<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <EditText android:id="@+id/main_text" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="input something"/> <Button android:id="@+id/main_btn_speech" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="发音" /> </LinearLayout>