Android Handler Message和ListView

概述我现在对于LONG的帖子表示歉意,但这是我唯一可以解释的方法,而google提供了3页结果并不是决定性的 这是我的错误家伙： *** Uncaught remote exception! (Exceptions are not yet supported across processes.)android.util.AndroidRuntimeException: { what=1008 wh 我现在对于LONG的帖子表示歉意,但这是我唯一可以解释的方法,而Google提供了3页结果并不是决定性的

这是我的错误家伙：

*** Uncaught remote exception!  (Exceptions are not yet supported across processes.)androID.util.AndroIDRuntimeException: { what=1008 when=368280372 } This message is already in use.at androID.os.MessageQueue.enqueueMessage(MessageQueue.java:171)at androID.os.Handler.sendMessageAtTime(Handler.java:457)at androID.os.Handler.sendMessageDelayed(Handler.java:430)at androID.os.Handler.sendMessage(Handler.java:367)at androID.vIEw.VIEwRoot.dispatchAppVisibility(VIEwRoot.java:2748)

我正在尝试的是一个列表视图,由自定义列表项填充,每个列表项有多个视图,每个视图都附加了一个onclick侦听器.当这个onClickListener被按下时,它会向一个处理程序发送一个带有what和arg1参数的消息.
单击我的一个元素将触发启动新活动的意图.
点击另一个显示吐司.
当这些被组合按下时,我得到上面的错误.即点击文字来触发意图(然后按回车),然后点击图像显示吐司,然后当您点击文字再次触发意图时,我会得到FC.

我创建了一个演示项目,再现这个：
http://rapidshare.com/files/429227042/HandlerTest.rar

这里是下面的代码,我试图删除尽可能多的cruft,我可以得到的错误的骨头：

如果你想跳过什么重要的看看onClickListener在ConversationAdapter.class和他们如何与StartPage.class

AndroID清单：

<?xml version="1.0" enCoding="utf-8"?>  <manifest xmlns:androID="http://schemas.androID.com/apk/res/androID"    package="com.handler.test"    androID:versionCode="1"    androID:versionname="1.0">      <application androID:icon="@drawable/icon" androID:label="@string/app_name">        <activity androID:name=".StartPage"              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=".DetailsPage"        androID:label="DetailsPage"        >    </activity>     </application>    <uses-sdk androID:minSdkVersion="3" /></manifest>

StartPage.class：

package com.handler.test;import java.util.ArrayList;import androID.app.ListActivity;import androID.app.ProgressDialog;import androID.content.Context;import androID.content.Intent;import androID.os.Bundle;import androID.os.Handler;import androID.os.Message;import androID.util.Log;import androID.Widget.Toast;public class StartPage extends ListActivity {private ArrayList<Conversation> mConversations = null;private ConversationAdapter mAdapter;private Context mContext;private ProgressDialog mProgressDialog;/** Called when the activity is first created. */@OverrIDepublic voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.main);    mContext = this;    mConversations = new ArrayList<Conversation>();    this.mAdapter = new ConversationAdapter(mContext,R.layout.inBox_row,mConversations,mHandler);    setlistadapter(this.mAdapter);    new Thread(new Runnable() {        @OverrIDe        public voID run() {            getConversations();        }    }).start();    mProgressDialog = ProgressDialog.show(StartPage.this,"Please wait...","RetrIEving data ...",true);}private voID getConversations() {    try {        mConversations = new ArrayList<Conversation>();        Conversation o1 = new Conversation();        o1.setStatus("SF services");        o1.setMessage("Pending");                   mConversations.add(o1);    } catch (Exception e) {        Log.e("BACKGROUND_PROC",e.getMessage());    }    runOnUiThread(returnRes);}private Runnable returnRes = new Runnable() {    @OverrIDe    public voID run() {        if(mConversations != null && mConversations.size() > 0){            mAdapter.notifyDataSetChanged();            for(int i=0;i<mConversations.size();i++)                mAdapter.add(mConversations.get(i));        }        mProgressDialog.dismiss();        mAdapter.notifyDataSetChanged();    }  };private Handler mHandler = new Handler(){    @OverrIDe    public voID handleMessage(Message msg) {        int convIndex = msg.arg1;        int vIEwtouched = msg.what;        switch(vIEwtouched){            case ConversationAdapter.PROF_ICON:                showNumber(convIndex);            break;            case ConversationAdapter.MESSAGE:                showMessageDetails(convIndex);            break;        }        super.handleMessage(msg);    }};private voID showNumber(int convIndex) {    Toast.makeText(mContext,"pressed: "+convIndex,Toast.LENGTH_LONG).show();}private voID showMessageDetails(int convIndex) {    final Conversation conv = mConversations.get(convIndex);    Intent i = new Intent(mContext,DetailsPage.class);    i.putExtra("someExtra",conv);    startActivity(i);}}

