在那里把自动对焦的类Android摄像头 [英] where to put autofocus in the class android camera

问题描述

我想使用autofoucs我不知道往哪里放自动对焦任何人有一个想法如何实现自动对焦？

---------- preVIEW类----------

 包com.marakana;

 进口java.io.IOException异常;

 进口android.content.Context;
 进口android.hardware.Camera;
 进口android.hardware.Camera previewCallback。
 进口android.util.Log;
 进口android.view.SurfaceHolder;
 进口android.view.SurfaceView;

类preVIEW延伸SurfaceView实现SurfaceHolder.Callback {//＆其中1为卤素;
私有静态最后字符串变量=preVIEW;

SurfaceHolder mHolder; // 2＆GT;
公共摄像头摄像头; //＆其中3的密度;

preVIEW（上下文的背景下）{
超（上下文）;

//安装SurfaceHolder.Callback所以我们得到通知时，该
//下垫面创建和销毁。
mHolder = getHolder（）; //＆所述; 4为H.
mHolder.addCallback（本）; //＆其中5个;
mHolder.setType（SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS）; //＆其中; 6个
}

 //调用一次支架已准备就绪
公共无效surfaceCreated（SurfaceHolder持有者）{//＆其中7个;
//表面经创建，获取摄像机，并告诉它在哪里
//绘制。
相机= Camera.open（）; //＆其中8是氢;
尝试 {
  camera.set previewDisplay（保持器）; //＆其中9个;

  camera.set previewCallback（新previewCallback（）{//小于10＆GT;
    //呼吁每一帧previewed
    在previewFrame（byte []的数据，摄像头摄像头）{//＆LT公共无效; 11＆GT;
      Log.d（关于previewFrame所谓的标签+ System.currentTimeMillis的（））;
      preview.this.invalidate（）; //＆其中12所取代;
     }
   }）;
 }赶上（IOException异常E）{//＆LT; 13＆GT;
  e.printStackTrace（）;
   }
  }

 //当支架被破坏时调用
公共无效surfaceDestroyed（SurfaceHolder持有者）{//＆所述14取代;
camera.stop preVIEW（）;
摄像头= NULL;
}

//调用时，持有人已变更
公共无效surfaceChanged（SurfaceHolder持有人，INT格式，INT W，INT高）{//＆LT; 15＆GT;
  camera.start preVIEW（）;
 }

}
 

-----------------摄像头活动------------------------

  preVIEW =新的preVIEW（本）; //＆其中3的密度;
（（的FrameLayout）findViewById（R.id. preVIEW））addView（preVIEW）。 //＆所述; 4为H.

buttonClick =（按钮）findViewById（R.id.buttonClick）;
buttonClick.setOnClickListener（新OnClickListener（）{
  公共无效的onClick（视图v）{//小于5＆GT;

      preview.camera.takePicture（shutterCallback，rawCallback，jpegCallback）;
  }
}）;

//处理数据的JPEG图片
PictureCallback jpegCallback =新PictureCallback（）{//＆所述8是氢;
公共无效onPictureTaken（byte []的数据，摄像头摄像头）{
  FileOutputStream中outStream = NULL;
  尝试 {
    //写入SD卡

    outStream =新的FileOutputStream（imgPath）; //＆其中9个;
    outStream.write（数据）;
    outStream.close（）;
    intImg =新的意图（CameraActivity.this，DisplayImg.class）;
    intImg.putExtra（imgPath，imgPath）;
    startActivity（intImg）;
    Log.d（TAG，onPictureTaken  - 写字节：+ data.length）;
  }赶上（FileNotFoundException异常E）{//小于10＆GT;
    e.printStackTrace（）;
  }赶上（IOException异常E）{
    e.printStackTrace（）;
  } 最后 {
  }
  Log.d（TAG，onPictureTaken  -  JPEG）;
}
};
 

解决方案

如果您有自动对焦设置，你应该做的是这样的：

  camera.autoFocus（新AutoFocusCallback（）{
        @覆盖
        公共无效onAutoFocus（布尔成功，相机摄像头）{
            如果（成功）{
                camera.takePicture（shutterCallback，rawCallback，jpegCallback）;
            }
        }
    }）;
 

就是这样的相机等待自动对焦;）

I am trying to use autofoucs i have no idea where to put autofocus anyone has an idea how to implement autofocus?

----------preview class----------

 package com.marakana;

 import java.io.IOException;

 import android.content.Context;
 import android.hardware.Camera;
 import android.hardware.Camera.PreviewCallback;
 import android.util.Log;
 import android.view.SurfaceHolder;
 import android.view.SurfaceView;

class Preview extends SurfaceView implements SurfaceHolder.Callback { // <1>
private static final String TAG = "Preview";

SurfaceHolder mHolder;  // <2>
public Camera camera; // <3>

Preview(Context context) {
super(context);

// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
mHolder = getHolder();  // <4>
mHolder.addCallback(this);  // <5>
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); // <6>
}

 // Called once the holder is ready
public void surfaceCreated(SurfaceHolder holder) {  // <7>
// The Surface has been created, acquire the camera and tell it where
// to draw.
camera = Camera.open(); // <8>
try {
  camera.setPreviewDisplay(holder);  // <9>

  camera.setPreviewCallback(new PreviewCallback() { // <10>
    // Called for each frame previewed
    public void onPreviewFrame(byte[] data, Camera camera) {  // <11>
      Log.d(TAG, "onPreviewFrame called at: " + System.currentTimeMillis());
      Preview.this.invalidate();  // <12>
     }
   });
 } catch (IOException e) { // <13>
  e.printStackTrace();
   }
  }

 // Called when the holder is destroyed
public void surfaceDestroyed(SurfaceHolder holder) {  // <14>
camera.stopPreview();
camera = null;
}

// Called when holder has changed
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { // <15>
  camera.startPreview();
 }

}

-----------------camera activity------------------------

preview = new Preview(this); // <3>
((FrameLayout) findViewById(R.id.preview)).addView(preview); // <4>

buttonClick = (Button) findViewById(R.id.buttonClick);
buttonClick.setOnClickListener(new OnClickListener() {
  public void onClick(View v) { // <5>

      preview.camera.takePicture(shutterCallback, rawCallback, jpegCallback);
  }
});

// Handles data for jpeg picture
PictureCallback jpegCallback = new PictureCallback() { // <8>
public void onPictureTaken(byte[] data, Camera camera) {
  FileOutputStream outStream = null;
  try {
    // Write to SD Card

    outStream = new FileOutputStream(imgPath); // <9>
    outStream.write(data);
    outStream.close();
    intImg = new Intent(CameraActivity.this, DisplayImg.class);
    intImg.putExtra("imgPath",imgPath);
    startActivity(intImg);
    Log.d(TAG, "onPictureTaken - wrote bytes: " + data.length);
  } catch (FileNotFoundException e) { // <10>
    e.printStackTrace();
  } catch (IOException e) {
    e.printStackTrace();
  } finally {
  }
  Log.d(TAG, "onPictureTaken - jpeg");
}
};

解决方案

If you have autofocus set, you should do something like this:

camera.autoFocus(new AutoFocusCallback() {
        @Override
        public void onAutoFocus(boolean success, Camera camera) {
            if(success){
                camera.takePicture(shutterCallback, rawCallback, jpegCallback);
            }
        }
    });

That's the way the camera waits for the autofocus ;)

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