Android对话框 - 圆角和透明度 [英] Android Dialog - Rounded Corners and Transparency

问题描述

我试图用圆角做一个定制的android对话框。我目前的尝试给了我这个结果。

I'm trying to make a custom android dialog with rounded corners. My current attempts have given me this result.

正如你所看到的，角落是圆形的，但它仍然保持白色的角落。

As you can see, the corners are rounded, but it leaves the white corner still intact.

以下是我在可绘制文件夹中添加的xml，以创建带有圆角的红色边框的蓝色对话框。

Below is the xml that I put in the drawable folder to create the blue dialog with the red border with the rounded corners.

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item> 
        <shape 
            android:shape="rectangle">
            <solid android:color="@color/transparent_black" />
            <corners android:radius="@dimen/border_radius"/>
        </shape>
    </item>   
    <item 
        android:left="@dimen/border_width" 
        android:right="@dimen/border_width"  
        android:top="@dimen/border_width"
        android:bottom="@dimen/border_width" >  

        <shape android:shape="rectangle"> 
            <solid android:color="@color/blue" />
            <corners android:radius="@dimen/border_radius"/>
        </shape>
    </item>    
</layer-list>

以下是对话框的布局。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
style="@style/fill"
android:orientation="vertical"
android:layout_margin="@dimen/spacing_normal"
android:padding="@dimen/spacing_normal"

android:background="@drawable/border_error_dialog" >

<RelativeLayout 
    style="@style/block"
    android:layout_gravity="center" >

    <ImageView
        android:id="@+id/imageView1"
        style="@style/wrap"
        android:layout_alignParentLeft="true"
        android:layout_centerHorizontal="true"
        android:contentDescription="@string/content_description_filler"
        android:src="@drawable/ic_launcher" />

    <TextView
        android:id="@+id/textView1"
        style="@style/error_text"
        android:layout_centerVertical="true"
        android:layout_toRightOf="@+id/imageView1"
        android:text="@string/error_login" />

</RelativeLayout>

<Button
    android:id="@+id/button1"
    style="@style/wrap"
    android:layout_gravity="center"
    android:text="Button" />

</LinearLayout>

下面是我创建对话框的活动。

And below is the Activity in which I create the dialog.

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button b1 = (Button) findViewById(R.id.button1);
    b1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {               
            AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(MainActivity.this);

            View child = getLayoutInflater().inflate(R.layout.dialog_custom_tom, null);
            alertDialogBuilder.setView(child);

            AlertDialog alertDialog = alertDialogBuilder.create();

            alertDialog.show();
        }
    });
}

推荐答案

是此处。使用Dialog而不是AlertDialog并设置透明背景：

dialog.getWindow（）。setBackgroundDrawableResource（android.R.color.transparent）;

因此您无法使用构建器。但是，如果您遵循最佳指导原则，您也可以在onCreateDialog回调DialogFragment中使用新的Dialog（）。

The only solution I have found is here. Use Dialog instead of AlertDialog and set transparent background:
dialog.getWindow().setBackgroundDrawableResource(android.R.color.transparent);
Therefore you can't use the builder. But you can use new Dialog() also in onCreateDialog callback of DialogFragment if you follow to best guidelines.

这也适用于Gingerbread。

This works also for Gingerbread.

除了可以使用xml元素< stroke>之外，可以将分层的drawable简化为一个形状为边界。

Besides the layered drawable can be simplified to one shape with xml element <stroke> for the border.

这篇关于Android对话框 - 圆角和透明度的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！