Android中实现底部Tabhost【附源码】

这个主要是实现底部的tabhost方式，tabhost就是有几个标签滑动的一个控件。activity继承TabActivity
其他不多说了，直接上代码

public class main extends TabActivity {        private TabHost tabHost;        private TabWidget tabWidget;        Field mBottomLeftStrip;        Field mBottomRightStrip;           @Override       public void onCreate(Bundle savedInstanceState) {            super.onCreate(savedInstanceState);            setContentView(R.layout.main);               makeTab();        }           public void makeTab() {            if (this.tabHost == null) {                tabHost = getTabHost();                tabWidget = getTabWidget();                tabHost.setup();                tabHost.bringToFront();                   TabSpec firsttab = tabHost.newTabSpec("firsttab");                TabSpec sencondtab = tabHost.newTabSpec("sencondtab");                TabSpec thirdtab = tabHost.newTabSpec("thirdtab");                   firsttab.setIndicator("first",                        getResources().getDrawable(R.drawable.first)).setContent(                        new Intent(this, first.class));                sencondtab.setIndicator("second",                        getResources().getDrawable(R.drawable.second)).setContent(                        new Intent(this, second.class));                thirdtab.setIndicator("third",                        getResources().getDrawable(R.drawable.third)).setContent(                        new Intent(this, third.class));                   tabHost.addTab(firsttab);                tabHost.addTab(sencondtab);                tabHost.addTab(thirdtab);                   if (Integer.valueOf(Build.VERSION.SDK) <= 7) {                    try {                        mBottomLeftStrip = tabWidget.getClass().getDeclaredField(                                "mBottomLeftStrip");                        mBottomRightStrip = tabWidget.getClass().getDeclaredField(                                "mBottomRightStrip");                        if (!mBottomLeftStrip.isAccessible()) {                            mBottomLeftStrip.setAccessible(true);                        }                        if (!mBottomRightStrip.isAccessible()) {                            mBottomRightStrip.setAccessible(true);                        }                        mBottomLeftStrip.set(tabWidget,                                getResources().getDrawable(R.drawable.linee));                        mBottomRightStrip.set(tabWidget, getResources()                                .getDrawable(R.drawable.linee));                       } catch (Exception e) {                        e.printStackTrace();                    }                } else {                    try {                        mBottomLeftStrip = tabWidget.getClass().getDeclaredField(                                "mLeftStrip");                        mBottomRightStrip = tabWidget.getClass().getDeclaredField(                                "mRightStrip");                        if (!mBottomLeftStrip.isAccessible()) {                            mBottomLeftStrip.setAccessible(true);                        }                        if (!mBottomRightStrip.isAccessible()) {                            mBottomRightStrip.setAccessible(true);                        }                        mBottomLeftStrip.set(tabWidget,                                getResources().getDrawable(R.drawable.linee));                        mBottomRightStrip.set(tabWidget, getResources()                                .getDrawable(R.drawable.linee));                    } catch (Exception e) {                        e.printStackTrace();                    }                }                   for (int i = 0; i < tabWidget.getChildCount(); i++) {                       View view = tabWidget.getChildAt(i);                    if (tabHost.getCurrentTab() == i) {                        view.setBackgroundDrawable(getResources().getDrawable(                                R.drawable.focus));                    } else {                        view.setBackgroundDrawable(getResources().getDrawable(                                R.drawable.unfocus));                    }                }                   tabHost.setOnTabChangedListener(new OnTabChangeListener() {                       @Override                   public void onTabChanged(String tabId) {                        for (int i = 0; i < tabWidget.getChildCount(); i++) {                            View view = tabWidget.getChildAt(i);                            Toast.makeText(main.this, tabId, Toast.LENGTH_SHORT).show();                            if (tabHost.getCurrentTab() == i) {                                view.setBackgroundDrawable(getResources()                                        .getDrawable(R.drawable.focus));                            } else {                                view.setBackgroundDrawable(getResources()                                        .getDrawable(R.drawable.unfocus));                            }                        }                    }                });            }        }    }