android - 调用 startActivity 方法时的 returnActivity 事件

Question

我有一个 Activity，我用 startActivity 启动了一个应用程序选择器。

问题:在用户选择首选邮件应用程序之前，我如何才能完成父 Activity ？

 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

如前所述in this post ，您可以使用 IntentPicker 而不是 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 Activity 中添加以下回调方法来监听 Intent 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
    }
}