为什么我传过去的值显示为null？
布局：
<?xml version="1.0" encoding="utf-8"?>
<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="vertical"
tools:context="io.github.joahyau.studying.DynamicFragmentActivity">
<Button
android:id="@+id/load"
android:layout_width="match_parent"
android:layout_height="80dp"
android:text="run" />
<LinearLayout
android:id="@+id/container"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" />
</LinearLayout>
fragment xml：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/fragment_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
Activity的java代码：
public class DynamicFragmentActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_dynamic_fragment);
findViewById(R.id.load).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
MyFragment myFragment = new MyFragment();
Bundle bundle = new Bundle();
bundle.putString("text", "demo");
myFragment.setArguments(bundle);
FragmentManager fragmentManager = getFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.add(R.id.container, myFragment);
fragmentTransaction.commit();
}
});
}
}
fragment的java代码：
public class MyFragment extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.myfragment, container, false);
TextView textView = (TextView) view.findViewById(R.id.fragment_text);
String text = getArguments().getBundle("text")+"";
textView.setText(text);
return view;
}
}
