我有一个标签布局，活动显示在frameLayout中。 如何通过再次单击“Home”-Tab？
重新加载Tab“Home”中的当前活动public class TabTestActivity extends TabActivity implements OnClickListener{
TabHost tabHost;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//MENÜ////////////////////////////////////////////
/** TabHost will have Tabs */
tabHost = (TabHost)findViewById(android.R.id.tabhost);
/** tid1 is firstTabSpec Id. Its used to access outside. */
TabSpec firstTabSpec = tabHost.newTabSpec("tid1");
TabSpec secondTabSpec = tabHost.newTabSpec("tid2");
TabSpec thirdTabSpec = tabHost.newTabSpec("tid3");
TabSpec fourthTabSpec = tabHost.newTabSpec("tid4");
/** TabSpec setIndicator() is used to set name for the tab. */
/** TabSpec setContent() is used to set content for a particular tab. */
firstTabSpec.setIndicator(new MyView(this, R.drawable.tabhome, "Home")).setContent(new Intent(this,FirstGroup.class));
secondTabSpec.setIndicator(new MyView(this, R.drawable.tabmsg, "MSGs")).setContent(new Intent(this,FirstGroup.class));
thirdTabSpec.setIndicator(new MyView(this, R.drawable.tabprofil, "Profil")).setContent(new Intent(this,FirstGroup.class));
fourthTabSpec.setIndicator(new MyView(this, R.drawable.tabmehr, "Mehr...")).setContent(new Intent(this,FirstGroup.class));
/** Add tabSpec to the TabHost to display. */
tabHost.addTab(firstTabSpec);
tabHost.addTab(secondTabSpec);
tabHost.addTab(thirdTabSpec);
tabHost.addTab(fourthTabSpec);
tabHost.setCurrentTab(0);
}
//LAYOUT OF TABS
private class MyView extends LinearLayout {
public MyView(Context c, int drawable, String label) {
super(c);
LinearLayout la = new LinearLayout(c);
//la.setBackgroundColor(Color.parseColor("#3b5091"));
la.setOrientation(LinearLayout.VERTICAL);
la.setMinimumHeight(63);
la.setPadding(0,8,0,0);
ImageView iv = new ImageView(c);
TextView tv = new TextView(c);
iv.setImageResource(drawable);
setPadding(0,0,2,0);
setOrientation(LinearLayout.VERTICAL);
tv.setText(label);
tv.setGravity(0x01); /* Center */
tv.setTextColor(Color.WHITE);
la.addView(iv);
la.addView(tv);
addView(la);
setBackgroundDrawable( getResources().getDrawable(R.drawable.tab_indicator));
}
}
public class FirstGroup extends ActivityGroup {
// Keep this in a static variable to make it accessible for all the nesten activities, lets them manipulate the view
public static FirstGroup group;
// Need to keep track of the history if you want the back-button to work properly, don't use this if your activities requires a lot of memory.
private ArrayList<View> history;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.history = new ArrayList<View>();
group = this;
// Start the root activity withing the group and get its view
View view = getLocalActivityManager().startActivity("CitiesActivity", new
Intent(this,CitiesActivity.class)
.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP))
.getDecorView();
// Replace the view of this ActivityGroup
replaceView(view);
}
public void replaceView(View v) {
// Adds the old one to history
history.add(v);
// Changes this Groups View to the new View.
setContentView(v);
}
public void back() {
if(history.size() > 0) {
history.remove(history.size()-1);
setContentView(history.get(history.size()-1));
}else {
finish();
}
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if(keyCode == KeyEvent.KEYCODE_BACK)
{
FirstGroup.group.back();
return true;
}
return super.onKeyDown(keyCode, event);
}
}
答案 0 :(得分：1)
我不确定您在寻找什么，但如果您想在用户返回特定标签时更改某些值，则可以在活动的onResume方法中执行此操作。
答案 1 :(得分：1)
我也面临同样的问题，但我这样解决了这个问题...... 这是我的TabActivity类......
