1 //1,fragment静态加载：MainActivity    MainActivty1_2  Myfragment1 2 //2,fragment动态加载  ：MainActivity   Myfragment2 3 //3,fragment生命周期：  Myfragment4_life 4 //4,fragment和：Activity之间通信：：：MainActivity4 Myfragment5 5 public class MainActivity extends Activity implements OnCheckedChangeListener { 6     private RadioGroup group; 7  8     @Override 9     protected void onCreate(Bundle savedInstanceState) {10         super.onCreate(savedInstanceState);11         setContentView(R.layout.main);12         group = (RadioGroup) findViewById(R.id.radioGroup1);13         group.setOnCheckedChangeListener(this);14 15     } 16 17     @Override18     public void onCheckedChanged(RadioGroup group, int checkedId) {19         // TODO Auto-generated method stub20         switch (checkedId) {21         case R.id.radio0: {22             //静态加载fragment：23             //第一个Activity跳转Activity1_2（xml布局中是含有android:name="com.example.fragment.Myfragment1"的fragment标签）24             //Myfragment1类继承fragment25             //Myfragment1类中的xml布局含有TextView和Button26             Intent intent = new Intent(MainActivity.this, MainActivty1_2.class);27             startActivity(intent);28             break;29         }30              //动态加载fragment：31         case R.id.radio1: {32             //创建Myfragment2类继承fragment33             //Myfragment2类中的xml布局含有TextView和Button34             //把fragment2添加到main中的xml中的 LinearLayout布局（id=R.id.frame）35             Myfragment2 fragment2 = new Myfragment2();36             FragmentManager fragmentManager = getFragmentManager();37             FragmentTransaction beginTransaction = fragmentManager.beginTransaction();38             beginTransaction.add(R.id.frame, fragment2);//把fragment2添加到拿个布局39             beginTransaction.addToBackStack(null);//设置物理连接返回键40             beginTransaction.commit();41 42             break;43         }44         case R.id.radio2: {45 46             break;47         }48 49         case R.id.radio3: {50             Intent intent = new Intent(MainActivity.this, MainActivity4.class);51             startActivity(intent);52 53             break;54         }55 56         }57     }58 59 }

 

1 public class MainActivty1_2 extends Activity { 2  3     private TextView textView; 4  5     @Override 6     protected void onCreate(Bundle savedInstanceState) { 7         // TODO Auto-generated method stub 8         super.onCreate(savedInstanceState); 9         setContentView(R.layout.main2);10         Button button = (Button) findViewById(R.id.but);11         button.setText("改变");12         textView = (TextView) findViewById(R.id.text);13         button.setOnClickListener(new OnClickListener() {14 15             @Override16             public void onClick(View v) {17                 // TODO Auto-generated method stub18                 textView.setText("textView改变了");19             }20         });21     }22 }

 

public class Fragment1 extends android.support.v4.app.Fragment {    @Override    public View onCreateView(LayoutInflater inflater, ViewGroup container,            Bundle savedInstanceState) {        // TODO Auto-generated method stub        return inflater.inflate(R.layout.view1, container, false);    }}

 

1 public class Myfragment2 extends Fragment{ 2  3      4     @Override 5     public View onCreateView(LayoutInflater inflater, ViewGroup container, 6             Bundle savedInstanceState) { 7         // TODO Auto-generated method stub 8         //resource:需要加载的布局文件 9         //root：layout的viewGrup10         // attachToRoot:false 不返回父viewGrup11         View view = inflater.inflate(R.layout.fragment, container, false);12         TextView textView=(TextView) view.findViewById(R.id.text);13         textView.setText("动态加载fragment");14         return  view;15     }16     17 }

 

、、//--------------------生命周期--------------------

1 public class Myfragment4_life extends Fragment { 2  3     // 1.当Fragment被添加到Activity时候会回调这个方法，并且只调用一次 4     @Override 5     public void onAttach(Activity activity) { 6         // TODO Auto-generated method stub 7         super.onAttach(activity); 8     } 9 10     // 2.创建fragment时会回调，只调用一次11     @Override12     public void onCreate(Bundle savedInstanceState) {13         // TODO Auto-generated method stub14         super.onCreate(savedInstanceState);15     }16 17     // 3.每次创建都会绘制Fragment的view组件时回调该方法18     @Override19     public View onCreateView(LayoutInflater inflater, ViewGroup container,20             Bundle savedInstanceState) {21         // TODO Auto-generated method stub22         View view = inflater.inflate(R.layout.fragment, container, false);23         TextView textView = (TextView) view.findViewById(R.id.text);24 25         return view;26     }27 28     // 4.当fragment所在的Activity启动完成后调用29     @Override30     public void onActivityCreated(Bundle savedInstanceState) {31         // TODO Auto-generated method stub32         super.onActivityCreated(savedInstanceState);33     }34 35     // 5.进入启动fragment36     @Override37     public void onStart() {38         // TODO Auto-generated method stub39         super.onStart();40     }41 42     // 6.恢复fragment时会被调用，调用onStart()方法后面一定会调用onResume()43     @Override44     public void onResume() {45         // TODO Auto-generated method stub46         super.onResume();47     }48 49     // 7.暂停fragment时会被调用50     @Override51     public void onPause() {52         // TODO Auto-generated method stub53         super.onPause();54     }55 56     // 8.停止fragment时会被调用57     @Override58     public void onStop() {59         // TODO Auto-generated method stub60         super.onStop();61     }62 63     // 9.销毁fragment所包含的view组件时64     @Override65     public void onDestroyView() {66         // TODO Auto-generated method stub67         super.onDestroyView();68     }69 70     // 10.销毁fragment时会被调用71     @Override72     public void onDestroy() {73         // TODO Auto-generated method stub74         super.onDestroy();75     }76 77     // 11.fragment从activity中删除时会回调该方法。只调用一次78     @Override79     public void onDetach() {80         // TODO Auto-generated method stub81         super.onDetach();82     }83 }

