java-Android day08

Android Day05

by 木石溪
dev: 1.0

Key points

• Q.10：關於Android調用 Camera.open() 時，找不到方法；
• Q.11：關於調用相機找不到 PictureCallback();
• Q.12：關於調用相機找不到 PreviewCallback();

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Question 10：

Camera.open( )
Detail：
cannot find the function of open(), in class of Camera
solve：
Most likely importing the wrong camera class that import android.graphics.camera. You should import the following sentence to override it.

		import android.hardware.camera

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Question 11：

PictureCallback()
Detail：
Error: cannot find the symbol in MainActivity Class: PictureCallback
solve:
Most likely not importing the class , Camera.PictureCallback. You only should import the following sentence;

		import android.hardware.Camera.PictureCallback;

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Question 12:

PreviewCallback()
Detail：
Error: cannot find the symbol in MainActivity Class: PreviewCallback
solve:
Most likely not importing the class , Camera.PreviewCallback. You only should import the following sentence;

		import android.hardware.Camera.PreviewCallback;

Note

**If you want to solve the two questions above at once, you only should import the following sentence in your MainActivity.java

		import android.camera.*

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Question 13: