Android EditText和TextView图文混排

想在EditText和TextView控件中随时插入手机本地图片，主要借助于android提供的两个类ImageSpan和SpannableString。如，在EditText中插入图片，分为3步：
1、扫描手机，选择图片：
Intent的Type设置为image/*表示任意格式的图片

    private void choosePictureFromGallery() {
        Intent intent = new Intent(Intent.ACTION_PICK);
        intent.setType("image/*");
        startActivityForResult(intent, CHOOSEPICTUREFROMGALLERY);
    }

2、重写Activity的onActivityResult()方法：

  case CHOOSEPICTUREFROMGALLERY:
                if (data != null) { Uri uri_picture = data.getData(); ContentResolver resolver = CreateNewDiaryActivity.this.getContentResolver(); Cursor cursor = resolver.query(uri_picture, null, null, null, MediaStore.Images.Media.DATE_MODIFIED); cursor.moveToFirst(); int idx = cursor.getColumnIndexOrThrow(MediaStore.Images.ImageColumns.DATA); picturePath = cursor.getString(idx); Bitmap bitmap = BitmapFactory.decodeFile(picturePath); if (bitmap != null) { SpannableString pictureString = getBitmapMime(bitmap, uri_picture); insertPictureToEditText(pictureString); }

                    cursor.close();

3、注意到插入图片用到了两个方法getBitmapMime()和insertPictureToEditText()：

private SpannableString getBitmapMime(Bitmap bitmap, Uri uri) {
        String path = uri.getPath();
        SpannableString ss = new SpannableString(path);

        ImageSpan span = new ImageSpan(CreateNewDiaryActivity.this, bitmap);

        ss.setSpan(span, 0, path.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);

        return ss;
    }

方法getBitmapMime作用是将插入的图片以ImageSpan表示，并替换掉uri.getPath，放入到SpannableString中，此时图片作为SpannableString字符串返回。

 private void insertPictureToEditText(SpannableString ss) {
        Editable et = et_content.getText();
        int start = et_content.getSelectionStart();
        et.insert(start, ss);

        et_content.setText(et);

        contentPictureStart = start;
        contentPictureEnd = start + ss.length();

        et_content.setSelection(start + ss.length());
        et_content.setFocusable(true);
        et_content.setFocusableInTouchMode(true);
    }

方法insertPictureToEditText，首先创建EditText的Editale对象，将SpannableString插入到EditText的编辑位置，插入结束后修改EditText的编辑位置，至此，图片成功插入到文字中。

在TextView中插入图片也是一样的道理：

   Bitmap bitmap = ImageProcess.resizeBitmap(diary_picPath, 100, 100);
            ImageSpan imageSpan = new ImageSpan(mContext, bitmap);
            SpannableString spannableString = new SpannableString("pic");
            spannableString.setSpan(imageSpan, 0, spannableString.length(), Spannable.SPAN_INCLUSIVE_EXCLUSIVE);

            picture_tv.setText(spannableString);