Android从相册、照相机选择图片（支持4.4+，KIKAT以上）

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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。

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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, // Whichnull, // 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

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