Question

安卓开发，很抱歉，应用程序意外停止，请重试 添加了按钮，一按按钮就报错

11-28 05:09:08.141: D/AndroidRuntime(279): Shutting down VM
11-28 05:09:08.141: W/dalvikvm(279): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
11-28 05:09:08.161: E/AndroidRuntime(279): FATAL EXCEPTION: main
11-28 05:09:08.161: E/AndroidRuntime(279): android.content.ActivityNotFoundException: Unable to find explicit activity class {com.example.activity/ activity.Activity01}; have you declared this activity in your AndroidManifest.xml?
11-28 05:09:08.161: E/AndroidRuntime(279): at android.app.Instrumentation.checkStartActivityResult(Instrumentation.java:1404)
11-28 05:09:08.161: E/AndroidRuntime(279): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1378)
11-28 05:09:08.161: E/AndroidRuntime(279): at android.app.Activity.startActivityForResult(Activity.java:2817)
11-28 05:09:08.161: E/AndroidRuntime(279): at android.app.Activity.startActivity(Activity.java:2923)
11-28 05:09:08.161: E/AndroidRuntime(279): at activity.MainActivity.onClick(MainActivity.java:46)
11-28 05:09:08.161: E/AndroidRuntime(279): at android.view.View.performClick(View.java:2408)
11-28 05:09:08.161: E/AndroidRuntime(279): at android.view.View$PerformClick.run(View.java:8816)
11-28 05:09:08.161: E/AndroidRuntime(279): at android.os.Handler.handleCallback(Handler.java:587)
11-28 05:09:08.161: E/AndroidRuntime(279): at android.os.Handler.dispatchMessage(Handler.java:92)
11-28 05:09:08.161: E/AndroidRuntime(279): at android.os.Looper.loop(Looper.java:123)
11-28 05:09:08.161: E/AndroidRuntime(279): at android.app.ActivityThread.main(ActivityThread.java:4627)
11-28 05:09:08.161: E/AndroidRuntime(279): at java.lang.reflect.Method.invokeNative(Native Method)
11-28 05:09:08.161: E/AndroidRuntime(279): at java.lang.reflect.Method.invoke(Method.java:521)
11-28 05:09:08.161: E/AndroidRuntime(279): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
11-28 05:09:08.161: E/AndroidRuntime(279): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
11-28 05:09:08.161: E/AndroidRuntime(279): at dalvik.system.NativeStart.main(Native Method)

Answer 1

上面说你没有在项目清单文件 AndroidManifest.xml 中配置 Activity01 所以点击按钮时找不到就报错了。

在  AndroidManifest.xml 清单文件 application 标签下面 添加配置

<activity
            android:name="com.example.activity.Activity01"
            android:screenOrientation="portrait" />

Answer 2

很明显的，你的activity么有在mainfest中注册

追问

我这样设置了为啥还是不行呀

追答

亲，你会注册吗？注册activity的时候要加上包名和activity名称