android 获取图片

Android获取手机或者内存卡里面的图片有两种方式
1.这是通过一种action

        Intent intent=new Intent();        intent.setAction(Intent.ACTION_GET_CONTENT);        intent.setType("image/*");        startActivityForResult(intent, MAIN_PIC);

2.这是通过另一个中action

        Intent intent=new Intent();        intent.setAction(Intent.ACTION_PICK);        //EXTERNAL_CONTENT_URI 是外部的存储uri//      INTERNAL_CONTENT_URI是内部的存储uri        intent.setData(MediaStore.Images.Media.EXTERNAL_CONTENT_URI);        startActivityForResult(intent, MAIN_PIC);

然后在onActivityResult里面进行操作

@Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        // TODO Auto-generated method stub        super.onActivityResult(requestCode, resultCode, data);        Uri uri = data.getData();        Bitmap bitmap;        try {            bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(uri));            imageview.setImageBitmap(bitmap);            } catch (FileNotFoundException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }            /* 将Bitmap设定到ImageView */            String[] proj = {MediaStore.Images.Media.DATA};        //好像是android多媒体数据库的封装接口，具体的看Android文档        Cursor cursor = managedQuery(uri, proj, null, null, null);         //按我个人理解 这个是获得用户选择的图片的索引值        int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);        //将光标移至开头 ，这个很重要，不小心很容易引起越界        cursor.moveToFirst();        //最后根据索引值获取图片路径        String path = cursor.getString(column_index);        Toast.makeText(this, path, 1).show();    }

得到uri之后，一般需要查询，然后得到结果集，里面就是图片的路径。

case REQ_CODE_PICTURE:                  Uri uri = data.getData();                 Cursor cursor = getContentResolver().query(uri, null, null,                          null, null);                 cursor.moveToFirst();                 try {                      srcpath = cursor.getString(1);                     Log.i("OnActivtyResult",                              "File path :[" + cursor.getColumnCount() + srcpath                                      + "]");                     //MediaStore.Images.Media.DATA                    InputStream is = new FileInputStream(cursor.getString(1));                     Bitmap bmp = ImageLoader.createBitmap(is, 1);                     ivIcon.setImageBitmap(bmp);                 } catch (Exception e) {                      e.printStackTrace();                 }                  break;             }

protected String getAbsoluteImagePath(Uri uri) {        // can post image        String[] proj = { MediaStore.Images.Media.DATA };        Cursor cursor = managedQuery(uri, proj, // Which columns to return                null, // WHERE clause; which rows to return (all rows)                null, // WHERE clause selection arguments (none)                null); // Order-by clause (ascending by name)        if (cursor != null) {            int column_index = cursor                    .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);            cursor.moveToFirst();            return cursor.getString(column_index);        } else {            // 如果游标为空说明获取的已经是绝对路径了            return uri.getPath();        }    }

更多相关文章

随机推荐