自己定义的一个TextView怎么没显示出来

[YXTS122]

public class test_text extends TextView {
private String mText = "111",mNumber = "222";
private Paint mPaint;
private Rect mNumberRect;
public test_text(Context context) {
    super(context);
}

public test_text(Context context, AttributeSet attrs) {
    super(context,attrs);
}

public test_text(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context,attrs,defStyleAttr);
}

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    mPaint = new Paint();
    mPaint.setColor(Color.BLACK);
    mPaint.setStyle(Paint.Style.STROKE);
    canvas.drawRect(0, 0, getWidth(), getHeight(), mPaint);
    canvas.drawCircle(getWidth()/6*4, getHeight()/4*3,getHeight()/4,mPaint);
    mPaint.setTextSize(18);
    mPaint.getTextBounds(mNumber, 0, mNumber.length(), mNumberRect);
    canvas.drawText(mText, 2 ,getHeight()/5,mPaint);
    canvas.drawText(mNumber, (getWidth()/6*4)-(mNumberRect.width()/2), (getHeight()/4*3)-(mNumberRect.hashCode()/2), mPaint);
}
}  

[程序员一鸣]

继承于View，就会显示了，这个你只是在TextView的基础上扩展，显示你得重写方法

[YXTS122]

2楼能说清楚点吗，是重写哪个方法呀？

[顽固已死_有事烧纸]

你把super.onDraw(canvas);放后面试试

[YXTS122]

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        try {
        setContentView(R.layout.activity_main);
        }
    	catch (Exception e)
    	{
    		Toast.makeText(getApplication(),e.toString() ,Toast.LENGTH_LONG).show();
    	}
    }  

[YXTS122]