我一直在寻找,但找不到任何答案。我想要实现的是一个EditText,类似于ICS gmail应用程序的合成屏幕中的“To”字段。
这是描述我想要的图像:
我正在考虑扩展EditText
并实现我自己的自定义EditText
课程,但我不确定如何做到这一点,即使这是最好的解决方案。有什么想法吗?
答案 0 :(得分:7)
答案 1 :(得分:7)
改编了this answer的解决方案。插入逗号时自动分隔输入(可以调整分隔符)。创建一个ImageSpan和一个ClickableSpan(可以通过单击右侧部分删除条目)。
public class TagEditText extends EditText {
TextWatcher textWatcher;
String lastString;
String separator = ",";
public TagEditText(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
private void init() {
setMovementMethod(LinkMovementMethod.getInstance());
textWatcher = new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void afterTextChanged(Editable s) {
String thisString = s.toString();
if (thisString.length() > 0 && !thisString.equals(lastString)) {
format();
}
}
};
addTextChangedListener(textWatcher);
}
private void format() {
SpannableStringBuilder sb = new SpannableStringBuilder();
String fullString = getText().toString();
String[] strings = fullString.split(separator);
for (int i = 0; i < strings.length; i++) {
String string = strings[i];
sb.append(string);
if (fullString.charAt(fullString.length() - 1) != separator.charAt(0) && i == strings.length - 1) {
break;
}
BitmapDrawable bd = (BitmapDrawable) convertViewToDrawable(createTokenView(string));
bd.setBounds(0, 0, bd.getIntrinsicWidth(), bd.getIntrinsicHeight());
int startIdx = sb.length() - (string.length());
int endIdx = sb.length();
sb.setSpan(new ImageSpan(bd), startIdx, endIdx, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
MyClickableSpan myClickableSpan = new MyClickableSpan(startIdx, endIdx);
sb.setSpan(myClickableSpan, Math.max(endIdx-2, startIdx), endIdx, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
if (i < strings.length - 1) {
sb.append(separator);
} else if (fullString.charAt(fullString.length() - 1) == separator.charAt(0)) {
sb.append(separator);
}
}
lastString = sb.toString();
setText(sb);
setSelection(sb.length());
}
public View createTokenView(String text) {
LinearLayout l = new LinearLayout(getContext());
l.setOrientation(LinearLayout.HORIZONTAL);
l.setBackgroundResource(R.drawable.bordered_rectangle_rounded_corners);
TextView tv = new TextView(getContext());
l.addView(tv);
tv.setText(text);
tv.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 14);
ImageView im = new ImageView(getContext());
l.addView(im);
im.setImageResource(R.drawable.ic_cross_15dp);
im.setScaleType(ImageView.ScaleType.FIT_CENTER);
return l;
}
public Object convertViewToDrawable(View view) {
int spec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
view.measure(spec, spec);
view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
Bitmap b = Bitmap.createBitmap(view.getMeasuredWidth(), view.getMeasuredHeight(), Bitmap.Config.ARGB_8888);
Canvas c = new Canvas(b);
c.translate(-view.getScrollX(), -view.getScrollY());
view.draw(c);
view.setDrawingCacheEnabled(true);
Bitmap cacheBmp = view.getDrawingCache();
Bitmap viewBmp = cacheBmp.copy(Bitmap.Config.ARGB_8888, true);
view.destroyDrawingCache();
return new BitmapDrawable(getContext().getResources(), viewBmp);
}
private class MyClickableSpan extends ClickableSpan{
int startIdx;
int endIdx;
public MyClickableSpan(int startIdx, int endIdx) {
super();
this.startIdx = startIdx;
this.endIdx = endIdx;
}
@Override
public void onClick(View widget) {
String s = getText().toString();
String s1 = s.substring(0, startIdx);
String s2 = s.substring(Math.min(endIdx+1, s.length()-1), s.length() );
TagEditText.this.setText(s1 + s2);
}
}
}
R.drawable.bordered_rectangle_rounded_corners:
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<solid
android:color="@color/transparent"/>
<stroke android:width="1dp" android:color="#AAAAAA" />
<corners
android:radius="100dp" />
<padding
android:left="5dp"
android:top="5dp"
android:right="5dp"
android:bottom="5dp" />
</shape>
最后要添加的是“x-Button”的png。到目前为止效果很好,唯一的问题是长按删除键不起作用(如果有人知道如何使其工作,请随时发表评论)
答案 2 :(得分:4)
我无法找到一个好的解决方案,所以我建立自己的库来处理这个问题:TokenAutoComplete。这是一个基本的例子:
public class ContactsCompletionView extends TokenCompleteTextView {
public ContactsCompletionView(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected View getViewForObject(Object object) {
Person p = (Person)object;
LayoutInflater l = (LayoutInflater)getContext().getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
LinearLayout view = (LinearLayout)l.inflate(R.layout.contact_token, (ViewGroup)ContactsCompletionView.this.getParent(), false);
((TextView)view.findViewById(R.id.name)).setText(p.getName());
return view;
}
@Override
protected Object defaultObject(String completionText) {
//Stupid simple example of guessing if we have an email or not
int index = completionText.indexOf('@');
if (index == -1) {
return new Person(completionText, completionText.replace(" ", "") + "@example.com");
} else {
return new Person(completionText.substring(0, index), completionText);
}
}
}
contact_token的布局代码(您需要找到自己的x drawable)
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:background="@drawable/token_background">
<TextView android:id="@+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@android:color/white"
android:textSize="14sp"
android:text="Test Me"
android:padding="2dp" />
<ImageView
android:layout_height="10dp"
android:layout_width="10dp"
android:src="@drawable/x"
android:layout_gravity="center_vertical"
android:layout_marginLeft="3dp"
android:layout_marginRight="5dp" />
</LinearLayout>
令牌背景可绘制
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
<solid android:color="#ffafafaf" />
<corners
android:topLeftRadius="5dp"
android:bottomLeftRadius="5dp"
android:topRightRadius="5dp"
android:bottomRightRadius="5dp" />
</shape>
人物对象代码
public class Person implements Serializable {
private String name;
private String email;
public Person(String n, String e) { name = n; email = e; }
public String getName() { return name; }
public String getEmail() { return email; }
@Override
public String toString() { return name; }
}
示例活动
public class TokenActivity extends Activity {
ContactsCompletionView completionView;
Person[] people;
ArrayAdapter<Person> adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
people = new Person[]{
new Person("Marshall Weir", "marshall@example.com"),
new Person("Margaret Smith", "margaret@example.com"),
new Person("Max Jordan", "max@example.com"),
new Person("Meg Peterson", "meg@example.com"),
new Person("Amanda Johnson", "amanda@example.com"),
new Person("Terry Anderson", "terry@example.com")
};
adapter = new ArrayAdapter<Person>(this, android.R.layout.simple_list_item_1, people);
completionView = (ContactsCompletionView)findViewById(R.id.searchView);
completionView.setAdapter(adapter);
completionView.setTokenClickStyle(TokenCompleteTextView.TokenClickStyle.Delete);
}
}
布局代码
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.tokenautocomplete.ContactsCompletionView
android:id="@+id/searchView"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</RelativeLayout>