Question

我创建了一个XML布局文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <EditText
        android:id="@+id/editText_dateStart"
        android:textColor="@color/colorPrimaryDark"
        android:textColorHint="@color/colorPrimary"
        android:layout_marginLeft="15dp"
        android:layout_marginRight="15dp"
        android:padding="20dp"
        android:hint="Start Date"
        android:inputType="date"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <EditText
        android:id="@+id/editText_dateEnd"
        android:textColor="@color/colorPrimaryDark"
        android:textColorHint="@color/colorPrimary"
        android:layout_marginLeft="15dp"
        android:layout_marginRight="15dp"
        android:padding="20dp"
        android:hint="End Date"
        android:inputType="date"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <Button
        android:id="@+id/button_ok"
        android:layout_marginLeft="15dp"
        android:layout_marginRight="15dp"
        android:layout_marginBottom="15dp"
        android:text="Ok"
        android:textColor="#ffffffff"
        android:background="@color/colorPrimaryDark"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

我想访问布局并从我写的类中的方法返回布局视图：

public class Utility {
 // 6 - LayoutInflate tool start
    public static View getViewOfLayout(Activity activity, int layoutId, int viewId) {
        LayoutInflater lin = activity.getLayoutInflater();
        View view = lin.inflate(layoutId, null);
        view = view.findViewById(viewId);
        return view;
    }
    // LayoutInflate tool end
}

我还希望能够访问Activity类中的视图：

Button button = (Button) Utility.getViewOfLayout(this, R.layout.datedialogbox, R.id.button_ok);
            button.setText("a");

当我运行上面的代码时，没有任何反应：文本没有从＆＃34; OK＆＃34;到＆＃34; a＆＃34;如预期的那样。

Answer 1

<强>更新：

更新您Utility.java课程，如下所示：

public class Utility {

    public static View getViewOfLayout(View layout, int viewId) {

        View view = layout.findViewById(viewId);
        return view;
    }
}

在Activity课程中：

..............
....................
LayoutInflater inflater = activity.getLayoutInflater();
View dialogLayout = inflater.inflate(R.layout.datedialogbox, null);

Button button = (Button) Utility.getViewOfLayout(dialogLayout, R.id.button_ok);

button.setText("BUTTON");
button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            // Do something...
        }
    });


......................
.............................

如果您的目的是创建Custom Dialog，那么您可以使用最少的代码轻松完成，如下所示：

            AlertDialog.Builder dialogBuilder;
            AlertDialog dialog;

            LayoutInflater inflater = activity.getLayoutInflater();
            View dialogLayout = inflater.inflate(R.layout.datedialogbox, null);

            // Views
            final EditText editTextDateStart = (EditText) dialogLayout.findViewById(R.id.editText_dateStart);
            final EditText editTextDateEnd = (EditText) dialogLayout.findViewById(R.id.editText_dateEnd);
            Button button = (Button) dialogLayout.findViewById(R.id.button_ok);

            button.setText("BUTTON"); // Change button text
            button.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {

                    String dateStart = editTextDateStart.getText().toString();
                    String dateEnd = editTextDateEnd.getText().toString();

                    // Do something
                }
            });

            dialogBuilder = new AlertDialog.Builder(activity);
            dialogBuilder.setView(dialogLayout);

            dialog = dialogBuilder.create();
            dialog.show();

如何访问布局视图？

1 个答案: