• 复用

使用

• 创建继承Fragment的类

• 重写onCreateView方法

• 绑定xml

  View view = inflater.inflate(R.layout.fragment_title,null);
  return view;
  

  静态使用

• 在xml中使用

  <fragment
        android:id="@+id/main_fragment"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:name="wang.ismy.fragment.TitleFragment"
      />
  

动态使用

• 老版本

  button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                FragmentManager manager = getFragmentManager();
                FragmentTransaction transaction = manager.beginTransaction();
                transaction.add(R.id.title_layout,new TitleFragment());
                transaction.commit();
            }
        });
  

• 新版本

getSupportFragmentManager()
                        .beginTransaction()
                        .add(R.id.title_layout,new TitleFragment())
                        .commit();

V4包

动态切换

Random random = new Random();
                if (random.nextBoolean()){
                    getSupportFragmentManager()
                            .beginTransaction()
                            .replace(R.id.title_layout,new TitleFragment())
                            .commit();
                }else{
                    getSupportFragmentManager()
                            .beginTransaction()
                            .replace(R.id.title_layout,new ContentFragment())
                            .commit();
                }

生命周期

通信

Activity 向 Fragment传值

// Activity 端
TitleFragment titleFragment  = new TitleFragment();
                    Bundle bundle = new Bundle();
                    bundle.putString("id", UUID.randomUUID().toString());
                    titleFragment.setArguments(bundle);
                    getSupportFragmentManager()
                            .beginTransaction()
                            .replace(R.id.title_layout,titleFragment)
                            .commit();

// Fragment端
if (getArguments() != null){
            textView.setText(getArguments().getString("id"));
        }

Fragment 向 Activity 传值

• 回调接口

linearLayout.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (listener != null){
                    listener.onClick();
                }

            }
        });


///////////////


 public interface TitleFragmentClickListener{
        void onClick();
    }

    public void setListener(TitleFragmentClickListener listener) {
        this.listener = listener;
    }

titleFragment.setListener(new TitleFragment.TitleFragmentClickListener() {
                        @Override
                        public void onClick() {
                            Toast.makeText(getApplicationContext(),"click 111",Toast.LENGTH_SHORT).show();
                        }
                    });

Fragment 向 Fragment 传值

getFragmentManager().findFragmentById()

ListFragment