使用完成功能将数据从活动发送回片段

Question

我曾尝试从从 Fragment 实例化的 Activity 发送数据。将数据从 Activity 发送回 Fragment。我尝试了以下代码

片段：

Instantiated the Fragment
    Intent intent = new Intent(Fragement.this,Activity);
    startActivity(intent);

活动：

Intent intent = new Intent(Activitiy.this, Fragment);
                intent.putExtra("Sent", "Something");
                setResult(RESULT_OK, intent);
                finish();

将结果发送到片​​段

In Fragment trying to implement onActivityResult but not even able to define the method.

Answer 1

使用startActivityForResult 调用您的活动，如下所示

Intent intent = new Intent(Fragement.this, Activity);
startActivityForResult(intent, 1);

要获得结果，请在您的片段中实现 onActivityResult

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == Activity.RESULT_OK && requestCode == 1) {
        // here you can retrieve your bundle data.
        String yourdata = data.getStringExtra("Sent");
    }
}

在您的activity 中，请关注以下内容。

Intent intent = new Intent();
resultIntent.putExtra("Sent", "String data"); 
setResult(RESULT_OK, intent );
finish();

非常重要

你必须在你的Activity中overrideonActivityResult（在哪个片段被加载）

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
       super.onActivityResult(requestCode, resultCode, data);
    }

完整示例，see this

Answer 2

您必须通过 startActviityForResult 传递请求代码来启动活动

Intent intent = new Intent(Fragement.this, Activity);
startActivityForResult(intent, myRequestCode);