您好我正在android中创建一个自定义视图。我有一个LinerarLayout,我正在添加自定义视图。我设法以编程方式添加一个自定义视图,但如果我添加另一个它没有添加到布局中。我不我知道哪里出错了。我的主要活动。
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);
}
和我的自定义视图类
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。
答案 0 :(得分:2)
只是一个假设,不知道它是否有效。尝试在你的主要内容中执行此操作:
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);
有效吗?
答案 1 :(得分:0)
不会添加它但你看不到它。因为您的第一个视图将占用屏幕的整个空间。并且您的第二个将添加到您的第一个视图的下方,因此它将隐藏在您设备的可见部分中。我也遇到了同样的问题。我用两种布局解决了这个问题。请参阅here了解我的解决方案。
我认为这就是问题,这就是为什么我提供这个解决方案,如果不是让我知道..