【安卓笔记】Fragments之间传值

1.一个FragmentActivity(FragmentsActivity)

2.一个ListFragment(Fragment1),其中有很多标题

3.点击其中一个标题，跳转到一个Fragment(Fragment2)，并在此显示点击的标题

注意到Fragment可以通过setArguments和getArguments来通过Bundle传值，在ListFragment的点击事件中，将得到的标题，存放到一个Bundle中，传递到Fragment中，再去设置Fragment中的标题为点击的文字。

Fragment中

public class Fragment2 extends Fragment {
	private static Bundle bundle;
	
	static Fragment2 newInstance(Bundle b){
		Fragment2 f2 = new Fragment2();
		bundle = b;
		return f2;
		
	}
	
	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState) {
		View v = inflater.inflate(R.layout.fragment2, container,false);
		TextView title = (TextView)v.findViewById(R.id.title2);
		title.setText(bundle.getString("title"));
		
		return v;
	}
	
	@Override
	public void onCreate(Bundle savedInstanceState) {
		
		super.onCreate(savedInstanceState);
	}

}

 

Fragment的布局

<?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/title2"
        android:layout_width="fill_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:gravity="center"
        android:text="class test"
        />
    <EditText 
        android:layout_width="fill_parent"
        android:layout_height="0dp"
        android:layout_weight="4"
        android:background="@android:color/holo_green_light"
        android:gravity="top"
        />
</LinearLayout>

 

设置EditText的光标指向第一行

   android:gravity="top"

 

ListFragment中

	@Override
	public void onListItemClick(ListView l, View v, int position, long id) {
		super.onListItemClick(l, v, position, id);
		
		System.out.println(l.getChildAt(position));
		HashMap<String, Object> view= (HashMap<String, Object>) l.getItemAtPosition(position);
		String title = view.get("title").toString();
		Bundle b = new Bundle();
		b.putString("title", title);
		Fragment2 f2 = Fragment2.newInstance(b);
		
		getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.fragments, f2).commit();
	}

 

效果：点击class 3