//---------------------fragment与activity通信----------------------------

//        Fragment与Activity通信//        （1）Fragment可以调用getActivity()方法获取它所在的Activity；//        （2）Activity可以调用FragmentManager的findFragmentById()//          或者findFragmentByTag()方法获取Fragment。//          Activity --> Fragment：在Activity中创建Bundle数据包，//        并调用Fragment的setArguments(Bundle bundle)方法，//        然后在Fragment中使用getArguments()获取Bundle数据包。//        Fragment --> Activity：需要在Fragment中定义一个内部回调接口，//        再让包含该Fragment的Activity实现该回调接口。//        这样Fragment可调用该回调方法将数据传递给Activity。public class MainActivity4 extends Activity implements MyListener {    private Button button;    private EditText editText;    @Override    protected void onCreate(Bundle savedInstanceState) {        // TODO Auto-generated method stub        super.onCreate(savedInstanceState);        setContentView(R.layout.main4);        button = (Button) findViewById(R.id.send);        editText = (EditText) findViewById(R.id.editText);        button.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                // TODO Auto-generated method stub                String text = editText.getText().toString().trim();                Myfragment5 fMyfragment5 = new Myfragment5();//                  Activity --> Fragment：在Activity中创建Bundle数据包，//                并调用Fragment的setArguments(Bundle bundle)方法，//                然后在Fragment中使用getArguments()获取Bundle数据包。                Bundle bundle = new Bundle();                bundle.putString("name", text);                fMyfragment5.setArguments(bundle);                                FragmentManager fragmentManager = getFragmentManager();                FragmentTransaction beginTransaction = fragmentManager.beginTransaction();                beginTransaction.add(R.id.layout, fMyfragment5, "fragment5");                beginTransaction.commit();                Toast.makeText(MainActivity4.this, "向fragment发送数据"+text, 1).show();            }        });                // 静态加载        FragmentManager fragmentManager = getFragmentManager();        Fragment findFragmentById = fragmentManager.findFragmentById(R.id.f);        Myfragment1 frag = (Myfragment1) findFragmentById;        frag.setAa("xxxxxxxxxxxx静态传值xxx");    }    @Override    public void thank(String code) {        // TODO Auto-generated method stub        Toast.makeText(MainActivity4.this, "成功接收到。。"+code, 1).show();    }}

1 public class Myfragment5 extends Fragment { 2     private String code = "thank you"; 3     public MyListener listener; 4 //    Fragment --> Activity：需要在Fragment中定义一个内部回调接口， 5 //    再让包含该Fragment的Activity实现该回调接口。class MainActivity4 extends Activity implements MyListener 6 //    这样Fragment可调用该回调方法将数据传递给Activity。 7     public interface MyListener { 8         public void thank(String code); 9 10     }11     12     // 1.当Fragment被添加到Activity时候会回调这个方法，并且只调用一次13     @Override14     public void onAttach(Activity activity) {15         // TODO Auto-generated method stub16         listener = (MyListener) activity;17         super.onAttach(activity);18     }19 //-------------------------------接收activity传值-开始--------------------20     @Override21     public View onCreateView(LayoutInflater inflater, ViewGroup container,22             Bundle savedInstanceState) {23         // TODO Auto-generated method stub24         View view = inflater.inflate(R.layout.fragment, container, false);25         TextView textView = (TextView) view.findViewById(R.id.text);26   //获取Bundle()传过来的数据包27         String text = getArguments().get("name") + "";28         textView.setText(text);29         Toast.makeText(getActivity(), "已成功接收" + text, 1).show();30         31 //---------------------------------接收结束-------------------    32         33         Toast.makeText(getActivity(), "向ACtivity发送" + code, 1).show();34 35         listener.thank(code);36 37         return view;38     }39 }

Fragment与Activity通信（1）Fragment可以调用getActivity()方法获取它所在的Activity；（2）Activity可以调用FragmentManager的findFragmentById()或者findFragmentByTag()方法获取Fragment。Activity --> Fragment：在Activity中创建Bundle数据包，并调用Fragment的setArguments(Bundle bundle)方法，然后在Fragment中使用getArguments()获取Bundle数据包。Fragment --> Activity：需要在Fragment中定义一个内部回调接口，再让包含该Fragment的Activity实现该回调接口。这样Fragment可调用该回调方法将数据传递给Activity。

 

 

将数据（这里是字符串 code） 从Fragment 传给 Activity：1.定义一个接口 MyListener，里面定义一个无方法体的方法thank( String str)；2.创建 MyListener对象 listener；3.重写方法 onAttach（Activity activity）;将activity强制转换为MyListener并赋值给 listener；4.在方法 onCreateView中写上 listener.thank(code); 实际上就是把数据 code 传递给了 activity！