Android - 文字阴影？
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Android - shadow on text?
提问by Grendizer
I am wondering how to add shadow on text in android?
我想知道如何在android中的文本上添加阴影？
I have the following code which is applied on a bitmap and I wanted to be shadowed...
我有以下代码应用于位图，我想被阴影......
paint.setColor(Color.BLACK);
paint.setTextSize(55);
paint.setFakeBoldText(false);
paint.setShadowLayer(1, 0, 0, Color.BLACK); //This only shadows my whole view...
回答by Jim Schubert
You should be able to add the style, like this (taken from source code for Ringdroid):
您应该能够添加样式，如下所示（取自 Ringdroid 的源代码）：
<style name="AudioFileInfoOverlayText">
<item name="android:paddingLeft">4px</item>
<item name="android:paddingBottom">4px</item>
<item name="android:textColor">#ffffffff</item>
<item name="android:textSize">12sp</item>
<item name="android:shadowColor">#000000</item>
<item name="android:shadowDx">1</item>
<item name="android:shadowDy">1</item>
<item name="android:shadowRadius">1</item>
</style>
And in your layout, use the style like this:
在你的布局中，使用这样的样式：
<TextView android:id="@+id/info"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
style="@style/AudioFileInfoOverlayText"
android:gravity="center" />
Edit: the source code can be viewed here: https://github.com/google/ringdroid
编辑：源代码可以在这里查看：https: //github.com/google/ringdroid
Edit2: To set this style programmatically, you'd do something like this (modified from this exampleto match ringdroid's resources from above)
Edit2：要以编程方式设置此样式，您可以执行以下操作（从本示例修改以匹配上面的 ringdroid 资源）
TextView infoTextView = (TextView) findViewById(R.id.info);
infoTextView.setTextAppearance(getApplicationContext(),
R.style.AudioFileInfoOverlayText);
The signature for setTextAppearanceis
的签名setTextAppearance是
public void setTextAppearance (Context context, int resid)
Since: API Level 1
Sets the text color, size, style, hint color, and highlight color from the specified TextAppearance resource.
public void setTextAppearance（上下文上下文，int resid）
从：API 级别 1
设置来自指定 TextAppearance 资源的文本颜色、大小、样式、提示颜色和突出显示颜色。
回答by codeFood
You can do both in code and XML. Only 4 basic things to be set.
您可以在代码和 XML 中进行。只需要设置 4 个基本的东西。
- shadow color
- Shadow Dx - it specifies the X-axis offset of shadow. You can give -/+ values, where -Dx draws a shadow on the left of text and +Dx on the right
- shadow Dy - it specifies the Y-axis offset of shadow. -Dy specifies a shadow above the text and +Dy specifies below the text.
- shadow radius - specifies how much the shadow should be blurred at the edges. Provide a small value if shadow needs to be prominent. Else otherwise.
- 阴影颜色
- Shadow Dx - 它指定阴影的 X 轴偏移。您可以给出 -/+ 值，其中 -Dx 在文本左侧绘制阴影，在右侧绘制 +Dx
- shadow Dy - 它指定阴影的 Y 轴偏移。-Dy 指定文本上方的阴影，+Dy 指定文本下方的阴影。
- 阴影半径 - 指定阴影应在边缘模糊的程度。如果阴影需要突出，请提供一个小的值。否则否则。
e.g.
