Question

Thanks in advance.

This is my sample code. Whenever i try to run it and change the screen orientation both the edit text disappears and i have to restart the application.
please help me out

 public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    ed1=(EditText)findViewById(R.id.ed1);
    ed2=(EditText)findViewById(R.id.ed2);

    ed1.addTextChangedListener(new TextWatcher()                          
    {
        public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
        }

        public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
                int arg3) {
        }

        public void afterTextChanged(Editable arg0) {    
            ed2.setVisibility(View.INVISIBLE);
        }
    }); 

    ed2.addTextChangedListener(new TextWatcher()            
    {
        public void onTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {

        }    

        public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
                int arg3) {
        }

        public void afterTextChanged(Editable arg0) {   
            ed1.setVisibility(View.INVISIBLE);
        }
    });
}

This is my main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<TableLayout
    android:id="@+id/table"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:padding="25dip"
    android:stretchColumns="0,1" >

    <TableRow>

        <TextView
            android:id="@+id/text1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="20dip"
            android:text="Edit Text 1"
            android:textSize="15dip" />

        <EditText
            android:id="@+id/ed1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="5dip"
            android:layout_marginTop="20dip"
            android:maxLength="10"
            android:numeric="integer|decimal" />
    </TableRow>

    <TableRow>

        <TextView
            android:id="@+id/or_text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="5dip"
            android:text="OR"
            android:textSize="20dip" />
    </TableRow>

    <TableRow>

        <TextView
            android:id="@+id/text2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="20dip"
            android:text="Edit Text2"
            android:textSize="15dip" />

        <EditText
            android:id="@+id/ed2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="5dip"
            android:layout_marginTop="20dip"
            android:maxLength="10"
            android:numeric="integer|decimal" />
    </TableRow>
</TableLayout>

Answer 1

Every time you rotate your device your activity restarts, that is why you do not see your EditTexts.

Add this line of XML to your activity in Manifest file

android:configChanges="orientation|keyboardHidden"

Also check this out to know more about Runtime changes to your applications.