android camera Intent调用

时间：2011-05-29 来源：pandans

/*用来标识请求照相功能的activity*/
private static final int CAMERA_WITH_DATA = 3023;

/*用来标识请求gallery的activity*/
private static final int PHOTO_PICKED_WITH_DATA = 3021;

/*拍照的照片存储位置*/
private static final File PHOTO_DIR = new File(Environment.getExternalStorageDirectory() + "/DCIM/Camera");

注意此处写的是sd卡路径需加 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 权限

如果此处写成程序路径拍照以后不会调用onActivityResult 原因外边程序无法访问本程序

private File mCurrentPhotoFile;//照相机拍照得到的图片

private void doPickPhotoAction() {
         Context context = EditContact.this;

         // Wrap our context to inflate list items using correct theme
         final Context dialogContext = new ContextThemeWrapper(context,
                  android.R.style.Theme_Light);
         String cancel="返回";
         String[] choices;
         choices = new String[2];
         choices[0] = getString(R.string.take_photo);  //拍照
         choices[1] = getString(R.string.pick_photo);  //从相册中选择
         final ListAdapter adapter = new ArrayAdapter<String>(dialogContext,
                  android.R.layout.simple_list_item_1, choices);

         final AlertDialog.Builder builder = new AlertDialog.Builder(
                  dialogContext);
         builder.setTitle(R.string.attachToContact);
         builder.setSingleChoiceItems(adapter, -1,
                  new DialogInterface.OnClickListener() {
                     public void onClick(DialogInterface dialog, int which) {
                        dialog.dismiss();
                        switch (which) {
                        case 0:{
                              String status=Environment.getExternalStorageState();
                              if(status.equals(Environment.MEDIA_MOUNTED)){//判断是否有SD卡
                                 doTakePhoto();// 用户点击了从照相机获取
                              }
                              else{
                                 showToast("没有SD卡");
                              }
                              break;

                        }
                        case 1:
                              doPickPhotoFromGallery();// 从相册中去获取
                              break;
                        }
                     }
                  });
         builder.setNegativeButton(cancel, new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {
                  dialog.dismiss();
            }

         });
         builder.create().show();
      }
}

/**
* 拍照获取图片
*
*/
protected void doTakePhoto() {
      try {
         // Launch camera to take photo for selected contact
         PHOTO_DIR.mkdirs();// 创建照片的存储目录
         mCurrentPhotoFile = new File(PHOTO_DIR, getPhotoFileName());// 给新照的照片文件命名
         final Intent intent = getTakePickIntent(mCurrentPhotoFile);
         startActivityForResult(intent, CAMERA_WITH_DATA);
      } catch (ActivityNotFoundException e) {
         Toast.makeText(this, R.string.photoPickerNotFoundText,
                  Toast.LENGTH_LONG).show();
      }
}

public static Intent getTakePickIntent(File f) {
      Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE, null);
      intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
      return intent;
}

/**
* 用当前时间给取得的图片命名
*
*/
private String getPhotoFileName() {
      Date date = new Date(System.currentTimeMillis());
      SimpleDateFormat dateFormat = new SimpleDateFormat(
            "'IMG'_yyyy-MM-dd HH:mm:ss");
      return dateFormat.format(date) + ".jpg";
}

// 请求Gallery程序
protected void doPickPhotoFromGallery() {
      try {
         // Launch picker to choose photo for selected contact
         final Intent intent = getPhotoPickIntent();
         startActivityForResult(intent, PHOTO_PICKED_WITH_DATA);
      } catch (ActivityNotFoundException e) {
         Toast.makeText(this, R.string.photoPickerNotFoundText1,
                  Toast.LENGTH_LONG).show();
      }
}

// 封装请求Gallery的intent
public static Intent getPhotoPickIntent() {
      Intent intent = new Intent(Intent.ACTION_GET_CONTENT, null);
      intent.setType("image/*");
      intent.putExtra("crop", "true");
      intent.putExtra("aspectX", 1);
      intent.putExtra("aspectY", 1);
      intent.putExtra("outputX", 80);
      intent.putExtra("outputY", 80);
      intent.putExtra("return-data", true);
      return intent;
}

// 因为调用了Camera和Gally所以要判断他们各自的返回情况,他们启动时是这样的startActivityForResult
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
      if (resultCode != RESULT_OK)
         return;
      switch (requestCode) {
         case PHOTO_PICKED_WITH_DATA: {// 调用Gallery返回的
            final Bitmap photo = data.getParcelableExtra("data");
            // 下面就是显示照片了
            System.out.println(photo);
            //缓存用户选择的图片
            img = getBitmapByte(photo);
            mEditor.setPhotoBitmap(photo);
            System.out.println("set new photo");
            break;
         }
         case CAMERA_WITH_DATA: {// 照相机程序返回的,再次调用图片剪辑程序去修剪图片
            doCropPhoto(mCurrentPhotoFile);
            break;
         }
      }
}

protected void doCropPhoto(File f) {
      try {
         // 启动gallery去剪辑这个照片
         final Intent intent = getCropImageIntent(Uri.fromFile(f));
         startActivityForResult(intent, PHOTO_PICKED_WITH_DATA);
      } catch (Exception e) {
         Toast.makeText(this, R.string.photoPickerNotFoundText,
                  Toast.LENGTH_LONG).show();
      }
}

/**
* Constructs an intent for image cropping. 调用图片剪辑程序
*/
public static Intent getCropImageIntent(Uri photoUri) {
      Intent intent = new Intent("com.android.camera.action.CROP");
      intent.setDataAndType(photoUri, "image/*");
      intent.putExtra("crop", "true");
      intent.putExtra("aspectX", 1);
      intent.putExtra("aspectY", 1);
      intent.putExtra("outputX", 80);
      intent.putExtra("outputY", 80);
      intent.putExtra("return-data", true);
      return intent;
}