这里是解决方案,它只允许您将片段添加到堆栈中一次,否则它将从堆栈中弹出相同的片段。
public static void openFragment(Activity activity, Fragment fragment) {
String fragmentTag = fragment.getClass().getName();
FragmentManager fragmentManager= ((ActionBarActivity) activity)
.getSupportFragmentManager();
boolean fragmentPopped = fragmentManager
.popBackStackImmediate(fragmentTag , 0);
if (!fragmentPopped && fragmentManager.findFragmentByTag(fragmentTag) == null) {
FragmentTransaction ftx = fragmentManager.beginTransaction();
ftx.addToBackStack(fragment.getClass().getSimpleName());
ftx.setCustomAnimations(R.anim.slide_in_right,
R.anim.slide_out_left, R.anim.slide_in_left,
R.anim.slide_out_right);
ftx.add(R.id.main_content, fragment);
ftx.commit();
}
}
从右侧滑入
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="true">
<translate android:fromXDelta="100%"
android:toXDelta="0%" android:fromYDelta="0%"
android:toYDelta="0%" android:duration="200">
</translate>
</set>
slide_out_right
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="false">
<translate android:fromXDelta="0%" android:toXDelta="100%"
android:fromYDelta="0%" android:toYDelta="0%"
android:duration="200">
</translate>
</set>
从左侧滑入
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="true">
<translate android:fromXDelta="-100%"
android:toXDelta="0%" android:fromYDelta="0%"
android:toYDelta="0%" android:duration="200">
</translate>
</set>
滑动向左退出。
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="true">
<translate android:fromXDelta="0%"
android:toXDelta="-100%" android:fromYDelta="0%"
android:toYDelta="0%" android:duration="200">
</translate>
</set>
这是如何调用该函数的方法:
openFragment(activity, new MyFragment());