android - 无法以编程方式将自定义 View 添加到布局中

Question

您好，我正在 android 中创建一个自定义 View 。我有一个 LinerarLayout，我正在向其中添加自定义 View 。我设法以编程方式添加一个自定义 View ，但是如果我添加另一个，它不会被添加到布局中。我不知道不知道哪里出了问题。我的主要 Activity 。

   protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        LinearLayout container = (LinearLayout) findViewById(R.id.container);
        final MyAnimationView animView = new MyAnimationView(this); 
        container.addView(animView);
        final MyAnimationView animView1 = new MyAnimationView(this);        
        container.addView(animView1);       
    }

和我的自定义 View 类

public class MyAnimationView extends TextView implements ValueAnimator.AnimatorUpdateListener {

public final ArrayList<ShapeHolder> balls = new ArrayList<ShapeHolder>();
AnimatorSet animation = null;
private float mDensity;

public MyAnimationView(Context context) {
    super(context);        
    mDensity = getContext().getResources().getDisplayMetrics().density;
    ShapeHolder ball0 = addBall(75f, 400f);             

}
public MyAnimationView(Context context,float x,float y) {
    super(context);     
    mDensity = getContext().getResources().getDisplayMetrics().density;
    ShapeHolder ball0 = addBall(105f, 400f);         



}

private void createAnimation() {
    if (animation == null) {                
        ObjectAnimator anim0=ObjectAnimator.ofFloat(balls.get(0),"y",getHeight(),500f).setDuration(500); 
        animation = new AnimatorSet();
        animation.playTogether(anim0);              
        anim0.addUpdateListener(this);


  }
}

private ShapeHolder addBall(float x, float y) {
    OvalShape circle = new OvalShape();
    circle.resize(100f * mDensity, 100f * mDensity);
    ShapeDrawable drawable = new ShapeDrawable(circle);
    ShapeHolder shapeHolder = new ShapeHolder(drawable);
    shapeHolder.setX(x - 25f);
    shapeHolder.setY(y - 25f);
    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;
    RadialGradient gradient = new RadialGradient(37.5f, 12.5f,
            50f, color, darkColor, Shader.TileMode.CLAMP);
    paint.setShader(gradient);
    shapeHolder.setPaint(paint);
    balls.add(shapeHolder);
    return shapeHolder;
}

@Override
protected void onDraw(Canvas canvas) {
    for (int i = 0; i < balls.size(); ++i) {
        ShapeHolder shapeHolder = balls.get(i);
        canvas.save();
        canvas.translate(shapeHolder.getX(), shapeHolder.getY());
        shapeHolder.getShape().draw(canvas);
        canvas.restore();
    }
}

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

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

编辑:这是我的线性布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"     
android:id="@+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >

<Button
    android:id="@+id/startButton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Button" />   

任何帮助将不胜感激。

Answer 1

只是一个假设，不知道它是否有效。尝试在您的主目录中执行此操作:

    LinearLayout container = (LinearLayout) findViewById(R.id.container);

    final MyAnimationView animView = new MyAnimationView(this); 

    animView.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.
                              WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 1f));

    container.addView(animView);

    final MyAnimationView animView1 = new MyAnimationView(this); 

     animView1.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.
                                 WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 1f));

    container.addView(animView1);

有用吗？