【Android开发

【Android开发

Android笔记

​ ——Fragmentation
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依赖框架：Fragmentation

一：优势及作用

1. 封装了很多好用的方法
2. 解决了一些官方Fragment库中存在的一些Bug

二：Fragmentation的配置

1. dependencies中添加（注入依赖）

   implementation &#keyword:fragmentation:1.3.6'
   implementation &#keyword:fragmentation-swipeback:1.3.6'
   

三:使用

1. 可创建悬浮球在开发得时候查看栈

   1. 创建Application

      public class App extends Application {@Overridepublic void onCreate() {Create();// 设置 栈视图 模式为 （默认）悬浮球模式   //	SHAKE: 摇一摇唤出  NONE：隐藏， 仅在Debug环境生效Fragmentation.builder().stackViewMode(Fragmentation.BUBBLE).debug(BuildConfig.DEBUG).install();}
      }
      

   2. 在AndroidManifest添加全局配置

      android:name=".App"
      

2. 基本配置

   1. Activity 必须继承SupportActivity

      @Override
      protected void onCreate(Bundle savedInstanceState) {Create(savedInstanceState);setContentView(R.layout.activity_main);initView();//绑定控件//首次加载，如果当前Activity没有Fragment1，则创建一个if (findFragment(Fragment1.class) == null) {loadRootFragment(R.id.fl, wInstance());//设置全局的Fragment切换样式//DefaultNoAnimator 无切换样式//DefaultHorizontalAnimator 横向切换//DefaultVerticalAnimator 总想切换setFragmentAnimator(new DefaultHorizontalAnimator());}
      }
      

   2. Fragment 必须继承SupportFragment

      public class Fragment1 extends SupportFragment {public static Fragment1 newInstance() {return new Fragment1();}@Nullable@Overridepublic View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {return inflater.inflate(R.layout.fm1, null);}
      }
      

   3. 需要传参的Fragment

      public class Fragment2 extends SupportFragment {//关键代码public static Fragment2 newInstance(Bundle args) {Fragment2 fragment = new Fragment2();fragment.setArguments(args);return fragment;}@Nullable@Overridepublic View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {return inflater.inflate(R.layout.fm2, null);}@Overridepublic void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {ViewCreated(view, savedInstanceState);Log.e("aaa","message:"+getArguments().getString("message", "No word"))//操作传值}
      }
      

3. 关于Activity启动Fragment

   1. 启动

      loadRootFragment(R.id.fl, wInstance());
      

   2. 启动+传值

      Bundle bundle = new Bundle();
      bundle.putString("message", "Hello World");
      loadRootFragment(R.id.fl, wInstance(bundle));
      

   3. Fragment已启动但要传参

      //Fragment2中添加
      @Override
      public void onNewBundle(Bundle args) {NewBundle(args);Log.e("aaa","message:"+getArguments().getString("message", "No word"))//操作传值
      }
      //Activity传值
      Fragment2 fragment=findFragment(Fragment2.class);
      NewBundle(bundle);
      

4. 关于Fragment启动Fragment

   1. 从A到B

      //Fragment2
      wInstance());//参数2，设置启动Fragment模式，同Activity的四种启动模式，默认SINGLETASK
      

   2. 从A到B，关掉A

      wInstance());
      

   3. 从A到B，并给B传值

      Bundle bundle = new Bundle();
      bundle.putString("message", "Hello World");
      wInstance(bundle));
      

   4. 从A到B，B返回值给A

      //Fragment1启动Fragment2
      Bundle bundle = new Bundle();
      bundle.putString("message", "Hello World");
      wInstance(bundle),1);//Fragment1写接收方法
      @Override
      public void onFragmentResult(int requestCode, int resultCode, Bundle data) {FragmentResult(requestCode, resultCode, data);if (requestCode==1 && resultCode==RESULT_OK && data!=null){Log.e("aaa","data:"&#String("msg"));}
      }//Fragment2写传值方法
      Bundle bundle=new Bundle();
      bundle.putString("msg","Hello fm1");
      setFragmentResult(RESULT_OK,bundle);//当点击手机的返回键，就会触发Fragment1的onFragmentResult
      

5. 返回键

   //Activity中
   @Override
   public void onBackPressedSupport() {int count = getSupportFragmentManager().getBackStackEntryCount();if (count == 0){BackPressedSupport();//默认返回键规则}else {getSupportFragmentManager().popBackStack();//将栈顶Fragment移除}
   }
   

参考资料：