public class MainActivity extends TabActivity {
TabHost tabhost;
String cTab = "0";
String nTab;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_main);
tabhost = getTabHost();
TabSpec one = tabhost.newTabSpec("0");
// setting Title and Icon for the Tab
one.setIndicator("", getResources().getDrawable(R.drawable.ic_launcher));
Intent songsIntent = new Intent(this, FirstActivity.class);
one.setContent(songsIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
one.setContent(songsIntent);
TabSpec two = tabhost.newTabSpec("1");
// setting Title and Icon for the Tab
two.setIndicator("", getResources().getDrawable(R.drawable.ic_launcher));
Intent songsIntent1 = new Intent(this, SecondActivity.class);
two.setContent(songsIntent1.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
two.setContent(songsIntent1);
TabSpec three = tabhost.newTabSpec("2");
// setting Title and Icon for the Tab
three.setIndicator("",
getResources().getDrawable(R.drawable.ic_launcher));
Intent songsIntent4 = new Intent(this, ThirdActivity.class);
three.setContent(songsIntent4.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
three.setContent(songsIntent4);
TabSpec four = tabhost.newTabSpec("3");
// setting Title and Icon for the Tab
four.setIndicator("", getResources()
.getDrawable(R.drawable.ic_launcher));
Intent songsIntent5 = new Intent(this, FourthActivity.class);
four.setContent(songsIntent5.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
four.setContent(songsIntent5);
tabhost.addTab(one);
tabhost.addTab(two);
tabhost.addTab(three);
tabhost.addTab(four);
tabhost.setOnTabChangedListener(new OnTabChangeListener() {
@Override
public void onTabChanged(String arg0) {
cTab = "" + tabhost.getCurrentTab();
}
});
int numberOfTabs = tabhost.getTabWidget().getChildCount();
for (int t = 0; t < numberOfTabs; t++) {
tabhost.getTabWidget().getChildAt(t)
.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if (event.getAction() == MotionEvent.ACTION_UP) {
String currentSelectedTag = MainActivity.this
.getTabHost().getCurrentTabTag();
nTab = currentSelectedTag;
System.out.println(" nTab " + nTab);
System.out.println(" cTab " + cTab);
if (cTab.equals(nTab)) {
if (nTab.equals("0")) {
Intent intent = new Intent();
intent.setAction("com.ensis.first");
MainActivity.this.sendBroadcast(intent);
}
if (nTab.equals("1")) {
Intent intent = new Intent();
intent.setAction("com.ensis.second");
MainActivity.this.sendBroadcast(intent);
}
if (nTab.equals("2")) {
Intent intent = new Intent();
intent.setAction("com.ensis.third");
MainActivity.this.sendBroadcast(intent);
}
if (nTab.equals("3")) {
Intent intent = new Intent();
intent.setAction("com.ensis.fourth");
MainActivity.this.sendBroadcast(intent);
}
}
}
return false;
}
});
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}}
这是我的FirstActivity类。
public class FirstActivity extends ActivityGroup{
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
ok();
IntentFilter filter = new IntentFilter("com.ensis.first");
registerReceiver(myReceiver, filter);
/**/
}
private void ok() {
// TODO Auto-generated method stub
setContentView(R.layout.firstscreen);
Button bt=(Button)findViewById(R.id.button1);
bt.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent it=new Intent(FirstActivity.this,SubActivity.class);
replaceContentView("activity3", it);
}
});
}
public void replaceContentView(String id, Intent newIntent) {
View view = getLocalActivityManager().startActivity(id,newIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)).getDecorView();
this.setContentView(view);
}
private BroadcastReceiver myReceiver = new BroadcastReceiver()
{
@Override
public void onReceive(Context context, Intent intent) {
Log.v("22222222222222222", "22222222222");
ok();
}
};}
I don't know whether it is exactly suitable for your answer or not.change the code as your needs...