Fragment的简单demo
package com.example.googleandroiddemo;
//
//import android.app.Activity;
//import android.os.Bundle;
//import android.support.v4.app.FragmentTransaction;
//import android.support.v4.app.ListFragment;
//import android.view.View;
//import android.widget.ArrayAdapter;
//import android.widget.ListView;
//
//public class MainActivity extends Activity {
// @Override
// protected void onCreate(Bundle savedInstanceState) {
// super.onCreate(savedInstanceState);
//
// setContentView(R.layout.fragment_layout);
// }
//
//
// public static class TitlesFragment extends ListFragment {
// public TitlesFragment() {
// super();
// // TODO Auto-generated constructor stub
// }
//
// public static TitlesFragment newInstance(int index) {
// TitlesFragment f = new TitlesFragment();
//
// // Supply index input as an argument.
//// Bundle args = new Bundle();
//// args.putInt("index", index);
//// f.setArguments(args);
//
// return f;
// }
//
// boolean mDualPane;
// int mCurCheckPosition = 0;
// String str[] = { "321321", "312312", "312312", "321321312","eqweqwewqeqw","eqwewqeqwwe","eqweqweqwerewre","r4r4r4t","eqwewqe" };
// @Override
// public void onActivityCreated(Bundle savedInstanceState) {
// super.onActivityCreated(savedInstanceState);
//
// // Populate list with our static array of titles.
// setListAdapter(new ArrayAdapter<String>(getActivity(),
// android.R.layout.simple_list_item_activated_1,
// str));
//
// // Check to see if we have a frame in which to embed the details
// // fragment directly in the containing UI.
// View detailsFrame = getActivity().findViewById(R.id.details);
// mDualPane = detailsFrame != null
// && detailsFrame.getVisibility() == View.VISIBLE;
//
// if (savedInstanceState != null) {
// // Restore last state for checked position.
// mCurCheckPosition = savedInstanceState.getInt("curChoice", 0);
// }
//
// if (mDualPane) {
// // In dual-pane mode, the list view highlights the selected item.
// getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
// // Make sure our UI is in the correct state.
// showDetails(mCurCheckPosition);
// }
// }
//
// @Override
// public void onSaveInstanceState(Bundle outState) {
// super.onSaveInstanceState(outState);
// outState.putInt("curChoice", mCurCheckPosition);
// }
//
// @Override
// public void onListItemClick(ListView l, View v, int position, long id) {
// showDetails(position);
// }
//
// /**
// * Helper function to show the details of a selected item, either by
// * displaying a fragment in-place in the current UI, or starting a whole new
// * activity in which it is displayed.
// */
// void showDetails(int index) {
// mCurCheckPosition = index;
//
// if (mDualPane) {
// // We can display everything in-place with fragments, so update
// // the list to highlight the selected item and show the data.
// getListView().setItemChecked(index, true);
//
// // Check what fragment is currently shown, replace if needed.
// DetailsFragment details = (DetailsFragment) getFragmentManager()
// .findFragmentById(R.id.details);
// if (details == null || details.getShownIndex() != index) {
// // Make new fragment to show this selection.
// details = DetailsFragment.newInstance(index);
//
// // Execute a transaction, replacing any existing fragment
// // with this one inside the frame.
// FragmentTransaction ft = getFragmentManager()
// .beginTransaction();
// ft.replace(R.id.details, details);
// ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
// ft.commit();
// }
//
// } else {
// // Otherwise we need to launch a new activity to display
// // the dialog fragment with selected text.
