blocks|key|4276067|text|你看过API+Demos+>+App+>+Notifications+>+Status+Bar吗？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4276068|如果字符串选项的数量有限(如Smileys)，则可以为每个字符串创建可绘制的内容。|4276069|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Have you looked at the API Demos > App > Notifications > Status Bar?

If you have limited number of String options (like Smileys) you can create drawables for each of those Strings.

blocks|key|2866401|text|Short:不，你不能。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2866402|Long:通知需要图标的R.drawable.something，您不能在运行时创建它。|offset|length|style|CODE|2866403|entityMap^0|0|C|K|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

Short: No, you can't.

Long: The notification needs a <code>R.drawable.something</code> for the icon and you can't create it on runtime.

blocks|key|950782|text|您可以创建自己的自定义可绘制组件，其工作方式与textview小部件类似，只是它是一个可绘制组件，而不是视图。textview类只是包含文本的drawable的容器。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|950783|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

you can make your own custom drawable that would work just like the textview widget except it is a drawable instead of a view. The textview class is just a container for the drawable that contains the text.

blocks|key|953178|text|不，你不能，我想你可以使用和这里一样的方法：Combine+image+and+text+to+drawable，但是你不能，因为通知接受一个可绘制的id，而不是一个可绘制的对象。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|953179|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/6691818/how-to-create-drawable-containing-image-as-background-and-text-over-it^0|M|Y|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

No you can not, I thought you could use the same method as here: <a href="https://stackoverflow.com/questions/6691818/how-to-create-drawable-containing-image-as-background-and-text-over-it">Combine image and text to drawable</a>, but you can't, as the notification takes a drawable id, not a drawable object.

blocks|key|1695462|text|+++public+Drawable+getDrawable(String+bitmapUrl)+{
++++++try+{
++++++++URL+url+=+new+URL(bitmapUrl);
++++++++Drawable+d+=new+BitmapDrawable(BitmapFactory.decodeStream(url.openConnection().getInputStream()));
++++++++return+d;+
++++++}
++++++catch(Exception+ex)+{return+null;}
++++}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1695463|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code> public Drawable getDrawable(String bitmapUrl) {
 try {
 URL url = new URL(bitmapUrl);
 Drawable d =new BitmapDrawable(BitmapFactory.decodeStream(url.openConnection().getInputStream()));
 return d; 
 }
 catch(Exception ex) {return null;}
 }
</code></pre>

blocks|key|2866529|text|我使用了一种变通方法，它对我来说工作正常。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2866530|首先我将字符串转换为位图，然后将其转换为可绘制的，代码如下：|2866531|byte+[]+encodeByte=Base64.decode(":",Base64.DEFAULT);
Bitmap+bitmap=BitmapFactory.decodeByteArray(encodeByte,+0,+encodeByte.length);++++++
Drawable+d+=+new+BitmapDrawable(bitmap);|code-block|syntax|javascript|2866532|希望它能帮上忙！|2866533|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

I have used a workaround and it worked properly for me.

First i convert the string to bitmap and then convert it to a drawable, here is the code:

<pre><code>byte [] encodeByte=Base64.decode(":",Base64.DEFAULT);
Bitmap bitmap=BitmapFactory.decodeByteArray(encodeByte, 0, encodeByte.length); 
Drawable d = new BitmapDrawable(bitmap);
</code></pre>

Hope it helps!

blocks|key|2866535|text|try++{

++++InputStream+inputStream+=+new+URL(Your+imageWebAddress).openStream();

++++drawable+=+Drawable.createFromStream(inputStream,+null);
++++inputStream.close();
++}
++catch+(MalformedURLException+ex)+{+}
++catch+(IOException+ex)+{+}
++layout.setBackground(drawable);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|2866536|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>try {

 InputStream inputStream = new URL(Your imageWebAddress).openStream();

 drawable = Drawable.createFromStream(inputStream, null);
 inputStream.close();
 }
 catch (MalformedURLException ex) { }
 catch (IOException ex) { }
 layout.setBackground(drawable);
</code></pre>

blocks|key|4276246|text|(我知道这并没有完全回答OP的问题，但是这个标题让我来到了这里，因为它相当概括。)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4276247|在闲逛了一会儿之后，我想出了这个解决方案。它相当混乱，也许可以改进，但它是有效的。|4276248|在当前形式中，该函数接受它传递的字符串的第一个字母和该字符串的唯一ID。该ID仅用于背景颜色的生成和记忆，因此如果您要使用稳定的颜色，则可以将其删除。|4276249|我这样做是为了为没有保存图像的联系人生成默认图像，但它应该很容易适应。它也会返回一个InputStream，而不是Drawable，但是您可以在绘制之后返回bitmap，或者使用Drawable.createFromStream()。|offset|length|style|CODE|4276250|private+static+InputStream+returnDefaultContact(Context+context,+String+name,+long+id)+{
++++Paint+textPaint+=+new+Paint();
++++textPaint.setColor(Color.WHITE);
++++textPaint.setTextAlign(Paint.Align.CENTER);
++++textPaint.setTextSize(110);

++++int+color+=+PreferenceManager.getDefaultSharedPreferences(context).getInt("contact_by_id_"+%2B+id,+0);

