1
我正在开发一个应用程序。从我的应用程序加载web broser时出现可序列化的崩溃错误
本申请含有2类
- 它实现序列化
发现类
延伸活动
在主类我请涉及的机器人的网络浏览器的主要类点击应用程序界面中的按钮。这种行为会导致崩溃。
波纹管是代码：
MainTest.java
package com.heeere.androiddnssd.discovery;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class MainTest extends Activity {
android.net.wifi.WifiManager.MulticastLock lock;
private Discovery discovery;
private TextView textView;
/** Called when the activity is first created. */
@SuppressLint("NewApi") @Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState == null)
discovery = new Discovery(this);
else
discovery = (Discovery) savedInstanceState.getSerializable("discovery");
setContentView(R.layout.main);
textView = (TextView)this.findViewById(R.id.text);
Button b = (Button)this.findViewById(R.id.button);
b.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
//discovery.setUp();
Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.google.com"));
startActivity(browserIntent);
}
});
android.net.wifi.WifiManager wifi = (android.net.wifi.WifiManager) getSystemService(android.content.Context.WIFI_SERVICE);
lock = wifi.createMulticastLock("mylockthereturn");
lock.setReferenceCounted(true);
lock.acquire();
}
@Override
protected void onSaveInstanceState(final Bundle outState) {
outState.putSerializable("discovery", discovery);
super.onSaveInstanceState(outState);
}
public void updateView() {
String msg = discovery.getMsg();
textView.setText(msg);
}
@SuppressLint("NewApi") @Override
protected void onStop() {
discovery.stop();
lock.release();
super.onStop();
}
}
Discovery.java
package com.heeere.androiddnssd.discovery;
import java.io.IOException;
import java.io.Serializable;
import javax.jmdns.JmDNS;
import javax.jmdns.ServiceEvent;
import javax.jmdns.ServiceListener;
public class Discovery implements Serializable {
private static final long serialVersionUID = 637576886455091135L;
private String type = "_ikunet._tcp.local.";
private String msg="";
private JmDNS jmdns = null;
private ServiceListener listener = null;
private MainTest maintest;
android.os.Handler handler = new android.os.Handler();
public Discovery (MainTest maintest) {
this.maintest = maintest;
setUp();
}
public void setUp() {
try {
jmdns = JmDNS.create();
jmdns.addServiceListener(type, listener = new ServiceListener() {
public void serviceResolved(ServiceEvent ev) {
msg = msg + ev.getInfo().getName()+ "\n";
update();
}
public void serviceRemoved(ServiceEvent ev) {
}
public void serviceAdded(ServiceEvent event) {
jmdns.requestServiceInfo(event.getType(), event.getName(), 1);
}
});
} catch (IOException e) {
//e.printStackTrace();
return;
}
}
public String getMsg() {
return msg;
}
private void update() {
handler.postDelayed(new Runnable() {
public void run() {
maintest.updateView();
}
}, 1);
}
public void stop() {
if (jmdns != null) {
if (listener != null) {
jmdns.removeServiceListener(type, listener);
listener = null;
}
jmdns.unregisterAllServices();
try {
jmdns.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
jmdns = null;
}
}
}
logcat的
09-13 15:08:30.507: E/AndroidRuntime(15775): Uncaught handler: thread main exiting due to uncaught exception
09-13 15:08:30.517: E/AndroidRuntime(15775): java.lang.RuntimeException: Parcelable encountered IOException writing serializable object (name = com.heeere.androiddnssd.discovery.Discovery)
09-13 15:08:30.517: E/AndroidRuntime(15775): at android.os.Parcel.writeSerializable(Parcel.java:1131)
09-13 15:08:30.517: E/AndroidRuntime(15775): at android.os.Parcel.writeValue(Parcel.java:1085)
09-13 15:08:30.517: E/AndroidRuntime(15775): at android.os.Parcel.writeMapInternal(Parcel.java:469)
09-13 15:08:30.517: E/AndroidRuntime(15775): at android.os.Bundle.writeToParcel(Bundle.java:1445)
09-13 15:08:30.517: E/AndroidRuntime(15775): at android.os.Parcel.writeBundle(Parcel.java:483)
09-13 15:08:30.517: E/AndroidRuntime(15775): at android.app.ActivityManagerProxy.activityPaused(ActivityManagerNative.java:1427)
09-13 15:08:30.517: E/AndroidRuntime(15775): at android.app.ActivityThread.handlePauseActivity(ActivityThread.java:3106)
09-13 15:08:30.517: E/AndroidRuntime(15775): at android.app.ActivityThread.access$2400(ActivityThread.java:119)
09-13 15:08:30.517: E/AndroidRuntime(15775): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1870)
09-13 15:08:30.517: E/AndroidRuntime(15775): at android.os.Handler.dispatchMessage(Handler.java:99)
09-13 15:08:30.517: E/AndroidRuntime(15775): at android.os.Looper.loop(Looper.java:123)
09-13 15:08:30.517: E/AndroidRuntime(15775): at android.app.ActivityThread.main(ActivityThread.java:4363)
09-13 15:08:30.517: E/AndroidRuntime(15775): at java.lang.reflect.Method.invokeNative(Native Method)
09-13 15:08:30.517: E/AndroidRuntime(15775): at java.lang.reflect.Method.invoke(Method.java:521)
09-13 15:08:30.517: E/AndroidRuntime(15775): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
09-13 15:08:30.517: E/AndroidRuntime(15775): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
09-13 15:08:30.517: E/AndroidRuntime(15775): at dalvik.system.NativeStart.main(Native Method)
09-13 15:08:30.517: E/AndroidRuntime(15775): Caused by: java.io.NotSerializableException: android.os.Handler
09-13 15:08:30.517: E/AndroidRuntime(15775): at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1547)
09-13 15:08:30.517: E/AndroidRuntime(15775): at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1854)
09-13 15:08:30.517: E/AndroidRuntime(15775): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1696)
09-13 15:08:30.517: E/AndroidRuntime(15775): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1660)
09-13 15:08:30.517: E/AndroidRuntime(15775): at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:1153)
09-13 15:08:30.517: E/AndroidRuntime(15775): at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:420)
09-13 15:08:30.517: E/AndroidRuntime(15775): at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1251)
09-13 15:08:30.517: E/AndroidRuntime(15775): at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1587)
09-13 15:08:30.517: E/AndroidRuntime(15775): at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1854)
09-13 15:08:30.517: E/AndroidRuntime(15775): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1696)
09-13 15:08:30.517: E/AndroidRuntime(15775): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1660)
09-13 15:08:30.517: E/AndroidRuntime(15775): at android.os.Parcel.writeSerializable(Parcel.java:1126)
09-13 15:08:30.517: E/AndroidRuntime(15775): ... 16 more
您应该创建另一个只包含数据的类，而不需要额外的逻辑。 – dmon
我新安装在android和java中。有可能是更具体的或给我一个例子 – MOHAMED
崩溃原因不是处理程序。请参阅此链接看到rel问题：http://stackoverflow.com/questions/12411012/crash-due-to-passing-context-to-a-serializable-class – MOHAMED