我想做的是水平移动背景并让它无限重复。
我尝试使用ImageSwitcher用动画来实现这种效果，但无法使其正常工作。这是我到目前为止的代码L
public class MainActivity extends AppCompatActivity implements ViewSwitcher.ViewFactory {
private Animation animSlide;
private ImageSwitcher image;
private ImageView imagePop;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
image = (ImageSwitcher) findViewById(R.id.image_switcher);
image.setFactory(this);
image.setImageResource(R.drawable.zc06);
Animation in = AnimationUtils.loadAnimation(this, android.R.anim.slide_in_left);
in.setDuration(10000);
Animation out = AnimationUtils.loadAnimation(this, android.R.anim.slide_out_right);
out.setDuration(10000);
image.setInAnimation(in);
image.setOutAnimation(out);
Timer timer = new Timer();
timer.scheduleAtFixedRate(new TimerTask() {
@Override
public void run() {
runOnUiThread(new Runnable() {
@Override
public void run() {
image.setImageResource(R.drawable.zc06);
}
});
}
}, 0, 10000);
Animation mZoomInAnimation = AnimationUtils.loadAnimation(this, R.anim.zoom_in);
Animation mZoomOutAnimation = AnimationUtils.loadAnimation(this, R.anim.zoom_out);
imagePop.startAnimation(mZoomInAnimation);
imagePop.startAnimation(mZoomOutAnimation);
}
@Override
public View makeView() {
ImageView myView = new ImageView(getApplicationContext());
return myView;
}
}
为什么你不尝试自己制作背景动画而不是使用ViewSwitcher？您所需要的只是一个简单的ValueAnimator:
首先添加两个相同的ImageViews到您的布局并为它们设置相同的背景图像：
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:id="@+id/background_one"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/background"/>
<ImageView
android:id="@+id/background_two"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@drawable/background"/>
</FrameLayout>
然后使用一个ValueAnimator为它们的translationX属性设置动画，但按它们的宽度偏移它们：
final ImageView backgroundOne = (ImageView) findViewById(R.id.background_one);
final ImageView backgroundTwo = (ImageView) findViewById(R.id.background_two);
final ValueAnimator animator = ValueAnimator.ofFloat(0.0f, 1.0f);
animator.setRepeatCount(ValueAnimator.INFINITE);
animator.setInterpolator(new LinearInterpolator());
animator.setDuration(10000L);
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
@Override
public void onAnimationUpdate(ValueAnimator animation) {
final float progress = (float) animation.getAnimatedValue();
final float width = backgroundOne.getWidth();
final float translationX = width * progress;
backgroundOne.setTranslationX(translationX);
backgroundTwo.setTranslationX(translationX - width);
}
});
animator.start();
这会产生一个连续的动画，无限地重复背景，并且应该看起来像这样：
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