fragment的模板

public class MainActivity extends FragmentActivity implements View.OnClickListener{


    private RelativeLayout mRlTab1,mRlTab2,mRlTab3,mRlTab4;
    private ImageView mIvTab1,mIvTab2,mIvTab3,mIvTab4;
    private TextView mTvTab1,mTvTab2,mTvTab3,mTvTab4;


    private FragmentManager manager;
    private Fragment IndexFragment,MagFragment,NewsFragment,MeFragment;
    
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);


        initView();
        initEvent();


        setTabSelect(0);
	}


    private void initView(){
        mRlTab1=(RelativeLayout)findViewById(R.id.rl_tab1);
        mRlTab2=(RelativeLayout)findViewById(R.id.rl_tab2);
        mRlTab3=(RelativeLayout)findViewById(R.id.rl_tab3);
        mRlTab4=(RelativeLayout)findViewById(R.id.rl_tab4);


        mTvTab1=(TextView)findViewById(R.id.tv_tab1);
        mTvTab2=(TextView)findViewById(R.id.tv_tab2);
        mTvTab3=(TextView)findViewById(R.id.tv_tab3);
        mTvTab4=(TextView)findViewById(R.id.tv_tab4);


        mIvTab1=(ImageView)findViewById(R.id.iv_tab1);
        mIvTab2=(ImageView)findViewById(R.id.iv_tab2);
        mIvTab3=(ImageView)findViewById(R.id.iv_tab3);
        mIvTab4=(ImageView)findViewById(R.id.iv_tab4);


    }


    private void initEvent(){
        mRlTab1.setOnClickListener(this);
        mRlTab2.setOnClickListener(this);
        mRlTab3.setOnClickListener(this);
        mRlTab4.setOnClickListener(this);
    }


    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.rl_tab1:
                setTabSelect(0);
                break;
            case R.id.rl_tab2:
                setTabSelect(1);


                break;
            case R.id.rl_tab3:
                setTabSelect(2);


                break;
            case R.id.rl_tab4:
                setTabSelect(3);
                break;
            default:
                break;
        }
    }




    public void setTabSelect(int i) {
        FragmentManager manager=getSupportFragmentManager();
        FragmentTransaction transaction=manager.beginTransaction();


        resetTab();
        switch (i) {
            case 0:
                IndexFragment=manager.findFragmentByTag("TAG1");
                hideTab(transaction);
                if (IndexFragment == null){
                    IndexFragment = new IndexTabFragment();
                    transaction.add(R.id.content, IndexFragment,"TAG1");
                } else{
                    transaction.show(IndexFragment);
                }
                Log.i("MainActivity","IndexFragment:"+IndexFragment.toString());
                mIvTab1.setImageResource(R.drawable.index_s);
                mTvTab1.setTextColor(getResources().getColor(R.color.tab_text_press));
                mRlTab1.setBackgroundColor(getResources().getColor(R.color.tab_select_back));
                break;
            case 1:
                MagFragment=manager.findFragmentByTag("TAG2");
                hideTab(transaction);
                if (MagFragment == null){
                    MagFragment = new MagTabFragment();
                    transaction.add(R.id.content, MagFragment,"TAG2");
                } else{
                    transaction.show(MagFragment);
                }
                Log.i("MainActivity","MagFragment:"+MagFragment.toString());
                mIvTab2.setImageResource(R.drawable.magzine_s);
                mTvTab2.setTextColor(getResources().getColor(R.color.tab_text_press));
                mRlTab2.setBackgroundColor(getResources().getColor(R.color.tab_select_back));
                break;
            case 2:
                NewsFragment=manager.findFragmentByTag("TAG3");
                hideTab(transaction);
                if (NewsFragment == null){
                    NewsFragment = new NewsTabFragment();
                    transaction.add(R.id.content, NewsFragment,"TAG3");
                } else{
                    transaction.show(NewsFragment);
                }
                Log.i("MainActivity","NewsFragment:"+NewsFragment.toString());
                mIvTab3.setImageResource(R.drawable.picture_s);
                mTvTab3.setTextColor(getResources().getColor(R.color.tab_text_press));
                mRlTab3.setBackgroundColor(getResources().getColor(R.color.tab_select_back));
                break;
            case 3:
                MeFragment=manager.findFragmentByTag("TAG4");
                hideTab(transaction);
                if (MeFragment == null){
                    MeFragment = new MeTabFragment();
                    transaction.add(R.id.content, MeFragment,"TAG4");
                } else{
                    transaction.show(MeFragment);
                }
                Log.i("MainActivity","MeFragment:"+MeFragment.toString());
                mIvTab4.setImageResource(R.drawable.me_s);
                mTvTab4.setTextColor(getResources().getColor(R.color.tab_text_press));
                mRlTab4.setBackgroundColor(getResources().getColor(R.color.tab_select_back));
                break;
            default:


                break;
        }
        transaction.commit();


