[英]cwac-camera crash on zoom to
I'm using the CameraDemo app included with cwac-camera. 我正在使用cwac-camera附带的CameraDemo应用程序。 I'm trying to make the zoom bar change from the main activity using a method updateZoom() but I'm getting a nullpointerexception sometimes from the zoomTo return. 我正在尝试使用方法updateZoom()从主活动中更改缩放栏,但我有时会从zoomTo返回获得nullpointerexception。 Most of the time the zoom will work but then occasionally the program will crash. 大多数情况下缩放将起作用,但偶尔程序会崩溃。
Updated zoom: 更新缩放:
public void updateZoom()
{
zoom.setEnabled(false);
current.zoomTo(zoom.getProgress()).onComplete(new Runnable() {
@Override
public void run() {
zoom.setEnabled(true);
}
}).go();
}
Call to updateZoom(): 调用updateZoom():
zoom.incrementProgressBy(20);
updateZoom();
Error Logs: 错误日志:
03-01 09:47:55.763: E/AndroidRuntime(31950): FATAL EXCEPTION: main
03-01 09:47:55.763: E/AndroidRuntime(31950): Process: com.commonsware.cwac.camera.demo, PID: 31950
03-01 09:47:55.763: E/AndroidRuntime(31950): java.lang.NullPointerException
03-01 09:47:55.763: E/AndroidRuntime(31950): at com.commonsware.cwac.camera.CameraFragment.zoomTo(CameraFragment.java:269)
03-01 09:47:55.763: E/AndroidRuntime(31950): at com.commonsware.cwac.camera.demo.MainActivity.updateZoom(MainActivity.java:163)
03-01 09:47:55.763: E/AndroidRuntime(31950): at com.commonsware.cwac.camera.demo.MainActivity$1.onPose(MainActivity.java:116)
您呼叫updateZoom()
在一个点时, CameraFragment
没有CameraView
,所以你得到一个NullPointerException
时CameraFragment
试图传递zoomTo()
调用一起到CameraView
。
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