Android iOS 挖挖挖: AutoFocus

拍照功能參考在 Android 裡使用 Camera 照相
並加入自動對焦與列出照片並可刪除該照片檔案

1.AndroidManifest.xml加入權限

2.建立java檔與layout檔

TakeAPhotoActivity.java 拍照

package tw.android;

import android.app.Activity;
import android.content.Intent;
import android.hardware.Camera;
import android.hardware.Camera.AutoFocusCallback;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;

public class TakeAPhotoActivity extends Activity {

 private static final String TAG = "TakeAPhotoActivity";
 private SurfaceView sv;
 // private ImageView iv;
 private Button takePhotoBtn, hidePhotoBtn, autoFocus,picList;
 // 相機 callback
 private CameraCallback cc;
 // 快門 callback
 private ShCallback sc;
 // 處理 raw data callback
 private RawCallback rc;
 // 處理 jpg callback
 private JpgCallback jc;

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.take_a_photo_activity);

  this.sv = (SurfaceView) this.findViewById(R.id.sv);
  this.takePhotoBtn = (Button) this.findViewById(R.id.takePhotoBtn);
  this.hidePhotoBtn = (Button) this.findViewById(R.id.hidePhotoBtn);
  this.autoFocus = (Button) this.findViewById(R.id.autoFocus);
  this.picList= (Button) this.findViewById(R.id.picList);
  
  this.cc = new CameraCallback();
  this.sc = new ShCallback();
  this.rc = new RawCallback();
  this.jc = new JpgCallback(this);

  Log.d(TAG, "設定預覽視窗...");
  SurfaceHolder sh = this.sv.getHolder();
  sh.addCallback(this.cc);
  sh.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

  Log.d(TAG, "設定拍照頁面...");
  this.hidePhotoBtn.setVisibility(View.GONE);

  // 按鈕外按自動對焦
  autoFocus.setOnClickListener(new Button.OnClickListener() {

   @Override
   public void onClick(View v) {
    cc.getCarema().autoFocus(new AutoFocusCallback() {
     @Override
     public void onAutoFocus(boolean success, Camera camera) {

     }
    });
   }
  });
  //前往照片列表
  picList.setOnClickListener(new Button.OnClickListener() {

   @Override
   public void onClick(View v) {
    goToPicList();
   }
  });
  
 }

 public void takePhoto(View v) {
  Log.d(TAG, "拍照...");
  // 需要三個 callback：快門、處理 raw data、處理 jpg
  // 拍照時自動對焦
  this.cc.getCarema().autoFocus(new AutoFocusCallback() {
   @Override
   public void onAutoFocus(boolean success, Camera camera) {
    if (success) {
     camera.takePicture(sc, rc, jc);
    }
   }
  });
 }

 public void hidePhoto(View v) {
  Log.d(TAG, "設定拍照頁面...");
  this.takePhotoBtn.setVisibility(View.VISIBLE);// 顯示拍照按鈕
  this.hidePhotoBtn.setVisibility(View.GONE); // 隱藏重拍按鈕

  Log.d(TAG, "回到拍照功能，需重新啟動預覽...");
  this.cc.getCarema().startPreview();
 }

 public void showPhoto(String picPath) {
  Log.d(TAG, "取得照片路徑：" + picPath);
  Log.d(TAG, "設定照片頁面...");
  this.takePhotoBtn.setVisibility(View.GONE);
  this.hidePhotoBtn.setVisibility(View.VISIBLE);

 }

 //前往照片列表
  public void goToPicList(){
   Intent intent=new Intent(this,PhotoList.class);
   startActivity(intent);
  }

