我的应用程序中有5个选项卡，登录后默认加载第一个选项卡，但是当我点击其他选项卡时，我基本上从服务器获取数据，我需要显示进度条，我无法抓住保持新的单击选项卡，我可以使用getcurrentTab（）获取当前选项卡单击。请帮帮我这个。以下是我正在使用的代码。
Thanks
Max
package com.sof.android;
import android.app.AlertDialog;
import android.app.TabActivity;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.res.Resources;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.widget.Button;
import android.widget.TabHost;
import android.widget.TextView;
import android.widget.Toast;
public class Home extends TabActivity {
TabHost tabHost;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.home);
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.home_title);
// Ask New Question
TextView username = (TextView) findViewById(R.id.usernameBar);
username.setText(Global.username);
//Logout
Button logOut = (Button) this.findViewById(R.id.logoutBar);
logOut.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
AlertDialog.Builder builder = new AlertDialog.Builder(Home.this);
builder.setMessage("Are you sure you want to Log Out?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
finish();
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
alert.show();
}
});
Resources res = getResources(); // Resource object to get Drawables
tabHost = getTabHost(); // The activity TabHost
TabHost.TabSpec spec; // Resusable TabSpec for each tab
Intent intent; // Reusable Intent for each tab
// Create an Intent to launch an Activity for the tab (to be reused)
intent = new Intent().setClass(this, a.class);
// Initialize a TabSpec for each tab and add it to the TabHost
spec = tabHost.newTabSpec("artists").setIndicator("Home",
res.getDrawable(R.drawable.a))
.setContent(intent);
tabHost.addTab(spec);
// Do the same for the other tabs
intent = new Intent().setClass(this, b.class);
spec = tabHost.newTabSpec("albums").setIndicator("Ask",
res.getDrawable(R.drawable.b))
.setContent(intent);
tabHost.addTab(spec);
intent = new Intent().setClass(this, c.class);
spec = tabHost.newTabSpec("songs").setIndicator("Questions",
res.getDrawable(R.drawable.c))
.setContent(intent);
tabHost.addTab(spec);
intent = new Intent().setClass(this, d.class);
spec = tabHost.newTabSpec("tutorial").setIndicator("Tutorials",
res.getDrawable(R.drawable.d))
.setContent(intent);
tabHost.addTab(spec);
intent = new Intent().setClass(this, e.class);
spec = tabHost.newTabSpec("account").setIndicator("Account",
res.getDrawable(R.drawable.e))
.setContent(intent);
tabHost.addTab(spec);
tabHost.setCurrentTab(0);
getTabWidget().getChildAt(getTabHost().getCurrentTab()).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(getTabHost().getCurrentTab() == 1){
System.out.println("home home home");
tabHost.setCurrentTab(0);
}
if(getTabHost().getCurrentTab() == 2){
System.out.println("i am clicking tabs now overrided method");
}
//do whatever you need
}
});
/*
tabHost.setOnTabChangedListener(new OnTabChangeListener(){
@Override
public void onTabChanged(String tabId) {
if(TAB_1_TAG.equals(tabId)) {
//destroy earth
}
if(TAB_2_TAG.equals(tabId)) {
//destroy mars
}
}});
*/
}
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK) {
//preventing default implementation previous to android.os.Build.VERSION_CODES.ECLAIR
Toast.makeText(getApplicationContext(), "Please Use Log Out.", Toast.LENGTH_LONG).show();
return true;
}
return super.onKeyDown(keyCode, event);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.icon:
/*try{
Intent previewMessage = new Intent(Home.this, a.class);
System.out.println("preview message "+previewMessage);
TabGroupActivity parentActivity = new TabGroupActivity();
System.out.println("parentActivity message "+parentActivity);
parentActivity.startChildActivity("home", Global.aIns);
}catch(Exception ex){
System.out.println("Caought exception :- "+ex.getMessage());
}*/
tabHost.setCurrentTab(0);
break;
case R.id.text: AlertDialog.Builder builder = new AlertDialog.Builder(Home.this);
builder.setMessage("Are you sure you want to Log Out?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
finish();
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
alert.show();
break;
case R.id.icontext: //Intent Account = new Intent(Home.this, e.class);
//a aIns = new a();
/*System.out.println("Global.eInsObject is" +Global.eInsObject);
System.out.println("Global.eIns is" +Global.eIns);
TabGroupActivity parentActivityE = (TabGroupActivity) Global.eInsObject;
//System.out.println("parentActivityE is "+parentActivityE);
parentActivityE.startChildActivity("myAccount", Global.eIns);
//parentActivityE.switchTabs("myaccount",);
//Window window = getLocalActivityManager().startActivity("myaccount",Account.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
// if (window != null) {
// Global.mIdList.add("myaccount");
// try{
// setContentView(window.getDecorView());
// }catch(Exception ex){
// System.out.println("exception is "+ex.getMessage());
// }
//}
*/
tabHost.setCurrentTab(4);
break;
}
return true;
}
}