android-animation

问题 I'm new to android and I don't know a lot about android animation . I've a viewflipper and I want to animate between images inside it . This is the code : runnable = new Runnable() { public void run() { handler.postDelayed(runnable, 3000); imageViewFlipper.setInAnimation(fadeIn); imageViewFlipper.setOutAnimation(fadeOut); imageViewFlipper.showNext(); } }; handler = new Handler(); handler.postDelayed(runnable, 500); } The 2 animated file are not good , they animate very badly . I just need a

问题 I would like to apply a fade-in animation to an ImageView to create the effect that the image, which is loaded from a url, fades in when the download is completed. I know how to download an image from a url to an ImageView, like in this answer, and I know how to apply a fade-in animation to an imageView like here. This attempt Drawable d = ImageUtils.fetchDrawable("the url"); imageView.setImageDrawable(d); imageView.startAnimation(fadeInAnimation); results in a blink effect (see, not see,

问题 By using a repeating image like this, is it possible to create animation like this? 回答1: I figured it out MainActivity.java: public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); final int screenWidth = getScreenDimensions(this).x; final int waveImgWidth = getResources().getDrawable(R.drawable.wave).getIntrinsicWidth(); int animatedViewWidth = 0; while

问题 I am going to rotate the image in My app. All Works fine with the Rotation. But while i rotation animation get finish the Image wil return to its previous position. I want is to remain that image to that rotated state and not to get it back to its real state. So how to make it possible? To rotate image I am using below code: <?xml version="1.0" encoding="utf-8"?> <rotate xmlns:android="http://schemas.android.com/apk/res/android" android:pivotX="50%" android:pivotY="50%" android:fromDegrees="0

问题 Any way of adding ListView's bounce effect to regular scrollview? By bounce I mean the rubber band like effect when you hit the bottom of the list. 回答1: By the looks of things in the ScrollView API you should be able to override the onOverScrolled() method if you create a custom view that extends the ScrollView class. After doing a quick Google search I came across this link and it looks as if this is what you are trying to do... I do believe this method was added in Android 2.3.1 though so

问题 I'm using the wonderful framework NineOldAndroids, but I can't find anything to set the pivot on my animated views. Specifically, I'm trying to do a scaleX + scaleY animation with a pivot on the top-left edge, so pivotX = 0 and pivotY = 0. On Honeycomb and beyond I would just set myView.setPivotX(0) and myView.setPivotY(0) , but how to do it for pre-Honeycomb devices with NineOldAndroids? I tried the following: AnimatorSet set = new AnimatorSet(); set.playTogether( ObjectAnimator.ofFloat

问题 I'm writing my own image viewer that enables users to swipe left\right to see the next\previous image. I want to animate the image change according to the fling velocity. To detect a fling gesture and its velocity, I followed this basic gesture detection and did as the accepted answer suggested: public class SelectFilterActivity extends Activity implements OnClickListener { private static final int SWIPE_MIN_DISTANCE = 120; private static final int SWIPE_MAX_OFF_PATH = 250; private static

问题 In android, can we slide a fragment over another? For example, in the following image : There are two fragments. One is red colored, and the other blue colored. If the user presses his finger on the black colored arrow and drags it to the right, the red colored fragment also drags along with it, thereby covering the blue fragment. In the end, the red fragment covers the whole blue fragment. Also, if the user lifts his finger before the red fragment has been dragged onto less than half of the

问题 I have a project where I use a horizontal recycler view and I want to center one element. My implementation works, but not in every case check this GIF here: As you may note it scrolls correctly if I come from the left. If I come from the right it overscrolls a lot and I have no idea how to stop nor how to fix that. I striped my code to this example here: public class DemoActivity extends ActionBarActivity implements View.OnClickListener { private static final int JUMP_TO_LEFT = MyAdapter.NON

问题 What I Have I have an arrow image (like the left one). When the user clicks on it, it should rotate 180 degree with an animation and should look like the right one. What I Have Done private void rotate(float degree, final int toggleV) { final RotateAnimation rotateAnim = new RotateAnimation(0.0f, degree, RotateAnimation.RELATIVE_TO_SELF, 0.5f, RotateAnimation.RELATIVE_TO_SELF, 0.5f); rotateAnim.setDuration(500); toggle.startAnimation(rotateAnim); rotateAnim.setAnimationListener(new Animation