eclipse下提交job时报错mapred.JobClient: No job jar file set. User classes may not be found.

Android TabWidget/TabHost有两种使用方法：

第一种：使用系统自带写好的TabHost（及继承自TabActivity类）具体代码如下:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout android:id="@+id/tab1"
android:layout_width="fill_parent" android:layout_height="fill_parent"
androidrientation="vertical">
<TextView android:id="@+id/TextView1"
android:text="This is a tab1" android:layout_width="fill_parent"
android:layout_height="wrap_content">
</TextView>
</LinearLayout>
<LinearLayout android:id="@+id/tab2"
android:layout_width="fill_parent" android:layout_height="fill_parent"
androidrientation="vertical">
<TextView android:id="@+id/TextView2"
android:text="This is a tab2" android:layout_width="fill_parent"
android:layout_height="wrap_content">
</TextView>
</LinearLayout>
<LinearLayout android:id="@+id/tab3"
android:layout_width="fill_parent" android:layout_height="fill_parent"
androidrientation="vertical">
<TextView android:id="@+id/TextView3"
android:text="This is a tab3" android:layout_width="fill_parent"
android:layout_height="wrap_content">
</TextView>
</LinearLayout>
</FrameLayout>

package com.Aina.Android;

import android.app.AlertDialog;
import android.app.Dialog;
import android.app.TabActivity;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.widget.TabHost;

public class Test_TabWidget extends TabActivity {
/** Called when the activity is first created. */
private TabHost tabHost;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// setContentView(R.layout.main);
tabHost = this.getTabHost();
LayoutInflater li = LayoutInflater.from(this);
li.inflate(R.layout.main, tabHost.getTabContentView(), true);
tabHost.addTab(tabHost.newTabSpec("Tab_1").setContent(R.id.tab1)
.setIndicator("TAB1",
this.getResources().getDrawable(R.drawable.img1)));
tabHost.addTab(tabHost.newTabSpec("Tab_2").setContent(R.id.tab2)
.setIndicator("TAB2",
this.getResources().getDrawable(R.drawable.img2)));
tabHost.addTab(tabHost.newTabSpec("Tab_3").setContent(R.id.tab3)
.setIndicator("TAB3",
this.getResources().getDrawable(R.drawable.img3)));
tabHost.setCurrentTab(1);
//		tabHost.setBackgroundColor(Color.GRAY);
tabHost.setOnTabChangedListener(new TabHost.OnTabChangeListener() {

public void onTabChanged(String tabId) {
Dialog dialog = new AlertDialog.Builder(Test_TabWidget.this)
.setTitle("提示").setMessage(
"选中了" + tabId + "选项卡").setIcon(R.drawable.icon).setPositiveButton("确定", new DialogInterface.OnClickListener(){

public void onClick(DialogInterface dialog,
int which) {
// TODO Auto-generated method stub

}

}).create();
dialog.show();

}

});
}
}

第二种：就是定义我们自己的tabHost：不用继承TabActivity，具体代码如下:

<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/TabHost01" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout android:layout_width="fill_parent"
android:orientation="vertical" android:layout_height="fill_parent">
<TabWidget android:id="@android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<FrameLayout android:id="@android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout android:id="@+id/LinearLayout1"
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView android:text="one"
android:id="@+id/TextView01" android:layout_width="wrap_content"
android:layout_height="wrap_content">
</TextView>
</LinearLayout>
<LinearLayout android:id="@+id/LinearLayout2"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView android:text="two"
android:id="@+id/TextView02" android:layout_width="fill_parent"
android:layout_height="wrap_content">
</TextView>
</LinearLayout>
<LinearLayout android:id="@+id/LinearLayout3"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView android:text="three"
android:id="@+id/TextView03" android:layout_width="fill_parent"
android:layout_height="wrap_content">
</TextView>
</LinearLayout>
</FrameLayout>
</LinearLayout>
</TabHost>

package com.Aina.Android;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.widget.TabHost;

public class Test_TabHost extends Activity {
/** Called when the activity is first created. */
private TabHost tabHost;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
try{
tabHost = (TabHost) this.findViewById(R.id.TabHost01);
tabHost.setup();

tabHost.addTab(tabHost.newTabSpec("tab_1")
.setContent(R.id.LinearLayout1)
.setIndicator("TAB1",this.getResources().getDrawable(R.drawable.img1)));
tabHost.addTab(tabHost.newTabSpec("tab_2")
.setContent(R.id.LinearLayout2).setIndicator("TAB2",
this.getResources().getDrawable(R.drawable.img2)));
tabHost.addTab(tabHost.newTabSpec("tab_3")
.setContent(R.id.LinearLayout3).setIndicator("TAB3",
this.getResources().getDrawable(R.drawable.img3)));
tabHost.setCurrentTab(1);
}catch(Exception ex){
ex.printStackTrace();
Log.d("EXCEPTION", ex.getMessage());
}

}
}

注意：第二种方法时布局文件中的TabWidget的id必须定义为：android:id="@android:id/tabs"，FrameLayout的id必须定义为：android:id="@android:id/tabcontent" 其它控件没有限制，否则报错。