安卓调用系统相机进行拍照

调用系统相机进行拍照的话，步骤比较简单，分为两步

• 使用隐式Intent打开相机
• 在onActivityResult回调中对图片进行处理 (传回来的图片分为缩略图和原图,缩略图比较小可以直接进行展示,原图比较大,需要传输到文件中显示)
  拍照获取缩略图

private static final int REQ_CODE = 1;

private void takePhone(){
   	Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    if(intent.resolveActivity(getPackageManager())!=null){//这句作用是如果没有相机则该应用不会闪退，要是不加这句则当系统没有相机应用的时候该应用会闪退
        Log.e(TAG, "onClick: 手机有拍照功能" );
        startActivityForResult(intent,REQ_CODE);//启动相机
    }
}
		
 @Override
public void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
     super.onActivityResult(requestCode, resultCode, data);
      if (requestCode == REQ_CODE && resultCode == RESULT_OK){
            Log.e(TAG, "onActivityResult: jinru" );
            Bundle extras = data.getExtras();
            Bitmap data1 = (Bitmap) extras.get("data");
            addressImage.setImageBitmap(data1);
            Log.e(TAG, "onActivityResult: data"+data1.toString() );
      }
}

拍照获取原图

1. 先在清单文件applicaion当中配置

2. xml布局 file_paths.xml

3.Java代码

private static final int REQUEST_TAKE_PHOTO_CODE = 2;
private static final String FILE_PROVIDER_AUTHORITY = "com.example.ceshiapplication.fileProvider";
private Uri imageUri;

private void takePhoto() {
    //拍照并获取大图  图片存入相册
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    if (intent.resolveActivity(getPackageManager()) != null) {
    	File imageFile = createImageFile();//创建用来保存图片的文件
    	Log.e(TAG, "takePhoto: imageFile" + imageFile);
     	if (imageFile != null) {
       		if (Build.VERSION.SDK_INT > Build.VERSION_CODES.N) {
          		 //7.0以上需要通过FileProvider将file转换成uri
          		 imageUri = FileProvider.getUriForFile(this, FILE_PROVIDER_AUTHORITY, imageFile);
        	} else {
          	 	imageUri = Uri.fromFile(imageFile);
       		}
  	 	}
        intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
        startActivityForResult(intent, REQUEST_TAKE_PHOTO_CODE);
      }
 }
 
private File createImageFile() {
      String format = new SimpleDateFormat("yyyy-MM-DD").format(new Date());
      String fileName = "JDEG_" + format + "_";
      File file = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
       try {
          File imageFile = File.createTempFile(fileName, ".jpg", file);
           return imageFile;
       } catch (IOException e) {
           e.printStackTrace();
       }
        return null;
}

 @Override
 public void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
      super.onActivityResult(requestCode, resultCode, data);
      if (requestCode == REQUEST_TAKE_PHOTO_CODE && resultCode == RESULT_OK) {
          try {
                Bitmap bitmap = BitmapFactory.decodeStream(getActivity().getContentResolver().openInputStream(imageUri));
                addressImage.setImageBitmap(bitmap);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
}

步骤和打开相机差不多 都是使用隐式Intent

private static final int CHOOSE_PHONE = 3;

private void openAlbum() {
     Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
     intent.setType("image
private void lowVersionDisplayPicture(Intent data) {
   Uri uri = data.getData();
  	String imagePath = getImagePath(uri,null);
   displayImage(imagePath);
}


    @TargetApi(19)
    private void displayPicture(Intent data) {
        String imagePath = null;
        Uri uri = data.getData();
        if (documentsContract.isdocumentUri(getActivity(), uri)) {
            //如果是document类型的Uri，则提供document id处理
            String docId = documentsContract.getdocumentId(uri);
            if ("com.android.providers.media.documents".equals(uri.getAuthority())) {
                String id = docId.split(":")[1];//解析出数字格式的id
                String selection = MediaStore.Images.Media._ID + "=" + id;
                imagePath = getImagePath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, selection);
            } else if ("com.android.providers.downloads.documents".equals(uri.getAuthority())) {
                Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(docId));
                imagePath = getImagePath(contentUri, null);
            }
        } else if ("content".equalsIgnoreCase(uri.getScheme())) {
            //如果是content类型的uri，则进行普通处理
            imagePath = getImagePath(uri, null);
        } else if ("file".equalsIgnoreCase(uri.getScheme())) {
            //如果是file类型的uri，则直接获取路径
            imagePath = uri.getPath();
        }
        displayImage(imagePath);
    }

    
    private void displayImage(String imagePath) {
        if (imagePath != null) {
            Bitmap bitmap = BitmapFactory.decodeFile(imagePath);
            addressImage.setImageBitmap(bitmap);
        } else {
            Toast.makeText(getActivity(), "failed to get image", Toast.LENGTH_SHORT).show();
        }
    }

    
    private String getImagePath(Uri uri, String selection) {
        String path = null;
        Cursor cursor = getActivity().getContentResolver().query(uri, null, selection, null, null);
        if (cursor != null) {
            if (cursor.moveToFirst()) {
                path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
            }
            cursor.close();
        }
        return path;
    }