你好，Android意外停机

Question

我已经在互联网上搜索了几天，找到了几十种解决方案，但都没有奏效。所以我想我应该把我的情况发布出来：

我已经在我的笔记本电脑上安装了eclipse和2.3.3的android SDK，输入hello world (或者hello android)的代码，然后点击run。模拟器启动，但当活动运行时，我收到消息“对不起！应用程序Hello Android (进程com.example helloandroid)意外停止。请重试”。

package com.example.helloandroid;

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

public class HelloAndroid extends Activity {
   /** Called when the activity is first created. */
   @Override
   public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       TextView tv = new TextView(this);
       tv.setText("Hello, Android");
       setContentView(tv);
   }
}

这是原木猫

02-03 12:54:59.470: D/AndroidRuntime(356): Shutting down VM
02-03 12:54:59.470: W/dalvikvm(356): threadid=1: thread exiting with uncaught exception (group=0x40015560)
02-03 12:54:59.521: E/AndroidRuntime(356): FATAL EXCEPTION: main
02-03 12:54:59.521: E/AndroidRuntime(356): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.helloandroid/com.example.helloandroid.HelloAndroidActivity}: java.lang.ClassNotFoundException: com.example.helloandroid.HelloAndroidActivity in loader dalvik.system.PathClassLoader[/data/app/com.example.helloandroid-1.apk]
02-03 12:54:59.521: E/AndroidRuntime(356):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1569)
02-03 12:54:59.521: E/AndroidRuntime(356):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
02-03 12:54:59.521: E/AndroidRuntime(356):  at android.app.ActivityThread.access$1500(ActivityThread.java:117)
02-03 12:54:59.521: E/AndroidRuntime(356):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
02-03 12:54:59.521: E/AndroidRuntime(356):  at android.os.Handler.dispatchMessage(Handler.java:99)
02-03 12:54:59.521: E/AndroidRuntime(356):  at android.os.Looper.loop(Looper.java:123)
02-03 12:54:59.521: E/AndroidRuntime(356):  at android.app.ActivityThread.main(ActivityThread.java:3683)
02-03 12:54:59.521: E/AndroidRuntime(356):  at java.lang.reflect.Method.invokeNative(Native Method)
02-03 12:54:59.521: E/AndroidRuntime(356):  at java.lang.reflect.Method.invoke(Method.java:507)
02-03 12:54:59.521: E/AndroidRuntime(356):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
02-03 12:54:59.521: E/AndroidRuntime(356):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
02-03 12:54:59.521: E/AndroidRuntime(356):  at dalvik.system.NativeStart.main(Native Method)
02-03 12:54:59.521: E/AndroidRuntime(356): Caused by: java.lang.ClassNotFoundException: com.example.helloandroid.HelloAndroidActivity in loader dalvik.system.PathClassLoader[/data/app/com.example.helloandroid-1.apk]
02-03 12:54:59.521: E/AndroidRuntime(356):  at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
02-03 12:54:59.521: E/AndroidRuntime(356):  at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
02-03 12:54:59.521: E/AndroidRuntime(356):  at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
02-03 12:54:59.521: E/AndroidRuntime(356):  at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
02-03 12:54:59.521: E/AndroidRuntime(356):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1561)
02-03 12:54:59.521: E/AndroidRuntime(356):  ... 11 more
02-03 12:59:59.691: I/Process(356): Sending signal. PID: 356 SIG: 9
02-03 13:00:33.371: D/AndroidRuntime(366): Shutting down VM
02-03 13:00:33.371: W/dalvikvm(366): threadid=1: thread exiting with uncaught exception (group=0x40015560)
02-03 13:00:33.431: E/AndroidRuntime(366): FATAL EXCEPTION: main
02-03 13:00:33.431: E/AndroidRuntime(366): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.helloandroid/com.example.helloandroid.HelloAndroidActivity}: java.lang.ClassNotFoundException: com.example.helloandroid.HelloAndroidActivity in loader dalvik.system.PathClassLoader[/data/app/com.example.helloandroid-1.apk]
02-03 13:00:33.431: E/AndroidRuntime(366):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1569)
02-03 13:00:33.431: E/AndroidRuntime(366):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1663)
02-03 13:00:33.431: E/AndroidRuntime(366):  at android.app.ActivityThread.access$1500(ActivityThread.java:117)
02-03 13:00:33.431: E/AndroidRuntime(366):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:931)
02-03 13:00:33.431: E/AndroidRuntime(366):  at android.os.Handler.dispatchMessage(Handler.java:99)
02-03 13:00:33.431: E/AndroidRuntime(366):  at android.os.Looper.loop(Looper.java:123)
02-03 13:00:33.431: E/AndroidRuntime(366):  at android.app.ActivityThread.main(ActivityThread.java:3683)
02-03 13:00:33.431: E/AndroidRuntime(366):  at java.lang.reflect.Method.invokeNative(Native Method)
02-03 13:00:33.431: E/AndroidRuntime(366):  at java.lang.reflect.Method.invoke(Method.java:507)
02-03 13:00:33.431: E/AndroidRuntime(366):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
02-03 13:00:33.431: E/AndroidRuntime(366):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
02-03 13:00:33.431: E/AndroidRuntime(366):  at dalvik.system.NativeStart.main(Native Method)
02-03 13:00:33.431: E/AndroidRuntime(366): Caused by: java.lang.ClassNotFoundException: com.example.helloandroid.HelloAndroidActivity in loader dalvik.system.PathClassLoader[/data/app/com.example.helloandroid-1.apk]
02-03 13:00:33.431: E/AndroidRuntime(366):  at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
02-03 13:00:33.431: E/AndroidRuntime(366):  at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
02-03 13:00:33.431: E/AndroidRuntime(366):  at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
02-03 13:00:33.431: E/AndroidRuntime(366):  at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
02-03 13:00:33.431: E/AndroidRuntime(366):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1561)
02-03 13:00:33.431: E/AndroidRuntime(366):  ... 11 more
02-03 13:05:33.600: I/Process(366): Sending signal. PID: 366 SIG: 9

Answer 1

仿真器的设置方式似乎有问题。你有没有遵循这个tutorial，特别是“设置AVD”的部分？

我会重新开始安装仿真器。此外，您还可以向他发送一份您的程序的副本，如果他可以在仿真器中成功运行您的项目，那么您只需要正确设置您的仿真器。

Answer 2

尝试将setContentView()方法移到文本视图初始化之上