MainActivity.java

package com.wangbb.naruto.app.activity;

import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.MenuItemCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.widget.ShareActionProvider;
import android.support.v7.widget.Toolbar;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;

import com.wangbb.naruto.R;
import com.wangbb.naruto.app.fragment.MainDrawerMenuFragment;
import com.wangbb.naruto.app.fragment.MainHomeFragment;
import com.wangbb.naruto.app.fragment.MainSettingFragment;
import com.wangbb.naruto.app.fragment.MainTempFragment;

public class MainActivity extends BaseFragmentActivity {

    public Handler handler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case SWITCH_FRAGMENT:
                    attachFragment(String.valueOf(msg.obj));
                    break;
            }
        }
    };

    public static final int SWITCH_FRAGMENT = 0x1024;
    public static final String HOME = "home";
    public static final String TEMP = "temp";
    public static final String SETTING = "setting";

    private Toolbar toolbar;
    private DrawerLayout drawerLayout;
    private ActionBarDrawerToggle toggle;

    private MainDrawerMenuFragment menuFragment;
    private MainHomeFragment homeFragment;
    private MainTempFragment tempFragment;
    private MainSettingFragment settingFragment;

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

        initView();
        setListener();
        initMenuView();
        attachFragment(HOME);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (!(getVisibleFragment() instanceof MainHomeFragment)){
            attachFragment(HOME);
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }

    private void initMenuView() {
        if (menuFragment == null) {
            FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
            menuFragment = new MainDrawerMenuFragment();
            ft.replace(R.id.drawerlayout_menu, menuFragment);
            ft.commit();
        }
    }

    private void attachFragment(String tabId) {
        FragmentTransaction ft = getSupportFragmentManager().beginTransaction();

        if (homeFragment != null) {
            ft.hide(homeFragment);
        }
        if (tempFragment != null) {
            ft.hide(tempFragment);
        }
        if (settingFragment != null) {
            ft.hide(settingFragment);
        }

        switchFragment(ft, tabId);
        ft.commit();
    }

    private void switchFragment(FragmentTransaction ft, String tab) {
        if (tab.equals(HOME)) {
            if (homeFragment == null) {
                homeFragment = new MainHomeFragment();
                ft.add(R.id.drawerlayout_content, homeFragment);
            } else {
                ft.show(homeFragment);
            }
        } else if (tab.equals(TEMP)) {
            if (tempFragment == null) {
                tempFragment = new MainTempFragment();
                ft.add(R.id.drawerlayout_content, tempFragment);
            } else {
                ft.show(tempFragment);
            }
        } else if (tab.equals(SETTING)) {
            if (settingFragment == null) {
                settingFragment = new MainSettingFragment();
                ft.add(R.id.drawerlayout_content, settingFragment);
            } else {
                ft.show(settingFragment);
            }
        }
    }

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

        ShareActionProvider shareProvider = (ShareActionProvider) MenuItemCompat
                .getActionProvider(menu.findItem(R.id.share));
        shareProvider
                .setShareHistoryFileName(ShareActionProvider.DEFAULT_SHARE_HISTORY_FILE_NAME);
        shareProvider.setShareIntent(getShareIntent());
        return true;
    }

    private void initView() {
        toolbar = (Toolbar) findViewById(R.id.toolbar);
        setToolbar();
        setSupportActionBar(toolbar);
        getSupportActionBar().setHomeButtonEnabled(true); //���÷��ؼ�����
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);

        drawerLayout = (DrawerLayout) findViewById(R.id.drawerlayout);
        // set a custom shadow that overlays the main content when the drawer opens
//        drawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
        toggle = new ActionBarDrawerToggle(this, drawerLayout, R.string.drawerlayout_open, R.string.drawerlayout_close) {
            @Override
            public void onDrawerClosed(View drawerView) {
                toolbar.setTitle(R.string.drawerlayout_close);
            }

            @Override
            public void onDrawerOpened(View drawerView) {
                toolbar.setTitle(R.string.drawerlayout_open);

//                toolbar.getMenu().removeItem(R.id.share);
            }
        };
        toggle.syncState();
        drawerLayout.setDrawerListener(toggle);
    }

    private void setListener() {
        toolbar.setOnMenuItemClickListener(new Toolbar.OnMenuItemClickListener() {
            @Override
            public boolean onMenuItemClick(MenuItem menuItem) {
                switch (menuItem.getItemId()) {
                    case R.id.about:
                        startActivity(new Intent(MainActivity.this, AboutActivity.class));
                        break;
                }
                return false;
            }
        });

        toolbar.setNavigationOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (drawerLayout.isDrawerOpen(Gravity.START))
                    drawerLayout.closeDrawer(Gravity.START);
                else
                    drawerLayout.openDrawer(Gravity.START);
            }
        });
    }

    public DrawerLayout getDrawerLayout() {
        return drawerLayout;
    }

    private Intent getShareIntent() {
        Intent intent = new Intent(Intent.ACTION_SEND);
        intent.putExtra(Intent.EXTRA_TEXT, "����Naruto������Naruto");
        intent.setType("text/plain");
        Intent.createChooser(intent, "Share");
        return intent;
    }

    private void setToolbar() {
//        toolbar.setNavigationIcon(R.drawable.ic_launcher);
        toolbar.setTitle("Naruto");
    }
}