.startActivity(Activity.java:3626)
02-11 09:06:50.093: E/AndroidRuntime(1088): at android.app.Activity.startActivity(Activity.java:3594)
02-11 09:06:50.093: E/AndroidRuntime(1088): at com.example.pizza.MainActivity$1.onClick(MainActivity.java:33)
02-11 09:06:50.093: E/AndroidRuntime(1088): at android.view.View.performClick(View.java:4424)
02-11 09:06:50.093: E/AndroidRuntime(1088): at android.view.View$PerformClick.run(View.java:18383)
02-11 09:06:50.093: E/AndroidRuntime(1088): at android.os.Handler.handleCallback(Handler.java:733)
02-11 09:06:50.093: E/AndroidRuntime(1088): at android.os.Handler.dispatchMessage(Handler.java:95)
02-11 09:06:50.093: E/AndroidRuntime(1088): at android.os.Looper.loop(Looper.java:137)
02-11 09:06:50.093: E/AndroidRuntime(1088): at android.app.ActivityThread.main(ActivityThread.java:4998)
02-11 09:06:50.093: E/AndroidRuntime(1088): at java.lang.reflect.Method.invokeNative(Native Method)
02-11 09:06:50.093: E/AndroidRuntime(1088): at java.lang.reflect.Method.invoke(Method.java:515)
02-11 09:06:50.093: E/AndroidRuntime(1088): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777)
02-11 09:06:50.093: E/AndroidRuntime(1088): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593)
02-11 09:06:50.093: E/AndroidRuntime(1088): at dalvik.system.NativeStart.main(Native Method)
02-11 09:06:55.293: I/Process(1088): Sending signal. PID: 1088 SIG: 9
02-11 09:21:17.953: D/gralloc_goldfish(1117): Emulator without GPU emulation detected.
02-11 09:22:18.203: D/AndroidRuntime(1117): Shutting down VM
02-11 09:22:18.203: W/dalvikvm(1117): threadid=1: thread exiting with uncaught exception (group=0xb4ad2b90)
02-11 09:22:18.233: E/AndroidRuntime(1117): FATAL EXCEPTION: main
02-11 09:22:18.233: E/AndroidRuntime(1117): Process: com.example.pizza, PID: 1117
02-11 09:22:18.233: E/AndroidRuntime(1117): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.pizza/com.example.pizza.RegActivity}; have you declared this activity in your AndroidManifest.xml?
02-11 09:22:18.233: E/AndroidRuntime(1117): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1628)
02-11 09:22:18.233: E/AndroidRuntime(1117): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1424)
02-11 09:22:18.233: E/AndroidRuntime(1117): at android.app.Activity.startActivityForResult(Activity.java:3423)
02-11 09:22:18.233: E/AndroidRuntime(1117): at android.app.Activity.startActivityForResult(Activity.java:3384)
02-11 09:22:18.233: E/AndroidRuntime(1117): at android.app.Activity.startActivity(Activity.java:3626)
02-11 09:22:18.233: E/AndroidRuntime(1117): at android.app.Activity.startActivity(Activity.java:3594)
02-11 09:22:18.233: E/AndroidRuntime(1117): at com.example.pizza.MainActivity$1.onClick(MainActivity.java:33)
02-11 09:22:18.233: E/AndroidRuntime(1117): at android.view.View.performClick(View.java:4424)
02-11 09:22:18.233: E/AndroidRuntime(1117): at android.view.View$PerformClick.run(View.java:18383)
02-11 09:22:18.233: E/AndroidRuntime(1117): at android.os.Handler.handleCallback(Handler.java:733)
02-11 09:22:18.233: E/AndroidRuntime(1117): at android.os.Handler.dispatchMessage(Handler.java:95)
02-11 09:22:18.233: E/AndroidRuntime(1117): at android.os.Looper.loop(Looper.java:137)
02-11 09:22:18.233: E/AndroidRuntime(1117): at android.app.ActivityThread.main(ActivityThread.java:4998)
02-11 09:22:18.233: E/AndroidRuntime(1117): at java.lang.reflect.Method.invokeNative(Native Method)
02-11 09:22:18.233: E/AndroidRuntime(1117): at java.lang.reflect.Method.invoke(Method.java:515)
02-11 09:22:18.233: E/AndroidRuntime(1117): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777)
02-11 09:22:18.233: E/AndroidRuntime(1117): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593)
02-11 09:22:18.233: E/AndroidRuntime(1117): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：1)
RegActivity中AndroidManifest.xml的拼写错误。
更改
<activity android:name=".RegAcitvity"/>
到
<activity android:name=".RegActivity"/>
或您的Activity名称
答案 1 :(得分：1)
你有印刷错误的RegActivity。在AndroidManifest.xml中更改此行
<activity android:name=".RegAcitvity"/>
这一行
<activity android:name=".RegActivity"/>