    }


    private void resetTab(){
        mRlTab1.setBackgroundColor(getResources().getColor(R.color.tab_back));
        mRlTab2.setBackgroundColor(getResources().getColor(R.color.tab_back));
        mRlTab3.setBackgroundColor(getResources().getColor(R.color.tab_back));
        mRlTab4.setBackgroundColor(getResources().getColor(R.color.tab_back));


        mIvTab1.setImageResource(R.drawable.index);
        mIvTab2.setImageResource(R.drawable.magzine);
        mIvTab3.setImageResource(R.drawable.picture);
        mIvTab4.setImageResource(R.drawable.me);


        mTvTab1.setTextColor(getResources().getColor(R.color.tab_text));
        mTvTab2.setTextColor(getResources().getColor(R.color.tab_text));
        mTvTab3.setTextColor(getResources().getColor(R.color.tab_text));
        mTvTab4.setTextColor(getResources().getColor(R.color.tab_text));
    }


    private void hideTab(FragmentTransaction transaction){
        if (IndexFragment != null)
        {
            transaction.hide(IndexFragment);
        }
        if (MagFragment != null)
        {
            transaction.hide(MagFragment);
        }
        if (NewsFragment != null)
        {
            transaction.hide(NewsFragment);
        }
        if (MeFragment != null)
        {
            transaction.hide(MeFragment);
        }
    }


    @Override
    protected void onSaveInstanceState(Bundle outState) {
//        super.onSaveInstanceState(outState);
    }


    @Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}


}

/**
 * 整个程序最底层的框架Activity，所有的Fragment都是依赖于此Activity而存在的
 * 
 * @author dell
 * 
 */
public class Main_FA extends FragmentActivity implements OnClickListener, IBtnCallListener {

	//新版本长度只有3个
	private ImageView[] bt_menu = new ImageView[3];
	// 界面底部的菜单按钮id
	private int[] bt_menu_id = { R.id.iv_menu_0,R.id.iv_menu_2,R.id.iv_menu_4 };
	// 界面底部的选中菜单按钮资源
	private int[] select_on = { R.drawable.guide_home_on,R.drawable.guide_discover_on,R.drawable.guide_account_on };
	// 界面底部的未选中菜单按钮资源
	private int[] select_off = { R.drawable.bt_menu_0_select,R.drawable.bt_menu_2_select,R.drawable.bt_menu_4_select };

	/** 主界面 */
	private Home_New_F home_F;
	/** 发现界面 */
	/** 个人中心界面 */
	private User_F user_F;
	//全局变量 存放用户id
	private CacheFunction cacheFunction;//操作缓存
	private String uid;
	private String utype;

	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main_fa);
		MyApplication.getInstance().addActivity(this);
		cacheFunction = new CacheFunction(this);		
		initView();
		//软件自动检测更新
		UpdateApp update = new UpdateApp(this);
		update.update();
	}


	// 初始化组件
	private void initView() {
		// 找到底部菜单的按钮并设置监听
		for (int i = 0; i < bt_menu.length; i++) {
			bt_menu[i] = (ImageView) findViewById(bt_menu_id[i]);
			bt_menu[i].setOnClickListener(this);
		}

		// 初始化默认显示的界面
		if (home_F == null) {
			home_F = new Home_New_F();
			addFragment(home_F);
			showFragment(home_F);
		} else {
			showFragment(home_F);
		}
		// 设置默认首页为点击时的图片
		bt_menu[0].setImageResource(select_on[0]);

