KB-20071208-030

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Make layout in which TimePicker nested within a LinearLayout, that is in turn nested within another LinearLayout.

code example (from Rick Genter post): 

<?xml version="1.0" encoding="UTF-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
               android:orientation="vertical"
               android:layout_width="fill_parent"
               android:layout_height="fill_parent">
     <!-- the first item is the time control -->
     <LinearLayout android:orientation="horizontal"
                   android:layout_width="fill_parent"
                   android:layout_height="wrap_content">
         <TextView android:layout_width="wrap_content"
                   android:layout_height="wrap_content"
                   android:text="@string/MealTime_Label"/>

         <TimePicker id="@+id/MealTime"
                     android:layout_width="fill_parent"
                     android:layout_height="wrap_content"
                     android:showSetButton="false"/>

     </LinearLayout>

     <!-- other stuff (see original post) -->

</LinearLayout>

Unexpected result: java.lang.RuntimeException: Binary XML file line #125: You must supply a layout_width attribute.

Thus Activity is not started. Replacing LinearLayout with TableLayout makes Activity start, but the ids of the nested views are not accessible.

code example (from Rick Genter post):

main.xml: 

<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical"
              android:layout_width="fill_parent"
              android:layout_height="fill_parent">
     <TableRow>
         <TimePicker id="@+id/Time"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"/>
     </TableRow>
     <TableRow id="@+id/ButtonRow">
         <Button id="@+id/Button1"
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:text="A"/>
         <!-- other stuff skipped, see original post -->
     </TableRow>
</TableLayout>

Test3.java: 

package test.test3;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TableRow;

public class Test3 extends Activity {
     /** Called when the activity is first created. */
     @Override
     public void onCreate(Bundle icicle) {
         super.onCreate(icicle);
         setContentView(R.layout.main);

         Button button1 = (Button) findViewById(R.id.Button1);
         if (button1 == null) {
             Log.e("Test3", "Couldn't find Button1 view by id");
             TableRow row = (TableRow) findViewById(R.id.ButtonRow);
             button1 = (Button) row.getChildAt(0);
         }
         button1.setOnClickListener(new Button.OnClickListener() {
             public void onClick(View v) {
                 finish();
             }
         });

         // skipped other code, see original post
     }
}

Unexpected result: findViewById() returns null. "Couldn't find Button1 view by id" is logged.

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