android - ListView 中的错误。当我滚动 ListView 时， ImageView 会自行更改。我的错误是什么？

Question

在我的getView方法中:

    public View getView(int index, View view, ViewGroup parent) {
        if (view == null) {
            LayoutInflater inflater = LayoutInflater.from(parent.getContext());
            view = inflater.inflate(R.layout.linha_historico_layout, parent, false);
    }

    DadosHistorico dadosHistorico = (DadosHistorico) getItem(index);

    TextView tvdata = (TextView) view.findViewById(R.id.tvData);
    tvdata.setText(dadosHistorico.getData());

    TextView ivstatushistorico = (TextView) view.findViewById(R.id.tvStatushistorico);
    ivstatushistorico.setText(dadosHistorico.getStatus());

    TextView tvInternetTitlo = (TextView) view.findViewById(R.id.tvInternetTitulo);
    tvInternetTitlo.setText(dadosHistorico.getInternet());

    TextView tvLigacaoTitulo = (TextView) view.findViewById(R.id.tvLigacaoTitulo);
    tvLigacaoTitulo.setText(dadosHistorico.getLigacao());

    TextView tvInternetDescricao = (TextView) view.findViewById(R.id.tvInternetDescricaoHistorico);
    tvInternetDescricao.setText(dadosHistorico.getInternetDescricao());

    TextView tvLigacaiDescricao = (TextView) view.findViewById(R.id.tvLigacaoDescricaoHistorico);
    tvLigacaiDescricao.setText(dadosHistorico.getLigacaoDescricao());

    TextView tvComentarioHistorico = (TextView)view.findViewById(R.id.tvComentarioHistorico);
    tvComentarioHistorico.setText(dadosHistorico.getComentario());

    final String comentario = tvComentarioHistorico.getText().toString();

    ImageView ivStatusLed = (ImageView) view.findViewById(R.id.ivStatusLe);


    if(ivstatushistorico.getText().equals("1")){
        ivStatusLed.setBackgroundResource(R.drawable.green_led);    
        ivStatusLed.setVisibility(View.VISIBLE);
    }    


    ImageView ibComentarioHistorico = (ImageView)view.findViewById(R.id.ibComentarioHistorico);

    if(comentario.equals("")){
        ibComentarioHistorico.setVisibility(View.INVISIBLE);
     }else{
        ibComentarioHistorico.setVisibility(View.VISIBLE);

     }


    ibComentarioHistorico.setOnClickListener(new OnClickListener() {    
        public void onClick(View v) {
            AlertDialog alertDialog = new AlertDialog.Builder(c).create();
            alertDialog.setTitle("Comentário");
            alertDialog.setMessage(comentario);
            alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int which) {
                }
            });

            alertDialog.show();


        }
    });


    return view;


    }

    public void addDados(String data, String status, String internet, String internetDescricao, String ligacao, String ligacaoDescricao, String comentario) {
        dados.add(new DadosHistorico(data, status, internet, internetDescricao, ligacao, ligacaoDescricao, comentario));

}
}

在这段代码中，我更改了列表中的 ImageView 。我从数据库接收到一些数据并更改 ImageView 。问题是，当我向下滚动 ListView 并向后滚动时， ImageView 不同，有时是 gream_led，有时 ibComentarioHistorico 消失。

Answer 1

添加一个else语句:

if(ivstatushistorico.getText().equals("1")){
    ivStatusLed.setBackgroundResource(R.drawable.green_led);    
    ivStatusLed.setVisibility(View.VISIBLE);
}
else {
    ivStatusLed.setBackgroundResource(R.drawable.your_default);    
    ivStatusLed.setVisibility(View.INVISIBLE); // or whatever the default is
}

View 会被重用，因此除非您告诉它在它不等于“1”时该怎么做，否则您将看到您所描述的行为。