如何获取Android中material对话框输入框的值？

Question

我有一个 material 警告对话框，如下所示：

这是对话框的 java 代码：

public void openAddNoteDialog() {

    MaterialAlertDialogBuilder builder = new MaterialAlertDialogBuilder(MainActivity.this, R.style.dialogBoxTheme);
    builder.setTitle("Add note");
    builder.setBackground(getResources().getDrawable(R.drawable.dialog_box, null));
    builder.setIcon(R.drawable.ic_add_note);
    builder.setView(R.layout.addnote_dialog);
    builder.setPositiveButton("Add", ((dialogInterface, i) -> handleAddNote()));
    builder.setNegativeButton("Cancel", (dialogInterface, i) -> dialogInterface.dismiss());
    builder.show();

}

这是对话框中的布局：

<com.google.android.material.textfield.TextInputLayout
    android:id="@+id/notenameFLD"
    style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
    android:layout_width="260dp"
    android:layout_height="90dp"
    android:layout_gravity="center"
    android:layout_marginTop="25dp"
    android:hint="@string/notename"
    android:textColorHint="@color/white"
    app:boxStrokeColor="@color/white"
    app:counterEnabled="true"
    app:counterMaxLength="20"
    app:counterTextColor="@color/white"
    app:helperTextTextColor="@color/white"
    app:hintTextColor="@color/white">

    <com.google.android.material.textfield.TextInputEditText
        android:id="@+id/notenameEDITFLD"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:fontFamily="@font/opensans_regular"
        android:maxLength="20"
        android:textColor="@color/white"
        android:textSize="20sp" />
</com.google.android.material.textfield.TextInputLayout>

<com.google.android.material.textfield.TextInputLayout
    android:id="@+id/notecontentFLD"
    style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
    android:layout_width="260dp"
    android:layout_height="90dp"
    android:layout_gravity="center"
    android:layout_marginBottom="25dp"
    android:hint="@string/notecontent"
    android:textColorHint="@color/white"
    app:boxStrokeColor="@color/white"
    app:counterEnabled="true"
    app:counterMaxLength="250"
    app:counterTextColor="@color/white"
    app:helperTextTextColor="@color/white"
    app:hintTextColor="@color/white">

    <com.google.android.material.textfield.TextInputEditText
        android:id="@+id/notecontentEDITFLD"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:fontFamily="@font/opensans_regular"
        android:maxLength="250"
        android:textColor="@color/white"
        android:textSize="20sp" />
</com.google.android.material.textfield.TextInputLayout>

现在，我正尝试在名为 handleAddNote() 的其他函数中获取这些输入字段的值。

final TextInputEditText noteNameFLD = findViewById(R.id.notenameEDITFLD);
final TextInputEditText noteContentFLD = findViewById(R.id.notecontentEDITFLD);

问题是，当我尝试将这些输入字段的值作为字符串获取时，它们 return 什么也没有。这里有什么问题？这是因为 findViewById() 找不到字段，因为它们位于警报对话框内，而不是实际 activity?

Ps。抱歉，如果这令人困惑，我可以根据需要添加更多信息。

Answer 1

Is this because the findViewById() can't find the fields as they are inside of the alert dialog box and not in the actual activity?

是的，您是对的 :) 您需要将它们显示在您为 dialogBuilder 设置的视图中。将您设置对话框视图的方式更改为：

final View dialogView = LayoutInflater.from(context).inflate(R.layout. addnote_dialog, null);
alertDialogBuilder.setView(dialogView);

然后，您可以使用 dialogView.findViewById() 查找视图。

如何获取Android中material对话框输入框的值？

How to get value of material dialog box input field in Android?

java

xml

android

material-components-android