android - 使用 TextView 显示字符

Question

我需要在 TextView 中显示 songtitle2.get(i).charAt(0)。我已经用歌曲名称填充了 ListView ，并且我想在每次歌曲名称第一个字母更改时放置分隔符。

adapter = new ArrayAdapter<String>(this,R.layout.song,songtitle);

setListAdapter(adapter);

然后我调用这个方法来获取分隔符

private void alphebetdividers(ArrayList<String> songtitle2) {
    // TODO Auto-generated method stub
    dividerss = (TextView)findViewById(R.layout.song);
    int i = 0;
    int j = 0;
    while( j < songtitle.size()-1){
            if(songtitle2.get(i).charAt(0) == songtitle2.get(i+1).charAt(0)){
                Toast.makeText(getApplication(), songtitle2.get(i).charAt(0) + "== " + songtitle2.get(i+1).charAt(0), Toast.LENGTH_LONG).show();
            }else{


                      //////DISPLAY CHAR WITH TEXTVIEW//////
            }
      j++;
      i++;

}
}           

Answer 1

只需将 char 转换为 String 即可:

String songName = 'My Song Name'
char my_char = songName.chatAt(0);
String newString = new String(char);

或者只获取子字符串:

String songName = 'My Song Name'
String newString = songName.subString(0,1);

然后在 textview 上设置标签:

textView.setText(newString);