android中TextView 添加ClickableSpan后点击选中文字背景变色问题

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);if (savedInstanceState == null) {

            getSupportFragmentManager().beginTransaction()

                    .add(android.R.id.content, 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：