看来我不知道如何从EditText中获取文本字符串。我想使用EditText中的文本，并按下按钮。

layout.xml：

android:id="@+id/popup_menu_root"

android:background="#FFFFFF"

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent" >

android:text="ok"

android:layout_width="fill_parent"

android:layout_height="wrap_content" />

android:id="@+id/edittext"

android:layout_width="fill_parent"

android:layout_height="wrap_content"/>

我的活动：

public class MyClass extends Activity {

public String txtCheckin = "???";

private String txtDescription = "???";

private PopupWindow pw;

@Override

public void onCreate(Bundle icicle) {

super.onCreate(icicle);

// get the instance of the LayoutInflater

LayoutInflater inflater = (LayoutInflater) MyClass.this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

// inflate our view from the corresponding XML file

final View layout = inflater.inflate(R.layout.popuplayout, (ViewGroup)findViewById(R.id.popup_menu_root));

// create a 100px width and 200px height popup window

pw = new PopupWindow(layout, 100, 200, true);

final EditText edittextDescription = (EditText) findViewById(R.id.edittext);

// set actions to buttons we have in our popup

Button button = (Button)layout.findViewById(R.id.popup_menu_button);

button.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View vv) {

if (edittextDescription.getText() != null)

{

String newString = edittextDescription.getText().toString();

transmitCheck("MANUAL", txtCheckin, "1", newString);

}

else

{

transmitCheck("MANUAL", txtCheckin, "1", "???");

}

finish();

}

});

}