[英]Converting a String to Bitmap, and Store it to SD Card
我想通过首先将返回的包含base64的JSONObject转换为SD卡,然后将其转换为位图来将图像存储到SD卡。 我尝试了下面的代码,但似乎没有任何效果。
PHP代码返回JSON对象:
$img = $row["imageName"];
$b64img = mysql_real_escape_string($b64img);
$b64img = base64_encode ($img);
$product["imageName"] = $b64img;
检索返回的JSON的Java代码:
for (int i = 0; i < products.length(); i++) {
JSONObject c = products.getJSONObject(i);
byte[] decodedString = Base64.decode(c.getString(TAG_IMAGE_NAME), Base64.DEFAULT);
Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
String fileN = (i+1)+".jpg";
OutputStream fOut = null;
File file = new File(Environment.getExternalStorageDirectory() + "/FinalTestforDatabase/",fileN);
try {
fOut = new FileOutputStream(file);
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
decodedByte.compress(Bitmap.CompressFormat.JPEG, 85, fOut);
try {
fOut.flush();
} catch (IOException e2) {
// TODO Auto-generated catch block
e2.printStackTrace();
}
try {
fOut.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
MediaStore.Images.Media.insertImage(getContentResolver(),file.getAbsolutePath(),file.getName(),file.getName());
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
我必须确保首先创建主文件夹以包含图像,然后在此之后执行以下代码。 接下来,要创建一个包含图像的新文件夹,所以我需要"/FolderName/FolderName2/"
。
OutputStream fOut = null;
File file = new File(
Environment.getExternalStorageDirectory()
+ "/FolderName/FolderName2/",
fileN);
try {
fOut = new FileOutputStream(file);
} catch (FileNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
decodedByte.compress(
Bitmap.CompressFormat.JPEG, 85, fOut);
try {
fOut.flush();
} catch (IOException e2) {
// TODO Auto-generated catch block
e2.printStackTrace();
}
try {
fOut.close();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
MediaStore.Images.Media.insertImage(
getContentResolver(),
file.getAbsolutePath(),
file.getName(), file.getName());
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
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