我对片段不熟悉,我尝试使用这些片段。我的活动中的xml是:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/container"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".Loguin"
tools:ignore="MergeRootFrame">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Fragment Test"
android:id="@+id/btn_FragmentTest"
android:layout_gravity="center_horizontal"
android:layout_marginTop="20dp"
android:layout_marginBottom="0dp" />
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
android:id="@+id/frgContainer"
android:layout_marginTop="20dp">
<fragment
android:id="@+id/frgLoguin"
android:layout_marginTop="20dp"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:name="habitatprojects.hubbuildings.Loguin$PlaceholderFragment"
tools:layout="@layout/fragment_loguin" />
</LinearLayout>
</LinearLayout>
我想改变LinearLayout里面的片段,我的mainActivity类是:
public class Loguin extends Activity {
private int num = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_loguin);
if (savedInstanceState == null) {
getFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment())
.commit();
}
Button btnBoton1 = (Button)findViewById(R.id.btn_FragmentTest);
btnBoton1.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0)
{
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
if(num==0)
{
fragmentTransaction.replace(R.id.frgContainer, new PlaceholderFragment())
.commit();
num++;
}
else{
if(num==1)
{
fragmentTransaction.replace(R.id.frgContainer, new PlaceholderFragment2())
.commit();
num++;
}
else{
fragmentTransaction.replace(R.id.frgContainer, new PlaceholderFragment3())
.commit();
num = 0;
}
}
}
});
}
我的占位符函数是:
public static class PlaceholderFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_loguin, container, false);
}
}
public static class PlaceholderFragment2 extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_blank, container, false);
}
}
public static class PlaceholderFragment3 extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_blank2, container, false);
}
}
为什么我一按按钮就不工作了?我做错什么了?为我的英语道歉,提前感谢!
如果你需要更多的代码或信息,请告诉我,谢谢!
PD 1:当我调试我的设备时,日志猫只会说我:
11-18 11:33:30.775 6065-6065/居住项目.枢纽建筑I/ViewRootImpl ▪ ViewRoot的触摸事件:11-18 11:33:30.835 6065-6065/居住项目. hubbuilding I/ViewRootImpl﹕ ViewRoot的触摸事件:补漆
2条答案
按热度按时间yhxst69z1#
如此简单:
您的主要活动很可能如下所示。activity_main.xml
假设你有一个片段
OneRow
。下面是添加三行的方法。
请注意,在
.add
中,您只需传入布局idR.id.your_vertical_list
。通常您需要行,因此
但是,请注意,通常最好为每个项目提交,特别是在设置任何文本标签等时。例如
soat7uwm2#
解决了我只需要改变我的线性布局为框架布局!谢谢大家!