Android获取TextView行数方法getLineCount()返回值为0
项目中遇到当TextView显示的数据不超过3行的时候,不显示下面的展开按钮,这时候就必须要获取到此时TextView的行数,查看api发现了getLineCount()方法,当我兴高采烈地使用时,却放心返回值总为空,后来查谷歌才发现说是要先把TextView完全画出来,才能获取行数,并说解决方法就是开启异步去获取,下面是具体的方法:private class MyOpenTask extends AsyncTask<Integer, Integer, Integer> { private int[] location = new int[2]; @Override protected void onCancelled() { super.onCancelled(); } public void start() { execute(0); } @Override protected Integer doInBackground(Integer... params) { return 1; } @Override protected void onPostExecute(Integer result) { super.onPostExecute(result); int linecount = mVideoDescription.getLineCount(); android.util.Log.e("MvDetail", "linecount1::"+linecount); if(linecount>3){ openTV.setVisibility(View.VISIBLE); openIV.setVisibility(View.VISIBLE); openTV.setText("展开全部"); mVideoDescription.setClickable(true); openFlag = false; }else{ openTV.setVisibility(View.GONE); openIV.setVisibility(View.GONE); mVideoDescription.setClickable(false); } } }
补充:移动开发 , Android ,