android - ScrollView 在警报对话框中不起作用

Question

不知何故， ScrollView 无法正常工作。显示的消息警报对话框非常大，所以我需要实现垂直滚动条。我试图从之前提出的问题中获取数据，但它没有解决我的问题，请帮忙。

我需要在按钮点击事件上显示警告对话框。

 benefits.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                AlertDialog ad = new AlertDialog.Builder(Panchgavya.this).create();
                ad.setCancelable(false); // This blocks the 'BACK' button
                ad.setMessage(getString(R.string.benefits));
                ad.setTitle("Benefits");
                ad.setButton("OK", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                    }
                });

                ad.show();
                TextView textView = (TextView) ad.findViewById(android.R.id.message);

                textView.setScroller(new Scroller(Panchgavya.this));
                textView.setVerticalScrollBarEnabled(true);
                textView.setMovementMethod(new ScrollingMovementMethod());


            }
        });

我的 XML 文件代码:

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout 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_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".Design.Panchgavya"
    android:orientation="vertical">

    <android.support.v7.widget.Toolbar
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:background="@color/Green"
        android:minHeight="?attr/actionBarSize"
        android:theme="@style/ThemeOverlay.AppCompat.ActionBar">

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="center"
            android:text="Panchgavya"
            android:textColor="@color/white"/>

      </android.support.v7.widget.Toolbar>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="6"
        android:orientation="vertical">
        <TextView
            android:layout_marginTop="10dp"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:ellipsize="end"
            android:text="@string/panchgavya"/>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="3"
        android:orientation="vertical">
        <TextView
            android:id="@+id/panchgavya_tv_cow_dung"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Cow Dung"
            android:textAppearance="@style/Base.TextAppearance.AppCompat.Medium"
            android:textStyle="bold"
            android:textColor="@color/black"/>
        <TextView
            android:id="@+id/panchgavya_tv_cow_urine"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="5dp"
            android:text="Cow Urine"
            android:textStyle="bold"
            android:textAppearance="@style/Base.TextAppearance.AppCompat.Medium"
            android:textColor="@color/black"/>
        <TextView
            android:id="@+id/panchgavya_tv_cow_milk"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="5dp"
            android:text="Cow Milk"
            android:textStyle="bold"
            android:textAppearance="@style/Base.TextAppearance.AppCompat.Medium"
            android:textColor="@color/black"/>
        <TextView
            android:id="@+id/panchgavya_tv_ghee"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="5dp"
            android:textAppearance="@style/Base.TextAppearance.AppCompat.Medium"
            android:text="Ghee"
            android:textStyle="bold"
            android:textColor="@color/black"/>
        <TextView
            android:id="@+id/panchgavya_tv_dahi"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginTop="5dp"
            android:textAppearance="@style/Base.TextAppearance.AppCompat.Medium"
            android:text="Dahi"
            android:textStyle="bold"
            android:textColor="@color/black"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1"
        android:orientation="vertical"
        android:scrollbars="vertical"
        android:scrollbarAlwaysDrawVerticalTrack="true">
    <Button
        android:id="@+id/panchgavya_btn_benefits"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="Benefits"
        android:background="@color/Green"
        android:textColor="@color/white"
        />
    </LinearLayout>


</LinearLayout>

Answer 1

您可以为对话框创建自定义布局并轻松设置任何属性。

根据您的要求，为您所需的对话框创建布局。将 android:scrollbars = "vertical" 放在布局内的 textView 中。和 textview.setMovementMethod(new ScrollingMovementMethod());。

您可以通过以下方法在您的设备上设置自定义布局。

 public void showDialog(Activity activity, String msg){
        final Dialog dialog = new Dialog(activity);
        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
        dialog.setCancelable(false);
        dialog.setContentView(R.layout.dialog);

        TextView text = (TextView) dialog.findViewById(R.id.text_dialog);
        text.setText(msg);

        Button dialogButton = (Button) dialog.findViewById(R.id.btn_dialog);
        dialogButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                dialog.dismiss();
            }
        });

        dialog.show();

    }