例如
android:shadowColor="@color/text_shadow_color"
android:shadowDx="-2"
android:shadowDy="2"
android:shadowRadius="0.01"
This draws a prominent shadow on left-lower side of text. In code, you can add something like this;
这会在文本的左下侧绘制一个突出的阴影。在代码中，你可以添加这样的东西；
TextView item = new TextView(getApplicationContext());
item.setText(R.string.text);
item.setTextColor(getResources().getColor(R.color.general_text_color));
item.setShadowLayer(0.01f, -2, 2, getResources().getColor(R.color.text_shadow_color));
回答by Hoque MD Zahidul
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" android:padding="20dp" > <TextView android:id="@+id/textview" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:shadowColor="#000" android:shadowDx="0" android:shadowDy="0" android:shadowRadius="50" android:text="Text Shadow Example1" android:textColor="#FBFBFB" android:textSize="28dp" android:textStyle="bold" /> <TextView android:id="@+id/textview2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:text="Text Shadow Example2" android:textColor="#FBFBFB" android:textSize="28dp" android:textStyle="bold" /> </LinearLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" android:padding="20dp" > <TextView android:id="@+id/textview" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:shadowColor="#000" android:shadowDx="0" android:shadowDy="0" android:shadowRadius="50" android:text="Text Shadow Example1" android:textColor="#FBFBFB" android:textSize="28dp" android:textStyle="bold" /> <TextView android:id="@+id/textview2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center_horizontal" android:text="Text Shadow Example2" android:textColor="#FBFBFB" android:textSize="28dp" android:textStyle="bold" /> </LinearLayout>
In the above XML layout code, the textview1 is given with Shadow effect in the layout. below are the configuration items are
在上面的XML布局代码中，textview1在布局中被赋予了阴影效果。下面是配置项是
android:shadowDx– specifies the X-axis offset of shadow. You can give -/+ values, where -Dx draws a shadow on the left of text and +Dx on the right
android:shadowDx– 指定阴影的 X 轴偏移量。您可以给出 -/+ 值，其中 -Dx 在文本左侧绘制阴影，在右侧绘制 +Dx
android:shadowDy– it specifies the Y-axis offset of shadow. -Dy specifies a shadow above the text and +Dy specifies below the text.
android:shadowDy- 它指定阴影的 Y 轴偏移。-Dy 指定文本上方的阴影，+Dy 指定文本下方的阴影。
android:shadowRadius– specifies how much the shadow should be blurred at the edges. Provide a small value if shadow needs to be prominent. android:shadowColor – specifies the shadow color
android:shadowRadius– 指定阴影边缘的模糊程度。如果阴影需要突出，请提供一个小的值。android:shadowColor – 指定阴影颜色
Shadow Effect on Android TextView pragmatically
实用的 Android TextView 阴影效果
Use below code snippet to get the shadow effect on the second TextView pragmatically.
使用下面的代码片段以务实的方式在第二个 TextView 上获得阴影效果。
TextView textv = (TextView) findViewById(R.id.textview2); textv.setShadowLayer(30, 0, 0, Color.RED);
TextView textv = (TextView) findViewById(R.id.textview2); textv.setShadowLayer(30, 0, 0, Color.RED);
Output :
输出 ：
回答by Roc Boronat
If you want to achieve a shadow like the one that Android does in the Launcher, we're managing these values. They're useful if you want to create TextViews that will appear as a Widget, without a background.
如果您想实现像 Android 在 Launcher 中所做的那样的阴影，我们正在管理这些值。如果您想创建将显示为 Widget 且没有背景的 TextViews，它们会很有用。
android:shadowColor="#94000000"
android:shadowDy="2"
android:shadowRadius="4"
回答by fhucho
Draw 2 texts: one gray (it will be the shadow) and on top of it draw the second text (y coordinate 1px more then shadow text).
绘制 2 个文本：一个灰色（它将是阴影）并在其顶部绘制第二个文本（y 坐标比阴影文本多 1px）。
回答by Dan Alboteanu
<style name="WhiteTextWithShadow" parent="@android:style/TextAppearance">
<item name="android:shadowDx">1</item>
<item name="android:shadowDy">1</item>
<item name="android:shadowRadius">1</item>
<item name="android:shadowColor">@android:color/black</item>
<item name="android:textColor">@android:color/white</item>
</style>
then use as
然后用作
<TextView
android:id="@+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="15sp"
tools:text="Today, May 21"
style="@style/WhiteTextWithShadow"/>