++++if+(color+==+0)+{
++++++++int+colorValue1+=+(int)((56+%2B+Math.random()+*+200));
++++++++int+colorValue2+=+(int)((56+%2B+Math.random()+*+200));
++++++++int+colorValue3+=+(int)((56+%2B+Math.random()+*+200));

++++++++color+=+Color.rgb(colorValue1,+colorValue2,+colorValue3);

++++++++PreferenceManager.getDefaultSharedPreferences(context).edit().putInt("contact_by_id_"+%2B+id,+color).apply();
++++}

++++Paint+backgroundPaint+=+new+Paint();
++++backgroundPaint.setColor(color);

++++Bitmap+bitmap+=+Bitmap.createBitmap(120,+120,+Bitmap.Config.ARGB_8888);
++++Canvas+canvas+=+new+Canvas(bitmap);

++++canvas.drawCircle(canvas.getWidth()+/+2,+canvas.getHeight()+/+2,+canvas.getHeight()+/+2,+backgroundPaint);

++++int+xPos+=+(canvas.getWidth()+/+2);
++++int+yPos+=+(int)+((canvas.getHeight()+/+2)+-+((textPaint.descent()+%2B+textPaint.ascent())+/+2))+;

++++canvas.drawText(name.substring(0,+1),+xPos,+yPos,+textPaint);

++++ByteArrayOutputStream+stream+=+new+ByteArrayOutputStream();
++++bitmap.compress(Bitmap.CompressFormat.JPEG,+100,+stream);
++++byte[]+imageInByte+=+stream.toByteArray();

++++return+new+ByteArrayInputStream(imageInByte);
}|code-block|syntax|javascript|4276251|entityMap^0|0|0|0|26|6|2H|R|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|U|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|V|8|@$H|W|I|X|J|K]|$H|Y|I|Z|J|K]]|9|@]|A|$]]|$1|L|3|M|5|N|7|10|8|@]|9|@]|A|$O|P]]|$1|Q|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|R|$]]

(I know this doesn't answer the OP's question fully, but the title got me here since it's pretty general.)

After fiddling around a bit, I've come up with this solution. It's pretty messy and could probably be improved, but it works.

In its current form, the function takes the first letter of the String it's passed and a unique ID for that String. The ID is only used for background color generation and remembering it, so it can be removed if you're going to use a steady color.

I made this to generate default images for contacts that don't have images saved, but it should be easy to adapt. It also happens to return an InputStream instead of a Drawable, but you can either just return <code>bitmap</code> after drawing to it, or use <code>Drawable.createFromStream()</code>.

<pre><code>private static InputStream returnDefaultContact(Context context, String name, long id) {
 Paint textPaint = new Paint();
 textPaint.setColor(Color.WHITE);
 textPaint.setTextAlign(Paint.Align.CENTER);
 textPaint.setTextSize(110);

 int color = PreferenceManager.getDefaultSharedPreferences(context).getInt("contact_by_id_" + id, 0);

 if (color == 0) {
 int colorValue1 = (int)((56 + Math.random() * 200));
 int colorValue2 = (int)((56 + Math.random() * 200));
 int colorValue3 = (int)((56 + Math.random() * 200));

 color = Color.rgb(colorValue1, colorValue2, colorValue3);

 PreferenceManager.getDefaultSharedPreferences(context).edit().putInt("contact_by_id_" + id, color).apply();
 }

 Paint backgroundPaint = new Paint();
 backgroundPaint.setColor(color);

 Bitmap bitmap = Bitmap.createBitmap(120, 120, Bitmap.Config.ARGB_8888);
 Canvas canvas = new Canvas(bitmap);

 canvas.drawCircle(canvas.getWidth() / 2, canvas.getHeight() / 2, canvas.getHeight() / 2, backgroundPaint);

 int xPos = (canvas.getWidth() / 2);
 int yPos = (int) ((canvas.getHeight() / 2) - ((textPaint.descent() + textPaint.ascent()) / 2)) ;

 canvas.drawText(name.substring(0, 1), xPos, yPos, textPaint);

 ByteArrayOutputStream stream = new ByteArrayOutputStream();
 bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
 byte[] imageInByte = stream.toByteArray();

 return new ByteArrayInputStream(imageInByte);
}
</code></pre>

I want to raise a notification showing an icon in the status bar - so far so good, but actually I would like this icon to be a 3 character String.

So my question is: Is there a way to convert my String into a <code>Drawable</code> to display it as Icon in the status bar?

EDIT: I recently found an app which does something similar - Battery Indicator

It shows the current battery level as notification icon in the status bar - I wonder if it really uses different 100 images

<img src="https://i.stack.imgur.com/NxUia.png" alt="Screenshot">

Convert String to Drawable

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我想提出一个通知，在状态栏中显示一个图标-到目前为止还不错，但实际上我希望这个图标是一个3个字符的字符串。所以我的问题是:有没有办法将我的字符串转换成一个图标，以便在状态栏中显示为Drawable？编辑:我最近发现了一个类似功能的应用程序--电池指示器它在状态栏中以通知图标的形式显示当前电池电量-我想知道它是否真的使用...

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