}

CameraCallback.java

package tw.android;

import java.io.IOException;

import android.hardware.Camera;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;


public class CameraCallback implements Callback {

    private static final String TAG = "CameraCallback";
    private Camera carema;

    public Camera getCarema() {
        return this.carema;
    }

    public void surfaceCreated(SurfaceHolder holder) {
        Log.d(TAG, "啟動相機...");
        this.carema = Camera.open();
        try {
            Log.d(TAG, "設定預覽視窗");
            this.carema.setPreviewDisplay(holder);
        }
        catch (IOException e) {
            Log.e(TAG, e.getMessage(), e);
        }
    }

    public void surfaceChanged(SurfaceHolder holder, int format, int width,
            int height) {
        Log.d(TAG, "開始預覽...");
        this.carema.setDisplayOrientation(90); //相機旋轉90度
        this.carema.startPreview();
    }

    public void surfaceDestroyed(SurfaceHolder holder) {
        Log.d(TAG, "停止預覽...");
        this.carema.stopPreview();
        Log.d(TAG, "釋放相機資源...");
        this.carema.release();
        this.carema = null;
    }

 
}

JpgCallback.java

package tw.android;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

import android.annotation.SuppressLint;
import android.content.SharedPreferences;
import android.hardware.Camera;
import android.hardware.Camera.PictureCallback;
import android.os.Environment;
import android.util.Log;

public class JpgCallback implements PictureCallback {

    private static final String TAG = "JpgCallback";
    private String picPath;
    private TakeAPhotoActivity act;
    int number;
    public JpgCallback(TakeAPhotoActivity act) {
        super();
        this.act = act;
    }

    @Override
    public void onPictureTaken(byte[] data, Camera camera) {
        Log.d(TAG, "處理 JPG 資料，輸出 jpg 檔...");
        /*-- 2015-09-11 相機旋轉90度後，照片需要跟著旋轉90度 --*/
        Bitmap srcBmp, dstBmp;
        srcBmp= BitmapFactory.decodeByteArray(data, 0, data.length);
        Matrix matrix=new Matrix();
        matrix.reset();
        matrix.postRotate(90f);
        dstBmp= Bitmap.createBitmap(srcBmp, 0, 0, srcBmp.getWidth(), srcBmp.getHeight(), matrix, true);
        /*-- 2015-09-11 --*/
        FileOutputStream os = null;
        try {
            File pic = this.createPicFile();
            os = new FileOutputStream(pic);
            dstBmp.compress(Bitmap.CompressFormat.JPEG, 100, os); //2015-09-11 Bitmap 轉回 byte[]
            os.write(data);
        }
        catch (IOException e) {
            Log.e(TAG, e.getMessage(), e);
        }
        finally {
            if (os != null) {
                try {
                    os.close();
                }
                catch (IOException e) {
                }
            }
        }
        Log.d(TAG, "輸出 JPG 完成");
        // 顯示照片
        this.act.showPhoto(this.picPath);
    }

    @SuppressLint("DefaultLocale")
 private File createPicFile() {
        File sdDir = Environment.getExternalStorageDirectory();
        Log.d(TAG, "sdDir" + sdDir);
        File picDir = new File(sdDir, "takePic"); //建立放置照片資料夾
        if (!picDir.exists()) {
            picDir.mkdir();
        }
        long ctm =System.currentTimeMillis(); //照片名
        
        /* SharedPreferences */
        try {
   SharedPreferences preferencesGet = this.act
     .getSharedPreferences("takePic",
       android.content.Context.MODE_PRIVATE);
   number=preferencesGet.getInt("number", 0); //照片數量
   
  } catch (Exception e) {

  }
        
  SharedPreferences preferencesSave = this.act
    .getSharedPreferences("takePic",
      android.content.Context.MODE_PRIVATE);
  SharedPreferences.Editor editor = preferencesSave.edit();
  
  Log.d(TAG,number+"");
  number++; //照片數量+1
  editor.putInt("number", number);
  editor.putLong(Integer.toString(number), ctm); //儲存照片名
  editor.commit();
  
  
        String fileName = String.format("%d.jpg", ctm);
        File pic = new File(picDir, fileName);
        this.picPath = pic.getAbsolutePath();
        Log.d(TAG, "照片路徑：" + this.picPath);
        return pic;
    }
}

