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团队——和谐共生(5)

2022-06-14 21:03:11  阅读:122  来源: 互联网

标签:null tab private transaction 共生 和谐 import 团队 id


和谐共生(5)

今天对我做的界面进行了完善,由于我的个人习惯问题,只是在样例项目中进行了完成,自己的项目还没有进行完善,先来看一下完善前后的对比

 

 

 

 

 

 

 

 完善之后最主要的区别是内容能够在主界面进行显示,不在只显示文本内容。

之前自己使用的是viewPager+fragmenBlank+适配器,这次只使用了Fragment+事务

核心代码

import androidx.appcompat.app.AppCompatActivity;

import androidx.fragment.app.Fragment;

import androidx.fragment.app.FragmentActivity;

import androidx.viewpager2.widget.ViewPager2;

 

import android.annotation.SuppressLint;

import android.app.AlertDialog;

import android.app.Dialog;

import android.app.FragmentManager;

import android.app.FragmentTransaction;

import android.content.DialogInterface;

import android.content.Intent;

import android.graphics.Color;

import android.os.Bundle;

import android.view.KeyEvent;

import android.view.View;

import android.widget.ImageView;

import android.widget.LinearLayout;

import android.widget.TextView;

 

import java.util.ArrayList;

import java.util.List;

 

public class MainActivity extends FragmentActivity implements View.OnClickListener {

 

    private WeixinFragment firstFragment = null;// 用于显示微信界面

    private ContactListFragment secondFragment = null;// 用于显示通讯录界面

    private FindFragment thirdFragment = null;// 用于显示发现界面

    private SelfFragment fourthFragment = null;// 用于显示我界面

 

    private View firstLayout = null;// 微信显示布局

    private View secondLayout = null;// 通讯录显示布局

    private View thirdLayout = null;// 发现显示布局

    private View fourthLayout = null;// 我显示布局

 

    /*声明组件变量*/

    private ImageView weixinImg = null;

    private ImageView contactImg = null;

    private ImageView findImg = null;

    private ImageView selfImg = null;

 

    private TextView weixinText = null;

    private TextView contactText = null;

    private TextView  findText = null;

    private TextView selfText = null;

    private FragmentManager fragmentManager = null;// 用于对Fragment进行管理

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);// 初始化布局元素

        initViews();

        fragmentManager = getFragmentManager();//用于对Fragment进行管理

        // 设置默认的显示界面

        setTabSelection(0);

    }

 

    /**

     * 在这里面获取到每个需要用到的控件的实例,并给它们设置好必要的点击事件

     */

    @SuppressLint("NewApi")

    public void initViews() {

        fragmentManager = getFragmentManager();

        firstLayout = findViewById(R.id.weixin_layout);

        secondLayout = findViewById(R.id.contacts_layout);

        thirdLayout = findViewById(R.id.find_layout);

        fourthLayout = findViewById(R.id.self_layout);

 

        weixinImg = (ImageView) findViewById(R.id.weixin_img);

        contactImg = (ImageView) findViewById(R.id.contact_img);

        findImg = (ImageView) findViewById(R.id.find_img);

        selfImg = (ImageView) findViewById(R.id.self_img);

 

        weixinText = (TextView) findViewById(R.id.weixin_text);

        contactText = (TextView) findViewById(R.id.contact_text);

        findText = (TextView) findViewById(R.id.find_text);

        selfText = (TextView) findViewById(R.id.self_text);

 

        //处理点击事件

        firstLayout.setOnClickListener(this);

        secondLayout.setOnClickListener(this);

        thirdLayout.setOnClickListener(this);

        fourthLayout.setOnClickListener(this);

    }

    @Override

    public void onClick(View v) {

//        changeTab(view.getId());

        switch (v.getId()) {

            case R.id.weixin_layout:

                setTabSelection(0);// 当点击了微信时,选中第1个tab

                break;

            case R.id.contacts_layout:

                setTabSelection(1);// 当点击了通讯录时,选中第2个tab

                break;

            case R.id.find_layout:

                setTabSelection(2);// 当点击了发现时,选中第3个tab

                break;

            case R.id.self_layout:

                setTabSelection(3);// 当点击了我时,选中第4个tab

                break;

            default:

                break;

        }

    }

 

 

    /**

     * 根据传入的index参数来设置选中的tab页 每个tab页对应的下标。0表示微信,1表示通讯录,2表示发现,3表示我

     */

    @SuppressLint("NewApi")

    private void setTabSelection(int index) {

        clearSelection();// 每次选中之前先清除掉上次的选中状态

        FragmentTransaction transaction = fragmentManager.beginTransaction();// 开启一个Fragment事务

        hideFragments(transaction);// 先隐藏掉所有的Fragment,以防止有多个Fragment显示在界面上的情况

        switch (index) {

            case 0:

