// BaseActivity 是實現的一些公共的變量和方法，可以暫時為空的類

public class HomeActivity extends BaseActivity implements View.OnClickListener {
// 下面的四個按鈕private TextView mHomeView;private TextView mPondView;private TextView mMessageView;private TextView mMineView;
// 相對布局的 layout 里面裝著2個textView 分別放著 圖標和文字private RelativeLayout mHomeLayout;private RelativeLayout mPondLayout;private RelativeLayout mMessageLayout;private RelativeLayout mMineLayout;// 聲明fragmentManager 和四個fragment 以及當前的fragmentprivate FragmentManager fm;private HomeFragment mHomeFragment;private Fragment mCommonFragmentOne;private MessageFragment mMessageFragment;private MineFragment mMineFragment;private Fragment mCurrent;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_home_layout);
　　 // 初始化控件變量initView();
// 創建首頁的FragmentmHomeFragment = new HomeFragment();
// 得到fragment 管理器，Activity 基類里面定義的fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
// 使用homeFragment 替換 content_layout 布局fragmentTransaction.replace(R.id.content_layout, mHomeFragment);fragmentTransaction.commit();}private void initView() {
// 先初始化layout 并賦值其點擊的方法mHomeLayout = (RelativeLayout) findViewById(R.id.home_layout_view);mHomeLayout.setOnClickListener(this);mPondLayout = (RelativeLayout) findViewById(R.id.pond_layout_view);mPondLayout.setOnClickListener(this);mMessageLayout = (RelativeLayout) findViewById(R.id.message_layout_view);mMessageLayout.setOnClickListener(this);mMineLayout = (RelativeLayout) findViewById(R.id.mine_layout_view);mMineLayout.setOnClickListener(this);
// 再初始化里面的textView 因為點擊的時候要給textView的背景換一張圖片
// 注意這里面用了一個空的TextView，背景是一個圖標，點擊時換的就是這個圖標 mHomeView = (TextView) findViewById(R.id.home_image_view);mPondView = (TextView) findViewById(R.id.fish_image_view);mMessageView = (TextView) findViewById(R.id.message_image_view);mMineView = (TextView) findViewById(R.id.mine_image_view);mHomeView.setBackgroundResource(R.drawable.comui_tab_home_selected);}
// 使用 fragmentTransaction 隱藏fragmentprivate void hideFragment(Fragment fragment, FragmentTransaction ft) {if (fragment != null) {ft.hide(fragment);}}@Overridepublic void onClick(View v) {FragmentTransaction fragmentTransaction = fm.beginTransaction();switch (v.getId()) {case R.id.home_layout_view:// 非必須，可以刪除掉
changeStatusBarColor(R.color.color_fed952);
// 更改背景圖片mHomeView.setBackgroundResource(R.drawable.comui_tab_home_selected);mPondView.setBackgroundResource(R.drawable.comui_tab_pond);mMessageView.setBackgroundResource(R.drawable.comui_tab_message);mMineView.setBackgroundResource(R.drawable.comui_tab_person);// 隱藏其他fragmenthideFragment(mCommonFragmentOne, fragmentTransaction);hideFragment(mMessageFragment, fragmentTransaction);hideFragment(mMineFragment, fragmentTransaction);if (mHomeFragment == null) {
//添加一個新的fragmentmHomeFragment = new HomeFragment();fragmentTransaction.add(R.id.content_layout, mHomeFragment);} else {
// 顯示當前fragmentmCurrent = mHomeFragment;fragmentTransaction.show(mHomeFragment);}break;case R.id.message_layout_view:changeStatusBarColor(R.color.color_e3e3e3);mMessageView.setBackgroundResource(R.drawable.comui_tab_message_selected);mHomeView.setBackgroundResource(R.drawable.comui_tab_home);mPondView.setBackgroundResource(R.drawable.comui_tab_pond);mMineView.setBackgroundResource(R.drawable.comui_tab_person);hideFragment(mCommonFragmentOne, fragmentTransaction);hideFragment(mHomeFragment, fragmentTransaction);hideFragment(mMineFragment, fragmentTransaction);if (mMessageFragment == null) {mMessageFragment = new MessageFragment();fragmentTransaction.add(R.id.content_layout, mMessageFragment);} else {mCurrent = mMessageFragment;fragmentTransaction.show(mMessageFragment);}break;case R.id.mine_layout_view:changeStatusBarColor(R.color.color_00ffffff);mMineView.setBackgroundResource(R.drawable.comui_tab_person_selected);mHomeView.setBackgroundResource(R.drawable.comui_tab_home);mPondView.setBackgroundResource(R.drawable.comui_tab_pond);mMessageView.setBackgroundResource(R.drawable.comui_tab_message);hideFragment(mCommonFragmentOne, fragmentTransaction);hideFragment(mMessageFragment, fragmentTransaction);hideFragment(mHomeFragment, fragmentTransaction);if (mMineFragment == null) {mMineFragment = new MineFragment();fragmentTransaction.add(R.id.content_layout, mMineFragment);} else {mCurrent = mMineFragment;fragmentTransaction.show(mMineFragment);}break;}fragmentTransaction.commit();} }

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