Androi开发 ---Fragment片段布局案例

2023-08-25 12:57:16

效果图：

1、MainActivity.java

package com.example.android_activity;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

public class MainActivity extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

    }

    //片段布局

    public void test_3(View view){

        Intent intent=new Intent(this,WeixinActivity.class);

        startActivity(intent);

    }

}

2、WeixinActivity.java

package com.example.android_activity;

import android.app.Activity;

import android.app.FragmentManager;

import android.app.FragmentTransaction;

import android.os.Bundle;

import android.view.Window;

import android.view.WindowManager;

import android.widget.RadioGroup;

public class WeixinActivity extends Activity {

    //片段管理器

    private FragmentManager fm;

    //片段事务对象

    private FragmentTransaction trans;

    //获取单选按钮组

    private RadioGroup rg;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_NO_TITLE);

        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);

        setContentView(R.layout.activity_weixin);

        rg=(RadioGroup)findViewById(R.id.radgroup);

        //1：获取片段管理器对象

        fm=getFragmentManager();

        //2:获取片段事务对象

        trans=fm.beginTransaction();

        trans.add(R.id.mainFrame,new WeixinFragment());

        trans.commit();

        //添加选择改变事件

        rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

            @Override

            public void onCheckedChanged(RadioGroup radioGroup, int i) {

                switch (i){

                    case R.id.rad_1:

                        trans=fm.beginTransaction();

                        trans.replace(R.id.mainFrame,new WeixinFragment());

                        trans.addToBackStack("back");

                        trans.commit();

                        break;

                    case R.id.rad_2:

                        trans=fm.beginTransaction();

                        trans.replace(R.id.mainFrame,new PhoneNoteFragment());

                        trans.addToBackStack("back");

                        trans.commit();

                        break;

                    case R.id.rad_3:

                        trans=fm.beginTransaction();

                        trans.replace(R.id.mainFrame,new FindFragment());

                        trans.addToBackStack("back");

                        trans.commit();

                        break;

                }

            }

        });

    }

}

3、WeixinFragment.java

package com.example.android_activity;

import android.app.Fragment;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.Button;

import android.widget.Toast;

public class WeixinFragment extends Fragment {

    public WeixinFragment() {

    }

    private Button btn;

    @Override

    public View onCreateView(LayoutInflater inflater, ViewGroup container,

                             Bundle savedInstanceState) {

        //投影【将一个Layout布局xml文件生成一个View对象】

        View view=inflater.inflate(R.layout.fragment_weixin, container, false);

        btn=(Button)view.findViewById(R.id.test_btn);

        btn.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                Toast.makeText(getActivity(),"OK",Toast.LENGTH_LONG).show();

            }

        });

        return view;

    }

}

4、PhoneNoteFragment.java

package com.example.android_activity;

import android.app.Fragment;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

/**

 * A simple {@link Fragment} subclass.

 */

public class PhoneNoteFragment extends Fragment {

    public PhoneNoteFragment() {

        // Required empty public constructor

    }

    @Override

    public View onCreateView(LayoutInflater inflater, ViewGroup container,

                             Bundle savedInstanceState) {

        // Inflate the layout for this fragment

        return inflater.inflate(R.layout.fragment_phone_note, container, false);

    }

}

5、FindFragment.java

package com.example.android_activity;

import android.app.Fragment;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

/**

 * A simple {@link Fragment} subclass.

 */

public class FindFragment extends Fragment {

    public FindFragment() {

        // Required empty public constructor

    }

    @Override

    public View onCreateView(LayoutInflater inflater, ViewGroup container,

                             Bundle savedInstanceState) {

        // Inflate the layout for this fragment

        return inflater.inflate(R.layout.fragment_find, container, false);

    }

}

6、activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:id="@+id/activity_main"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical"

    >

    <Button

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="FrameLayout"

        android:onClick="test_1"

        />

    <Button

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="FrameLayout2"

        android:onClick="test_2"

        />

    <Button

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="Fragment案例"

        android:onClick="test_3"

        />

    <Button

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:text="GridLayout布局[4.0]"

        android:onClick="test_4"

        />

</LinearLayout>

7、activity_weixin.xml

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:id="@+id/activity_weixin"

    android:layout_width="match_parent"

    android:layout_height="match_parent">

    <!--绘制内容显示容器-->

    <FrameLayout

        android:id="@+id/mainFrame"

        android:layout_width="match_parent"

        android:layout_height="match_parent"/>

    <LinearLayout

        android:id="@+id/weixinMenu"

        android:layout_alignParentBottom="true"

        android:orientation="horizontal"

        android:layout_width="match_parent"

        android:layout_height="wrap_content">

        <RadioGroup

            android:id="@+id/radgroup"

            android:checkedButton="1"

            android:orientation="horizontal"

            android:layout_width="match_parent"

            android:layout_height="match_parent">

            <RadioButton

                android:id="@+id/rad_1"

                android:text="微信"

                android:drawableTop="@mipmap/ic_launcher"

                android:clickable="true"

                android:button="@null"

                android:gravity="center"

                android:layout_width="match_parent"

                android:layout_weight="1"

                android:layout_height="wrap_content" />

            <RadioButton

                android:id="@+id/rad_2"

                android:text="通讯录"

                android:drawableTop="@mipmap/ic_launcher"

                android:clickable="true"

                android:button="@null"

                android:gravity="center"

                android:layout_width="match_parent"

                android:layout_weight="1"

                android:layout_height="wrap_content" />

            <RadioButton

                android:id="@+id/rad_3"

                android:text="发现"

                android:gravity="center"

                android:drawableTop="@mipmap/ic_launcher"

                android:clickable="true"

                android:button="@null"

                android:layout_width="match_parent"

                android:layout_weight="1"

                android:layout_height="wrap_content" />

            <RadioButton

                android:id="@+id/rad_4"

                android:text="我"

                android:gravity="center"

                android:drawableTop="@mipmap/ic_launcher"

                android:clickable="true"

                android:button="@null"

                android:layout_width="match_parent"

                android:layout_weight="1"

                android:layout_height="wrap_content" />

        </RadioGroup>

    </LinearLayout>

    <LinearLayout

        android:layout_above="@id/weixinMenu"

        android:layout_width="match_parent"

        android:layout_height="2dp"

        android:background="@android:color/darker_gray"></LinearLayout>

</RelativeLayout>

8、fragment_weixin.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical">

    <TextView

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:textSize="30sp"

        android:text="我是微信" />

    <Button

        android:id="@+id/test_btn"

        android:text="点我试试"

        android:onClick="testClick"

        android:layout_width="match_parent"

        android:layout_height="wrap_content" />

</LinearLayout>

9、fragment_phone_note.xml

<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"

    >

    <!-- TODO: Update blank fragment layout -->

    <TextView

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:textSize="30dp"

        android:textColor="@android:color/holo_red_dark"

        android:text="这是通讯录" />

</LinearLayout>

10、fragment_find.xml

<FrameLayout 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"

    tools:context="com.example.FindFragment">

    <!-- TODO: Update blank fragment layout -->

    <TextView

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:textSize="30sp"

        android:textColor="@android:color/holo_green_light"

        android:text="我发现好多朋友" />

</FrameLayout>

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