Android从相册、照相机选择图片（支持4.4+，KIKAT以上）

开发都会遇到从手机的相册和照相机选择图片的功能，下面是一段通用的代码，用来选择手机中的图片，以后用的时候，直接调用就可以了。

使用到的类属性

public final static int CONSULT_DOC_PICTURE = 1000;
public final static int CONSULT_DOC_CAMERA = 1001;
private int SELECT_PICTURE = 0;
private int SELECT_CAMERA = 1;
private Bitmap bmp;
private Uri outputFileUri;
//从相册或照相机选择出的文件，可以用来判断是否上传
File selectImg;

弹出选择对话框

protected void createSelectImageDialog() {
  CharSequence[] items = { "相册", "照相机" };
  new AlertDialog.Builder(this).setTitle("选择图片来源").setItems(items, new DialogInterface.OnClickListener() {
   public void onClick(DialogInterface dialog, int which) {
    if (which == SELECT_PICTURE) {
     Intent intent = new Intent();
     if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
      intent.setAction(Intent.ACTION_GET_CONTENT);
     }
     else {
      intent.setAction(Intent.ACTION_OPEN_DOCUMENT);
      intent.addCategory(Intent.CATEGORY_OPENABLE);
     }
     intent.setType("image/*");
     startActivityForResult(Intent.createChooser(intent, "选择图片"), CONSULT_DOC_PICTURE);
    } else {
     File file = new File(Environment.getExternalStorageDirectory(), "avator.jpg");
     outputFileUri = Uri.fromFile(file);
     Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
     intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
     startActivityForResult(intent, CONSULT_DOC_CAMERA);
    }
   }
  }).create().show();
 }

获取返回的数据，因为使用的不是return-data，所以返回的是uri需要自己去查询一下真实路径

@SuppressLint("NewApi")
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  if (requestCode == CONSULT_DOC_PICTURE) {

   if(data == null){
    return;
   }
   if (bmp != null)// 如果不释放的话，不断取图片，将会内存不够
    bmp.recycle();
   if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT){
    Uri contentUri = data.getData();
    String wholeID = DocumentsContract.getDocumentId(contentUri);
    String id = wholeID.split(":")[1];
    String[] column = { MediaStore.Images.Media.DATA };
    String sel = MediaStore.Images.Media._ID + "=?";
    Cursor cursor = getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, column,
      sel, new String[] { id }, null);
    int columnIndex = cursor.getColumnIndex(column[0]);
    if (cursor.moveToFirst()) {
     String path = cursor.getString(columnIndex);
     bmp = BitmapFactory.decodeFile(path);
     avator.setImageBitmap(bmp);
     selectImg = new File(path);
    }
    cursor.close();
   }else{
    Uri uri = data.getData();
    String[] proj = { MediaStore.Images.Media.DATA };
    Cursor cursor = this.getContentResolver().query(uri, proj, // Which
      null, // WHERE clause; which rows to return (all rows)
      null, // WHERE clause selection arguments (none)
      null); // Order-by clause (ascending by name)
    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
    cursor.moveToFirst();
    String path = cursor.getString(column_index);
    bmp = BitmapFactory.decodeFile(path);
    avator.setImageBitmap(bmp);
    selectImg = new File(path);
    cursor.close();
   }
  } else if (requestCode == CONSULT_DOC_CAMERA) {
   bmp = BitmapFactory.decodeFile(outputFileUri.getPath());
   avator.setImageBitmap(bmp);
   selectImg = new File(outputFileUri.getPath());
  } else {
   Toast.makeText(this, "请重新选择图片", Toast.LENGTH_SHORT).show();
  }
 }

调用的时候只需要在触发事件中 直接调用createSelectImageDialog方法

选择出来的图片是原始图片，图片很大，不适于上传功能