我有一个约束布局(alpha9),其中的视图遍布它,我有一个特殊的ImageView,我需要复制并添加更多类似的。 布局是这样的:
主要目的是在按下按钮时为这些“硬币”图像视图中的5个设置动画。我需要生成的imageViews将具有下面按钮后面的imageView的确切属性(具有相同的约束)
我试图做的是:
private ImageView generateCoin() {
ImageView coin = new ImageView(this);
constraintLayout.addView(coin,-1,originCoinImage.getLayoutParams());//originCoinImage is the imageView behind the button
coin.setImageResource(R.drawable.ic_coin);
coin.setScaleType(ImageView.ScaleType.FIT_XY);
coin.setVisibility(View.VISIBLE);
return coin;
}
它失败了。 编辑:它无法显示我想要的内容,有时它会在屏幕的左上方显示一个硬币,有时它不会显示任何东西,但无论如何,硬币数量增加(意味着动画)试图实际做某事,然后调用onAnimationFinished方法)
我用于动画库EasyAndroidAnimations
代码如下:
MainActivity.java
@OnClick(R.id.addCoin)
public void addCoin() {
// for (int x = 0 ; x < 5 ; x++){
final View newCoin = generateCoin();
sendCoin(newCoin, 300, new AnimationListener() {
@Override
public void onAnimationEnd(com.easyandroidanimations.library.Animation animation) {
incrementCoins();
constraintLayout.removeView(newCoin);
shakeCoin(targetCoinImage, 200, null);
}
});
// }
}
private void incrementCoins() {
coins++;
coinNumber.setText(String.valueOf(coins));
}
private void sendCoin(View coinView, long duration, AnimationListener listener) {
new TransferAnimation(coinView)
.setDestinationView(targetCoinImage)
.setDuration(duration)
.setInterpolator(new AccelerateDecelerateInterpolator())
.setListener(listener)
.animate();
}
private void shakeCoin(View coinView, long duration, AnimationListener listener) {
new ShakeAnimation(coinView)
.setDuration(duration)
.setShakeDistance(6f)
.setNumOfShakes(5)
.setListener(listener)
.animate();
}
activity_main.xml中
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="seaskyways.canvasanddrawtest.MainActivity">
<TextView
android:id="@+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:layout_marginTop="16dp"
android:text="Coins : "
android:textSize="30sp"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<TextView
android:id="@+id/coinNumber"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="16dp"
android:layout_marginLeft="8dp"
android:layout_marginRight="16dp"
android:layout_marginStart="8dp"
android:text="0"
android:textColor="@color/colorPrimary"
android:textSize="50sp"
android:textStyle="normal|bold"
app:layout_constraintBottom_toBottomOf="@+id/textView"
app:layout_constraintLeft_toRightOf="@+id/textView"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="@+id/textView" />
<ImageView
android:id="@+id/coinOrigin"
android:layout_width="50dp"
android:layout_height="50dp"
android:scaleType="fitXY"
app:layout_constraintBottom_toBottomOf="@+id/addCoin"
app:layout_constraintLeft_toLeftOf="@+id/addCoin"
app:layout_constraintTop_toTopOf="@+id/addCoin"
app:srcCompat="@drawable/ic_coin"
app:layout_constraintRight_toRightOf="@+id/addCoin" />
<ImageView
android:id="@+id/coinTarget"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:scaleType="fitXY"
app:layout_constraintBottom_toBottomOf="@+id/coinNumber"
app:layout_constraintLeft_toRightOf="@+id/coinNumber"
app:layout_constraintTop_toTopOf="@+id/coinNumber"
app:srcCompat="@drawable/ic_coin" />
<Button
android:id="@+id/addCoin"
android:layout_width="0dp"
android:layout_height="75dp"
android:layout_marginBottom="16dp"
android:layout_marginEnd="16dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:layout_marginStart="16dp"
android:text="Button"
android:textAlignment="center"
android:textSize="36sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent" />
</android.support.constraint.ConstraintLayout>
答案 0 :(得分:10)
ConstraintLayout.LayoutParams
缓存其参数,并与您使用它的小部件相关联,因此您不能简单地将一个小部件的layoutParams传递给另一个。
您必须为新对象生成新的layoutParams,并复制相应的字段。
例如,如果您有类似的内容:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/content_main"
android:layout_width="match_parent"
android:layout_height="match_parent">
<Button
android:text="Button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/button"
android:layout_marginTop="16dp"
app:layout_constraintTop_toTopOf="parent"
android:layout_marginStart="16dp"
app:layout_constraintLeft_toLeftOf="parent"
android:layout_marginLeft="16dp" />
</android.support.constraint.ConstraintLayout>
然后你可以这样做:
ConstraintLayout layout = (ConstraintLayout) findViewById(R.id.content_main);
ConstraintLayout.LayoutParams params =
(ConstraintLayout.LayoutParams) button.getLayoutParams();
Button anotherButton = new Button(this);
ConstraintLayout.LayoutParams newParams = new ConstraintLayout.LayoutParams(
ConstraintLayout.LayoutParams.WRAP_CONTENT,
ConstraintLayout.LayoutParams.WRAP_CONTENT);
newParams.leftToLeft = params.leftToLeft;
newParams.topToTop = params.topToTop;
newParams.leftMargin = params.leftMargin;
newParams.topMargin = params.topMargin;
layout.addView(anotherButton, -1, newParams);
这会使第二个按钮与XML中定义的按钮完全相同。