调用 startActivity 方法时的 returnActivity 事件

Question

我有一个Activity，我用startActivity 启动一个应用程序选择器。

问题：如何在完成父活动后等待用户选择首选邮件应用程序？

 Uri uri = Uri.parse("mailto:" + "someone@mail.com")
                .buildUpon()
                .appendQueryParameter("subject", "subject")
                .appendQueryParameter("body", "body")
                .build();

 Intent emailIntent = new Intent(Intent.ACTION_SENDTO, uri);
 startActivity(Intent.createChooser(emailIntent, "chooser Title"));

 finish();

Answer 1

如in this post 所述，您可以使用 IntentPicker 代替 IntentChooser

Intent intentPick = new Intent();
intentPick.setAction(Intent.ACTION_PICK_ACTIVITY);
intentPick.putExtra(Intent.EXTRA_TITLE, "Launch using");
intentPick.putExtra(Intent.EXTRA_INTENT, emailIntent);
this.startActivityForResult(intentPick, REQUEST_CODE_MY_PICK);
// You have just started a picker activity, 

然后您可以通过在您的活动中添加以下回调方法来监听意图选择的结果：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
    if (requestCode == REQUEST_CODE_MY_PICK) {
         // start the activity the user picked from the list
         startActivity(data);

         //you can finish() your activity here
    }
}