我已經實現了一個動畫,其中我在imageview中的回收視圖中,點擊該項目時我想對圖像執行一些動畫鑑於回收視野之外,使 - 我創建了一個新的ImageView, - 把它添加到主容器 - 做了它的動畫 - 最後我從主容器獲取NullPointerException:嘗試從字段'int android.view.View.mViewFlags'中讀取 - Android動畫
這裏刪除它的代碼回收查看點擊項目:
代碼:
final ImageView iv = new ImageView(getContext());
iv.setImageDrawable(fromView.getDrawable());
iv.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
iv.setLayoutParams(fromView.getLayoutParams());
v_mainContainer.addView(iv);
AnimationSet animatinSet = new AnimationSet(false);
animatinSet.setFillAfter(false);
animatinSet.setFillBefore(true);
animatinSet.setDuration(1500);
animatinSet.setInterpolator(new DecelerateInterpolator());
// ... rest of the animation
animatinSet.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
v_mainContainer.removeView(iv);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
animatinSet.setAnimationListener(animationListner);
animatinSet.setDuration(1500);
iv.startAnimation(animatinSet);
當我在1視圖上運行此動畫時,它工作正常。不過,當我在相同的視圖上多次運行動畫時,以及在我運行另一個視圖之前完成動畫時,我會看到下面的錯誤。
錯誤日誌:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.mbh.testApp, PID: 9628
java.lang.NullPointerException: Attempt to read from field 'int android.view.View.mViewFlags' on a null object reference
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:3549)
at android.view.View.draw(View.java:17071)
at android.view.View.updateDisplayListIfDirty(View.java:16050)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3748)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3728)
at android.view.View.updateDisplayListIfDirty(View.java:16013)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3748)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3728)
at android.view.View.updateDisplayListIfDirty(View.java:16013)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3748)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3728)
at android.view.View.updateDisplayListIfDirty(View.java:16013)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3748)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3728)
at android.view.View.updateDisplayListIfDirty(View.java:16013)
at android.view.ViewGroup.recreateChildDisplayList(ViewGroup.java:3748)
at android.view.ViewGroup.dispatchGetDisplayList(ViewGroup.java:3728)
at android.view.View.updateDisplayListIfDirty(View.java:16013)
at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:656)
at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:662)
at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:770)
at android.view.ViewRootImpl.draw(ViewRootImpl.java:2796)
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2604)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2211)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1246)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6301)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:871)
at android.view.Choreographer.doCallbacks(Choreographer.java:683)
at android.view.Choreographer.doFrame(Choreographer.java:619)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:857)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
我試圖把從主容器取出視圖時try-catch塊,但它並沒有改變結果,並仍然得到同樣的錯誤。
我也試過這個答案https://stackoverflow.com/a/4295570/2296787並沒有解決問題
奇怪的是,該錯誤犯規給我看完全異常升高。
非常感謝您的幫助。
在模擬器它我沒有工作。運行在真實的設備上,然後它工作正常 – sasikumar
@sasikumar正確!它在真實設備上運行良好!它被固定在仿真器上,當我使用postDelayed以500毫秒的延遲去除視圖! 非常感謝你 – MBH
快樂編碼! – sasikumar