我有一个由MainActivity调用的活动。 它是由Android Studio为我预先制作的。
public class DetailActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_detail);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.detail, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
我得到的片段也是自动生成的,但有一些变化。
public class DetailActivityFragment extends Fragment {
public DetailActivityFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
Intent intent = getActivity().getIntent();
View rootView = inflater.inflate(R.layout.fragment_detail, container, false);
if(intent != null && intent.hasExtra(Intent.EXTRA_TEXT)){
String forecastStr = intent.getStringExtra(Intent.EXTRA_TEXT);
TextView textView = (TextView) rootView.findViewById(R.id.detail_text);
textView.setText(forecastStr);
}
return rootView;
}
}
但是onCreateView方法甚至都没有执行。我该怎么办呢?
这是fragment_detail.xml:
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="app.com.example.android.sunshine.DetailActivityFragment">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
</RelativeLayout>
这是activity_detail.xml:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.android.sunshine.app.DetailActivity"
tools:ignore="MergeRootFrame">
<TextView
android:id="@+id/detail_text"
android:text="Example"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
</FrameLayout>
答案 0 :(得分:2)
在你的帖子中你没有显示你创建片段的位置,以防你不这样做,这是一个例子:
DetailActivityFragment fragment = new DetailActivityFragment();
if (fragment != null) {
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.frame_container, fragment).commit();
} else {
// error in creating fragment
Log.e(LOG_TAG, "Error in creating fragment");
}