layout: post
title: 单一Activity与多个Fragment
date: 2015-12-28
categories: blog
tags: [Activity,Fragmnet]
category: Android
description: 很多时候,我只想要一个通用的Activity来作为大部分Fragment的依附点,即需要根据startActivity(Intent intent)的Intent中的参数在CommonActivity中动态加载不同的Fragment.

需求

很多时候,我只想要一个通用的Activity来作为大部分Fragment的依附点,即需要根据startActivity(Intent intent)的Intent中的参数在CommonActivity中动态加载不同的Fragment.

实现

• Fragment

  public void jumpToFragment(Class<? extends AbsFragment>    fragmentClass, IFragmentParams params) {
       ActivityParams activityParams = new ActivityParams(fragmentClass, params);
       Intent intent = new Intent(mActivity, CommonActivity.class);
       intent.putExtra(CommonActivity.PARAMS, activityParams);
       startActivity(intent);
  }
  

• ActivityParams

  public class ActivityParams implements Serializable {
      private Class<? extends AbsFragment> mFragmentClazz;
      private IFragmentParams mFragmentParams;
      public ActivityParams(Class<? extends AbsFragment>  mFragmentClazz,   IFragmentParams mFragmentParams) {
          this.mFragmentClazz = mFragmentClazz;
          this.mFragmentParams = mFragmentParams;
      }
  
      public Class<? extends AbsFragment> getFragmentClazz() {
         return mFragmentClazz;
      }
  
      public IFragmentParams getFragmentParams() {
         return mFragmentParams;
      }
  }
  

• CommonActivity

  @Override
  protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     mParams = (ActivityParams) getIntent().getSerializableExtra(PARAMS);
     setContentView(R.layout.fragment_common_layout);
     try {
         //通过AbsFragment的静态方法newInstance(IFragmentParams)构造Fragment
         fragment = (AbsFragment) mParams.getFragmentClazz().getMethod("newInstance",
               IFragmentParams.class).invoke(null, mParams.getFragmentParams());
         if (fragment == null) {
             L.e(TAG, "Fragment==null");
             finish();
             return;
          }                                                                                              getSupportFragmentManager().beginTransaction().add(R.id.klibs_common_fragment,fragment).commit();
        } catch (IllegalAccessException e) {
           e.printStackTrace();
        } catch (InvocationTargetException e) {
           e.printStackTrace();
        } catch (NoSuchMethodException e) {
          e.printStackTrace();
        }
  }