为什么会出现'startActivityForResult(android.content.Intent, int)' is deprecated

'startActivityForResult(android.content.Intent, int)' 是 Android 中一个用于启动新活动并获取结果的方法。它已经被标记为过时（deprecated），因为自 Android 10（API 级别 29）起，Google 引入了一种新的启动活动的方式，即 'startActivityForResult(android.content.Intent, int)' 方法的替代品。新方法是 'startActivityForResult(android.content.Intent, android.app.ActivityResultLaunche r)'，它可以更好地支持 Android 的生命周期，并提供更好的灵活性和可扩展性。

如果你想使用 'startActivityForResult(android.content.Intent, int)' 方法，可以将 minSdkVersion 设置为 29 或更低级别。但建议你尽快迁移到新的方法，以便更好地支持最新的 Android 版本，并避免在未来的版本中出现兼容性问题。

相关问题

'startActivityForResult(android.content.Intent, int)' is deprecated

`startActivityForResult(Intent, int)` is indeed deprecated since Android 11 (API level 30). It means that this method will no longer be supported in future versions of Android. Instead, you should use the `registerForActivityResult` method, which is a more modern way to handle activities that return results.

Here's an example of how to use `registerForActivityResult`:

val someActivityResultLauncher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) { result ->
    if (result.resultCode == Activity.RESULT_OK) {
        // Handle the result
        val data: Intent? = result.data
    }
}

// Call the activity with startActivityForResult
val intent = Intent(this, SomeActivity::class.java)
someActivityResultLauncher.launch(intent)

With this approach, you create an instance of `ActivityResultLauncher` by calling `registerForActivityResult`, passing in an instance of `ActivityResultContracts.StartActivityForResult`. You then define a lambda that will be called when the activity returns a result. Finally, you call `someActivityResultLauncher.launch(intent)` to start the activity and wait for the result to come back.

Note that `registerForActivityResult` is only available in AndroidX libraries, so if you're not already using them, you'll need to migrate your project to AndroidX before you can use this method.

startActivityForResult过时了

是的，`startActivityForResult()` 方法在 Android API level deprecated in API level deprecated in API level deprecated in API level deprecated in API level deprecated in API level deprecated in API level deprecated in API level 28.

现在，推荐使用 `startActivity()` 方法来启动一个 Activity，并通过 `Intent` 的一些附加信息来传递数据。然后，在目标 Activity 中，可以使用 `setResult()` 方法设置返回结果，并在 `onActivityResult()` 方法中接收结果。

以下是一个示例代码：

// 启动目标 Activity
Intent intent = new Intent(this, TargetActivity.class);
intent.putExtra("key", value);
startActivity(intent);

// 在目标 Activity 中设置返回结果
Intent resultIntent = new Intent();
resultIntent.putExtra("result", resultValue);
setResult(Activity.RESULT_OK, resultIntent);
finish();

// 在调用 startActivityForResult() 的 Activity 中接收返回结果
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == REQUEST_CODE && resultCode == Activity.RESULT_OK) {
        // 处理返回结果
        String result = data.getStringExtra("result");
        // ...
    }
}

这种方法提供了更灵活的方式来处理 Activity 之间的通信和数据传递。