dynamically add remove control form linearlayout

Question

I have 3 layouts, I need when click on button access certain layout and ad remove controls from and in it any idea how to achieve that , this is the code I use

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical" >

    <LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0.20"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/backbutton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Back" />

        <Button
            android:id="@+id/backbutton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="next" />
    </LinearLayout>
    <!-- the two columns part -->

    <LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_weight="0.80"
        android:orientation="horizontal" >

        <LinearLayout
            xmlns:android="http://schemas.android.com/apk/res/android"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_weight="0.80" >

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="First Name" />
        </LinearLayout>

        <LinearLayout
            xmlns:android="http://schemas.android.com/apk/res/android"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:layout_weight="0.20" >

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="second Name" />
        </LinearLayout>
    </LinearLayout>

</LinearLayout>

Answer 1

Remove view from parent on Android:

View myView = findViewById(R.id.my_view);
ViewGroup parent = (ViewGroup) myView.getParent();
parent.removeView(myView);

Android remove all child views:

LinearLayout formLayout = (LinearLayout)findViewById(R.id.formLayout);
formLayout.removeAllViews();

Add view to parent on Android:

Button myButton = new Button(getApplicationContext());
myButton.setLayoutParameters(new LinearLayout.LayoutParams(
                                     LinearLayout.LayoutParams.FILL_PARENT,
                                     LinearLayout.LayoutParams.FILL_PARENT));

myLayout.addView(myButton);

you can use:

LinearLayout.LayoutParams.FILL_PARENT

or

LinearLayout.LayoutParams.WRAP_CONTENT

Answer 2

Add andoird:id="@+id/linerlayout_1" after that you can access this view easy inside the code with the findviewbyid() method.

For examlpe: place this inside the button's onclicklistener method.

LinearLayout ll = (LinearLayout) findViewById(R.id.linerlayout);
ll.setVisibility(View.GONE); // this row will hide the entire linerlayout
ll.addView(someView); //this row will add the specified View f.e.: TextView
ll.removeView(otherView); // this row will remove the view

And you can manage th view visibility by xml attribute android:visibility too.