如何分析java.lang.IllegalArgumentException: Cannot draw recycled bitmaps异常

如何分析java.lang.IllegalArgumentException: Cannot draw recycled bitmaps异常

[DESCRIPTION]

如何分析JAVA.lang.IllegalArgumentException: Cannot draw recycled bitmaps异常

[SOLUTION]

该类问题的分析,一般是需要找到bitmap对象在那个位置有被recyle，然后再检查代码。
如何定位到是在哪个代码位置有把bitmap 对象recyle，可以在 Bitmap.java的recycle方法中，加
log打印出call stack来定位。
具体的修改参考如下：
public void recycle() {
if (!mRecycled) {
if (nativeRecycle(mNativeBitmap)) {
// return value indicates whether native pixel object was actually recycled.
// false indicates that it is still in use at the native level and these
// objects should not be collected now. They will be collected later when the
// Bitmap itself is collected.
mBuffer = null;
mNinePatchChunk = null;
}
mRecycled = true;
log.e("bitmap recyle! ", "this = " + this ,new Throwable("recycle"));
}
}
然后在抛 java.lang.IllegalArgumentException: Cannot draw recycled bitmaps 异常的地方
，也将bitmap 对象打印出来。 抓取复现问题的mobile log 分析。
例如如下的log:
在main log中搜索“FATAL EXCEPTION”看到发生fatal error exception的 trace如下，对应的
bitmap对象为 android.graphics.Bitmap@4218d0c8
01-01 08:03:23.841 2369 2369 D AndroidRuntime: Shutting down VM
01-01 08:03:23.841 2369 2369 W dalvikvm: threadid=1: thread exiting with uncaught
exception (group=0x40f979a8)
01-01 08:03:23.856 2369 2369 E AndroidRuntime: FATAL EXCEPTION: main
01-01 08:03:23.856 2369 2369 E AndroidRuntime: java.lang.IllegalArgumentException:
Cannot draw recycled bitmapsandroid.graphics.Bitmap@4218d0c8
然后再在main log中搜索关键字 “@4218d0c8 ” ，就可以看到该对象被recyle的call stack
01-01 08:03:22.741 2369 2369 E bitmap recyle! : this = android.graphics.Bitmap@4218d0c8
01-01 08:03:22.741 2369 2369 E bitmap recyle! : java.lang.Throwable: recycle
01-01 08:03:22.741 2369 2369 E bitmap recyle! : at
android.graphics.Bitmap.recycle(Bitmap.java:214)
01-01 08:03:22.741 2369 2369 E bitmap recyle! : at
com.xxx.xxxx.xxxActivity.onDestroy(xxxActivity.java:190)
01-01 08:03:22.741 2369 2369 E bitmap recyle! : at
android.app.Fragment.performDestroy(Fragment.java:1908)
......
上面例子中，红色标识的代码位置，即是需要检查的点。