I have a TabHost application with 4 tabs.
Tab 1
List A > List B > View
Tab 2
Camera Activity which start camera and flash onCreate
Tab 3
List C > View
Tab 4
View D > View E
So, when I first start the app, I can go to different tabs back and forth the stack without any problem. But once I started Tab 2 (camera tab) and I go to other tabs from there and go down the stack and when i press the back button, the camera starts automatically even though I am not at Tab 2 (i.e.: at List B, press back button and camera starts even I just go back to List A) ... and when I go to Tab 2 again, the app will crash (Sorry, the Android camera encountered a problem...etc.)
Can anyone tell me what the problem is? Below is my TabHost activity
package com.myapp.appname;
import android.app.TabActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.TabHost;
import android.widget.TextView;
import android.view.Window;
public class MainActivity extends TabActivity {
/** Called when the activity is first created. */
private TabHost tabHost;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(null);
setContentView(R.layout.main);
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.top_titlebar);
setTabs();
}
private void setTabs() {
tabHost = getTabHost();
listTab(R.string.tab_1, R.drawable.ic_tab_1);
cameraTab(R.string.tab_2, R.drawable.ic_tab_2);
list2Tab(R.string.tab_3, R.drawable.ic_tab_3);
viewTab(R.string.tab_4, R.drawable.ic_tab_4);
}
private void listTab(int labelId, int drawableId) {
Intent intent = new Intent(this,ListActivity.class);
TabHost.TabSpec spec = tabHost.newTabSpec("tab" + labelId);
View tabIndicator = LayoutInflater.from(this).inflate(R.layout.tab_indicator, getTabWidget(), false);
TextView title = (TextView) tabIndicator.findViewById(R.id.title);
title.setText(labelId);
ImageView icon = (ImageView) tabIndicator.findViewById(R.id.icon);
icon.setImageResource(drawableId);
spec.setIndicator(tabIndicator);
spec.setContent(intent);
tabHost.addTab(spec);
}
private void cameraTab(int labelId, int drawableId) {
Intent intent = new Intent(this,CameraActivity.class);
TabHost.TabSpec spec = tabHost.newTabSpec("tab" + labelId);
View tabIndicator = LayoutInflater.from(this).inflate(R.layout.tab_indicator, getTabWidget(), false);
TextView title = (TextView) tabIndicator.findViewById(R.id.title);
title.setText(labelId);
ImageView icon = (ImageView) tabIndicator.findViewById(R.id.icon);
icon.setImageResource(drawableId);
spec.setIndicator(tabIndicator);
spec.setContent(intent);
tabHost.addTab(spec);
}
private void list2Tab(int labelId, int drawableId) {
Intent intent = new Intent(this,List2Activity.class);
TabHost.TabSpec spec = tabHost.newTabSpec("tab" + labelId);
View tabIndicator = LayoutInflater.from(this).inflate(R.layout.tab_indicator, getTabWidget(), false);
TextView title = (TextView) tabIndicator.findViewById(R.id.title);
title.setText(labelId);
ImageView icon = (ImageView) tabIndicator.findViewById(R.id.icon);
icon.setImageResource(drawableId);
spec.setIndicator(tabIndicator);
spec.setContent(intent);
tabHost.addTab(spec);
}
private void viewTab(int labelId, int drawableId) {
Intent intent = new Intent(this,ViewActivity.class);
TabHost.TabSpec spec = tabHost.newTabSpec("tab" + labelId);
View tabIndicator = LayoutInflater.from(this).inflate(R.layout.tab_indicator, getTabWidget(), false);
TextView title = (TextView) tabIndicator.findViewById(R.id.title);
title.setText(labelId);
ImageView icon = (ImageView) tabIndicator.findViewById(R.id.icon);
icon.setImageResource(drawableId);
spec.setIndicator(tabIndicator);
spec.setContent(intent);
tabHost.addTab(spec);
}
}
I don't think that the problem is with tabhost, but with camera. Try moving the code that you have in onCreate into onResume. Also you should worry about releasing the camera when you go to another tab.
Related
Hello I am developing an application
Which requires to add Run Time tabs in the android And all the tabs should add dynamically.
My Requirement is:
I want to add Tabhost with 5 tabs Which Should display the Screen.
But some Time it require only 3 tabs in the screen then design should not change.
