package com.miz.introactivity;
import android.animation.ArgbEvaluator;
import android.graphics.PorterDuff;
import android.os.Bundle;
import android.support.v4.content.ContextCompat;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
/**
* Base activity that apps should extend
* to make use of the intro screen.
*/
public abstract class IntroActivity extends AppCompatActivity {
private final ArgbEvaluator mArgbEvaluator = new ArgbEvaluator();
private ViewPager mViewPager;
private Button mSkipButton;
private NextDoneButton mNextButton;
private IntroScreenPagerAdapter mPagerAdapter;
private LinearLayout mProgressLayout;
private boolean mShowSkipButton, mShowNextButton;
private int mProgressCircleColor;
@Override
protected final void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTheme(R.style.IntroActivity_Theme);
// Set the content view
setContentView(R.layout.intro);
// Set up the progress LinearLayout
mProgressLayout = (LinearLayout) findViewById(R.id.progress_layout);
// Set up the back button
mSkipButton = (Button) findViewById(R.id.skip_button);
mSkipButton.setOnClickListener(mOnSkipClickListener);
// Set up the next button
mNextButton = (NextDoneButton) findViewById(R.id.next_button);
mNextButton.setOnClickListener(mOnNextClickListener);
// Set up the ViewPager
mViewPager = (ViewPager) findViewById(R.id.view_pager);
// Set up the PagerAdapter
mPagerAdapter = new IntroScreenPagerAdapter(getSupportFragmentManager());
// Add the OnPageChangeListener
mViewPager.addOnPageChangeListener(mOnPageChangeListener);
// Set a custom animation PageTransformer
mViewPager.setPageTransformer(false, new CustomAnimationPageTransformer());
// Call the initialize method to add intro screens
// and set up the selected styles
initialize();
// Set up the progress layout with circles
setupProgressLayout();
// Set the ViewPager adapter
mViewPager.setAdapter(mPagerAdapter);
// Required in order to get a callback in onPageSelected
mViewPager.setCurrentItem(0);
}
@Override
public void onDestroy() {
super.onDestroy();
// Remove the OnPageChangeListener when the Activity is destroyed
mViewPager.removeOnPageChangeListener(mOnPageChangeListener);
}
private void setupProgressLayout() {
int circleSize = Utils.convertDpToPixel(this, 8);
int circleMargin = Utils.convertDpToPixel(this, 4);
for (int i = 0; i < mPagerAdapter.getCount(); i++) {
// Create a new ImageView with a circle background
ImageView circle = new ImageView(this);
circle.setBackgroundResource(R.drawable.progress_circle);
// Set up LayoutParams for the circle
LinearLayout.LayoutParams pm = new LinearLayout.LayoutParams(circleSize, circleSize);
pm.setMargins(circleMargin, 0, circleMargin, 0);
circle.setLayoutParams(pm);
// Add the circle to the progress layout
mProgressLayout.addView(circle);
}
// Select the first item
setProgressSelection(0);
}
/**
* OnClickListener for the "Skip" button.
*/
private final View.OnClickListener mOnSkipClickListener = new View.OnClickListener() {
@Override
public void onClick(View v) {
// "Skip" button pressed callback
onSkipPressed();
}
};
/**
* OnClickListener for the "Next" / "Done" button.
