选项卡活动中的自定义标题栏上的findViewById

Question

I have a custom title bar set on my TabActivity. The custom title bar contains a TextView and an ImageView in it. The tabHost has multiple tabs.

What I want to do is to access the ImageView resource in the tabs.

I am accessing the TextView from custom title bar in the main Tab activity (that extends TabActivity) and it is working fine. Following is the code which is working fine in main activity:

requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.myactivity);
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.mycustomtitle);
TextView tv = (TextView) findViewById(R.id.viewTitleId);

Now I want to access the ImageView in my tabs (which are added in tabHost). If I set following code in tab:

requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);

It gives following error:

You cannot combine custom titles with other title features

And if i directly set following in the tab code:

getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.mycustomtitle);
ImageView image = (ImageView) findViewById(R.id.imageTitleId);

The image remains null.

mycustomtitle.xml has following two elements:

<TextView 
     android:layout_width="0dp"
     android:layout_height="wrap_content" 
     android:layout_weight="0.80"
     android:id="@+id/viewTitleId"
     android:textColor="@color/titleBarTextColor"
     android:gravity="center_vertical"
     android:text="@string/viewText"
     android:textSize="18px"
     android:paddingLeft="45px"
     />

<ImageView 
    android:layout_height="wrap_content" 
    android:layout_width="0dp" 
            android:layout_weight="0.20"
    android:src="@drawable/btn_save" 
    android:id="@+id/imageTitleId"
    >
</ImageView>

Please give me some idea how can I access the Custom title's ImageView in the tabs ?

Answer 1

You can access the TextView and ImageView by declaring them public static in the TabActivity . Then, in the Sub-Activity you obviously access the public static TextView and ImageView like,

Main_Tab_Activity.textView.setText("my_text_view");

Answer 2

If you put Custom Title bar only in Main TabActivity that Title bar will appears in all of your Sub-TabActivity.

For Example if you gave Custom title Bar in Main TabActivity :

requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.main_layout);
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE,R.layout.header_layout);
TextView tv = (TextView) findViewById(R.id.viewTitleId);
ImageView image = (ImageView)findViewById(R.id.imageTitleId);

there is no need to give in all you Sub-tab Activity.

In all sub-Tab Activity you just set setContentView(R.layout.sub_layout);

Answer 3

use

getParent().getWindow().findViewById(id)

insted id findViewById(id); for access any view of parent.