@Override
    protected void onCreate (Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ImageView imageView1 = (ImageView) findViewById( R.id.imageView1 );
        imageView1.setOnClickListener( this );

        ImageView imageView2 = (ImageView) findViewById( R.id.imageView2 );
        imageView2.setOnClickListener( this );

        ImageView imageView3 = (ImageView) findViewById( R.id.imageView3 );
        imageView3.setOnClickListener( this );

        ImageView imageView4 = (ImageView) findViewById( R.id.imageView4 );
        imageView4.setOnClickListener( this );

    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {

            case R.id.imageView1:
                openActivity1();
                Intent intent = new Intent( this, Activity1.class );
                startActivity( intent );

                break;

            case R.id.imageView2:
                openActivity2();
                Intent intent1 = new Intent( this, Activity2.class );
                startActivity( intent1 );

                break;

            case R.id.imageView3:
                openActivity3();
                Intent intent2 = new Intent( this, Activity3.class );
                startActivity( intent2 );

                break;

            case R.id.imageView4:

                openActivity4();
                Intent intent3 = new Intent( this, Activity4.class );
                startActivity( intent3 );

                break;

            default:

                openActivity1();

        }

    }

private void openActivity1() {
}
private void openActivity2() {
}
private void openActivity3() {
}
private void openActivity4() {
} }

private static final String TAG = LoginWithAmazonActivity.class.getName();

    private TextView mProfileText;
    private Button mLogoutButton;
    private ProgressBar mLogInProgress;
    private RequestContext requestContext;
    private boolean mIsLoggedIn;
    private View mLoginButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        requestContext = RequestContext.create(this);



        requestContext.registerListener(new AuthorizeListener() {

            @Override
            public void onSuccess(AuthorizeResult authorizeResult) {
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        // At this point we know the authorization completed, so remove the ability to return to the app to sign-in again
                        setLoggingInState(true);
                    }
                });
                fetchUserProfile();
            }


            @Override
            public void onError(AuthError authError) {
                Log.e(TAG, "AuthError during authorization", authError);
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        showAuthToast("Error during authorization.  Please try again.");
                        resetProfileView();
                        setLoggingInState(false);
                    }
                });
            }


            @Override
            public void onCancel(AuthCancellation authCancellation) {
                Log.e(TAG, "User cancelled authorization");
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        showAuthToast("Authorization cancelled");
                        resetProfileView();
                    }
                });
            }
        });


        setContentView(R.layout.activity_main);
        initializeUI();

    }


    @Override
    protected void onResume() {
        super.onResume();
        requestContext.onResume();
    }

    @Override
    protected void onStart() {
        super.onStart();
        Scope[] scopes = {ProfileScope.profile(), ProfileScope.postalCode()};
        AuthorizationManager.getToken(this, scopes, new Listener<AuthorizeResult, AuthError>() {
            @Override
            public void onSuccess(AuthorizeResult result) {
                if (result.getAccessToken() != null) {
                    /* The user is signed in */
                    fetchUserProfile();
                } else {

                }
            }

            @Override
            public void onError(AuthError ae) {
                /* The user is not signed in */
            }
        });
    }


    private void fetchUserProfile() {
        User.fetch(this, new Listener<User, AuthError>() {


            @Override
            public void onSuccess(User user) {
                final String name = user.getUserName();
                final String email = user.getUserEmail();
                final String account = user.getUserId();
                final String zipCode = user.getUserPostalCode();

                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        updateProfileData(name, email, account, zipCode);
                    }
                });
            }


            @Override
            public void onError(AuthError ae) {
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        setLoggedOutState();
                        String errorMessage = "Error retrieving profile information.nPlease log in again";
                        Toast errorToast = Toast.makeText(getApplicationContext(), errorMessage,

private void updateProfileData(String name, String email, String account, String zipCode) {
        StringBuilder profileBuilder = new StringBuilder();
        profileBuilder.append(String.format("Welcome, %s!n", name));
        profileBuilder.append(String.format("Your email is %sn", email));
        profileBuilder.append(String.format("Your zipCode is %sn", zipCode));
        final String profile = profileBuilder.toString();
        Log.d(TAG, "Profile Response: " + profile);
        runOnUiThread(new Runnable() {
            @Override
            public void run() {
                updateProfileView(profile);
                setLoggedInState();
            }
        });
    }


    private void initializeUI() {

        mLoginButton = findViewById(R.id.login_with_amazon);
        mLoginButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                AuthorizationManager.authorize(
                        new AuthorizeRequest.Builder(requestContext)
                                .addScopes(ProfileScope.profile(), ProfileScope.postalCode())
                                .build()
                );
            }
        });

        // Find the button with the logout ID and set up a click handler
        View logoutButton = findViewById(R.id.logout);
        logoutButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                AuthorizationManager.signOut(getApplicationContext(), new

@Override
                    public void onError(AuthError authError) {
                        Log.e(TAG, "Error clearing authorization state.", authError);
                    }
                });
            }
        });

