Android相机和SurfaceView无法正常工作

Question

I'm getting this weird error in my code

Cannot resolve symbol 'surfaceCallback'

theese are my current imports

import android.content.Intent;
import android.hardware.Camera;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarActivity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

Answer 1

实现SurfaceHolder.Callback您的活动，并通过this在addCallBack();

Answer 2

SurfaceHolder.Callback is related to its Surface.

Abstract interface to someone holding a display surface. Allows you to control the surface size and format, edit the pixels in the surface, and monitor changes to the surface. This interface is typically available through the SurfaceView class.

When using this interface from a thread other than the one running its SurfaceView , you will want to carefully read the methods lockCanvas() and Callback.surfaceCreated() .

You need to implement the SurfaceCallback interface of SurfaceView as below:

public class callbackSurfaceMethod implements SurfaceHolder.Callback{
  @Override
public void surfaceCreated(SurfaceHolder holder) {
    // TODO Auto-generated method stub

}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
        int height) {
    // TODO Auto-generated method stub

}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {
    // TODO Auto-generated method stub

}

Change in your code.

surfaceView = (SurfaceView)findViewById(R.id.surfaceview);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(callbackSurfaceMethod );

Answer 3

try this code,

surfaceView = (SurfaceView)findViewById(R.id.surfaceview);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);