第二次迭代感想

这次我认领的任务是主界面功能的实现，这个项目相对前一个认领项目稍稍有些难度，所以花的时间和精力业更多了，而且有些地方跟本组同学发生了思想上擦出了火花，但是最后我们讨论并解决了。

这是这次我任务的java代码：

public class MainActivity extends ActionBarActivity implements View.OnClickListener{

private TextView txt_waimai;    private TextView txt_find;    private TextView txt_order;    private FrameLayout ly_content;

private HomeFragment homeFragment;    private FindFragment findFragment;    private OrderFragment orderFragment;    private android.app.FragmentManager fManager ;

private Toolbar toolbar;    private DrawerLayout mDrawerLayout;    private ActionBarDrawerToggle mDrawerToggle;    private ListView lvLeftMenu;    private String[] lvs = {"账户信息", "我的余额", "我的收藏", "服务中心", "系统设置"};//可以放入String中，在拿取出来    private ArrayAdapter arrayAdapter;

private ActionBar actionBar ;

@Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);

fManager = getFragmentManager();        bindViews();        txt_waimai.performClick();   //模拟一次点击，既进去后选择第一项

findViews(); //获取控件        toolbar.setTitle("Foodie");//设置Toolbar标题        toolbar.setTitleTextColor(Color.parseColor("#FFFFFF")); //设置标题颜色//        actionBar= getActionBar();        setSupportActionBar(toolbar) ;//支持ActionBar

//创建返回键，并实现打开关/闭监听        mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, toolbar,                R.string.open_drawer, R.string.close_drawer) {            @Override            public void onDrawerOpened(View drawerView) {                super.onDrawerOpened(drawerView);            }            @Override            public void onDrawerClosed(View drawerView) {                super.onDrawerClosed(drawerView);            }        };        mDrawerToggle.syncState();        mDrawerLayout.setDrawerListener(mDrawerToggle);        //设置菜单列表,写一个listView布局将其优化        arrayAdapter = new ArrayAdapter(this, android.R.layout.simple_list_item_1, lvs);        lvLeftMenu.setAdapter(arrayAdapter);

lvLeftMenu.setOnItemClickListener(new DrawerItemClickListener());

//        setStatusBar();//设置沉浸式状态栏，5.0.1系统有点Bug

toolbar.setOnMenuItemClickListener(new Toolbar.OnMenuItemClickListener() {            @Override            public boolean onMenuItemClick(MenuItem item) {                switch (item.getItemId()){                    case R.id.action_search:                        startActivity(new Intent(getApplicationContext(), Searchctivity.class));                        break;                    case R.id.toolBar_btn_login:                        startActivity(new Intent(getApplicationContext(),LoginActivity.class));                        break;                }                return false;            }        });

}

//将ActionBar添加进来    @Override    public boolean onCreateOptionsMenu(Menu menu) {        MenuInflater inflater = new MenuInflater(this) ;        inflater.inflate(R.menu.activity_main,menu);        return super.onCreateOptionsMenu(menu);    }

@Override    public boolean onOptionsItemSelected(MenuItem item) {        if (item.isCheckable()){            item.setChecked(true);        }        return super.onOptionsItemSelected(item);    }

//UI组件初始化与事件绑定    private void bindViews() {        txt_waimai = (TextView) findViewById(R.id.txt_waimai);        txt_find = (TextView) findViewById(R.id.txt_find);        txt_order = (TextView) findViewById(R.id.txt_order);

ly_content = (FrameLayout) findViewById(R.id.ly_content);

txt_waimai.setOnClickListener(this);        txt_find.setOnClickListener(this);        txt_order.setOnClickListener(this);    }

//重置所有文本的选中状态    private void setSelected(){        txt_waimai.setSelected(false);        txt_find.setSelected(false);        txt_order.setSelected(false);    }

//隐藏所有Fragment    private void hideAllFragment(FragmentTransaction fragmentTransaction){        if(homeFragment != null)fragmentTransaction.hide(homeFragment);        if(findFragment != null)fragmentTransaction.hide(findFragment);        if(orderFragment != null)fragmentTransaction.hide(orderFragment);    }

@Override    public void onClick(View v) {        FragmentTransaction fTransaction = fManager.beginTransaction();        hideAllFragment(fTransaction);        switch (v.getId()){            case R.id.txt_waimai:                setSelected();                txt_waimai.setSelected(true);                if(homeFragment == null){                    homeFragment = new HomeFragment();                    fTransaction.add(R.id.ly_content,homeFragment);                }else{                    fTransaction.show(homeFragment);                }                break;            case R.id.txt_find:                setSelected();                txt_find.setSelected(true);                if(findFragment == null){                    findFragment = new FindFragment();                    fTransaction.add(R.id.ly_content,findFragment);                }else{                    fTransaction.show(findFragment);                }                break;            case R.id.txt_order:                setSelected();                txt_order.setSelected(true);                if(orderFragment == null){                    orderFragment = new OrderFragment();                    fTransaction.add(R.id.ly_content,orderFragment);                }else{                    fTransaction.show(orderFragment);                }                break;        }        fTransaction.commit();    }

/**     * ListView上的Item点击事件     *     */    private class DrawerItemClickListener implements ListView.OnItemClickListener {        @Override        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {            selectItem(position);        }    }

/**     * 切换Item点击显示的页面     *     * @param position     */    private void selectItem(int position) {        switch (position){            case 0:                startActivity(new Intent(this,AccountActivity.class));                break;            case 1:

break;            case 2:

break;            case 3:

break;            case 4:                startActivity(new Intent(this,SettingActivity.class));                break;            default:                break;        }    }

/**     * 获取控件     */    private void findViews() {        toolbar = (Toolbar) findViewById(R.id.tl_custom);        mDrawerLayout = (DrawerLayout) findViewById(R.id.dl_left);        lvLeftMenu = (ListView) findViewById(R.id.lv_left_menu);    }

/**     * 设置沉浸式状态栏，需4.4版本以上     *///    protected void setStatusBar() {//        StatusBarUtil.setColor(this, getResources().getColor(R.color.colorPrimary));//        StatusBarUtil.setColorForDrawerLayout(this, (DrawerLayout) findViewById(R.id.dl_left), getResources()//                .getColor(R.color.colorPrimary));//    }

/**     * 双击退出，根据时间来判断     */    long waitTime = 2000;    long touchTime = 0;    @Override    public boolean onKeyDown(int keyCode, KeyEvent event) {        if(event.getAction() == KeyEvent.ACTION_DOWN && KeyEvent.KEYCODE_BACK == keyCode) {            long currentTime = System.currentTimeMillis();            if((currentTime-touchTime)>=waitTime) {                //让Toast的显示时间和等待时间相同                Toast.makeText(this, "再按一次退出", Toast.LENGTH_SHORT).show();                touchTime = currentTime;            }else {                System.exit(0);//会跳屏，关闭时会出现黑屏，需要优化，不能用finish()            }            return true;        }        return super.onKeyDown(keyCode, event);    }}