fragmenttab使用流程

第一步：写main xml文件

<android.support.v4.app.FragmentTabHost
    android:id="@android:id/tabhost"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <TabWidget
            android:id="@android:id/tabs"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:layout_gravity="bottom"/>

        <FrameLayout
            android:id="@android:id/tabcontent"
            android:layout_width="match_parent"
            android:layout_height="0dp"
            android:layout_weight="1"/>

    </LinearLayout>

</android.support.v4.app.FragmentTabHost>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TextView
        android:id="@+id/tab_tv_text"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
        android:textSize="40sp"
        tools:text="Test"/>
</LinearLayout>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
    <ImageView
        android:id="@+id/tab_iv_image"
        android:padding="12dp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:contentDescription="@null"
        tools:src="@drawable/tab_assistant"/>

</LinearLayout>

 

 

第二步：在mainactivity中设置图片和文字资源

// 图片
    @DrawableRes
    private int mImages[] = {
            R.drawable.tab_counter,
            R.drawable.tab_assistant,
            R.drawable.tab_contest,
            R.drawable.tab_center
    };

    // 标题
    private String mFragmentTags[] = {
            "counter",
            "assistant",
            "contest",
            "center"
    };

private View getImageView(int index) {
        @SuppressLint("InflateParams")
        View view = getLayoutInflater().inflate(R.layout.view_tab_indicator, null);
        ImageView imageView = (ImageView) view.findViewById(R.id.tab_iv_image);
        imageView.setImageResource(mImages[index]);
        return view;
    }

tab选中效果

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/tab_assistant_light" android:state_selected="true"/>
    <item android:drawable="@drawable/tab_assistant_gray" android:state_selected="false"/>
</selector>

第三步：MainActivity中实例化控件，这里使用了一个插件，叫做butterknife。极大省略了findviewbyid 这样的重复性代码。这样就可以使用mtabhost了

 @Bind(android.R.id.tabhost) FragmentTabHost mTabHost;

 ButterKnife.bind(this)

第四步：写 oncreate方法

先设置fragment manager

然后给tab设置图片和文字，添加fragment

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

        ButterKnife.bind(this);

        mTabHost.setup(this, getSupportFragmentManager(), android.R.id.tabcontent);//fragment管理
        mTabHost.getTabWidget().setDividerDrawable(null); // 去掉分割线

        for (int i = 0; i < mImages.length; i++) {
            // Tab按钮添加文字和图片
            TabHost.TabSpec tabSpec = mTabHost.newTabSpec(mFragmentTags[i]).setIndicator(getImageView(i));
            // 添加Fragment
            mTabHost.addTab(tabSpec, FragmentTab.class, null);
            // 设置Tab按钮的背景
            mTabHost.getTabWidget().getChildAt(i).setBackgroundResource(R.color.pedo_actionbar_bkg);
        }
    }

 

第五步：写fragment

@Bind(R.id.tab_tv_text) TextView mTvText;

    private View mViewContent; // 缓存视图内容

    @Nullable @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
                             @Nullable Bundle savedInstanceState) {
        if (mViewContent == null) {
            mViewContent = inflater.inflate(R.layout.fragment_tab, container, false);
        }

        // 缓存View判断是否含有parent, 如果有需要从parent删除, 否则发生已有parent的错误.
        ViewGroup parent = (ViewGroup) mViewContent.getParent();
        if (parent != null) {
            parent.removeView(mViewContent);
        }

        ButterKnife.bind(this, mViewContent);
        return mViewContent;
    }

    @Override public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        // 显示Fragment的Tag信息
        mTvText.setText(String.valueOf("Page: " + getTag()));
    }

    @Override public void onDestroyView() {
        super.onDestroyView();
        ButterKnife.unbind(this);
    }

 

<android.support.v4.app.FragmentTabHost
android:id="@android:id/tabhost"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">

    <LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">

        <TabWidget
android:id="@android:id/tabs"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:layout_gravity="bottom"/>

        <FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"/>

    </LinearLayout>

</android.support.v4.app.FragmentTabHost>