Same if I want to add more then 5 tabs then tab should scroll Run time The main Thing is Design should not change.
Can any one tell me How can i do that?
Currently I am using Following Code:
public class Story_List extends ActivityGroup
{
ListView list_stories;
TabHost tab_stories;
#SuppressWarnings("deprecation")
#Override
protected void onCreate(Bundle savedInstanceState)
{
requestWindowFeature(Window.FEATURE_NO_TITLE);
super.onCreate(savedInstanceState);
setContentView(R.layout.story_list);
tab_stories=(TabHost)findViewById(R.id.tabhoststories);
tab_stories.setup(this.getLocalActivityManager());
setupTab1(new TextView(this), "Album 1");
setupTab2(new TextView(this), "Album 2");
setupTab3(new TextView(this), "Album 3");
}
private void setupTab1(final View view, final String tag)
{
View tabview = createTabView(tab_stories.getContext(), tag);
Intent intent = new Intent().setClass(this, StoryAlbum1.class);
TabSpec tab = tab_stories.newTabSpec(tag).setIndicator(tabview).setContent(intent);
tab_stories.addTab(tab);
}
private void setupTab2(final View view, final String tag)
{
View tabview = createTabView(tab_stories.getContext(), tag);
Intent intent = new Intent().setClass(this, StoryAlbum2.class);
TabSpec tab = tab_stories.newTabSpec(tag).setIndicator(tabview).setContent(intent);
tab_stories.addTab(tab);
}
private void setupTab3(final View view, final String tag)
{
View tabview = createTabView(tab_stories.getContext(), tag);
Intent intent = new Intent().setClass(this, StoryAlbum3.class);
TabSpec tab = tab_stories.newTabSpec(tag).setIndicator(tabview).setContent(intent);
tab_stories.addTab(tab);
}
private static View createTabView(final Context context, final String text)
{
View view = LayoutInflater.from(context).inflate(R.layout.tabs_text, null);
TextView tv = (TextView) view.findViewById(R.id.tabsText);
tv.setText(text);
return view;
}
}
try this :
TabHost.TabSpec tabSpec = tabHost.newTabSpec("Tab1");
tabSpec.setContent(R.id.btnTab);
tabSpec.setIndicator("My Tab 1");
tabHost.addTab(tabSpec);
btnAddTab.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
TabHost.TabSpec spec = tabHost.newTabSpec("Tab"+i);
spec.setContent(new TabHost.TabContentFactory() {
#Override
public View createTabContent(String tag) {
return new AnalogClock(MainActivity.this);
}
});
spec.setIndicator("Clock");
tabHost.addTab(spec);
}
});
I really need to access the images of a tab at runtime for scaling.
Therefore I made a custom tab layout with an imageview and a textview.
But if i want to add the custom tab to my tabhost I a "did you forget to call 'public void setup(localactivitymanager activitygroup)'" exception.
Thx in advance for any solutions ;D
Ps. I cannot use
spec = tabHost.newTabSpec("2").setIndicator(res.getString(R.string.tabname2),
res.getDrawable(R.drawable.tabimage2));
tabHost.addTab(spec, FragmentTwo.class, null);
because i need to scale the image before adding.
Here is my class:
public class MyTabActivity extends FragmentActivity {
private FragmentTabHost mTabHost;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.tabmanager_layout);
mTabHost = (FragmentTabHost)findViewById(android.R.id.tabhost);
mTabHost.setup(this, getSupportFragmentManager(), R.id.realtabcontent);
addCustomTab(getApplicationContext(),"Meldungen", getResources().getDrawable(R.drawable.messagewhite), NewsFragment.class, mTabHost);
addCustomTab(getApplicationContext(),"Meldungen", getResources().getDrawable(R.drawable.messagewhite), NewsFragment.class, mTabHost);
addCustomTab(getApplicationContext(),"Meldungen", getResources().getDrawable(R.drawable.messagewhite), NewsFragment.class, mTabHost);
addCustomTab(getApplicationContext(),"Meldungen", getResources().getDrawable(R.drawable.messagewhite), NewsFragment.class, mTabHost);
for(int i=0;i<mTabHost.getTabWidget().getChildCount();i++)
{
mTabHost.getTabWidget().getChildAt(i).setBackgroundColor(Color.parseColor("#3b6c8d")); //unselected
}
}
private void addCustomTab(Context context,String labelId, Drawable drawable, Class<?> c, FragmentTabHost fth ) {
View view = LayoutInflater.from(context).inflate(R.layout.tab_customtab, null);
ImageView image = (ImageView) view.findViewById(R.id.icon);
TextView text = (TextView) view.findViewById(R.id.tabtitle);
image.setImageDrawable(drawable);
text.setText(labelId);
TabHost.TabSpec spec = fth.newTabSpec(labelId);
Intent i = new Intent(this,c);
spec.setContent(i);
spec.setIndicator(view);
fth.addTab(spec);
}
You need to use FragmentTabHost's custom addTab() which will also take your Fragment class as parameter.
