Android Studio —— 界面切换且双端传参

CSDN源码下载

     activity_main.xml

     
     MainActivity.java

package com.example.application;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

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

        Button btnLogin = findViewById(R.id.btnLogin);
        if(btnLogin != null){
            btnLogin.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    EditText iUser      = findViewById(R.id.iUser);
                    EditText iPassword  = findViewById(R.id.iPassword);

                    Intent intent = new Intent(MainActivity.this,MainActivity2.class);
                    intent.putExtra("User",iUser.getText().toString());
                    intent.putExtra("Password",iPassword.getText().toString());
                    startActivityForResult(intent,0xAA);
                }
            });
        }

        Button btnExit = findViewById(R.id.btnExit);
        if(btnExit != null){
            btnExit.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    finish();
                }
            });
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {

        // requestCode为界面1请求2的代号,resultCode为界面2请求1的代号
        if (requestCode == 0xAA && resultCode == 0xBB) {
            String result = data.getStringExtra("ReturnString");
            Toast.makeText(MainActivity.this, result, Toast.LENGTH_SHORT).show();
        }
        super.onActivityResult(requestCode, resultCode, data);
    }
}

     
     activity_main2.xml

     
     MainActivity2.java

package com.example.application;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity2 extends AppCompatActivity {

    Intent intent;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        intent = getIntent();
        String user = intent.getStringExtra("User");
        String pwd  = intent.getStringExtra("Password");

        TextView info = findViewById(R.id.info);
        if(info != null){
            info.setText("获取的信息：nnttttt用户名："+user+"nnttttt密码："+pwd);
        }

        Button btnReturn = findViewById(R.id.btnReturn);
        if(btnReturn != null){
            btnReturn.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    EditText returnInfo = findViewById(R.id.returnInfo);
                    intent.putExtra("ReturnString",returnInfo.getText().toString());
                    setResult(0xBB,intent);
                    finish();
                }
            });
        }
    }
}

笔者 - jxd

微信公众号搜索 “码农总动员” 或 微信扫描下方二维码，了解更多你不知道的XX，O(∩_∩)O