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在项目开发中，市场上大大小小的app很多就是采用底部几个按钮的导航栏。其实有很多种方式去实现。这里是采用FrameLayout+RadioGroup来实现的。
1.主界面的xml文件`
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<FrameLayout
android:id="@+id/fragment_main"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="@color/color_gay_guide" />
<RadioGroup
android:id="@+id/radio_main"
android:layout_width="match_parent"
android:layout_height="54dp"
android:layout_marginTop="5sp"
android:orientation="horizontal">
<RadioButton
android:id="@+id/rb_home"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1"
android:button="@null"
android:drawableTop="@drawable/tab_home_deal"
android:gravity="center"
android:text="11"
android:textColor="@drawable/tab_home_deal_text" />
<RadioButton
android:id="@+id/rb_wealth"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1"
android:button="@null"
android:drawableTop="@drawable/tab_wealth_deal"
android:gravity="center"
android:text="22"
android:textColor="@drawable/tab_home_deal_text" />
<RadioButton
android:id="@+id/rb_find"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1"
android:button="@null"
android:drawableTop="@drawable/tab_find_deal"
android:gravity="center"
android:text="33"
android:textColor="@drawable/tab_home_deal_text" />
<RadioButton
android:id="@+id/rb_mine"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1"
android:button="@null"
android:drawableTop="@drawable/tab_mine_deal"
android:gravity="center"
android:text="44"
android:textColor="@drawable/tab_home_deal_text" />
</RadioGroup>
</LinearLayout>
</LinearLayout>
主要是RadioButton的点击切换，这个是不能滑动界面。
图片的切换在drawable中配置：
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@mipmap/pic_home_page_one" android:state_checked="true"/>
<item android:drawable="@mipmap/pic_home_page_tow" android:state_checked="false"/>
</selector>
其他的3个依次，注意的是state_checked。
字体的颜色的改变：
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:color="@color/color_main" android:state_checked="true"/>
<item android:color="@color/color_home_fragment_text" android:state_checked="false"/>
</selector>
主界面的代码
public class HomeActivity extends BaseActivity<HomePresenter> implements HomeView,View.OnClickListener {
private HomeFragment homeFragment;
private WealthFragment wealthFragment;
private FindFragment findFragment;
private MineFragment mineFragment;
private RadioButton mRadioButtonHome;
private FrameLayout mFrameLayout;
private RadioGroup mRadioGroup;
private FragmentTransaction transaction;
@Override
protected HomePresenter createPresenter() {
return new HomePresenter(this);
}
@Override
protected int getLayoutId() {
return R.layout.activity_home;
}
@Override
public void onClick(View v) {
}
@Override
public void initView() {
super.initView();
mFrameLayout = (FrameLayout) findViewById(R.id.fragment_main);
mRadioGroup = (RadioGroup) findViewById(R.id.radio_main);
mRadioButtonHome = (RadioButton) findViewById(R.id.rb_home);
//默认首页选中
FragmentManager supportFragmentManager = getSupportFragmentManager();
transaction = supportFragmentManager.beginTransaction();
if (homeFragment == null){
homeFragment=new HomeFragment();
transaction.add(R.id.fragment_main,homeFragment);
}
transaction.show(homeFragment);
transaction.commit();
//初始选中的状态
mRadioButtonHome.setChecked(true);
}
@Override
public void setListener() {
super.setListener();
}
@Override
public void initData() {
super.initData();
mRadioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
FragmentManager supportFragmentManager = getSupportFragmentManager();
transaction = supportFragmentManager.beginTransaction();
hideFragment();
switch (checkedId){
case R.id.rb_home:
if (homeFragment == null){
homeFragment=new HomeFragment();
transaction.add(R.id.fragment_main,homeFragment);
}
transaction.show(homeFragment);
break;
case R.id.rb_wealth:
if (wealthFragment == null){
wealthFragment = new WealthFragment();
transaction.add(R.id.fragment_main,wealthFragment);
}
transaction.show(wealthFragment);
break;
case R.id.rb_find:
if (findFragment == null){
findFragment = new FindFragment();
transaction.add(R.id.fragment_main,findFragment);
}
transaction.show(findFragment);
break;
case R.id.rb_mine:
if (mineFragment == null){
mineFragment = new MineFragment();
transaction.add(R.id.fragment_main,mineFragment);
}
transaction.show(mineFragment);
break;
}
transaction.commit();
}
});
}
private void hideFragment() {
if (homeFragment!=null){
transaction.hide(homeFragment);
}
if (wealthFragment!=null){
transaction.hide(wealthFragment);
}
if (findFragment!=null){
transaction.hide(findFragment);
}
if (mineFragment!=null){
transaction.hide(mineFragment);
}
}
}
fragment中就不用去描述了。
生活的点点滴滴虽小，积累就成多，没有一步登天，只有一步一步的走下去。虽然简单但是还是去做，坚定自己。
坚持写，做笔记。