handler thread

Question

按网上步骤写了点代码，运行不了
------------------------------------------------------------
package handlerThread.com;import android.app.Activity;
import android.os.Bundle;
import android.os.HandlerThread;
import android.os.Message;public class Handlertest extends Activity{ /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        System.out.println("Activity-->"+Thread.currentThread().getId());
        HandlerThread handlerThread = new HandlerThread("handler_thread");
        handlerThread.start();
        MyHandler myHandler = new MyHandler(handlerThread.getLooper());
        Message msg = myHandler.obtainMessage();
        Bundle b = new Bundle();
        b.putInt("age", 20);
        b.putString("name","Jhon");
        msg.setData(b);
        msg.sendToTarget();
    }
}----------------------------------------------------------------------
package handlerThread.com;import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;public class MyHandler extends Handler{
public MyHandler(Looper looper) {
// TODO Auto-generated constructor stub
super(looper);
}
@Override
public void handleMessage(Message msg){
Bundle b = msg.getData();
int age = b.getInt("age");
String name = b.getString("name");
System.out.println("age is"+age+",name is"+name);
System.out.println("Handler-->"+Thread.currentThread().getId());
System.out.println("handlerMessage");
}
}------------------------------------------------------------------Logcat如下:
03-02 08:11:41.040: ERROR/AndroidRuntime(865): FATAL EXCEPTION: main
03-02 08:11:41.040: ERROR/AndroidRuntime(865): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{handlerThread.com/handlerThread.com.HandlerThread}: java.lang.ClassNotFoundException: handlerThread.com.HandlerThread in loader dalvik.system.PathClassLoader[/data/app/handlerThread.com-1.apk]
03-02 08:11:41.040: ERROR/AndroidRuntime(865):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
03-02 08:11:41.040: ERROR/AndroidRuntime(865):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
03-02 08:11:41.040: ERROR/AndroidRuntime(865):     at android.app.ActivityThread.access$2300(ActivityThread.java:125)
03-02 08:11:41.040: ERROR/AndroidRuntime(865):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
03-02 08:11:41.040: ERROR/AndroidRuntime(865):     at android.os.Handler.dispatchMessage(Handler.java:99)
03-02 08:11:41.040: ERROR/AndroidRuntime(865):     at android.os.Looper.loop(Looper.java:123)
03-02 08:11:41.040: ERROR/AndroidRuntime(865):     at android.app.ActivityThread.main(ActivityThread.java:4627)
03-02 08:11:41.040: ERROR/AndroidRuntime(865):     at java.lang.reflect.Method.invokeNative(Native Method)
03-02 08:11:41.040: ERROR/AndroidRuntime(865):     at java.lang.reflect.Method.invoke(Method.java:521)
03-02 08:11:41.040: ERROR/AndroidRuntime(865):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
03-02 08:11:41.040: ERROR/AndroidRuntime(865):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
03-02 08:11:41.040: ERROR/AndroidRuntime(865):     at dalvik.system.NativeStart.main(Native Method)
03-02 08:11:41.040: ERROR/AndroidRuntime(865): Caused by: java.lang.ClassNotFoundException: handlerThread.com.HandlerThread in loader dalvik.system.PathClassLoader[/data/app/handlerThread.com-1.apk]
03-02 08:11:41.040: ERROR/AndroidRuntime(865):     at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
03-02 08:11:41.040: ERROR/AndroidRuntime(865):     at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
03-02 08:11:41.040: ERROR/AndroidRuntime(865):     at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
03-02 08:11:41.040: ERROR/AndroidRuntime(865):     at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
03-02 08:11:41.040: ERROR/AndroidRuntime(865):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
03-02 08:11:41.040: ERROR/AndroidRuntime(865):     ... 11 more
求帮助！！！！！！

Answer 1

http://blog.csdn.net/Android_Tutor/archive/2010/05/08/5568806.aspx 写法有问题，参照这篇
文章来改

Answer 2

把public class MyHandler extends Handler放到activity中试一下，是不是的包包含有问题啊

Answer 3

package handlerThread.com;import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Looper;
import android.os.Message;public class Handlertest extends Activity{
public class MyHandler extends Handler{
    public MyHandler() {
      
        }
public MyHandler(Looper looper) {
// TODO Auto-generated constructor stub
super(looper);
}
@Override
public void handleMessage(Message msg){
Bundle b = msg.getData();
int age = b.getInt("age");
String name = b.getString("name");
System.out.println("age is"+age+",name is"+name);
System.out.println("Handler-->"+Thread.currentThread().getId());
System.out.println("handlerMessage");
}
}
/** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        System.out.println("Activity-->"+Thread.currentThread().getId());
        HandlerThread handlerThread = new HandlerThread("handler_thread");
        handlerThread.start();
        MyHandler myHandler = new MyHandler(handlerThread.getLooper());
        Message msg = myHandler.obtainMessage();
        Bundle b = new Bundle();
        b.putInt("age", 20);
        b.putString("name","Jhon");
        msg.setData(b);
        msg.sendToTarget();
    }
}
这样写编译也没有错误，在模拟器里仍然运行不起来求助

Answer 4

这个异常说明 你打包apk里面 没有找到 相应的class, 
java.lang.ClassNotFoundException: handlerThread.com.HandlerThread in loader dalvik.system.PathClassLoader[/data/app/handlerThread.com-1.apk]代码是正常的，，你重新打包试试，，用模拟器跑跑。