FragmentLayout案例

第一步  注册布局

<?xml version="1.0" encoding="utf-8"?>
<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"
    tools:context=".activity.MainActivity">
 
    <FrameLayout
        android:id="@+id/frag"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
         />
    <RadioGroup
        android:id="@+id/group"
        android:layout_width="match_parent"
        android:layout_height="66dp"
        android:orientation="horizontal"
        >
        <RadioButton
            android:id="@+id/q1"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:text="首页"
            android:button="@null"
            android:gravity="center"
            android:textSize="20dp"
            android:background="@drawable/selects"
            android:layout_height="66dp" />
        <RadioButton
            android:id="@+id/q2"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:text="服务"
            android:button="@null"
            android:gravity="center"
            android:textSize="20dp"
            android:background="@drawable/selects"
            android:layout_height="66dp" />
        <RadioButton
            android:id="@+id/q3"
            android:layout_width="0dp"
            android:layout_weight="1"
            android:text="我的"
            android:button="@null"
            android:gravity="center"
            android:textSize="20dp"
            android:background="@drawable/selects"
            android:layout_height="66dp" />
    </RadioGroup>
 
</LinearLayout>

第二步 核心功能实现

package com.bwie.moni7.activity;
 
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.RadioGroup;
 
import com.bwie.moni7.R;
import com.bwie.moni7.frag.FragmentOne;
import com.bwie.moni7.frag.FragmentThree;
import com.bwie.moni7.frag.FragmentTwo;
 
public class MainActivity extends AppCompatActivity {
 
    private FrameLayout frag;
    private FragmentManager manager;
    private FragmentOne one;
    private FragmentTwo two;
    private FragmentThree three;
    private FragmentTransaction transaction;
    private RadioGroup group;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
 
        frag = findViewById(R.id.frag);
        group = findViewById(R.id.group);
 
        manager = getSupportFragmentManager();
 
        one = new FragmentOne();
        two = new FragmentTwo();
        three = new FragmentThree();
 
        transaction = manager.beginTransaction();
 
        transaction.add(R.id.frag,one);
        transaction.add(R.id.frag,two);
        transaction.add(R.id.frag,three);
 
        transaction.show(one).hide(two).hide(three);
 
        transaction.commit();
 
        group.check(group.getChildAt(0).getId());
 
        group.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                FragmentTransaction transaction1 = manager.beginTransaction();
                switch (checkedId){
                        case R.id.q1:
                        transaction1.show(one).hide(two).hide(three);
                        break;
                        case R.id.q2:
                        transaction1.show(two).hide(one).hide(three);
                        break;
                        case R.id.q3:
                        transaction1.show(three).hide(one).hide(two);
                        break;
                }
                transaction1.commit();
 
 
            }
        });
 
    }
}