package com.marshalchen.common.uimodule.swipeback; import android.app.Activity; import android.graphics.drawable.ColorDrawable; import android.view.LayoutInflater; import android.view.View; import com.marshalchen.common.uimodule.R; import java.lang.reflect.Method; /** * @author Yrom */ public class SwipeBackActivityHelper { private Activity mActivity; private SwipeBackLayout mSwipeBackLayout; public SwipeBackActivityHelper(Activity activity) { mActivity = activity; } @SuppressWarnings("deprecation") public void onActivityCreate() { mActivity.getWindow().setBackgroundDrawable(new ColorDrawable(0)); mActivity.getWindow().getDecorView().setBackgroundDrawable(null); mSwipeBackLayout = (SwipeBackLayout) LayoutInflater.from(mActivity).inflate( R.layout.swipeback_layout, null); mSwipeBackLayout.addSwipeListener(new SwipeBackLayout.SwipeListener() { @Override public void onScrollStateChange(int state, float scrollPercent) { if (state == SwipeBackLayout.STATE_IDLE && scrollPercent == 0) { convertActivityFromTranslucent(); } } @Override public void onEdgeTouch(int edgeFlag) { convertActivityToTranslucent(); } @Override public void onScrollOverThreshold() { } }); } public void onPostCreate() { mSwipeBackLayout.attachToActivity(mActivity); convertActivityFromTranslucent(); } public View findViewById(int id) { if (mSwipeBackLayout != null) { return mSwipeBackLayout.findViewById(id); } return null; } public SwipeBackLayout getSwipeBackLayout() { return mSwipeBackLayout; } /** * Convert a translucent themed Activity * {@link android.R.attr#windowIsTranslucent} to a fullscreen opaque * Activity. * <p> * Call this whenever the background of a translucent Activity has changed * to become opaque. Doing so will allow the {@link android.view.Surface} of * the Activity behind to be released. * <p> * This call has no effect on non-translucent activities or on activities * with the {@link android.R.attr#windowIsFloating} attribute. */ public void convertActivityFromTranslucent() { try { Method method = Activity.class.getDeclaredMethod("convertFromTranslucent", null); method.setAccessible(true); method.invoke(mActivity, null); } catch (Throwable t) { } } /** * Convert a translucent themed Activity * {@link android.R.attr#windowIsTranslucent} back from opaque to * translucent following a call to {@link #convertActivityFromTranslucent()} * . * <p> * Calling this allows the Activity behind this one to be seen again. Once * all such Activities have been redrawn * <p> * This call has no effect on non-translucent activities or on activities * with the {@link android.R.attr#windowIsFloating} attribute. */ public void convertActivityToTranslucent() { try { Class<?>[] classes = Activity.class.getDeclaredClasses(); Class<?> translucentConversionListenerClazz = null; for (Class clazz : classes) { if (clazz.getSimpleName().contains("TranslucentConversionListener")) { translucentConversionListenerClazz = clazz; } } Method method = Activity.class.getDeclaredMethod("convertToTranslucent", translucentConversionListenerClazz); method.setAccessible(true); method.invoke(mActivity, new Object[] { null }); } catch (Throwable t) { } } }