[英]How to convert Uri image into Base64?
我編寫代碼將圖像從文件位置轉換為base64。 我可以很容易地從絕對文件位置將圖像轉換為base64,如: C:/ Users / Java Engineer / Desktop / test / gallery / magar / Kanuglam.jpg ,但我無法從位置轉換為
。 我想轉換圖像在web服務的android中使用。 這是代碼示例:
/**
* TEST JSON
*/
String convertToJsonArrayWithImageForMovieDetailTest(ResultSet rs) {
System.out.println("I am insied json converter");
JSONArray list = new JSONArray();
JSONObject obj ;
//File file;
File locatedFile;
FileInputStream fileInputStream;
try {
while (rs.next()) {
obj = new JSONObject();
System.out.println("inside RS");
System.out.println("date is there ha ha ");
obj.put("movie_name", rs.getString("name"));
obj.put("movie_gener", rs.getString("type"));
String is_free_stuff = rs.getString("is_free_stuff");
if (is_free_stuff == "no") {
is_free_stuff = "PAID";
} else {
is_free_stuff = "FREE";
}
obj.put("movie_type", is_free_stuff);
//String movie_image = rs.getString("preview_image");
//this does not work
String movie_image = "http://www.hamropan.com/stores/slider/2016-09-10-852311027.jpg";
//this works for me
// file = new File("C:/Users/Java Engineer/Desktop/Nike Zoom Basketball.jpg");
locatedFile = new File(movie_image);
// Reading a Image file from file system
fileInputStream = new FileInputStream(locatedFile);
if (locatedFile == null) {
obj.put("movie_image", "NULL");
} else {
byte[] iarray = new byte[(int) locatedFile.length()];
fileInputStream.read(iarray);
byte[] img64 = com.sun.jersey.core.util.Base64
.encode(iarray);
String imageString = new String(img64);
obj.put("movie_image", imageString);
}
list.add(obj);
}
} catch (Exception e) {
e.printStackTrace();
}
return list.toString();
}
這段代碼對我有用,但看起來很慢
public String imageConvertMethod(String url) throws Exception{
ByteArrayOutputStream output = new ByteArrayOutputStream();
try (InputStream input = new URL(url).openStream()) {
byte[] buffer = new byte[512];
for (int length = 0; (length = input.read(buffer)) > 0;) {
output.write(buffer, 0, length);
}
}
byte [] byte_array = output.toByteArray();
byte[] img64 = com.sun.jersey.core.util.Base64
.encode(byte_array);
String imageString = new String(img64);
return imageString;
}
好的,試試這個
bitmap = getBitmapFromUrl(image_url);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
byte[] array = stream.getByteArray();
encoded_string = Base64.encodeToString(array, 0);
方法從網址加載圖片
public static Bitmap getBitmapFromURL(String src) {
try {
URL url = new URL(src);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
Bitmap myBitmap = BitmapFactory.decodeStream(input);
return myBitmap;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
@thanks到Fabio Venturi牧師
嘗試這個:
ImageUri到位圖:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == TAKE_PHOTO_CODE && resultCode == RESULT_OK) {
final Uri imageUri = data.getData();
final InputStream imageStream = getContentResolver().openInputStream(imageUri);
final Bitmap selectedImage = BitmapFactory.decodeStream(imageStream);
String encodedImage = encodeImage(selectedImage);
}
}
在base64中編碼位圖
private String encodeImage(Bitmap bm)
{
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.JPEG,100,baos);
byte[] b = baos.toByteArray();
String encImage = Base64.encodeToString(b, Base64.DEFAULT);
return encImage;
}
從FilePath編碼到base64
private String encodeImage(String path)
{
File imagefile = new File(path);
FileInputStream fis = null;
try{
fis = new FileInputStream(imagefile);
}catch(FileNotFoundException e){
e.printStackTrace();
}
Bitmap bm = BitmapFactory.decodeStream(fis);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bm.compress(Bitmap.CompressFormat.JPEG,100,baos);
byte[] b = baos.toByteArray();
String encImage = Base64.encodeToString(b, Base64.DEFAULT);
//Base64.de
return encImage;
}
輸出:
參考: 拍照並轉換為Base64
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