Disable auto focus on edit text

If you want clear the default focus on the edit text then use the following 2 attributes

android:focusable="false"
 android:focusableInTouchMode="true"

inside the parent Linear layout.

for example:

<LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:focusable="false"
            android:focusableInTouchMode="true"
            android:orientation="vertical">


     <EditText
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:hint="email id"
         android:inputType="textEmailAddress"
         android:maxLines="1"
    />

</LinearLayout>

If you want to hide the keyboard on activity creation use these attributes inside manifest file activity tag for example:

 <activity
     android:configChanges="screenSize|orientation|keyboardHidden"
     android:screenOrientation="portrait"
     android:name=".activities.LoginActivity"
     android:windowSoftInputMode="stateHidden|adjustResize"/>

If you want to hide the keyboard on button click or on some event occur use the following code

 public void onClick(View v) {
                try {
                    //InputMethodManager is used to hide the virtual keyboard from the user after finishing the user input
                    InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                    if (imm.isAcceptingText()) {
                        imm.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 0);
                    }
                } catch (NullPointerException e) {
                    Log.e("Exception", e.getMessage() + ">>");
                }
                    }
                } catch (NullPointerException e) {
                    Log.e("Exception", e.getMessage() + ">>");
                }

If you want to take off the focus from edit text fields after leaving the activity

@Override
    protected void onResume() {
        super.onResume();
        mEmail.clearFocus();
        mPassword.clearFocus();
}

And finally If you want to clear the data in the edit text fields on submitting the form use

 @Override
    protected void onResume() {
        super.onResume();
        mEmail.getText().clear();
        mPassword.getText().clear();
    }

Add the android:focusable="true" and android:focusableInTouchMode="true" elements in the parent layout of EditText as follow;

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/linearLayout7" android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:focusable="true" android:focusableInTouchMode="true">

I think, it should help you.

See also;
    Android Developers official guide on handling touch and input