Android Fragment，视图未删除 [英] Android Fragment , view is not removed
问题描述
我开发了一个应用程序，因为我有一个零碎的交易，
MainActivity包含Fragment View.
MainActivity在屏幕顶部有三个Button，当我们将此Activity移到另一个Fragment时，它们保持不变，当单击三个中的MainActivity Fragment时，只有MainActivity Fragment零件改变./p>
但是，我的问题是，当单击First-Button时，当从此MainActivity移至Fragment时，这是可以的，但是当我单击Second-Button时，结果是第一个Fragment.
它在同一Activity中，因此，我无法通过remove(fr).commit();删除Fragment
因为如果我这样做，那么它将变为不可点击，可能会被片段删除，因此单击下一个按钮时不会响应.
总体结果，它同时显示FirstFragment和NewFragment屏幕，当我移到NewFragment时如何删除FirstFragment屏幕?
在MainActivity中，三个按钮具有以下代码以更改片段:
主要活动:
public class MasterActivity extends Activity {
ImageView imgOne, imgTwo, imgThree;
Fragment fr;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_master);
imgOne = (ImageView) findViewById(R.id.imgOne);
imgTwo = (ImageView) findViewById(R.id.imgTwo);
imgThree = (ImageView) findViewById(R.id.imgThree);
imgOne.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
fr = new FirstFragment();
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.replace(R.id.fragment_place, fr);
fragmentTransaction.addToBackStack(null);
//fragmentTransaction.remove(fr).commit();
//getFragmentManager().beginTransaction().remove(fr).commit();
fragmentTransaction.commit();
}
});
imgTwo.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
fr = new SecondFragment();
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.replace(R.id.fragment_place, fr);
fragmentTransaction.addToBackStack(null);
//fragmentTransaction.remove(fr).commit();
// getFragmentManager().beginTransaction().remove(fr).commit();
fragmentTransaction.commit();
}
});
其xml文件如下:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="#000000"
android:gravity="bottom"
android:weightSum="3" >
<ImageView
android:id="@+id/imgOne"
android:layout_width="0dp"
android:layout_height="27dp"
android:layout_gravity="center"
android:layout_weight="1"
android:src="@drawable/img1" />
<ImageView
android:id="@+id/imgTwo"
android:layout_width="0dp"
android:layout_gravity="center"
android:layout_height="27dp"
android:layout_weight="1"
android:src="@drawable/img2"/>
<ImageView
android:id="@+id/imgThree"
android:layout_width="0dp"
android:layout_gravity="center"
android:layout_height="27dp"
android:layout_weight="1"
android:src="@drawable/img3" />
</LinearLayout>
<fragment
android:id="@+id/fragment_place"
android:name="packagename.FirstFragment"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.87"/>
<LinearLayout/>
<LinearLayout/>
第一个片段:
public class FirstFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View r = inflater.inflate(R.layout.first_fratgment, container, false);
return r;
}
}
第二个片段:
public class SecondFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View r = inflater.inflate(R.layout.second_fratgment, container, false);
return r;
}
}
但是，当单击一个按钮Fragment按钮到另一个按钮时，它将同时显示第一和第二Fragment屏幕.
那么如何解决它以及如何在第二次单击时删除第一个视图?
我用了
fragmentTransaction.remove(fr).commit();
还有这个
getFragmentManager().beginTransaction().remove(fr).commit();
但是它不起作用.
布局中声明的片段被Android区别对待.替换
<fragment
android:id="@+id/fragment_place"
android:name="packagename.FirstFragment"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.87"/>
(具有您选择的FrameLayout或ViewGroup的子类)，并以编程方式处理所有交易.其余的对我来说很好
I have developed an app, in that I have a fragment transaction,
MainActivity contains Fragment View.
MainActivity have three Button on top of the screen, that remain same when we go this Activity to another Fragment, only MainActivity Fragment part change when we click out of three.
But, my problem is that when I move from the this MainActivity to Fragment when click on First-Button that is OK, but when I click on Second-Button, result is overwrite the screen with first Fragment to another Fragment.
it is in same Activity so , I can not remove Fragment through remove(fr).commit();
Because if I do that then it become non-clickable may be fragment remove so not response on click of next button.
overall result, It display both FirstFragment and NewFragment Screen , when i move to NewFragment how i remove the FirstFragment screen ?
In MainActivity three button have following code to change fragment :
Main Activity :
public class MasterActivity extends Activity {
ImageView imgOne, imgTwo, imgThree;
Fragment fr;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_master);
imgOne = (ImageView) findViewById(R.id.imgOne);
imgTwo = (ImageView) findViewById(R.id.imgTwo);
imgThree = (ImageView) findViewById(R.id.imgThree);
imgOne.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
fr = new FirstFragment();
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.replace(R.id.fragment_place, fr);
fragmentTransaction.addToBackStack(null);
//fragmentTransaction.remove(fr).commit();
//getFragmentManager().beginTransaction().remove(fr).commit();
fragmentTransaction.commit();
}
});
imgTwo.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
fr = new SecondFragment();
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.replace(R.id.fragment_place, fr);
fragmentTransaction.addToBackStack(null);
//fragmentTransaction.remove(fr).commit();
// getFragmentManager().beginTransaction().remove(fr).commit();
fragmentTransaction.commit();
}
});
its xml file like following :
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="#000000"
android:gravity="bottom"
android:weightSum="3" >
<ImageView
android:id="@+id/imgOne"
android:layout_width="0dp"
android:layout_height="27dp"
android:layout_gravity="center"
android:layout_weight="1"
android:src="@drawable/img1" />
<ImageView
android:id="@+id/imgTwo"
android:layout_width="0dp"
android:layout_gravity="center"
android:layout_height="27dp"
android:layout_weight="1"
android:src="@drawable/img2"/>
<ImageView
android:id="@+id/imgThree"
android:layout_width="0dp"
android:layout_gravity="center"
android:layout_height="27dp"
android:layout_weight="1"
android:src="@drawable/img3" />
</LinearLayout>
<fragment
android:id="@+id/fragment_place"
android:name="packagename.FirstFragment"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.87"/>
<LinearLayout/>
<LinearLayout/>
First Fragment :
public class FirstFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View r = inflater.inflate(R.layout.first_fratgment, container, false);
return r;
}
}
Second Fragment :
public class SecondFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View r = inflater.inflate(R.layout.second_fratgment, container, false);
return r;
}
}
But when click on one button Fragment button to another it display both first and second Fragment screens.
So how to resolve it and how to remove first view when second click?
I used this
fragmentTransaction.remove(fr).commit();
and this
getFragmentManager().beginTransaction().remove(fr).commit();
but it's not working.
Fragment declared in the layout are treated differently by Android. Replace
<fragment
android:id="@+id/fragment_place"
android:name="packagename.FirstFragment"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.87"/>
with a FrameLayout, or a subclass of ViewGroup of your choice, and handle all the transactions programmatically. The rest looks good to me
这篇关于Android Fragment，视图未删除的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