Replace
TabHost.TabSpec spec = fth.newTabSpec(labelId);
Intent i = new Intent(this,c);
spec.setContent(i);
spec.setIndicator(view);
with
TabHost.TabSpec spec = fth.newTabSpec(labelId);
spec.setIndicator(view);
fth.addTab(spec, c, null);
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
icon = (ImageView) findViewById(R.id.header);
Resources res = getResources();
// construct the tabhost
setContentView(R.layout.tab_layout);
setupTabHost();
// mTabHost.getTabWidget().setDividerDrawable(R.drawable.hotels);
setupTab(new TextView(this), "Hotels");
res.getDrawable(R.drawable.hote);
setupTab(new TextView(this), "MyAccount");
res.getDrawable(R.drawable.ma);
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE,
R.layout.tab_layout);
View title = getWindow().findViewById(R.id.tabsLayout);
}
#TargetApi(4)
private void setupTab(final View view, final String tag) {
View tabview = createTabView(mTabHost.getContext(), tag);
TabSpec set_Content = mTabHost.newTabSpec(tag).setIndicator(tabview)
.setContent(new TabContentFactory() {
public View createTabContent(String tag) {
return view;
}
});
switch (tag) {
case ("Hotels"): {
Intent setClass = new Intent(this, ListSample.class);
set_Content.setContent(setClass);
break;
}
case ("MyAccount"): {
/*
* Intent setClass = new Intent(this, AccountActivity.class);
* set_Content.setContent(setClass);
*/break;
}
}
mTabHost.addTab(set_Content);
}
private static View createTabView(final Context context, final String text) {
View view = LayoutInflater.from(context)
.inflate(R.layout.tabs_bg, null);
TextView tv = (TextView) view.findViewById(R.id.tabsText);
tv.setText(text);
return view;
}
}
I'm customizing the Tabs and trying to start an activity for each tab. I'm not able to find the error.
try the following code:
final TabHost tabHost = getTabHost();
TabHost.TabSpec ts = tabHost.newTabSpec("ID_1");
ts.setIndicator("1");
ts.setContent(Intent1);// Intent to start activity
tabHost.addTab(ts);
ts = tabHost.newTabSpec("ID_2");
ts.setIndicator("2");
ts.setContent(Intent2);
tabHost.addTab(ts);
ts = tabHost.newTabSpec("ID_3");
ts.setIndicator("3");
ts.setContent(Intent3);
tabHost.addTab(ts);
in my app after the SplashScreen i am calling a Tabactivity.
In tha tab activity, from the first tab i am switched over to a another activity called as Float, which is not related to the TabActivity. From this activity when a condition becomes True i want to show the third tab in the TabBar. How to open the third tab from the tab activity.
