將文本添加到自定義的TextView是不可見的

Question

您好我有定製textview.I問題我想添加文本到自定義的TextView編程，但是，它不會出現

MainActiviy：

public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     LinearLayout container1 = (LinearLayout) findViewById(R.id.container1); 
     LinearLayout container2 = (LinearLayout) findViewById(R.id.container2); 

     animView = new MyAnimationView(this);   
     animView.setMinimumWidth(200); 
     animView.setMinimumHeight(200); 
     animView.setText("XXXXx"); 
     animView.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT,1f)); 
     container1.addView(animView); 

和我的CustomView類的內部類mainactivity的是

public class MyAnimationView extends TextView implements ValueAnimator.AnimatorUpdateListener { 

    public final ArrayList<ShapeHolder> balls = new ArrayList<ShapeHolder>(); 
    public final ArrayList<RectHolder> Rects = new ArrayList<RectHolder>(); 
    AnimatorSet animation = null; 
    AnimatorSet ClickAnimation=null; 
    private float mDensity; 
    public Canvas can=new Canvas(); 
    public MyAnimationView(Context context) { 
     super(context); 
     mDensity = getContext().getResources().getDisplayMetrics().density; 
     ShapeHolder ball0 = addBall(50f, 200f); 
     RectHolder newline = addLine(40f,150f); 

    } 

    public void BeginAnimation(int pos) { 
     createSelectionAnimation(pos); 
     ClickAnimation.start(); 
    } 

    private void createSelectionAnimation(int pos) { 
     ClickAnimation=new AnimatorSet(); 
     Animation anim=AnimationUtils.loadAnimation(getBaseContext(), R.animator.scale); 
     if(pos==1) 
      animView.startAnimation(anim); 
     else if(pos==2) 
      animView1.startAnimation(anim); 
     else if(pos==3) 
      animView2.startAnimation(anim); 
     else 
      animView3.startAnimation(anim); 
     ObjectAnimator animalpha = ObjectAnimator.ofFloat(balls.get(0), "Alpha", 
       1.0f, 0.0f).setDuration(500); 
     ObjectAnimator animrect = ObjectAnimator.ofFloat(Rects.get(0), "Alpha", 
       1.0f, 0.0f).setDuration(500); 
     ClickAnimation.playTogether(animrect,animalpha); 
     animalpha.addUpdateListener(this); 
     animrect.addUpdateListener(this); 
    } 

    private void createAnimation() { 
     if (animation == null) { 
      ObjectAnimator anim1 = ObjectAnimator.ofFloat(balls.get(0), "y", 
      balls.get(0).getY(), balls.get(0).getY()-200f).setDuration(2000); 
      animation = new AnimatorSet(); 
      animation.playTogether(anim1); 
      anim1.addUpdateListener(this); 
     } 
    } 

    private ShapeHolder addBall(float x, float y) { 
     OvalShape circle = new OvalShape(); 
     circle.resize(90f * mDensity, 150f * mDensity); 
     ShapeDrawable drawable = new ShapeDrawable(circle); 
     ShapeHolder shapeHolder = new ShapeHolder(drawable); 
     shapeHolder.setX(x); 
     shapeHolder.setY(y); 
     int red = (int)(100 + Math.random() * 155); 
     int green = (int)(100 + Math.random() * 155); 
     int blue = (int)(100 + Math.random() * 155); 
     int color = 0xff000000 | red << 16 | green << 8 | blue; 
     Paint paint = drawable.getPaint(); //new Paint(Paint.ANTI_ALIAS_FLAG); 
     int darkColor = 0xff000000 | red/4 << 16 | green/4 << 8 | blue/4; 
     gradient = new RadialGradient(37.5f, 32.5f, 
       110f, color, darkColor, Shader.TileMode.CLAMP); 
     paint.setShader(gradient); 
     shapeHolder.setPaint(paint); 
     balls.add(shapeHolder); 
     return shapeHolder; 
    } 

    private RectHolder addLine(float x,float y) { 
     RectShape rect=new RectShape(); 
     rect.resize(10f * mDensity, 15f * mDensity); 
     ShapeDrawable drawable = new ShapeDrawable(rect); 
     RectHolder rectHolder = new RectHolder(drawable); 
     rectHolder.setX(x); 
     rectHolder.setY(y); 
     //can.drawLine(45, 150f,45f,160f, paint1); 
     int red = (int)(100 + Math.random() * 155); 
     int green = (int)(100 + Math.random() * 155); 
     int blue = (int)(100 + Math.random() * 155); 
     int color = 0xff000000 | red << 16 | green << 8 | blue; 
     Paint paint = drawable.getPaint(); //new Paint(Paint.ANTI_ALIAS_FLAG); 
     int darkColor = 0xff000000 | red/4 << 16 | green/4 << 8 | blue/4; 
     gradient = new RadialGradient(37.5f, 32.5f, 
       110f, color, darkColor, Shader.TileMode.CLAMP); 
     paint.setShader(gradient); 
     rectHolder.setPaint(paint);   
     Rects.add(rectHolder); 
     return rectHolder; 
    } 

    @Override 
    protected void onDraw(Canvas canvas) { 
     ShapeHolder shapeHolder = balls.get(0); 
     RectHolder rectHolder=Rects.get(0); 
     Paint paint =getPaint(); 
     paint.setTextSize(20f); 
     paint.setColor(Color.parseColor("#aaffee")); 
     paint.setStrokeWidth(10f); 
     paint.setShader(gradient); 
      canvas.save();    
      canvas.translate(shapeHolder.getX(), shapeHolder.getY());     
      shapeHolder.getShape().draw(canvas);  
      canvas.translate(rectHolder.getX(), rectHolder.getY());   
      rectHolder.getShape().draw(canvas); 
      canvas.restore(); 

     } 

    public void startAnimation() { 
     createAnimation(); 
     animation.start(); 
    } 

    public void onAnimationUpdate(ValueAnimator animation) { 
     invalidate(); 
    } 

} 

請幫我在這。

Answer 1

在MyAnimationView.onDraw（）方法中首先調用super.onDraw（）。