有两种解决方案：
1，使用 add 添加到Activity的Fragment中，
private FragmentTransaction transaction;
private FragmentManager fragmentManager;
fragmentManager = getSupportFragmentManager();
transaction = fragmentManager.beginTransaction();
if (myMainFragmentBtn == null) { myMainFragmentBtn = new MainFragmentBtn(); myMainFragmentBtn.setBtnFrag(petInstance.get()); transaction.add(R.id.fragment_main, myMainFragmentBtn);//fragment_main是Activity中的Fragment 的ID
} else {
transaction.show(myMainFragmentBtn);
}
transaction.commit();
使用 .hide隐藏，这样下次显示的时候 transaction.show(myMainFragmentBtn);就行
private void hideAllFragment(FragmentTransaction fragmentTransaction) { if (myMainFragmentRun != null) {//-1 fragmentTransaction.hide(myMainFragmentRun); } if (myFragmentAlert != null) {//-110 fragmentTransaction.hide(myFragmentAlert); } if (myFragmentGangAlert != null) {//-120 fragmentTransaction.hide(myFragmentGangAlert); }
}
2.使用 FragmentPagerAdapter 去管理Fragment ，这种情况就需要出现闪黑屏；但是我们可以通过动画效果来避免这种情况
// 设置ViewPager的切换动画，3.0以上版本有效 vpHome.setPageTransformer(false, new ViewPager.PageTransformer() { private static final float MIN_SCALE = 0.2f; @Override public void transformPage(View page, float position){ int pageWidth = page.getWidth(); //左侧不可见Pager if(position < -1) { page.setAlpha(0); page.setRotationY(0); } //左侧可见Pager else if(position <= 0) { page.setAlpha(1); page.setTranslationX(0); page.setScaleX(1); page.setScaleY(1); page.setRotationY(0); } //右侧可见Pager else if(position <= 1) { page.setAlpha(1 - position); page.setPivotX(page.getMeasuredWidth()/2); page.setPivotY(page.getMeasuredHeight()/2); page.setRotationY(position * 180); page.setTranslationX(pageWidth * -position); float scaleFactor = MIN_SCALE + (1 - MIN_SCALE) * (1 - Math.abs(position)); page.setScaleX(scaleFactor); page.setScaleY(scaleFactor); } //右侧不可见Pager else { page.setAlpha(0); page.setRotationY(180); } } }); }