How to convert TextView to EditText in android?

Best to use a ViewSwitcher

...
    <ViewSwitcher
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/my_switcher"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >

        <TextView
            android:id="@+id/clickable_text_view"
            android:clickable="true"
            android:onClick="TextViewClicked"
            android:text="@string/some_value" />

        <EditText
            android:id="@+id/hidden_edit_view"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="@string/some_value" />
    </ViewSwitcher>
...

Then you can switch the views by

public void TextViewClicked() {
    ViewSwitcher switcher = (ViewSwitcher) findViewById(R.id.my_switcher);
    switcher.showNext(); //or switcher.showPrevious();
    TextView myTV = (TextView) switcher.findViewById(R.id.clickable_text_view);
    myTV.setText("value");
}