DetailsPage.class

package com.handler.test;import androID.app.Activity;import androID.os.Bundle;import androID.util.Log;public class DetailsPage extends Activity {@OverrIDeprotected voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.main);    Log.i("Test","Details Page");      }}

Conversation.class：

package com.handler.test;import java.io.Serializable;public class Conversation implements Serializable {private static final long serialVersionUID = -437261671361122258L;private String status;public String getStatus() {    return status;}public voID setStatus(String status) {    this.status = status;}}

ConversationAdapter.class：

package com.handler.test;import java.util.ArrayList;import androID.content.Context;import androID.os.Handler;import androID.os.Message;import androID.vIEw.LayoutInflater;import androID.vIEw.VIEw;import androID.vIEw.VIEwGroup;import androID.Widget.ArrayAdapter;import androID.Widget.ImageVIEw;import androID.Widget.linearLayout;public class ConversationAdapter extends ArrayAdapter<Conversation> {public static final int PROF_ICON = 0;public static final int MESSAGE = 1;private Context mContext;private Handler mHandler;private ArrayList<Conversation> mItems;private int mXmlID;private linearLayout detailsOfConv;private ImageVIEw iconImage;public ConversationAdapter(Context context,int textVIEwResourceID,ArrayList<Conversation> items,Handler handler) {    super(context,textVIEwResourceID,items);    this.mContext = context;    this.mItems = items;    this.mXmlID = textVIEwResourceID;    this.mHandler = handler;}@OverrIDepublic VIEw getVIEw(int position,VIEw convertVIEw,VIEwGroup parent) {    VIEw v = convertVIEw;    if (v == null) {        LayoutInflater vi = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);        v = vi.inflate(mXmlID,null);    }    final Message m = new Message();    m.arg1 = position;    Conversation c = mItems.get(position);    if (c != null) {        iconImage = (ImageVIEw) v.findVIEwByID(R.ID.icon);        if (iconImage != null) {            iconImage.setonClickListener(new VIEw.OnClickListener() {                @OverrIDe                public voID onClick(VIEw v) {                    m.what = PROF_ICON;                    mHandler.sendMessage(m);                }            });        }        detailsOfConv = (linearLayout) v.findVIEwByID(R.ID.details);        if(detailsOfConv != null){            detailsOfConv.setonClickListener(new VIEw.OnClickListener() {                @OverrIDe                public voID onClick(VIEw v) {                    m.what = MESSAGE;                    mHandler.sendMessage(m);                }            });        }    }    return v;}}

main.xml中：

<?xml version="1.0" enCoding="utf-8"?><linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"androID:orIEntation="vertical"androID:layout_wIDth="fill_parent"androID:layout_height="fill_parent"androID:padding="10dip"><ListVIEw androID:ID="@+ID/androID:List" androID:layout_wIDth="wrap_content" androID:layout_height="wrap_content" androID:cachecolorHint="#00000000" /></linearLayout>

inBox_row.xml：

<?xml version="1.0" enCoding="utf-8"?><linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"  androID:layout_wIDth="fill_parent"  androID:layout_height="?androID:attr/ListPreferredItemHeight"  androID:padding="6dip">  <ImageVIEw    androID:ID="@+ID/icon"    androID:layout_wIDth="wrap_content"    androID:layout_height="fill_parent"    androID:layout_marginRight="6dip"    androID:src="@drawable/icon" />  <linearLayout    androID:ID="@+ID/details"    androID:orIEntation="vertical"    androID:layout_wIDth="0dip"    androID:layout_weight="1"    androID:layout_height="fill_parent">    <TextVIEw        androID:ID="@+ID/toptext"        androID:textcolor="#99FF66"        androID:layout_wIDth="fill_parent"        androID:layout_height="0dip"        androID:layout_weight="1"        androID:singleline="true"        androID:text="123456789"        />         </linearLayout></linearLayout>

对不起,所有的代码！

解决方法 我的猜测是,你发送两次相同的信息.实际上在代码中有一个新的Message()和两个mHandler.sendMessage(m)可能都被执行.

尝试在每次发送消息时发出新消息.

编辑：

Message.obtain()比Message m = new Message()更好(因为它回收了使用过的消息)

在您的情况下,如果需要现有消息的副本,则可以使用new.copyFrom(old).

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