bluzwong / swipeback

Activity swipe back

Swipe Back

A library to add swipe back feature for activity.

• Do not need inherit BaseActivity
• Do not need theme
• Support Parallax, Shadow background, Edge to back

Download Demo 中文用户请点此处

Usage

0. Use helper method to start the activity you want swipe back. This method have some overloads to make parallax, shadow background or edge to back

SwipeBackActivityHelper.startSwipeActivity(this, intent, true, true);
// or use a builder to change some configs
SwipeBackActivityHelper.activityBuilder(MainActivity.this)
                        .intent(intent)
                        .needParallax(true)
                        .needBackgroundShadow(true)
                     // .fitSystemWindow(true) // status bar height
                     // .prepareView(swipeRefreshLayout)
                     // see http://stackoverflow.com/questions/29356607/android-swiperefreshlayout-cause-recyclerview-not-update-when-take-screenshot
                        .startActivity();

1. Setup the activity you want swipe back.

SwipeBackActivityHelper helper = new SwipeBackActivityHelper();
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    // ...
    helper.setEdgeMode(true)
            .setParallaxMode(true)
            .setParallaxRatio(3)
            .setNeedBackgroundShadow(true)
            .init(this);
    // ...
}

2. More better, override onBackPressed() to show swipe back animation

@Override
public void onBackPressed() {
    helper.finish();
}

3. That's all.But if this activity contains another swipe view, it may cause conflict. Example. Handle ViewPager with swipe back :

viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
    }

    @Override
    public void onPageSelected(int position) {
        if (position != 0) {
            /// if the current view page is not the first, make 'viewPager' receive touch event.
            helper.disableSwipeBack();
            
            /// or enable edge mode
            helper.setEdgeMode(true);
        } else {
            /// the current page return to the first one, make 'swipe back' receive touch event.
            helper.enableSwipeBack();
            
            /// or disable edge mode
            helper.setEdgeMode(false);
        }
    }

    @Override
    public void onPageScrollStateChanged(int state) {
    }
});

Dependence

Gradle:

compile 'com.github.bluzwong:swipeback:0.2.0@aar'