旁边有文字的Android自定义按钮

Question

我正在尝试创建一个旁边带有文本的自定义按钮。我将有一个旁边带有 (x) 的项目列表，因此用户可以点击 (x) 删除该项目。像这样...

(x)项目 1 (x)项目 2 (x)项目 3

我有一个扩展按钮的类，但我不确定应该覆盖哪些方法，因为当我使用自定义类创建按钮时，它显示为普通按钮。这是我的代码。

public class LabelButton extends Button {
  private final Context context;

  private final String label;

  public LabelButton( Context context, String label ) {
    super( context );
    this.context = context;
    this.label = label;
  }

  public View getView( View convertView, ViewGroup parent ) {
    LayoutInflater inflater = (LayoutInflater) context.getSystemService( Context.LAYOUT_INFLATER_SERVICE );
    View labelView = inflater.inflate( R.layout.label, parent, false );
    TextView textView = (TextView) labelView.findViewById( R.id.label );
    Button button = (Button) labelView.findViewById( R.id.buttonCancel );
    textView.setText( "X" );
    return labelView;
  }

Answer 1

您应该使用 Attrs 参数覆盖 onDraw 方法和构造函数

 public LabelButton(Context context, AttributeSet attrs, int defStyle) {
             super(context, attrs, defStyle); 
              if (attrs != null) {
              // set your attrs
         }
        }

 @Override
protected synchronized void onDraw(Canvas canvas) {
     super.onDraw(canvas);
     Paint textPaint = new Paint();
     textPaint.setAntiAlias(true);
     textPaint.setColor(textColor);
     textPaint.setTextSize(textSize);
     Rect bounds = new Rect();       
     textPaint.getTextBounds(totalText, 0, totalText.length(), bounds);
     int x = getWidth() / 2 - bounds.centerX();
     int y = getHeight() / 2 - bounds.centerY();
     canvas.drawText(text, getLeft(), y, textPaint);// draw your text in coords
}

public synchronized void setText(String text) {
     if (text != null) {
         this.text = text;
     } else {
         this.text = "";
     }
     postInvalidate();
}