                // 当点击了我的微信tab时改变控件的图片和文字颜色

                weixinImg.setImageResource(R.drawable.tab_weixin);//修改布局中的图片

                weixinText.setTextColor(Color.parseColor("#0090ff"));//修改字体颜色

 

                if (firstFragment == null) {

                    /*获取登录activity传过来的微信号*/

                    Intent intent = getIntent();

                    String number = intent.getStringExtra("weixin_number");

                    // 如果FirstFragment为空,则创建一个并添加到界面上

                    firstFragment = new WeixinFragment(number);

                    transaction.add(R.id.fragment, firstFragment);

 

                } else {

                    // 如果FirstFragment不为空,则直接将它显示出来

                    transaction.show(firstFragment);//显示的动作

                }

                break;

            // 以下和firstFragment类同

            case 1:

                contactImg.setImageResource(R.drawable.tab_contact);

                contactText.setTextColor(Color.parseColor("#0090ff"));

                if (secondFragment == null) {

                    /*获取登录activity传过来的微信号*/

                    Intent intent = getIntent();

                    String number = intent.getStringExtra("weixin_number");

                    secondFragment = new ContactListFragment(number);

                    transaction.add(R.id.fragment, secondFragment);

                } else {

                    transaction.show(secondFragment);

                }

                break;

            case 2:

                findImg.setImageResource(R.drawable.tab_find);

                findText.setTextColor(Color.parseColor("#0090ff"));

                if (thirdFragment == null) {

                    thirdFragment = new FindFragment();

                    transaction.add(R.id.fragment, thirdFragment);

                } else {

                    transaction.show(thirdFragment);

                }

                break;

            case 3:

                selfImg.setImageResource(R.drawable.tab_me);

                selfText.setTextColor(Color.parseColor("#0090ff"));

                if (fourthFragment == null) {

                    fourthFragment = new SelfFragment();

                    transaction.add(R.id.fragment, fourthFragment);

                } else {

                    transaction.show(fourthFragment);

                }

                break;

        }

        transaction.commit();

 

    }

 

    /**

     * 清除掉所有的选中状态

     */

    private void clearSelection() {

        weixinImg.setImageResource(R.drawable.tab_weixin);

        weixinText.setTextColor(Color.parseColor("#82858b"));

 

        contactImg.setImageResource(R.drawable.tab_contact);

        contactText.setTextColor(Color.parseColor("#82858b"));

 

        findImg.setImageResource(R.drawable.tab_find);

        findText.setTextColor(Color.parseColor("#82858b"));

 

        selfImg.setImageResource(R.drawable.tab_me);

        selfText.setTextColor(Color.parseColor("#82858b"));

    }

 

    /**

     * 将所有的Fragment都设置为隐藏状态 用于对Fragment执行操作的事务

     */

    @SuppressLint("NewApi")

    private void hideFragments(FragmentTransaction transaction) {

        if (firstFragment != null) {

            transaction.hide(firstFragment);

        }

        if (secondFragment != null) {

            transaction.hide(secondFragment);

        }

        if (thirdFragment != null) {

            transaction.hide(thirdFragment);

        }

        if (fourthFragment != null) {

            transaction.hide(fourthFragment);

        }

    }

 

    //封装一个AlertDialog

    private void exitDialog() {

        Dialog dialog = new AlertDialog.Builder(this)

                .setTitle("温馨提示")

                .setMessage("您确定要退出程序吗?")

                .setPositiveButton("关闭微信", new DialogInterface.OnClickListener() {

                    @Override

                    public void onClick(DialogInterface arg0, int arg1) {

                        finish();

                    }

                })

                .setNegativeButton("取消", new DialogInterface.OnClickListener() {

                    @Override

                    public void onClick(DialogInterface arg0, int arg1) {

                    }

                }).create();

        dialog.show();//显示对话框

    }

 

    /**

     * 返回菜单键监听事件

     */

    @Override

    public boolean onKeyDown(int keyCode, KeyEvent event) {

        if (keyCode == KeyEvent.KEYCODE_BACK) {//如果是返回按钮

            exitDialog();

        }

        return super.onKeyDown(keyCode, event);

    }

}

 

标签:null,tab,private,transaction,共生,和谐,import,团队,id
来源: https://www.cnblogs.com/jztuandui/p/16376319.html

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