我用过画廊。图库的每个项目都占据屏幕的整个宽度。我还放置了一个按钮来翻转。当第一个项目显示在画廊中时，如果我单击翻转按钮，它不会显示翻转动画。但是，如果我滚动图库并转到另一个项目或再次返回第一个项目，则动画可以正常工作。谁能猜出问题出在哪里。
我用所选项目的位置调用方法flipView。动画的方法和类如下：
public void flipView(int position) {
applyRotation(0, 90, position);
isFrontShowing[position] = !isFrontShowing[position];
}
private void applyRotation(float start, float end, int position) {
// Find the center of image
final float centerX, centerY;
if(isFrontShowing[position] == true) {
centerX = detailsLayout[position].getMeasuredWidth() / 2.0f;
centerY = detailsLayout[position].getMeasuredHeight() / 2.0f;
detailsLayout[position].requestFocus();
detailsLayout[position].bringToFront();
} else {
centerX = scriptLayout[position].getMeasuredWidth() / 2.0f;
centerY = scriptLayout[position].getMeasuredHeight() / 2.0f;
scriptLayout[position].requestFocus();
scriptLayout[position].bringToFront();
}
final Rotate3dAnimation rotation =
new Rotate3dAnimation(start, end, centerX, centerY, 200.0f, true);
rotation.setDuration(350);
rotation.setFillAfter(true);
rotation.setInterpolator(new LinearInterpolator());
rotation.setAnimationListener(new DisplayNextView(isFrontShowing[position], detailsLayout[position], scriptLayout[position]));
if (isFrontShowing[position] == true)
{
detailsLayout[position].startAnimation(rotation);
} else {
//System.out.println("---Backward flipping started...");
scriptLayout[position].startAnimation(rotation);
}
}
import android.view.animation.Animation;
导入android.view.animation.Transformation；导入android.graphics.Camera；导入android.graphics.Matrix；
公共类 Rotate3dAnimation 扩展动画 { 私有最终浮点 mFromDegrees; 私人最终浮动 mToDegrees；私人最终浮动 mCenterX；私人最终浮动 mCenterY；私人最终浮动 mDepthZ；私有最终布尔值 mReverse；私人相机 mCamera；public Rotate3dAnimation(float fromDegrees, float toDegrees, float centerX, float centerY, float depthZ, boolean reverse) { mFromDegrees = fromDegrees; mToDegrees = toDegrees; mCenterX = 中心X；mCenterY = 中心Y；mDepthZ = 深度Z；mReverse = 反向；}
@Override
public void initialize(int width, int height, int parentWidth, int parentHeight) {
super.initialize(width, height, parentWidth, parentHeight);
mCamera = new Camera();
}
@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
final float fromDegrees = mFromDegrees;
float degrees = fromDegrees + ((mToDegrees - fromDegrees) * interpolatedTime);
final float centerX = mCenterX;
final float centerY = mCenterY;
final Camera camera = mCamera;
final Matrix matrix = t.getMatrix();
camera.save();
if (mReverse) {
camera.translate(0.0f, 0.0f, mDepthZ * interpolatedTime);
} else {
camera.translate(0.0f, 0.0f, mDepthZ * (1.0f - interpolatedTime));
}
camera.rotateY(degrees);
camera.getMatrix(matrix);
camera.restore();
matrix.preTranslate(-centerX, -centerY);
matrix.postTranslate(centerX, centerY);
}
}
package com.vocabAhead.SATVocab;
导入android.view.animation.Animation；导入 android.widget.RelativeLayout；
公共最终类 DisplayNextView 实现 Animation.AnimationListener { private boolean mCurrentView; 相对布局布局1；相对布局布局2；
public DisplayNextView(boolean currentView, RelativeLayout layout1,
RelativeLayout layout2) {
mCurrentView = currentView;
this.layout1 = layout1;
this.layout2 = layout2;
}
public void onAnimationStart(Animation animation) {
}
public void onAnimationEnd(Animation animation) {
if(mCurrentView == true)
layout1.post(new SwapViews(mCurrentView, layout1, layout2));
else
layout2.post(new SwapViews(mCurrentView, layout1, layout2));
}
public void onAnimationRepeat(Animation animation) {
}
}
package com.vocabAhead.SATVocab;
导入android.view.View；导入android.view.animation.Animation；导入 android.view.animation.LinearInterpolator；导入 android.view.animation.Animation.AnimationListener；导入 android.widget.RelativeLayout；
公共最终类 SwapViews 实现 Runnable { private boolean mIsFirstView; 相对布局布局1；相对布局布局2；
public SwapViews(boolean isFirstView, RelativeLayout layout1, RelativeLayout layout2) {
mIsFirstView = isFirstView;
this.layout1 = layout1;
this.layout2 = layout2;
}
public void run() {
final float centerX, centerY;
if(mIsFirstView) {
centerX = layout1.getWidth() / 2.0f;
centerY = layout1.getHeight() / 2.0f;
} else {
centerX = layout2.getWidth() / 2.0f;
centerY = layout2.getHeight() / 2.0f;
}
Rotate3dAnimation rotation;
if (mIsFirstView == true) {
layout1.setVisibility(View.GONE);
layout2.setVisibility(View.VISIBLE);
layout2.requestFocus();
layout2.bringToFront();
rotation = new Rotate3dAnimation( -90, 0, centerX, centerY, 200.0f, false);
} else {
layout2.setVisibility(View.GONE);
layout1.setVisibility(View.VISIBLE);
layout1.requestFocus();
layout1.bringToFront();
rotation = new Rotate3dAnimation(-90, 0, centerX, centerY, 200.0f, false);
//rotation = new Flip3dAnimation(-90, 0, centerX, centerY);
}
rotation.setDuration(350);
rotation.setFillAfter(true);
rotation.setInterpolator(new LinearInterpolator());
rotation.setAnimationListener(new AnimationListener() {
public void onAnimationStart(Animation arg0) {
}
public void onAnimationRepeat(Animation arg0) {
// TODO Auto-generated method stub
}
public void onAnimationEnd(Animation arg0) {
WordDetailItemAdapter.notifyAdapter();
}
});
if (mIsFirstView == true) {
layout2.startAnimation(rotation);
} else {
layout1.startAnimation(rotation);
}
}
}