EditText可以通过layer-list来绘制背景:
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape android:shape="rectangle" //框为矩形
>
<solid android:color="#FFFFFF" /> //用白色来填充里面
<stroke //边框是1dp的线
android:width="1dp"
android:color="#AEAEAE"
/>
<corners android:radius="10dp"/> //边框的圆角的弧度
</shape>
</item>
</layer-list><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"
android:background="#FFFFFF"
>
<include
layout="@layout/title_list"
/>
<View
android:layout_below="@id/title"
android:id="@+id/line"
android:layout_width="fill_parent"
android:layout_height="2dip"
android:background="@drawable/rc_list_divider" />
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="150dp"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_centerInParent="true">
<EditText
android:id="@+id/custom_edittext"
android:layout_width="fill_parent"
android:layout_height="150dp" //跟parent height一致所以left_word_num可以在背景框里面
android:background="@drawable/reply_custom_message_edit_background"
android:gravity="left|top"
android:hint="please inputsomething"
android:paddingBottom="24dp"
android:paddingLeft="12dp"
android:paddingRight="12dp"
android:paddingTop="17dp"
android:textColor="#000000"
android:textColorHint="#AEAEAE"
android:textSize="20sp" />
<TextView
android:id="@+id/other_char_hint"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@id/custom_edittext"
android:layout_alignParentBottom="true"
android:paddingBottom="10dp"
android:paddingLeft="12dp"
android:text="0"
android:textColor="#AEAEAE"
android:textSize="14sp"
android:visibility="gone"></TextView>
<TextView
android:id="@+id/left_word_num"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:paddingBottom="10dp"
android:paddingRight="10dp"
android:text="200"
android:textColor="#000000"
android:textSize="14sp"></TextView>
</RelativeLayout>
</RelativeLayout>
private EditText mCustom_edittext;
private TextView left_word_num;
private static final int MAX_INPUT_NUM = 200;
private TextView other_char_hint;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.edittext);
mCustom_edittext = (EditText)findViewById(R.id.custom_edittext);
other_char_hint = (TextView)findViewById(R.id.other_char_hint);
other_char_hint.setText("only enlish accepted");
left_word_num = (TextView) findViewById(R.id.left_word_num);
mCustom_edittext.addTextChangedListener(new TextWatcher() {
private CharSequence temp;
private int selectionStart;
private int selectionEnd;
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
temp = s;
}
@Override
public void afterTextChanged(Editable s) {
selectionStart = mCustom_edittext.getSelectionStart();
selectionEnd = mCustom_edittext.getSelectionEnd();
String lastword = s.toString().trim();
if (lastword.length() > 0) {
lastword = lastword.substring(lastword.length() - 1, lastword.length());
if(!isContentValid(temp.toString())) {
other_char_hint.setVisibility(View.VISIBLE);
for(int i=0;i < temp.toString().length();i++) {
String temp1 = temp.toString().substring(i, i+1);
if(!isInputValid(temp1)) {
//使用setSpan使EditText字底下画黑线
s.setSpan(new UnderlineSpan(), i, i+1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
}else{
other_char_hint.setVisibility(View.GONE);
}
}else{
other_char_hint.setVisibility(View.GONE);
}
left_word_num.setText(String.valueOf(MAX_INPUT_NUM - temp.length()));
}
});
}
private boolean isContentValid(String content) {
for(int i=0;i < content.length(); i++) {
String value = content.substring(i,i+1);
if(!isInputValid(value)) {
return false;
}
}
return true;
}
private boolean isInputValid(String s) {
byte[] ch_array = s.getBytes();
if (ch_array.length == 1) {
return true;
} else {
return false;
}
}
自定义绘制android EditText的背景，定义EditText文字的显示样式,布布扣,bubuko.com
自定义绘制android EditText的背景，定义EditText文字的显示样式
原文地址：http://blog.csdn.net/baidu_nod/article/details/37591445
