samples/HelloActivity/src/com/example/android/helloactivity/HelloActivity.java

/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.android.helloactivity;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.WindowManager;


/**
 * A minimal "Hello, World!" application.
 */
public class HelloActivity extends Activity {
    /**
     * Called with the activity is first created.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // Set the layout for this activity.  You can find it
        // in res/layout/hello_activity.xml
        View view = getLayoutInflater().inflate(R.layout.hello_activity, null);
        setContentView(view);

        WindowManager.LayoutParams params = getWindow().getAttributes();
        params.systemUiVisibility = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
        getWindow().setAttributes(params);
        view.setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener() {
            @Override public void onSystemUiVisibilityChange(int visibility) {
                WindowManager.LayoutParams params = getWindow().getAttributes();
                params.systemUiVisibility = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION;
                getWindow().setAttributes(params);
            }
        });
    }
}