Fragment and activity的生命周期对比和区别

官方文档中有详细的文字说明，不过最好还是实践下，熟悉过程。http://developer.android.com/guide/components/fragments.html

一、Activity的生命周期图：



二、Fragment生命周期图



三、对比图



四、测试代码：

[java] view
plaincopy

package com.goso.testapp;

import android.app.Activity;

import android.app.ListFragment;

import android.os.Bundle;

import android.util.Log;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ArrayAdapter;

import android.widget.ListView;

/**

* Demonstration of using ListFragment to show a list of items

* from a canned array.

*/

public class FragmentListArray extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

Log.e("HJJ", "Activity &&&& onCreate...");

// Create the list fragment and add it as our sole content.

if (getFragmentManager().findFragmentById(android.R.id.content) == null) {

ArrayListFragment list = new ArrayListFragment();

getFragmentManager().beginTransaction().add(android.R.id.content, list).commit();

}

}

@Override

protected void onStart() {

// TODO Auto-generated method stub

super.onStart();

Log.e("HJJ", "Activity &&&& onStart...");

}

@Override

protected void onResume() {

// TODO Auto-generated method stub

super.onResume();

Log.e("HJJ", "Activity &&&& onResume...");

}

@Override

protected void onStop() {

// TODO Auto-generated method stub

super.onStop();

Log.e("HJJ", "Activity &&&& onStop...");

}

@Override

protected void onPause() {

// TODO Auto-generated method stub

super.onPause();

Log.e("HJJ", "Activity &&&& onPause...");

}

@Override

protected void onDestroy() {

// TODO Auto-generated method stub

super.onDestroy();

Log.e("HJJ", "Activity &&&& onDestroy...");

}

public static class ArrayListFragment extends ListFragment {

@Override

public void onAttach(Activity activity) {

// TODO Auto-generated method stub

Log.e("HJJ", "ArrayListFragment **** onAttach...");

super.onAttach(activity);

}

@Override

public void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

Log.e("HJJ", "ArrayListFragment **** onCreate...");

super.onCreate(savedInstanceState);

}

@Override

public View onCreateView(LayoutInflater inflater, ViewGroup container,

Bundle savedInstanceState) {

// TODO Auto-generated method stub

Log.e("HJJ", "ArrayListFragment **** onCreateView...");

return super.onCreateView(inflater, container, savedInstanceState);

}

@Override

public void onActivityCreated(Bundle savedInstanceState) {

super.onActivityCreated(savedInstanceState);

Log.e("HJJ", "ArrayListFragment **** onActivityCreated...");

String[] array = new String[]{"C++", "JAVA", "PYTHON"};

setListAdapter(new ArrayAdapter<String>(getActivity(),

android.R.layout.simple_list_item_1, array));

}

@Override

public void onStart() {

// TODO Auto-generated method stub

Log.e("HJJ", "ArrayListFragment **** onStart...");

super.onStart();

}

@Override

public void onResume() {

Log.e("HJJ", "ArrayListFragment **** onResume...");

// TODO Auto-generated method stub

super.onResume();

}

@Override

public void onPause() {

Log.e("HJJ", "ArrayListFragment **** onPause...");

// TODO Auto-generated method stub

super.onPause();

}

@Override

public void onStop() {

Log.e("HJJ", "ArrayListFragment **** onStop...");

// TODO Auto-generated method stub

super.onStop();

}

@Override

public void onDestroyView() {

Log.e("HJJ", "ArrayListFragment **** onDestroyView...");

// TODO Auto-generated method stub

super.onDestroyView();

}

@Override

public void onDestroy() {

// TODO Auto-generated method stub

Log.e("HJJ", "ArrayListFragment **** onDestroy...");

super.onDestroy();

}

@Override

public void onDetach() {

Log.e("HJJ", "ArrayListFragment **** onDetach...");

// TODO Auto-generated method stub

super.onDetach();

}

@Override

public void onListItemClick(ListView l, View v, int position, long id) {

Log.i("FragmentList", "Item clicked: " + id);

}

}

}

五、结果

[java] view
plaincopy

onCreate过程

01-22 15:30:28.091: E/HJJ(10315): Activity &&&& onCreate...

01-22 15:30:28.091: E/HJJ(10315): ArrayListFragment **** onAttach...

01-22 15:30:28.091: E/HJJ(10315): ArrayListFragment **** onCreate...

01-22 15:30:28.115: E/HJJ(10315): ArrayListFragment **** onCreateView...

01-22 15:30:28.123: E/HJJ(10315): ArrayListFragment **** onActivityCreated...

onStart过程

01-22 15:30:28.123: E/HJJ(10315): Activity &&&& onStart...

01-22 15:30:28.123: E/HJJ(10315): ArrayListFragment **** onStart...

onResume过程

01-22 15:30:28.123: E/HJJ(10315): Activity &&&& onResume...

01-22 15:30:28.123: E/HJJ(10315): ArrayListFragment **** onResume...

onPause过程

01-22 15:31:26.748: E/HJJ(10315): ArrayListFragment **** onPause...

01-22 15:31:26.748: E/HJJ(10315): Activity &&&& onPause...

onStop过程

01-22 15:31:27.638: E/HJJ(10315): ArrayListFragment **** onStop...

01-22 15:31:27.638: E/HJJ(10315): Activity &&&& onStop...

onStart过程

01-22 15:31:57.537: E/HJJ(10315): Activity &&&& onStart...

01-22 15:31:57.537: E/HJJ(10315): ArrayListFragment **** onStart...

onResume过程

01-22 15:31:57.537: E/HJJ(10315): Activity &&&& onResume...

01-22 15:31:57.537: E/HJJ(10315): ArrayListFragment **** onResume...

onPause过程

01-22 15:32:47.412: E/HJJ(10315): ArrayListFragment **** onPause...

01-22 15:32:47.412: E/HJJ(10315): Activity &&&& onPause...

onStop过程

01-22 15:32:47.865: E/HJJ(10315): ArrayListFragment **** onStop...

01-22 15:32:47.865: E/HJJ(10315): Activity &&&& onStop...

onDestroy过程

01-22 15:32:47.865: E/HJJ(10315): ArrayListFragment **** onDestroyView...

01-22 15:32:47.865: E/HJJ(10315): ArrayListFragment **** onDestroy...

01-22 15:32:47.865: E/HJJ(10315): ArrayListFragment **** onDetach...

01-22 15:32:47.865: E/HJJ(10315): Activity &&&& onDestroy...