activity+fragment 浅显实例的实现
2016-06-06 09:13
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1.xml
activity_main.xml
fargment_main.xml
list_item_main.xml
2.java
MainActivity.java
activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <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=".MainActivity"> </FrameLayout>
fargment_main.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"> <ListView android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/list"></ListView> </LinearLayout>
list_item_main.xml
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:padding="8dp" > <TextView android:id="@+id/text1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:text="TEXT1" android:textSize="16sp" /> <TextView android:id="@+id/text2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/text1" android:layout_below="@+id/text1" android:text="TEXT2" android:textSize="12sp" /> </RelativeLayout>
2.java
MainActivity.java
public class MainActivity extends FragmentActivity { MapView mMapView = null; private BaiduMap mBaiduMap; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //在使用SDK各组件之前初始化context信息,传入ApplicationContext //注意该方法要再setContentView方法之前实现 setContentView(R.layout.activity_main); if (savedInstanceState == null) { getSupportFragmentManager().beginTransaction().add(R.id.container, new PlaceholderFragment()).commit(); } } public static class PlaceholderFragment extends Fragment implements AdapterView.OnItemClickListener { private ListView listView; private MainAdapter adapter; @Nullable @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment_main, container, false); listView= (ListView) view.findViewById(R.id.list); adapter = new MainAdapter(getContext(),R.layout.list_item_main,getDateBean()); listView.setAdapter(adapter); listView.setOnItemClickListener(this); return view; } public static List<DataBean> getDateBean() { List<DataBean> list = new ArrayList<>(); list.add(new DataBean("基本地图功能", "创建一张百度地图并管理地图的生命周期")); list.add(new DataBean("图层展示", "展示普通图、卫星图、交通流量图及百度城市热力图")); list.add(new DataBean("地图操作功能", "介绍地图基本控制方法")); return list; } @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { Intent intent; switch (position) { case 0: intent = new Intent(getActivity(), BaseMap.class); startActivity(intent); break; case 1: intent = new Intent(getActivity(), Layers.class); startActivity(intent); break; case 2: intent = new Intent(getActivity(), Location.class); startActivity(intent); break; default: break; } } } public static class MainAdapter extends ArrayAdapter<DataBean> { private int resourceID; public MainAdapter(Context context, int resource, List<DataBean> objects) { super(context, resource, objects); resourceID = resource; } @Override public View getView(int position, View conve a07b rtView, ViewGroup parent) { ViewHolder holder; if (convertView == null) { convertView = View.inflate(getContext(), resourceID, null); holder = new ViewHolder(); holder.text1 = (TextView) convertView.findViewById(R.id.text1); holder.text2 = (TextView) convertView.findViewById(R.id.text2); convertView.setTag(holder); } else { holder = (ViewHolder) convertView.getTag(); } DataBean dataBean = getItem(position); holder.text1.setText(dataBean.text1); holder.text2.setText(dataBean.text2); return convertView; } class ViewHolder{ TextView text1; TextView text2; } } public static class DataBean { String text1; String text2; public DataBean(String text1, String text2) { this.text1 = text1; this.text2 = text2; } } }
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