我要根据时间长度在vrpanorama视图中显示一组图像。时间到时，image1将更改为image2。但是我想使图像从image1过渡到image2变得平滑或无缝。我在过渡期间应用了Alpha动画，但显示不流畅。谁能帮我解决代码中的问题？
ublic class MainActivity extends AppCompatActivity {
private VrPanoramaView mVRPanoramaView;
public int counter=0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mVRPanoramaView = (VrPanoramaView) findViewById(R.id.vrPanoramaView);
AssetManager assetManager=getAssets(); // to reach asset
try {
final String[] images = assetManager.list("img");// to get all item in img folder.
animate(mVRPanoramaView, images,false);
}catch (IOException e) {
e.printStackTrace();
}
}
private void animate(final VrPanoramaView imageView, final String images[], final boolean forever) {
//imageView <-- The View which displays the images
//images[] <-- Holds R references to the images to display
//imageIndex <-- index of the first image to show in images[]
//forever <-- If equals true then after the last image it starts all over again with the first image resulting in an infinite loop. You have been warned.
int fadeInDuration = 2000; // Configure time values here //1000 millisecond= 1 second
int timeBetween = 3000;
int fadeOutDuration =2000;
//imageView.setVisibility(View.INVISIBLE); //Visible or invisible by default - this will apply when the animation ends
//imageView.setImageResource(images[imageIndex]);
VrPanoramaView.Options options = new VrPanoramaView.Options();
options.inputType = VrPanoramaView.Options.TYPE_MONO;
InputStream inputStream = null;
try {
inputStream = getAssets().open("img/" + images[counter]);
}catch (IOException e) {
e.printStackTrace();
}
Animation fadeIn = new AlphaAnimation(0f,1f); // 0 ,1 (fromAlpha, toAlpha)
fadeIn.setInterpolator(new DecelerateInterpolator()); // add this
fadeIn.setDuration(fadeInDuration);
Animation fadeOut = new AlphaAnimation(1f,0f); //1,0
fadeOut.setInterpolator(new AccelerateInterpolator(10000)); // and this
fadeOut.setStartOffset(fadeInDuration + timeBetween);
fadeOut.setDuration(fadeOutDuration);
AnimationSet animation = new AnimationSet(true); // change to false
animation.addAnimation(fadeIn);
animation.addAnimation(fadeOut);
animation.setRepeatCount(0);
imageView.setAnimation(animation);
imageView.loadImageFromBitmap(BitmapFactory.decodeStream(inputStream), options);
animation.setAnimationListener(new Animation.AnimationListener() {
public void onAnimationEnd(Animation animation) {
if (images.length > counter) {
animate(imageView, images,forever); //Calls itself until it gets to the end of the array
counter++;
}
else {
counter=0;
animate(imageView, images,forever); //Calls itself to start the animation all over again in a loop if forever = true
}
}
public void onAnimationRepeat(Animation animation) {
// TODO Auto-generated method stub
}
public void onAnimationStart(Animation animation) {
// TODO Auto-generated method stub
}
});
}
@Override
protected void onPause() {
super.onPause();
mVRPanoramaView.pauseRendering();
}
@Override
protected void onResume() {
super.onResume();
mVRPanoramaView.resumeRendering();
}
@Override
protected void onDestroy() {
mVRPanoramaView.shutdown();
super.onDestroy();
}
}