安卓我的项目compileSdk为32，在应用startActivityForResult()办法时发现Android studio提醒此办法曾经废除了。
目前的代替计划案例。
// 确保 app 的 build.gradle中曾经引入了androidx.appcompat:appcompatdependencies { implementation 'androidx.appcompat:appcompat:1.4.1' // 确定 }从A跳到B，A页面逻辑
package com.example.test1;import androidx.activity.result.ActivityResult;import androidx.activity.result.ActivityResultCallback;import androidx.activity.result.ActivityResultLauncher;import androidx.activity.result.contract.ActivityResultContracts;import androidx.appcompat.app.AppCompatActivity;import android.annotation.SuppressLint;import android.app.Activity;import android.content.Intent;import android.graphics.Color;import android.os.Bundle;import android.util.Log;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;import android.widget.Toast;import com.example.test1.ui.login.LoginActivity; // B页面例子import com.google.android.material.snackbar.Snackbar;public class MainActivity extends AppCompatActivity implements View.OnClickListener { private static String TAG = "MainActivity"; private ActivityResultLauncher<Intent> register; @SuppressLint("ResourceAsColor") @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); findViewById(R.id.my_button).setOnClickListener(this); register = registerForActivityResult(new ActivityResultContracts.StartActivityForResult(), new ActivityResultCallback<ActivityResult>() { @Override public void onActivityResult(ActivityResult result) { Log.i(TAG, "onActivityResult: _____" + result); if (result != null) { Intent intent = result.getData(); if (intent != null && result.getResultCode() == Activity.RESULT_OK) { Bundle myBundle = intent.getExtras(); String my_name = myBundle.getString("my_name"); String my_sex = myBundle.getString("my_sex"); // 下一个Activity回退后 在此获取返回的值 Log.i(TAG, "onCreate: 获取返回传值my_name__________" + my_name); // ___获取返回传值my_namezhangsan000 Log.i(TAG, "onCreate: 获取返回传值my_sex__________" + my_sex); // ___获取返回传值my_sex男 } } } }); } @Override public void onClick(View view) { if (view.getId() == R.id.my_button) { Intent intent = new Intent(this, LoginActivity.class); // 用register.launch跳转至B register.launch(intent); } }}从A跳到B，B页面回退逻辑
// B页面的后退逻辑public void myBack(View view) { Intent intent = new Intent(); Bundle bundle = new Bundle(); bundle.putString("my_name", "zhangsan000"); bundle.putString("my_sex", "男"); intent.putExtras(bundle); // 携带用意返回上一个页面 RESULT_OK代表解决胜利了 setResult(Activity.RESULT_OK, intent); // 完结以后页面 finish();};