Following is the code of my Tabactivity class
public class MainTabBar extends TabActivity
{
TabHost tabHost;
Intent intent;
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.maintab);
addTab1(Display.class);
addTab2(History.class);
addTab3(Capture .class);
addTab4(AboutUs.class);
}
private void addTab1( Class<?> c)
{
TabHost tabHost = getTabHost();
Intent intent = new Intent(this, c);
TabHost.TabSpec spec = tabHost.newTabSpec("Tab1");
View tabIndicator = LayoutInflater.from(this).inflate(R.layout.hometab, getTabWidget(), false);
spec.setIndicator(tabIndicator);
spec.setContent(intent);
tabHost.addTab(spec);
}
private void addTab2( Class<?> c)
{
TabHost tabHost = getTabHost();
Intent intent = new Intent(this, c);
TabHost.TabSpec spec = tabHost.newTabSpec("Tab2");
View tabIndicator = LayoutInflater.from(this).inflate(R.layout.macstab, getTabWidget(), false);
spec.setIndicator(tabIndicator);
spec.setContent(intent);
tabHost.addTab(spec);
}
private void addTab3( Class<?> c)
{
TabHost tabHost = getTabHost();
Intent intent = new Intent(this, c);
TabHost.TabSpec spec = tabHost.newTabSpec("Tab3");
View tabIndicator = LayoutInflater.from(this).inflate(R.layout.abouttab, getTabWidget(), false);
spec.setIndicator(tabIndicator);
spec.setContent(intent);
tabHost.addTab(spec);
}
private void addTab4( Class<?> c)
{
TabHost tabHost = getTabHost();
Intent intent = new Intent(this, c);
TabHost.TabSpec spec = tabHost.newTabSpec("Tab4");
View tabIndicator = LayoutInflater.from(this).inflate(R.layout.contacttab, getTabWidget(), false);
spec.setIndicator(tabIndicator);
spec.setContent(intent);
tabHost.addTab(spec);
}
}
Is it to the above thing using a flag or any other easy way, pls suggest me friends, i am very new to android
You can use the tab index to show the third tab
tabHost.setCurrentTab(2);
Is it possible to update the TabWidget icons/indicators? If so, how, when you are creating TabContent through intents?
Edits below with answer thanks to #Bart
Generic code:
MainActivity:
public class TestActivity extends TabActivity {
public int i;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//TabHost mTabHost = (TabHost) findViewById(android.R.id.tabhost);
TabHost mTabHost = getTabHost();
mTabHost.addTab(mTabHost.newTabSpec("tab1").setContent(
new Intent(this, OneActivity.class)).setIndicator("One"));
mTabHost.addTab(mTabHost.newTabSpec("tab2").setContent(
new Intent(this, TwoActivity.class)).setIndicator("Two"));
changeTitle(0, 20);
}
public void changeTitle(int cnt, int i){
View v = getTabWidget().getChildAt(cnt);
TextView tv = (TextView) v.findViewById(android.R.id.title);
tv.setText("One ("+i+")");
}
}
OneActivity (ChildActivity):
public class OneActivity extends Activity {
TextView tv;
Button btn;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.one);
tv = (TextView) findViewById(R.id.tv);
btn = (Button) findViewById(R.id.btn);
btn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
int i = Integer.parseInt((String) tv.getText());
i++;
tv.setText(""+i);
TestActivity parent = OneActivity.this.getParent();
parent.changeTitle(0,i);
}
});
}
}
I'd like to show the number in the Tab's title
It is possible but it is a bit of tricky:
ViewGroup vg = (ViewGroup) getTabHost().getTabWidget().getChildAt(0);
TextView tv = (TextView) vg.getChildAt(1);
You should pay attention to indices while calling getChildAt(). The best way is always to debug and check.
Since 1.6 TabWidget has a method getChildTabViewAt thanks to which you could skip the first line and write:
ViewGroup vg = (ViewGroup) getTabHost().getTabWidget().getChildTabViewAt(0);
I attach also source code of Android SDK to show how TabWidget icons are built:
View tabIndicator = inflater.inflate(R.layout.tab_indicator,
mTabWidget, // tab widget is the parent
false); // no inflate params
final TextView tv = (TextView) tabIndicator.findViewById(R.id.title);
tv.setText(mLabel);
final ImageView iconView = (ImageView) tabIndicator.findViewById(R.id.icon);
iconView.setImageDrawable(mIcon);
As you can see, it contains a TextView and ImageView.
Try get the imageView like this
ImageView v = (ImageView)tabActivity.getTabHost().getTabWidget().getChildTabViewAt(i).findViewById(android.R.id.icon);
v.setImageDrawable(getResources().getDrawable(R.drawable.newIcon));
Given a arrays for titles and icons
for (int i = 0; i < numTabs; i++ ) {
TabSpec spec = host.newTabSpec(String.valueOf(i)); //sets tab index
Drawable icon = res.getDrawable(icons[i]); //sets the icon
// set tab text and icon
spec.setIndicator(titles[i], icon); //sets the title
host.addTab(spec);
}