        String logoutText = getString(R.string.logout);
        mProfileText = (TextView) findViewById(R.id.profile_info);
        mLogoutButton = (Button) logoutButton;
        mLogoutButton.setText(logoutText);
        mLogInProgress = (ProgressBar) findViewById(R.id.log_in_progress);
    }


    private void updateProfileView(String profileInfo) {
        Log.d(TAG, "Updating profile view");
        mProfileText.setText(profileInfo);
    }


    private void resetProfileView() {
        setLoggingInState(false);
        mProfileText.setText(getString(R.string.default_message));
    }


    private void setLoggedInState() {
        mLoginButton.setVisibility(Button.GONE);
        setLoggedInButtonsVisibility(Button.VISIBLE);
        mIsLoggedIn = true;
        setLoggingInState(false);
    }


    private void setLoggedOutState() {
        mLoginButton.setVisibility(Button.VISIBLE);
        setLoggedInButtonsVisibility(Button.GONE);
        mIsLoggedIn = false;
        resetProfileView();
    }


    private void setLoggedInButtonsVisibility(int visibility) {
        mLogoutButton.setVisibility(visibility);
    }

    private void setLoggingInState(final boolean loggingIn) {
        if (loggingIn) {
            mLoginButton.setVisibility(Button.GONE);
            setLoggedInButtonsVisibility(Button.GONE);
            mLogInProgress.setVisibility(ProgressBar.VISIBLE);
            mProfileText.setVisibility(TextView.GONE);
        } else {
            if (mIsLoggedIn) {
                setLoggedInButtonsVisibility(Button.VISIBLE);
            } else {
                mLoginButton.setVisibility(Button.VISIBLE);
            }
            mLogInProgress.setVisibility(ProgressBar.GONE);
            mProfileText.setVisibility(TextView.VISIBLE);
        }
    }

    private void showAuthToast(String authToastMessage) {
        Toast authToast = Toast.makeText(getApplicationContext(), authToastMessage, Toast.LENGTH_LONG);
        authToast.setGravity(Gravity.CENTER, 0, 0);
        authToast.show();
    }
}

<ImageView
        android:id="@+id/imageView1"
        android:layout_width="150dp"
        android:layout_height="150dp"
        android:src="@drawable/aggressive_momemnts"
        android:clickable="true"
        android:focusable="true"

        android:contentDescription="@string/todo" />

    <ImageView
        android:id="@+id/imageView2"
        android:layout_width="150dp"
        android:layout_height="150dp"
        android:layout_marginStart="30dp"
        android:clickable="true"
        android:focusable="true"
        android:visibility="gone"
        android:src="@drawable/best_moments"
        android:layout_marginLeft="30dp"
        android:contentDescription="@string/todo" />

    <ImageView
        android:id="@+id/imageView3"
        android:layout_width="150dp"
        android:layout_height="150dp"
        android:layout_marginStart="30dp"
        android:layout_marginEnd="99dp"
        android:clickable="true"
        android:focusable="true"
        android:src="@drawable/best_player"
        android:layout_marginLeft="30dp"
        android:layout_marginRight="99dp"
        android:contentDescription="@string/todo" />

    <ImageView
        android:id="@+id/imageView4"
        android:layout_width="150dp"
        android:layout_height="150dp"
        android:layout_marginStart="30dp"
        android:clickable="true"
        android:focusable="true"
        android:src="@drawable/coach"
        android:layout_marginLeft="30dp"
        android:contentDescription="@string/todo" />


    <FrameLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/fragment"/>

    <ProgressBar
        android:id="@+id/log_in_progress"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"

        style="@android:style/Widget.ProgressBar.Inverse"/>





</LinearLayout>
<TextView
    android:id="@+id/profile_info"
    android:layout_width="310dp"
    android:layout_height="wrap_content"
    android:text="@string/default_message"
    android:textSize="15sp"
    android:gravity="center"
    android:layout_gravity="center"/>

<ImageButton
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_centerHorizontal="true"
    android:layout_marginBottom="10dp"
    android:id="@+id/login_with_amazon"
    android:src="@color/login_button_image_state"
    android:background="@android:color/transparent"
    android:padding="0dp"
    android:contentDescription="@string/login_button_content_description"

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_alignParentRight="true"
    android:layout_marginTop="10dp"
    android:layout_marginRight="10dp"
    android:id="@+id/logout"
    android:text="@string/logout"
    android:visibility="gone"
    android:clickable="true"
    android:textColor="@color/logout_text_color_state"
    android:paddingBottom="10dp"
    android:layout_alignParentEnd="true"
    android:layout_marginEnd="10dp" />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_alignParentRight="true"
    android:layout_marginTop="10dp"
    android:layout_marginRight="10dp"
    android:id="@+id/return_to_app"
    android:text="@string/return_to_app"
    android:visibility="gone"
    android:clickable="true"
    android:textColor="@color/logout_text_color_state"
    android:paddingBottom="10dp"
    android:layout_alignParentEnd="true"
    android:layout_marginEnd="10dp" /> </RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".Activity1">

<VideoView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/v1"
    />
 </RelativeLayout>

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_1);

    VideoView v1 = (VideoView) findViewById( R.id.v1 );

    v1.setVideoURI( Uri.parse( "https//.mp4" ) );
    v1.start();
    v1.requestFocus();
    v1.setKeepScreenOn( true );
} }