// // Intent intent = new Intent();
// // intent.setClass(getActivity(), DetailsActivity.class);
// // intent.putExtra("index", index);
// // startActivity(intent);
// }
// }
// }
//}
import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Fragment;
import android.app.FragmentTransaction;
import android.app.ListFragment;
import android.os.Bundle;
//import android.support.v4.app.Fragment;
//import android.support.v4.app.FragmentTransaction;
//import android.support.v4.app.ListFragment;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.ScrollView;
import android.widget.TextView;
public class MainActivity extends Activity {
public static String[] array = { "text1,", "text2", "text3", "text4",
"text5,", "text6", "text7", "text8" };
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_layout);
}
public static class TitlesFragment extends ListFragment {
boolean mDualPane;
int mCurCheckPosition = 0;
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
System.out.println("Fragment-->onCreate");
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
System.out.println("Fragment-->onCreateView");
return super.onCreateView(inflater, container, savedInstanceState);
}
@Override
public void onPause() {
// TODO Auto-generated method stub
super.onPause();
System.out.println("Fragment-->onPause");
}
@Override
public void onStop() {
// TODO Auto-generated method stub
super.onStop();
System.out.println("Fragment-->onStop");
}
@Override
public void onAttach(Activity activity) {
// TODO Auto-generated method stub
super.onAttach(activity);
System.out.println("Fragment-->onAttach");
}
@Override
public void onStart() {
// TODO Auto-generated method stub
super.onStart();
System.out.println("Fragment-->onStart");
}
@Override
public void onResume() {
// TODO Auto-generated method stub
super.onResume();
System.out.println("Fragment-->onResume");
}
@Override
public void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
System.out.println("Fragment-->onDestroy");
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
System.out.println("Fragment-->onActivityCreted");
setListAdapter(new ArrayAdapter<String>(getActivity(),
android.R.layout.simple_list_item_1, array));
View detailsFrame = getActivity().findViewById(R.id.details);
mDualPane = detailsFrame != null
&& detailsFrame.getVisibility() == View.VISIBLE;
if (savedInstanceState != null) {
mCurCheckPosition = savedInstanceState.getInt("curChoice", 0); //从保存的状态中取出数据
}
if (mDualPane) {
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
showDetails(mCurCheckPosition);
}
}
@Override
public void onSaveInstanceState(Bundle outState) {
// TODO Auto-generated method stub
super.onSaveInstanceState(outState);
outState.putInt("curChoice", mCurCheckPosition);//保存当前的下标
}
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
// TODO Auto-generated method stub
super.onListItemClick(l, v, position, id);
showDetails(position);
}
void showDetails(int index) {
mCurCheckPosition = index;
if (mDualPane) {
getListView().setItemChecked(index, true);
DetailsFragment details = (DetailsFragment) getFragmentManager()
.findFragmentById(R.id.details);
if (details == null || details.getShownIndex() != index) {
details = DetailsFragment.newInstance(mCurCheckPosition);
//得到一个fragment 事务（类似sqlite的操作）
FragmentTransaction ft = getFragmentManager()
.beginTransaction();
ft.replace(R.id.details, details);//将得到的fragment 替换当前的viewGroup内容，add则不替换会依次累加
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);//设置动画效果
ft.commit();//提交
}
} else {
new AlertDialog.Builder(getActivity()).setTitle(
android.R.string.dialog_alert_title).setMessage(
array[index]).setPositiveButton(android.R.string.ok,
null).show();
}
}
}
/**
* 作为界面的一部分，为fragment 提供一个layout
* @author terry
*
*/
public static class DetailsFragment extends Fragment {
public static DetailsFragment newInstance(int index) {
DetailsFragment details = new DetailsFragment();
Bundle args = new Bundle();
args.putInt("index", index);
details.setArguments(args);
return details;
}
public int getShownIndex() {
return getArguments().getInt("index", 0);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// TODO Auto-generated method stub
if (container == null)
return null;
ScrollView scroller = new ScrollView(getActivity());
TextView text = new TextView(getActivity());
int padding = (int) TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP, 4, getActivity()
.getResources().getDisplayMetrics());
text.setPadding(padding, padding, padding, padding);
scroller.addView(text);
text.setText(array[getShownIndex()]);
return scroller;
}
}
}
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="horizontal" >
<fragment class="com.example.googleandroiddemo.MainActivity$TitlesFragment" android:id="@+id/titles" android:layout_weight="1"
android:layout_width="0px" android:layout_height="match_parent"
/>
<FrameLayout android:id="@+id/details" android:layout_weight="1" android:layout_width="0px" android:layout_height="match_parent"
android:background="?android:attr/detailsElementBackground"
></FrameLayout>
</LinearLayout>