Fragment+ViewPager实现仿微信点击和滑动切换界面

这是在我写的新闻App中实现的界面切换

贴出切换界面的主要代码：

xml代码：

<span style="font-size:14px;">    <android.support.v4.view.ViewPager
        android:id="@+id/viewpager"
        android:layout_width="wrap_content"
        android:layout_height="0dp"
        android:layout_weight="8"
        android:flipInterval="30"
        android:persistentDrawingCache="animation" /> </span>

Activity类代码：

<span style="font-size:14px;">public class MainActivity extends FragmentActivity implements OnClickListener{
	private Button bottom_button_one = null;
	private Button bottom_button_two = null;
	private Button bottom_button_three = null;
	private Button top_break = null;
	private Button top_menu = null;
	private Button menu_home = null;
	private Button menu_refresh = null;
	private Button menu_search = null;
	private LinearLayout bottom_back = null;
	private XinwenFragment xinwen = null;
	private TupianFragment tupian = null;
	private ShipinFragment shipin = null;
	private LayoutInflater inflater = null;
	private View view =null;
	private PopupWindow pop = null;
	//构造适配器
	private List<Fragment> fragments = null;
	//设定适配器
	private ViewPager vp = null;
	private FragmentManager fm = null;
	private FragmentAdapter adapter = null;
	@SuppressLint("InflateParams")
	@SuppressWarnings("deprecation")
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		//让进度条显示在标题栏上
		requestWindowFeature(Window.FEATURE_PROGRESS);
		setContentView(R.layout.activity_main);

		xinwen = new XinwenFragment();
		tupian = new TupianFragment();
		shipin = new ShipinFragment();
		fragments = new ArrayList<Fragment>();
		fragments.add(xinwen);
		fragments.add(tupian);
		fragments.add(shipin);

		fm = this.getSupportFragmentManager();
		adapter = new FragmentAdapter(fm, fragments);
		vp = (ViewPager) findViewById(R.id.viewpager);
		vp.setAdapter(adapter);

		bottom_button_one = (Button) findViewById(R.id.bottom_button_one);
		bottom_button_two = (Button) findViewById(R.id.bottom_button_two);
		bottom_button_three = (Button) findViewById(R.id.bottom_button_three);
		top_break = (Button) findViewById(R.id.top_break);
		top_menu = (Button) findViewById(R.id.top_menu);

		bottom_back = (LinearLayout) findViewById(R.id.bottom_back);
		bottom_button_one.setOnClickListener(this);
		bottom_button_two.setOnClickListener(this);
		bottom_button_three.setOnClickListener(this);
		top_break.setOnClickListener(this);
		top_menu.setOnClickListener(this);

		inflater = LayoutInflater.from(this);
		//引入窗口配置文件
		view = inflater.inflate(R.layout.menu_layout, null);
		menu_home = (Button) view.findViewById(R.id.menu_home);
		menu_refresh = (Button) view.findViewById(R.id.menu_refresh);
		menu_search = (Button) view.findViewById(R.id.menu_search);
		menu_home.setOnClickListener(this);
		menu_refresh.setOnClickListener(this);
		menu_search.setOnClickListener(this);
		//创建PopupWindow对象
		pop= new PopupWindow(view, LayoutParams.WRAP_CONTENT,
				LayoutParams.WRAP_CONTENT, false);
		//需要设置一下此参数，点击外边可消息
		pop.setBackgroundDrawable(new BitmapDrawable());
		//设置点击窗口外边窗口消失
		pop.setFocusable(true);

		//设置默认的Fragment
		setDefaultFragment();
	}
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}
	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		return super.onOptionsItemSelected(item);
	}

	private void setDefaultFragment(){
		//注意：remove会销毁Fragment，hide不销毁只是隐藏，所有add方法要重新new
		vp.setCurrentItem(0,false);     //false表示取消滑动效果，true则有滑动效果
	}
	//弹出带输入框的对话框
	@SuppressLint("InflateParams")
	private void inputTitleDialog(){
		/*
	    Android中得到布局文件对象有两种方式
	    第一种，在Activity所在类中
	          this.getLayoutInflater().inflater(R.layout.布局文件名,null);
	    第二种，在非Activity所在类中
	          Context.getSystemService(Context.LAYOUT_INFLATER_SERVICE).inflater(R.layout.布局文件名,null);
		 */
		View view = this.getLayoutInflater().inflate(R.layout.dialog_layout, null);
		final EditText text = (EditText) view.findViewById(R.id.edit_search);
		AlertDialog.Builder builder = new AlertDialog.Builder(this);
		builder.setTitle("对话框标题")
					.setIcon(R.drawable.ic_launcher)
					.setView(view)
					.setNegativeButton("取消", null)
					.setPositiveButton("确定", new DialogInterface.OnClickListener() {
						@Override
						public void onClick(DialogInterface dialog, int which) {
							String str = text.getText().toString();
							if(!str.equals("")){
								if(str.indexOf("http://")==0){
									xinwen.wv.loadUrl(str);
								}else{
									xinwen.wv.loadUrl("http://www.baidu.com/s?wd="+str);
								}
							}
						}
					});
		builder.show();
	}
	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.bottom_button_one:
			bottom_back.setBackgroundResource(R.drawable.bottom_one);
			vp.setCurrentItem(0, false);
			break;
		case R.id.bottom_button_two:
			bottom_back.setBackgroundResource(R.drawable.bottom_two);
			vp.setCurrentItem(1, false);
			break;
		case R.id.bottom_button_three:
			bottom_back.setBackgroundResource(R.drawable.bottom_three);
			vp.setCurrentItem(2, false);
			break;
		case R.id.top_break:
			if(xinwen!=null)
				xinwen.wv.goBack();   //后退
			break;
		case R.id.top_menu:
			if(pop.isShowing()){
				//隐藏窗口，如果设置了点击窗口外小时即不需要此方法隐藏
				pop.dismiss();
			}else{
				//显示窗口
				pop.showAsDropDown(v);
			}
		//	openOptionsMenu();   //显示menu菜单项
			break;
		case R.id.menu_home:
			pop.dismiss();
			xinwen.wv.loadUrl("http://news.sina.com.cn");
			break;
		case R.id.menu_refresh:
			pop.dismiss();
			xinwen.wv.reload();      //刷新
			break;
		case R.id.menu_search:
			pop.dismiss();
			inputTitleDialog();
			break;
		default:
			break;
		}
		/*
		mWebView.goBack();   //后退
		mWebView.goForward();//前进
		mWebView.reload();  //刷新
		 */
	}
}
</span>

adapter代码：

<span style="font-size:14px;">public class FragmentAdapter extends FragmentPagerAdapter{
	private List<Fragment> mFragments;
	public Fragment currentFragment;
	public FragmentAdapter(FragmentManager fm, List<Fragment> fragments) {
		super(fm);
		mFragments = fragments;
	}
	@Override
	public Fragment getItem(int position) {
		return mFragments.get(position);
	}
	@Override
	public int getCount() {
		return mFragments.size();
	}
	//重载FragmentPagerAdapter.setPrimaryItem方法
	@Override
	public void setPrimaryItem(ViewGroup container, int position, Object object){
		currentFragment = (Fragment)object;
		super.setPrimaryItem(container, position, object);
	}
}</span>

setCurrentItem()方法在这里要说一下，设置为false取消滑动效果，true显示滑动效果，准确来说是通过控制滑动时间来实现，当设置滑动时间为0时，滑动效果就没有了。

我要实现点击底部按钮实现没有滑动效果的切换，刚开始以为是其它问题，没有从setCurrentItem()入手，在哪里啥弄了半天。

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