RawCallback.java

package tw.android;

import android.hardware.Camera;
import android.hardware.Camera.PictureCallback;
import android.util.Log;

public class RawCallback implements PictureCallback {

    private static final String TAG = "RawCallback";

    @Override
    public void onPictureTaken(byte[] data, Camera camera) {
        Log.d(TAG, "處理 Raw data...");
    }

}

ShCallback.java

package tw.android;

import android.hardware.Camera.ShutterCallback;
import android.util.Log;

public class ShCallback implements ShutterCallback {

    private static final String TAG = "ShCallback";

    @Override
    public void onShutter() {
        Log.d(TAG, "啟動快門...");
    }
}

PhotoList.java 列出照片

package tw.android;

import java.io.File;

import android.app.Activity;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TableRow.LayoutParams;

public class PhotoList extends Activity {

 private Button[] detelPic;
 private String[] dataName;

private int number;

 private int id;

 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.photo_list);
  
  setTable();
 }


 // 排版
 public void setTable() {

  try {
   SharedPreferences preferencesGet = getApplicationContext()
     .getSharedPreferences("takePic",
       android.content.Context.MODE_PRIVATE);
   number=preferencesGet.getInt("number", 0);//取出照片數量
   dataName = new String[number];
   Log.i("number", number+"");
   for(int i = 0; i < number; i++){ 
    dataName[i]=String.valueOf(preferencesGet.getLong(Integer.toString(i+1), 0)); //放入照片名稱
    Log.i("dataName[i]", dataName[i]+"");
   }

  } catch (Exception e) {

  }
  
  
  TableLayout t1 = (TableLayout) findViewById(R.id.tableSet);
  t1.removeAllViews();
  TableRow.LayoutParams tP = new TableRow.LayoutParams(
    LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, 1f);

  tP.setMargins(0, 0, 0, 20);

  detelPic = new Button[number];
  for (int i = 0; i < number; i++) { // 列
   TableRow row = new TableRow(this);
   ImageView iv = new ImageView(this);
   String picPath = "/storage/emulated/0/takePic/" + dataName[i]
     + ".jpg";
   Uri uri = Uri.fromFile(new File(picPath));
   iv.setLayoutParams(tP);
   iv.setImageURI(uri);
   row.addView(iv, 0);

   // 刪除button
   detelPic[i] = new Button(this);
   detelPic[i].setText("刪除");
   detelPic[i].setId(i);
   detelPic[i].setOnClickListener(dp); // 動作
   row.addView(detelPic[i], 1);

   t1.addView(row);
  }

 }

 private OnClickListener dp = new OnClickListener() {
  public void onClick(View v) {

   id = v.getId();
   // 刪除照片
   File file = new File("/storage/emulated/0/takePic/" + dataName[id]
     + ".jpg");
   file.delete();

   
   setTable();//重整
  }
 };

}

take_a_photo_activity.xml //拍照layout

photo_list.xml //照相列表 layout

檔案下載:
https://github.com/terryyamg/AndroidCamera
參考來源:
1.http://cw1057.blogspot.tw/2011/12/android-camera_09.html
2.http://stackoverflow.com/questions/8058122/where-to-put-autofocus-in-the-class-android-camera
3.http://stackoverflow.com/questions/5486529/delete-file-from-internal-storage
4.http://stackoverflow.com/questions/10660598/android-camera-preview-orientation-in-portrait-mode
(2015-09-11 update)
5. http://rincliu.com/blog/2013/11/18/camera/
6.http://bingtian.iteye.com/blog/642128

Android iOS 挖挖挖

2014年12月24日星期三

Android Camera AutoFocus list delete picture 拍照自動對焦列出照片刪除照片

2014年12月24日 星期三

Android Camera AutoFocus list delete picture 拍照 自動對焦 列出照片 刪除照片

2014年12月24日星期三

Android Camera AutoFocus list delete picture 拍照自動對焦列出照片刪除照片