Android笔记:TextView和编辑框中添加图片,ImageSpan,SpannableStringBuilder用法
在TextView或者编辑框EditText中添加图片的方法，代码如下:
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
|
import
java.util.regex.Matcher;
import
java.util.regex.Pattern;
import
android.os.Bundle;
import
android.app.Activity;
import
android.text.Spannable;
import
android.text.SpannableStringBuilder;
import
android.text.style.ImageSpan;
import
android.widget.EditText;
import
android.widget.TextView;
public
class
MainActivity
extends
Activity
{
@Override
protected
void
onCreate(Bundle savedInstanceState)
{
super
.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView tv = (TextView) findViewById(R.id.tv);
String str =
"sdfasdfasljeojgfad falsdkjfasjdkf alsdjfoawpjf sajfadsjf ladjfa ls"
;
SpannableStringBuilder builder =
new
SpannableStringBuilder(str);
String flag =
""
;
Pattern pattern = Pattern.compile(flag);
Matcher matcher = pattern.matcher(str);
while
(matcher.find())
{
builder.setSpan(
new
ImageSpan(
this
, R.drawable.ic_launcher), matcher.start(), matcher.end(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
}
tv.setText(builder);
EditText ed = (EditText) findViewById(R.id.editText1);
ed.setText(builder);
}
}
|
布局文件代码如下:
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
<RelativeLayout xmlns:android=
"http://schemas.android.com/apk/res/android"
xmlns:tools=
"http://schemas.android.com/tools"
android:layout_width=
"match_parent"
android:layout_height=
"match_parent"
android:paddingBottom=
"@dimen/activity_vertical_margin"
android:paddingLeft=
"@dimen/activity_horizontal_margin"
android:paddingRight=
"@dimen/activity_horizontal_margin"
android:paddingTop=
"@dimen/activity_vertical_margin"
tools:context=
".MainActivity"
>
<TextView
android:id=
"@+id/tv"
android:layout_width=
"wrap_content"
android:layout_height=
"wrap_content"
android:text=
"@string/hello_world"
/>
<EditText
android:id=
"@+id/editText1"
android:layout_width=
"wrap_content"
android:layout_height=
"wrap_content"
android:layout_alignParentLeft=
"true"
android:layout_below=
"@+id/tv"
android:layout_marginTop=
"63dp"
android:ems=
"10"
>
<requestFocus />
</EditText>
</RelativeLayout>
|
效果图：
本文转自 glblong 51CTO博客，原文链接：http://blog.51cto.com/glblong/1548221，如需转载请自行联系原作者
