如何在android中重用布局，但同时使用多个ID？

Question

http://developer.android.com/training/improving-layouts/reusing-layouts.html

In this website it introduce

<include layout="@layout/titlebar"/>

to reuse layout, so I may code like this the problem is ,

<include layout="@layout/titlebar"
 android:id="@+id/bar_1"/>

<include layout="@layout/titlebar"
 android:id="@+id/bar_2"/>

if the titlebar is a linearlayout, and I would like to get the textview inside titlebar , how can I differenate between bar 1 and bar 2? Thanks

Answer 1

Try:

// Get root View id from that include link
View yourLayout1 = findViewById(R.id.bar1); 
View yourLayout2 = findViewById(R.id.bar2); 

// Get text view contained inside the include file
TextView yourTextView1 = (TextView)(yourLayout1.findViewById( R.id.yourInnerTextview )); 
TextView yourTextView2 = (TextView)(yourLayout2.findViewById( R.id.yourInnerTextview ));

PS: I haven't tested it but logically sounds good. So let me know if it works.

Answer 2

/**
 * Look for a child view with the given id.  If this view has the given
 * id, return this view.
 *
 * @param id The id to search for.
 * @return The view that has the given id in the hierarchy or null
 */
public final View findViewById(int id) {
    if (id < 0) {
        return null;
    }
    return findViewTraversal(id);
}

View Object also have findViewById function. And it only find the child . So you can firstly find the bar_1 or bar_2 , and then use the bar_1 Object or bar_2 Object's findViewById function to get the child view you want.