	}

	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.iv_menu_0:
			// 主界面
			if (home_F == null) {
				home_F = new Home_New_F();
				// 判断当前界面是否隐藏，如果隐藏就进行添加显示，false表示显示，true表示当前界面隐藏
				addFragment(home_F);
				showFragment(home_F);
			} else {
				if (home_F.isHidden()) {
					showFragment(home_F);
				}
			}

			break;
		case R.id.iv_menu_2:
			// 发现界面
			if (discover_F == null) {
				discover_F = new Discover_F();
				// 判断当前界面是否隐藏，如果隐藏就进行添加显示，false表示显示，true表示当前界面隐藏
				if (!discover_F.isHidden()) {
					addFragment(discover_F);
					showFragment(discover_F);
				}
			} else {
				if (discover_F.isHidden()) {
					showFragment(discover_F);
				}
			}

			break;
		}

		// 设置按钮的选中和未选中资源   
		// 这个地方相当的不好，有错误  
		for (int i = 0; i < bt_menu.length; i++) {
			bt_menu[i].setImageResource(select_off[i]);
			if (v.getId() == bt_menu_id[i]) {
				bt_menu[i].setImageResource(select_on[i]);
			}
		}
	}

	/** 添加Fragment **/
	public void addFragment(Fragment fragment) {
		FragmentTransaction ft = this.getSupportFragmentManager().beginTransaction();
		ft.add(R.id.show_layout, fragment);
		ft.commit();
	}

	/** 删除Fragment **/
	public void removeFragment(Fragment fragment) {
		FragmentTransaction ft = this.getSupportFragmentManager().beginTransaction();
		ft.remove(fragment);
		ft.commit();
	}

	/** 显示Fragment **/
	public void showFragment(Fragment fragment) {
		FragmentTransaction ft = this.getSupportFragmentManager().beginTransaction();
		// 设置Fragment的切换动画
		ft.setCustomAnimations(R.anim.cu_push_right_in, R.anim.cu_push_left_out);

		// 判断页面是否已经创建，如果已经创建，那么就隐藏掉
		if (home_F != null) {
			ft.hide(home_F);
		}
		if (discover_F != null) {
			ft.hide(discover_F);
		}

		ft.show(fragment);
		ft.commitAllowingStateLoss();

	}

	/** 返回按钮的监听 */
	@Override
	public void onBackPressed() {
		Toast.makeText(this, "点击返回按钮", Toast.LENGTH_SHORT).show();

		super.onBackPressed();
	}

	/** Fragment的回调函数 */
	@SuppressWarnings("unused")
	private IBtnCallListener btnCallListener;

	@Override
	public void onAttachFragment(Fragment fragment) {
		try {
			btnCallListener = (IBtnCallListener) fragment;
		} catch (Exception e) {
		}

		super.onAttachFragment(fragment);
	}

	/**
	 * 响应从Fragment中传过来的消息
	 */
	@Override
	public void transferMsg() {
		if (home_F == null) {
			home_F = new Home_New_F();
			addFragment(home_F);
			showFragment(home_F);
		} else {
			showFragment(home_F);
		}
	}

	
	@Override
	protected void onDestroy() {
		
		MyApplication.getInstance().exit();
		super.onDestroy();
	}


	
	/****************退出分享的功能*********************/
	private boolean okToExit =true;
	@Override
	public boolean onKeyDown(int keyCode, KeyEvent event) {

		if(keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == KeyEvent.ACTION_DOWN){
			if(okToExit){
				showback();
			}
		}
		
		return super.onKeyDown(keyCode, event);
	}
	
	private void showback(){
		AlertDialog.Builder builder = new Builder(Main_FA.this);
		builder.setMessage("");
		builder.setTitle("");
		builder.setNegativeButton("取消",
				new DialogInterface.OnClickListener() {
					@Override
					public void onClick(DialogInterface dialog, int which) {
						dialog.dismiss();
						finish();						
					}
				});
		builder.setPositiveButton("确定",
				new DialogInterface.OnClickListener() {

					@Override
					public void onClick(DialogInterface dialog, int which) {
						shareApp();
					}
				});
		builder.create().show();	
	}


	protected void shareApp() {
		// TODO Auto-generated method stub
		String title = "分享";
		String text = ""
		Intent intent = new Intent(Intent.ACTION_SEND);
		intent.setType("text/plain");
		intent.putExtra(Intent.EXTRA_SUBJECT, title);
		intent.putExtra(Intent.EXTRA_TEXT, text);
		intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
		startActivity(Intent.createChooser(intent, title));
	}


}