【安卓-优化点】安卓App开发思路 一步一个脚印（四）Fragment的重复利用

Fragment的重复利用

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/main_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
>

<FrameLayout
android:id="@+id/main_fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/white" />

</LinearLayout>

private void replaceFragment(android.support.v4.app.Fragment fragment, String currentTAG) {
[code]     FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.main_fragment_container, fragment, tag);
transaction.commit();

private String mTempFragmentTAG="";//标志当前的栏目

private void replaceFragment(android.support.v4.app.Fragment fragment, String currentTAG) {
if(!currentTAG.equals(mTempFragmentTAG)){//当点击的fragment 不是当前点击的则新建，是则跳过 那么不会执行fragment
FragmentManager mfragmentmanager = getSupportFragmentManager();
FragmentTransaction mfragmentTransaction = mfragmentmanager.beginTransaction();
if(!fragment.isAdded()){
mfragmentTransaction.replace(R.id.main_fragment_container, fragment,currentTAG).commit();
}else{
mfragmentTransaction.show(fragment);
}
mTempFragmentTAG=currentTAG;
}
}