ListFragment的基本使用

時間 2019-12-07

標籤 listfragment 基本使用简体版

原文原文鏈接

ListFragment的基本使用android

效果圖示例ide

//2個佈局一個一個主佈局
//一個右邊碎片的佈局 -- 只有一個TextView控件佈局

//3個類一個MainActivigty類 -- 左邊碎片類xml

// -- 繼承FragmentActivity繼承

//一箇中間碎片類 -- 繼承 ListFragment事件

//一個右邊碎片類 -- 繼承 Fragmentutf-8

detail_fragment.xml佈局文件get

代碼it

<?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/detailText"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="" />

</LinearLayout>io

----------------------

activity_main.xml佈局文件

代碼

</LinearLayout>

==================

MainActivity 類

代碼

public class MainActivity extends FragmentActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
}

//按鈕的事件監聽
public void clickButton(View view){
  FragmentManager fragmentManager = getSupportFragmentManager();
  FragmentTransaction transaction = fragmentManager.beginTransaction();
  //動態建立Fragment(碎片)
  //Center_ListFragment類的onCreateView方法返回視圖到
  //該方法第一個參數的佈局上
  transaction.add(R.id.center, new Center_ListFragment(), "center_fragment");
  transaction.commit();
}
}

--------------------------

中間碎片類

代碼

public class Center_ListFragment extends ListFragment {

private List<String> list;
private ArrayAdapter<String> adapter;
@Override
public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  //初始化listview數據
  list = new ArrayList<String>();
  for(int i = 0;i<20;i++){
   list.add("O(∩_∩O哈" + i);
  }
     adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1,list);
  //ListFragment適配器 -- ListFragment不用佈局ListView視圖了
     setListAdapter(adapter );
}
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
  super.onListItemClick(l, v, position, id);
  //獲取Fragment管理器
  FragmentManager fragmentManager = getFragmentManager();
  //經過Fragment管理器開啓一個事物
  FragmentTransaction transaction = fragmentManager.beginTransaction();
  //new一個Right_fragment類該類的onCreateView方法會返回一個View(視圖)
  Right_fragment rf = new Right_fragment();
  //獲取listview點中的內容
  String item = adapter.getItem(position);
  transaction.replace(R.id.right, rf);
// transaction.add(R.id.right, rf);
  Bundle bundle = new Bundle();
  bundle.putString("center", item);
  //setArguments -- 繼承Fragment類有的方法
  //該方法用來在個個Fragment(碎片)之間傳遞數據
  rf.setArguments(bundle);
// Log.i("data","item:" + item);
  //啓動事物
  transaction.commit();
}
}

==================

右邊碎片類

代碼

public class Right_fragment extends Fragment {
private TextView textview;
@Override
public View onCreateView(LayoutInflater inflater,
   @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {

  View view = inflater.inflate(R.layout.detail_fragment, container, false);
  textview = (TextView) view.findViewById(R.id.detailText);
  //Log.i("data", "bundle前...");
  //利用getArguments方法接收數據
  Bundle bundle = getArguments();
  String data = bundle.getString("center");
  textview.setText(data);
  //Log.i("data", "sadfsafd:" + bundle.getString("center"));
  return view;
}
}