我调用此函数来为ImageView对象设置背景图像“smileysImg”并播放动画“smileyFadeoutAnim”。这是代码:
public void showSmileyImage(){
if(smileyNum > 5)
smileyNum = 1;
else smileyNum++;
switch (smileyNum){
case 1: smileysImg.setBackgroundResource(R.drawable.smiley_1); break;
case 2: smileysImg.setBackgroundResource(R.drawable.smiley_2); break;
case 3: smileysImg.setBackgroundResource(R.drawable.smiley_3); break;
case 4: smileysImg.setBackgroundResource(R.drawable.smiley_4); break;
case 5: smileysImg.setBackgroundResource(R.drawable.smiley_5); break;
default: smileysImg.setBackgroundResource(R.drawable.smiley_5);
}
smileysImg.setVisibility(View.VISIBLE);
smileyFadeoutAnim.setAnimationListener(new Animation.AnimationListener()
{
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
smileysImg.setVisibility(View.GONE);
smileysImg.clearAnimation();
smileysImg.setBackgroundResource(0);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
smileysImg.startAnimation(smileyFadeoutAnim);
}
它有时会工作，有时会因此错误日志而崩溃
FATAL EXCEPTION: main
Process: com.testaday.tad1stgrademathpractice, PID: 32399
java.lang.IllegalStateException: Could not execute method of the activity
at android.view.View$1.onClick(View.java:3823)
at android.view.View.performClick(View.java:4438)
at android.view.View$PerformClick.run(View.java:18422)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at android.view.View$1.onClick(View.java:3818)
at android.view.View.performClick(View.java:4438)
at android.view.View$PerformClick.run(View.java:18422)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.OutOfMemoryError
at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:587)
at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:422)
at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:840)
at android.content.res.Resources.loadDrawable(Resources.java:2115)
at android.content.res.Resources.getDrawable(Resources.java:700)
at android.view.View.setBackgroundResource(View.java:15303)
at com.testaday.tad1stgrademathpractice.ExamView.showSmileyImage(ExamView.java:836)
at com.testaday.tad1stgrademathpractice.ExamView.onClick_submit(ExamView.java:750)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at android.view.View$1.onClick(View.java:3818)
at android.view.View.performClick(View.java:4438)
at android.view.View$PerformClick.run(View.java:18422)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)
如何解决这个问题。
最佳答案
我更改了以下代码case 1: smileysImg.setBackgroundResource(R.drawable.smiley_1); break;
至smileysImg.setImageDrawable(ResourcesCompat.getDrawable(getResources(), R.drawable.smiley_1, null))我也这样做了android:largeHeap="true"
这并不能解决问题。 App仍然崩溃，但比以前花费了更多时间。
无法正确缩放图像会导致OutofMemoryError，但是我的图像很小，所以我认为没有必要缩小图像。
经过大量搜索，我发现from this answer是在调用System.gc();之前先调用showSmileyImage()的一个好主意。它解决了问题。
但是我也发现这个answer“可能”与第一个答案相矛盾，但是仍然调用gc解决了这个问题。