我有兩個片段(Fragment1和Fragment2),創建了與自定義TabListener類的ActionBar導航。每個選項卡的內容都是我的片段之一。但現在我有一個問題 - 我無法訪問/獲取片段的實例。從ActionBar選項卡獲取當前片段
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
getSupportActionBar().setNavigationMode(getSupportActionBar().NAVIGATION_MODE_TABS);
Tab tab = getSupportActionBar().newTab()
.setText(R.string.frag1)
.setTabListener(
new MyTabListener(this,
Fragment1.class.getName()));
getSupportActionBar().addTab(tab);
tab = getSupportActionBar().newTab()
.setText(R.string.frag2)
.setTabListener(
new MyTabListener(this,
Fragment2.class.getName()));
getSupportActionBar().addTab(tab);
Fragment1 f1 = (Fragment1) getSupportFragmentManager().findFragmentByTag("FRAG1");
if(f1 != null) {
Toast.makeText(this, "It's not empty", Toast.LENGTH_SHORT).show();
}
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
Toast.makeText(this, "Photo Intent Goes Here", Toast.LENGTH_SHORT).show();
if(data != null) {
Toast.makeText(this, "It's not empty", Toast.LENGTH_SHORT).show();
if (resultCode == RESULT_OK) {
}
} else {
Toast.makeText(this, "It's empty", Toast.LENGTH_SHORT).show();
}
}
private class MyTabListener implements TabListener
{
private SherlockFragment mFragment;
private final Activity mActivity;
private final String mFragName;
public MyTabListener(Activity activity,
String fragName)
{
mActivity = activity;
mFragName = fragName;
}
@Override
public void onTabSelected(Tab tab,
android.support.v4.app.FragmentTransaction ft) {
mFragment = (SherlockFragment) SherlockFragment.instantiate(mActivity,
mFragName);
if(mFragment instanceof Fragment1) {
Fragment1 f1temp = (Fragment1) mFragment;
//Toast.makeText(mActivity, "Frag1", Toast.LENGTH_SHORT).show();
ft.add(android.R.id.content, mFragment,"FRAG1");
}
else {
ft.add(android.R.id.content, mFragment,"ELSE");
}
//Toast.makeText(mActivity, mFragName, Toast.LENGTH_SHORT).show();
}
@Override
public void onTabUnselected(Tab tab,
android.support.v4.app.FragmentTransaction ft) {
ft.remove(mFragment);
mFragment = null;
}
public SherlockFragment getCurrentFragment() {
return mFragment;
}
@Override
public void onTabReselected(Tab tab,
android.support.v4.app.FragmentTransaction ft) {
// TODO Auto-generated method stub
}
}
我不能使用getSupportFragmentManager().findFragmentById(id)
,因爲我沒有ID我也試過getSupportFragmentManager().findFragmentByTag(tag)
但它沒有工作,要麼是因爲我只叫add()
方法FragmentTransaction
類不replace()
這是任何方式獲取當前標籤片段實例,以便我可以調用片段的方法?
更好地解釋你想幹什麼,你有2個片段是什麼,所以你要知道如何創建的每個片段類的方法? – Marckaraujo
我想得到片段的實例,這將允許我調用該片段的方法,傳遞一些變量等。 –