Android Studio动态按钮背景列表视图

Question

我遇到了一个问题，当我想在列表视图中设置不同的背景按钮。

public class ColorAdapter extends BaseAdapter{
private LayoutInflater inflater;
private Activity activity;
private String[] colors;
public ColorAdapter(Activity activity, String[] colors){
    this.activity=activity;
    this.colors=colors;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    if(inflater==null){
        inflater=(LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }
    if(convertView ==null){
        convertView=inflater.inflate(R.layout.color_layout,null);
    }
    Button button= (Button) convertView.findViewById(R.id.button);
    String thisColor = colors[position].toString();
    button.setText(thisColor);
    String attributeValue = button.getText().toString().toLowerCase();

    if(thisColor == "black"){
         button.setBackgroundColor(Color.BLACK);
    }
    return convertView;
}

}

它没有改变颜色。但是这段代码:String thisColor = colors[position].toString(); button.setText(thisColor);将文本设置为"黑色"。我错过了什么?

谢谢。

Answer 1

我已经更新了我的答案。

对于String，你需要使用String .equals("string_value");

的例子:

if(thisColor.equals("black")){
  //your code.
}

Answer 2

试试这个代码

   public class ColorAdapter extends BaseAdapter{
    private LayoutInflater inflater;
    private Activity activity;
    private int[] colors={Color.BLACK,Color.YELLOW,Color.RED,Color.GREEN};//pass this arrary through constructor
    public ColorAdapter(Activity activity){
        this.activity=activity;
    }
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        if(inflater==null){
            inflater=(LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        }
        if(convertView ==null){
            convertView=inflater.inflate(R.layout.color_layout,null);
        }
        Button button= (Button) convertView.findViewById(R.id.button);
        int thisColor = colors[position];
        button.setText(thisColor);
        String attributeValue = button.getText().toString().toLowerCase();
        button.setBackgroundColor(thisColor);
        return convertView;
    }
}