LoginActivity.java

/* button and background animation gist */

package roman.com.cryptobox.activities;

import android.animation.Animator;
import android.animation.ArgbEvaluator;
import android.animation.ValueAnimator;
import android.content.Intent;
import android.content.res.ColorStateList;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.support.design.widget.TextInputLayout;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ScrollView;

import roman.com.cryptobox.R;
import roman.com.cryptobox.contracts.LoginContract;
import roman.com.cryptobox.presenters.LoginPresenter;


/**
 * A login screen that offers login via email/password.
 */
public class LoginActivity extends AppCompatActivity implements LoginContract.View {


    //the presenter(logic module)
    private LoginContract.Presenter mPresenter;
    // UI references.
    private EditText mPasswordEditText;
    private TextInputLayout mTextInputLayout;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);
        mPresenter = new LoginPresenter(this);

        //get the views
        mPasswordEditText = (EditText) findViewById(R.id.edittext_password_login);
        mTextInputLayout = (TextInputLayout) findViewById(R.id.textinputlayout_password);

//        some stuff for avshi
//        ApiTester tester = new ApiTester();
//        tester.runScripts();
    }


    /**
     * a listener method for the login button click event
     *
     * @param view the login button
     */
    public void onClickLoginButton(View view) {
        //call the verification logic on the presenter
        mPresenter.loginButtonClicked(mPasswordEditText.getText().toString());
    }

    /**
     * go to NotesActivity - the ones with the list view of all notes
     */
    @Override
    public void showNotesActivity() {
        //show the user the password is correct
        // will call goToNotesActivity when finished
        showPasswordGood();
    }

    /**
     * Go to the notes activity
     */
    private void goToNotesActivity(){
        //launch the permissions activity
        Intent intent = new Intent(this, NotesActivity.class);
        startActivity(intent);
        finish();
    }

    /**
     * show user an error demonstration that the password was incorrect
     */
    @Override
    public void showPasswordBad() {
        mTextInputLayout.setError(getString(R.string.error_incorrect_password));
        mPasswordEditText.requestFocus();

    }

    /**
     * provide a nice animation to demonstrate to the user that the password was good
     */
    private void showPasswordGood() {


        final Button loginButton = (Button) findViewById(R.id.button_login);
        final ScrollView scrollingView = (ScrollView) findViewById(R.id.login_scrollview_layout);

        loginButton.setBackgroundTintList(getResources().getColorStateList(R.color.colorAccent));


//        button animation

        ValueAnimator animator1 = ValueAnimator.ofObject(new ArgbEvaluator(), getResources().getColor(R.color.cryptobox_blue), getResources().getColor(R.color.cryptobox_positive_green_1));
        animator1.setDuration(500);
        animator1.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                Integer color = (Integer) animation.getAnimatedValue();
                if (color != null) {
                    loginButton.setBackgroundTintList(ColorStateList.valueOf(color));
                }
            }
        });

//        background animation


        ValueAnimator animator2 = ValueAnimator.ofObject(new ArgbEvaluator(), getResources().getColor(R.color.white), getResources().getColor(R.color.cryptobox_positive_green_2));
        animator2.setDuration(500);
        animator2.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                Integer color = (Integer) animation.getAnimatedValue();
                if (color != null) {
                    scrollingView.setBackground(new ColorDrawable(color));
                }
            }
        });

        animator1.start();
        animator2.start();

        loginButton.setText(getString(R.string.acitivity_login_button_text_state_2));

        animator1.addListener(new Animator.AnimatorListener() {
            @Override
            public void onAnimationStart(Animator animation) {

            }

            @Override
            public void onAnimationEnd(Animator animation) {
                goToNotesActivity();
            }

            @Override
            public void onAnimationCancel(Animator animation) {

            }

            @Override
            public void onAnimationRepeat(Animator animation) {

            }
        });
    }
}