*/
private final View.OnClickListener mOnNextClickListener = new View.OnClickListener() {
@Override
public void onClick(View v) {
int currentItem = mViewPager.getCurrentItem();
// Navigate to the next page in the ViewPager if we're not at the end already
if (currentItem < mPagerAdapter.getCount() - 1) {
// Navigate to the next page
mViewPager.setCurrentItem(currentItem + 1, true);
// "Next" button pressed callback
onNextPressed(mViewPager.getCurrentItem());
} else {
// "Done" button pressed callback
onDonePressed();
}
}
};
private ViewPager.OnPageChangeListener mOnPageChangeListener = new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
if (position < mPagerAdapter.getCount() - 1) {
// Set the background color of the ViewPager based on the scroll offset
// in respect to the background color of the pages being scrolled
mViewPager.setBackgroundColor((Integer) mArgbEvaluator.evaluate(positionOffset,
mPagerAdapter.getBackgroundColorForPage(position),
mPagerAdapter.getBackgroundColorForPage(position + 1)));
}
}
@Override
public void onPageSelected(int position) {
// Check if the current ViewPager position is at the end
if (position == mPagerAdapter.getCount() - 1) {
// Show the "Done" button
mNextButton.showDoneButton(true);
// Hide the "Skip" button
mSkipButton.setVisibility(View.INVISIBLE);
} else {
// Check if the "Done" button is shown - if so, we should change to
// "Next" as we're no longer on the last page in the ViewPager
if (mNextButton.getButtonStyle() == NextDoneButton.STYLE_DONE) {
mNextButton.showNextButton(true);
}
// Check if the "Skip" button isn't visible when it should be
if (mShowSkipButton && mSkipButton.getVisibility() != View.VISIBLE) {
mSkipButton.setVisibility(View.VISIBLE);
}
}
setProgressSelection(position);
}
@Override
public void onPageScrollStateChanged(int state) {}
};
private void setProgressSelection(int position) {
for (int i = 0; i < mProgressLayout.getChildCount(); i++) {
mProgressLayout.getChildAt(i).setBackgroundResource(i == position ?
R.drawable.progress_circle_selected :
R.drawable.progress_circle);
if (mProgressCircleColor == 0) {
mProgressCircleColor = ContextCompat.getColor(this, R.color.progress_circle_color);
}
mProgressLayout.getChildAt(i).getBackground()
.setColorFilter(mProgressCircleColor, PorterDuff.Mode.SRC_IN);
}
}
/**
* Set the color of the progress circles at the bottom
* of the intro screen.
* @param color Progress circle color to set.
*/
protected void setProgressCircleColor(int color) {
mProgressCircleColor = color;
}
/**
* Use this method to initialize your intro screens
* and set up various styling options.
*/
protected abstract void initialize();
/**
* Add an intro screen (Fragment) to the ViewPager.
* @param introScreen Fragment to add.
*/
protected void addIntroScreen(BaseIntroFragment introScreen, int backgroundColor) {
mPagerAdapter.addFragment(introScreen, backgroundColor);
}
/**
* Determine if the "Next" button should be shown. Default is true.
* @param showNextButton True if visible, false otherwise.
*/
protected void setShowNextButton(boolean showNextButton) {
mShowNextButton = showNextButton;
mNextButton.setVisibility(mShowNextButton ? View.VISIBLE : View.GONE);
}
/**
* Determine if the "Skip" button should be shown. Default is true.
* @param showSkipButton True if visible, false otherwise.
*/
protected void setShowSkipButton(boolean showSkipButton) {
mShowSkipButton = showSkipButton;
mSkipButton.setVisibility(mShowSkipButton ? View.VISIBLE : View.GONE);
}
/**
* Set the text color of the Skip button. Default color is white (#F0F0F0).
* @param color Text color to set.
*/
protected void setSkipButtonTextColor(int color) {
mSkipButton.setTextColor(color);
}
/**
* Set the background color of the Next / Done button. The selected color
* will be 25 percent opaque. Default color is white (#FFFFFF).
* @param color Background color for the Next / Done button.
*/
protected void setNextButtonBackgroundColor(int color) {
mNextButton.getBackground().setColorFilter(color, PorterDuff.Mode.SRC_IN);
}
/**
* Set the color of the arrow / done icon for the Next / Done button.
* Default color is white (#F0F0F0).
* @param color
*/
protected void setNextButtonIconColor(int color) {
mNextButton.setColor(color);
}
/**
* Callback when the "Skip" button is pressed.
*/
protected abstract void onSkipPressed();
/**
* Callback when the "Next" button is pressed.
* @param pagePosition Zero-based index of the current page position.
*/
protected abstract void onNextPressed(int pagePosition);
/**
* Callback when the "Done" button is pressed.
*/
protected abstract void onDonePressed();
}
