android中TextView 添加ClickableSpan后点击选中文字背景问题

  http://www.cnblogs.com/sxzheng/p/4245873.html

TextView中的setHighlightColor(int color)用于设置选中文字背景色高亮显示。

比如以下：

public class MainActivity extends ActionBarActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FrameLayout frameLayout = new FrameLayout(this);
setContentView(frameLayout);
frameLayout.setId(R.id.container);
if (savedInstanceState == null) {
getSupportFragmentManager().beginTransaction()
.add(R.id.container, new PlaceholderFragment())
.commit();
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main, container, false);
return rootView;
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
TextView textView = (TextView) view.findViewById(R.id.textview);
String str = "Click me!";
String txt = str + "Hello world!";
SpannableString spannableString = new SpannableString(txt);
ClickableSpan clickableSpan = new ClickableSpan() {
@Override
public void onClick(View widget) {
//Do something.
if(isAdded()) {
Toast.makeText(getActivity(), "You have clicked!", Toast.LENGTH_LONG).show();
//						avoidHintColor(widget);
}
}
@Override
public void updateDrawState(@NonNull TextPaint ds) {
super.updateDrawState(ds);
ds.setColor(getResources().getColor(android.R.color.holo_red_dark));
ds.setUnderlineText(false);
ds.clearShadowLayer();
}
};
spannableString.setSpan(clickableSpan,0,str.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
textView.setText(spannableString);
textView.setMovementMethod(LinkMovementMethod.getInstance());
}
private void avoidHintColor(View view){
if(view instanceof TextView)
((TextView)view).setHighlightColor(getResources().getColor(android.R.color.transparent));
}
}
}

会出现文字选中出现淡绿色的背景色现象。如下图1.1。ds.setColor()设定的是span超链接的文本颜色，而不是点击后的颜色，点击后的背景颜色(HighLightColor)属于TextView的属性，Android4.0以上默认是淡绿色，低版本的是黄色。

解决方法就是通过

((TextView)view).setHighlightColor(getResources().getColor(android.R.color.transparent));方法重新设置文字背景为透明色。

修改后的结果如图1.2。

图1.1：



图1.2：