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 = 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:
<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:
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