Android 界面设计：使用 ConstraintLayout 布局和 EditText 获取用户输入

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_height="match_parent" android:layout_width="match_parent" tools:context=".ui.home.HomeFragment">

<TextView
    android:layout_height="wrap_content"
    android:layout_width="match_parent"
    android:layout_marginEnd="8dp"
    android:textAlignment="center"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    android:textSize="20sp"
    app:layout_constraintEnd_toEndOf="parent"
    android:layout_marginTop="8dp"
    app:layout_constraintBottom_toTopOf="@id/button"
    android:layout_marginStart="8dp"
    android:id="@+id/text_home" />

<EditText
    android:layout_height="wrap_content"
    android:layout_width="match_parent"
    android:layout_marginEnd="8dp"
    android:hint="请输入分享链接末尾数字"
    app:layout_constraintTop_toTopOf="@id/text_home"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    android:layout_marginTop="8dp"
    android:layout_marginStart="8dp"
    android:id="@+id/edit_text" />

<Button
    android:layout_height="wrap_content"
    android:layout_width="wrap_content"
    android:layout_marginEnd="8dp"
    app:layout_constraintStart_toStartOf="parent"
    android:onClick="dow_imgone"
    app:layout_constraintEnd_toEndOf="parent"
    android:layout_marginTop="8dp"
    app:layout_constraintBottom_toBottomOf="parent"
    android:layout_marginStart="8dp"
    app:layout_constraintTop_toBottomOf="@id/edit_text"
    android:id="@+id/button"
    android:text="@string/dow_img" />

</androidx.constraintlayout.widget.ConstraintLayout>

public void dow_imgone(View view) { EditText editText = findViewById(R.id.edit_text); String inputText = editText.getText().toString(); Snackbar.make(view, '输入的内容为: ' + inputText, Snackbar.LENGTH_LONG) .setAction('Action', null).show(); }