Use the navigation bar at the bottom to create a template TabActivity

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This link: https://blog.csdn.net/weixin_43219615/article/details/100144140

Apply a fixed frame to use when you create a navigation bar at the bottom TabActivity, the following are the main code and the Notes an example.

1. xml file.

<?xml version="1.0" encoding="utf-8"?>
<!--根布局必须是TabHost id必须为@android:id/tabhost-->
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@android:id/tabhost">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <!--页面布局都挂在这个框架下-->
        <FrameLayout
            android:id="@android:id/tabcontent"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginBottom="@dimen/tab_bar_height"/>
        
        <!--id必须为@android:id/tabs-->
        <TabWidget
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:visibility="gone"
            android:id="@android:id/tabs"/>

        <!--实际的底部标签-->
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="@dimen/tab_bar_height"
            android:layout_alignParentBottom="true"
            android:gravity="bottom"
            android:orientation="horizontal">

            <!--第一个标签-->
            <LinearLayout
                android:id="@+id/ll_first"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:orientation="vertical">
                
                <TextView
                    style="@style/TabButton"
                    android:drawableTop="@drawable/tab_first_selector"
                    android:text="@string/tab_first"/>
            </LinearLayout>

            <!--第二个标签-->
            <LinearLayout
                android:id="@+id/ll_second"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:orientation="vertical">

                <TextView
                    style="@style/TabButton"
                    android:drawableTop="@drawable/tab_second_selector"
                    android:text="@string/tab_second"/>
            </LinearLayout>

            <!--第三个标签-->
            <LinearLayout
                android:id="@+id/ll_third"
                android:layout_width="0dp"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:orientation="vertical">

                <TextView
                    style="@style/TabButton"
                    android:drawableTop="@drawable/tab_third_selector"
                    android:text="@string/tab_third"/>
            </LinearLayout>
        </LinearLayout>
    </RelativeLayout>
</TabHost>

2. Java code.

package xyz.strasae.androidlearn.group;

import android.app.TabActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.LinearLayout;
import android.widget.TabHost;

@SuppressWarnings("all")
public class TabActivityDemo extends TabActivity implements View.OnClickListener {
    private String TAG = "TabActivityDemo";
    private TabHost tabHost;
    private Bundle bundle = new Bundle();
    private LinearLayout ll_first, ll_second, ll_third;
    private String FIRST_TAG = "first";//第一个标签的标识串
    private String SECOND_TAG = "second";//第二个标签的标识串
    private String THIRD_TAG = "third";//第三个标签的标识串

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        bundle.putString("tag", TAG);
        setContentView(R.layout.activity_tab_demo);
        ll_first = findViewById(R.id.ll_first);
        ll_second = findViewById(R.id.ll_second);
        ll_third = findViewById(R.id.ll_third);
        ll_first.setOnClickListener(this);
        ll_second.setOnClickListener(this);
        ll_third.setOnClickListener(this);
        //获取tabhost
        tabHost  = this.getTabHost();
        //添加第一个标签
        tabHost.addTab(getNewTab(FIRST_TAG, R.string.tab_first, R.drawable.tab_first_selector, TabFirstActivity.class));
        tabHost.addTab(getNewTab(SECOND_TAG, R.string.tab_second, R.drawable.tab_first_selector, TabSecondActivity.class));
        tabHost.addTab(getNewTab(THIRD_TAG, R.string.tab_third, R.drawable.tab_first_selector, TabThirdActivity.class));
        changeContainerView(ll_first);
    }

    @Override
    public void onClick(View view) {
        changeContainerView(view);
    }

    private TabHost.TabSpec getNewTab(String spec, int label, int icon, Class<?> cls) {
        Intent intent = new Intent(this, cls).putExtras(bundle);
        return tabHost.newTabSpec(spec).setContent(intent).setIndicator(this.getString(label), this.getResources().getDrawable(icon));
    }

    private void changeContainerView(View view) {
        ll_first.setSelected(false);
        ll_second.setSelected(false);
        ll_third.setSelected(false);
        view.setSelected(true);
        if (view.getId() == R.id.ll_first) {
            //根据标签设置
            tabHost.setCurrentTabByTag(FIRST_TAG);
        } else if(view.getId() == R.id.ll_second) {
            tabHost.setCurrentTabByTag(SECOND_TAG);
        } else if(view.getId() == R.id.ll_third) {
            tabHost.setCurrentTabByTag(THIRD_TAG);
        }
    }
}