1.主要代码

改进后的界面为：

2.掌握复杂控件与adapter的使用。（请使用RecycleView进行设计）

MainActivity

package com.example.myapplication;

import androidx.appcompat.app.AppCompatActivity;
import android.app.Fragment;

import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.widget.TextView;


public class MainActivity extends AppCompatActivity implements View.onClickListener {
    private Fragment weixinAdventure = new weixinAdventure();
    private Fragment weixinCommitment = new weixinCommitment();
    private Fragment weixinForum = new weixinForum();
    private Fragment weixinLevel = new weixinLevel();
    private FragmentManager fragmentManager;
    private View LinearLayout1,LinearLayout2,LinearLayout3,LinearLayout4;
    private TextView textView1,textView2,textView3,textView4;


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

        LinearLayout1 = findViewById(R.id.LinearLayout_weixinAdventure);
        LinearLayout2 = findViewById(R.id.LinearLayout_weixinCommitment);
        LinearLayout3 = findViewById(R.id.LinearLayout_weixinForum);
        LinearLayout4 = findViewById(R.id.LinearLayout_weixinLevel);
        textView1 = findViewById(R.id.textView1);
        textView2 = findViewById(R.id.textView2);
        textView3 = findViewById(R.id.textView3);
        textView4 = findViewById(R.id.textView4);

        LinearLayout1.setonClickListener(this);
        LinearLayout2.setonClickListener(this);
        LinearLayout3.setonClickListener(this);
        LinearLayout4.setonClickListener(this);
        textView1.setonClickListener(this);
        textView2.setonClickListener(this);
        textView3.setonClickListener(this);
        textView4.setonClickListener(this);
        initFragment();
        showFragment(0);

    }

    private void initFragment(){
        fragmentManager = getFragmentManager();
        FragmentTransaction transaction = fragmentManager.beginTransaction();
        transaction.add(R.id.content,weixinAdventure);
        transaction.add(R.id.content,weixinCommitment);
        transaction.add(R.id.content, weixinForum);
        transaction.add(R.id.content, weixinLevel);
        transaction.commit();
    }

    public void hideFragment(FragmentTransaction transaction){
        transaction.hide(weixinAdventure);
        transaction.hide(weixinCommitment);
        transaction.hide(weixinForum);
        transaction.hide(weixinLevel);
    }



    private void showFragment(int i){
        FragmentTransaction transaction = fragmentManager.beginTransaction();
        hideFragment(transaction);
        switch (i){
            case 0:
                transaction.show(weixinAdventure);
                textView1.setText("冒险");
                break;
            case 1:
                transaction.show(weixinCommitment);
                textView1.setText("委托");
                break;
            case 2:
                transaction.show(weixinForum);
                textView1.setText("论坛");
                break;
            case 3:
                transaction.show(weixinLevel);
                textView1.setText("能力");
                break;
            default:
                break;
        }
        transaction.commit();
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.LinearLayout_weixinAdventure:
                showFragment(0);
                break;
            case R.id.LinearLayout_weixinCommitment:
                showFragment(1);
                break;
            case R.id.LinearLayout_weixinForum:
                showFragment(2);
                break;
            case R.id.LinearLayout_weixinLevel:
                showFragment(3);
                break;
            default:
                break;

        }
    }
}

item.xml

activity_contacts_details.xml

ContactsDetails

package com.example.myapplication;

import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

public class ContactsDetails extends AppCompatActivity {

    private TextView wechat_contacts_details;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_contacts_details);
        Log.d("life","activity_contacts_details is creating...");
        Intent intent = getIntent();
        String name = intent.getStringExtra("name");
        int age = intent.getIntExtra("age", 18);
        Log.d("life","name:"+name+",age:"+age);
        wechat_contacts_details = findViewById(R.id.wechat_contacts_details);
        wechat_contacts_details.setText("委托完成后记得领取药剂哦~");

    }
    @Override
    protected void onStart() {
        super.onStart();
        Log.d("life","activity_contacts_details is starting...");
    }

    @Override
    protected void onStop() {
        super.onStop();
        Log.d("life","activity_contacts_details is stopping...");
    }
    @Override
    public void finish() {
        super.finish();
        Log.d("life","activity_contacts_details is finishing...");
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        Log.d("life","activity_contacts_details is destroying...");
    }

    @Override
    public void finishActivity(int requestCode) {
        super.finishActivity(requestCode);
        Log.d("life","activity_contacts_details is finishActivity...");
    }
}

代码仓库：https://github.com/aedela/My_Application3

1. 结果截图