【移动应用开发技术】Android笔记TextView和编辑框中添加图片,ImageSpan,SpannableStringBuilder用法

【移动应用开发技术】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: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

=

"sdfasd★fasljeojg★fad

falsdkjf★asjdkf

alsdj★foawpjf

sajfadsjf

ladjfa

ls";

SpannableStringBuilder

builder

=

new

SpannableStringBuilder(str);

String

flag

=

"★";

Pattern

pattern

=

Ppile(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:<RelativeLayout

xmlns:android="/apk/res/android"

xmlns:tools="/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: