Facebook隐藏 - 图像加密和解密 [英] Facebook Conceal - Image Encryption and Decryption
问题描述
我正在尝试使用Facebook隐藏库加密和解密图像。这是我第一次使用它,因此如果它微不足道,就忍受我。我已经看过关于SO的其他问题,以了解我的例外情况的原因,我无法让它工作。
这是我现在所做的。 ..
集成:我正在使用Eclipse,因此,从这里,并将jar文件添加到libs文件夹和.so文件到libs文件夹中的相应文件夹。
我的场景:
我必须从相机捕获图像,将其加密并存储在手机内存中。解密它并在图像视图中显示。在稍后的阶段,我还需要从内存中解密该图像并通过网络发送。
所以,我的代码如下...
@Override
protected void onActivityResult(int requestCode,int resultCode,Intent data){
if( Const.DEBUGGING){
Log.d(Const.DEBUG,RequestCode:+ requestCode +\\\
ResultCode:
+ resultCode);
}
int tag = getRecordCount();
tag ++;
if(requestCode == KTP_PICTURE_REQUEST_CODE){
if(resultCode == RESULT_OK){
ENCRYPTEDFILENAME = tag +_+ KTP_TAG +.png ;
saveFile((Bitmap)data.getExtras()。get(data),requestCode);
位图decryptptedImage = decodeFile(ENCRYPTEDFILENAME);
mImgBtnKtppicture.setImageBitmap(decryptptedImage);
} else if(resultCode == RESULT_CANCELED){
if(Const.DEBUGGING)
Log.d(Const.DEBUG,KTP_RESULT CANCELED);
} else {
}
}
if(requestCode == PROFILE_PICTURE_REQUEST_CODE){
if(resultCode == RESULT_OK){
ENCRYPTEDFILENAME = tag +_+ PROFILE_TAG +.png;
saveFile((Bitmap)data.getExtras()。get(data),requestCode);
位图decryptptedImage = decodeFile(ENCRYPTEDFILENAME);
mImgBtnPicture.setImageBitmap(decryptptedImage);
} else if(resultCode == RESULT_CANCELED){
if(Const.DEBUGGING)
Log.d(Const.DEBUG,PICTURE_RESULT CANCELED);
} else {
}
}
}
SaveFile():
public void saveFile(Bitmap photo,int code){
try {
ContextWrapper cw = new ContextWrapper(getApplicationContext());
文件目录= cw.getDir(DIRECTORY,Context.MODE_PRIVATE);
文件mypath =新文件(目录,ENCRYPTEDFILENAME);
if(code == KTP_PICTURE_REQUEST_CODE){
mKtppicture = Uri.fromFile(mypath).toString();
if(Const.DEBUGGING)
Log.d(Const.DEBUG,KTP Picture Path:+ mKtppicture);
} else if(code == PROFILE_PICTURE_REQUEST_CODE){
mPicture = Uri.fromFile(mypath).toString();
if(Const.DEBUGGING)
Log.d(Const.DEBUG,Profile Picture Path:+ mPicture);
}
加密加密=新加密(
new SharedPrefsBackedKeyChain(this),
new SystemNativeCryptoLibrary());
if(!crypto.isAvailable()){
return;
}
OutputStream fileStream = new BufferedOutputStream(
new FileOutputStream(mypath));
OutputStream outputStream = crypto.getCipherOutputStream(
fileStream,新的Entity(Password));
ObjectOutputStream objectOutputStream = new ObjectOutputStream(outputStream);
objectOutputStream.write(bitmapToBytes(photo));
objectOutputStream.close(); //具有异常的行
} catch(FileNotFoundException e){
e.printStackTrace();
} catch(IOException e){
e.printStackTrace();
} catch(Exception e){
e.printStackTrace();
}
}
bitmapToBytes():
private byte [] bitmapToBytes(Bitmap photo){
ByteArrayOutputStream stream = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.PNG,100,stream);
byte [] byteArray = stream.toByteArray();
return byteArray;
}
decodeFile():
{pre>
私有位图decodeFile(String filename){
加密加密=新加密(
new SharedPrefsBackedKeyChain(this),
new SystemNativeCryptoLibrary ());
ContextWrapper cw = new ContextWrapper(getApplicationContext());
文件目录= cw.getDir(DIRECTORY,Context.MODE_PRIVATE);
文件文件=新文件(目录,文件名);
try {
FileInputStream fileStream = new FileInputStream(file);
InputStream inputStream = crypto.getCipherInputStream(
fileStream,
new Entity(Password));
ObjectInputStream objectInputStream = new ObjectInputStream(inputStream);
Bitmap bitmap = bytesToBitmap((byte [])objectInputStream.readObject());
返回位图;
} catch(Exception e){
e.printStackTrace();
}
返回null;
}
bytesToBitmap():
私人位图bytesToBitmap(byte [] bytes){
位图位图= BitmapFactory.decodeByteArray(bytes,0,bytes.length);
返回位图;
}
当我尝试保存图像时,我得到一个UnsupportedOperationException在 objectOutputStream.close();
在saveFile()
Logcat跟踪:
10-01 16:55:34.529:W / System.err(31291):java.lang.UnsupportedOperationException
10-01 16:55:34.529: System.err(31291):在com.facebook.crypto.streams.NativeGCMCipherOutputStream.write(NativeGCMCipherOutputStream.java:93)
10-01 16:55:34.529:W / System.err(31291):在java .io.DataOutputStream.writeByte(DataOutputStream.java:144)
10-01 16:55:34.529:W / System.err(31291):在java.io.ObjectOutputStream.drain(ObjectOutputStream.java:394)
10-01 16:55:34.529:W / System.err(31291):java.io.ObjectOutputStream.flush(ObjectOutputStream.java:461)
10-01 16:55:34.529: W / System.err(31291):在java.io.ObjectOutputStream.close(ObjectOutputStream.java:337)
10-01 16:55:34.529:W / System.err(31291):在com.xx .xxx.RegistrationActivity.sa veFile(RegistrationActivity.java:761)
10-01 16:55:34.529:W / System.err(31291):at com.xx.xxx.RegistrationActivity.onActivityResult(RegistrationActivity.java:639)
10-01 16:55:34.529:W / System.err(31291):在android.app.Activity.dispatchActivityResult(Activity.java:5423)
10-01 16:55:34.529:W /系统.err(31291):at android.app.ActivityThread.deliverResults(ActivityThread.java:3347)
10-01 16:55:34.529:W / System.err(31291):在android.app.ActivityThread。 handleSendResult(ActivityThread.java:3394)
10-01 16:55:34.529:W / System.err(31291):at android.app.ActivityThread.access $ 1300(ActivityThread.java:135)
10-01 16:55:34.529:W / System.err(31291):at android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1244)
10-01 16:55:34.529:W / System.err(31291):在android.os.Handler.dispatchMessage(Handler.java:102)
10-01 16:55:34.529:W / System.err(31291):在android.os.Looper .loop(Looper.java:136)
10-01 16:55:34.529:W / System.err 31291):at android.app.ActivityThread.main(ActivityThread.java:5001)
10-01 16:55:34.529:W / System.err(31291):在java.lang.reflect.Method.invokeNative (Native Method)
10-01 16:55:34.529:W / System.err(31291):在java.lang.reflect.Method.invoke(Method.java:515)
10-01 16:55:34.529:W / System.err(31291):at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:785)
10-01 16:55:34.529:W /System.err(31291):at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
10-01 16:55:34.529:W / System.err(31291):at dalvik.system.NativeStart.main(Native Method)
10-01 16:55:34.529:W / System.err(31291):java.io.IOException:意外加密版本-1
10- 01 16:55:34.529:W / System.err(31291):在com.facebook.crypto.util.Assertions.checkArgumentForIO(Assertions.java:29)
10-01 16:55:34.539:W / System.err(31291):在com.facebook.crypto.CipherHelper.getCipherInputStream(CipherHelper.java:52)
10-01 16:55:34.539:W / S ystem.err(31291):at com.facebook.crypto.Crypto.getCipherInputStream(Crypto.java:83)
10-01 16:55:34.539:W / System.err(31291):at com.xx .xxx.RegistrationActivity.decodeFile(RegistrationActivity.java:821)
10-01 16:55:34.539:W / System.err(31291):at com.xx.xxx.RegistrationActivity.onActivityResult(RegistrationActivity.java: 640)
10-01 16:55:34.539:W / System.err(31291):at android.app.Activity.dispatchActivityResult(Activity.java:5423)
10-01 16:55: 34.539:W / System.err(31291):在android.app.ActivityThread.deliverResults(ActivityThread.java:3347)
10-01 16:55:34.539:W / System.err(31291):在android .app.ActivityThread.handleSendResult(ActivityThread.java:3394)
10-01 16:55:34.539:W / System.err(31291):at android.app.ActivityThread.access $ 1300(ActivityThread.java:135 )
10-01 16:55:34.539:W / System.err(31291):android.app.ActivityThread $ H.handleMessage(ActivityThread.java:1244)
10-01 16:55 :34.539:W / System.err(31291):在android .os.Handler.dispatchMessage(Handler.java:102)
10-01 16:55:34.539:W / System.err(31291):在android.os.Looper.loop(Looper.java:136)
10-01 16:55:34.539:W / System.err(31291):在android.app.ActivityThread.main(ActivityThread.java:5001)
10-01 16:55:34.539: W / System.err(31291):at java.lang.reflect.Method.invokeNative(Native Method)
10-01 16:55:34.539:W / System.err(31291):在java.lang。 ()方法.java:785)
10-01 16:55:34.549:W / System.err(31291):在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
10-01 16:55:34.549:W / System.err(31291):at dalvik.system.NativeStart.main(Native Method)
10-01 16:55:34.549:D / BAT(31291): onResume调用
感谢您的帮助...
这是我如何解决问题.. enc解密和解密工作正常。
//加密图像并保存到目录
public void encodeAndSaveFile(Bitmap photo,int code){
try {
ContextWrapper cw = new ContextWrapper(getApplicationContext());
文件目录= cw.getDir(DIRECTORY,Context.MODE_PRIVATE);
文件mypath =新文件(目录,ENCRYPTEDFILENAME);
加密加密=新加密(新的SharedPrefsBackedKeyChain(this),
new SystemNativeCryptoLibrary());
if(!crypto.isAvailable()){
return;
}
OutputStream fileStream = new BufferedOutputStream(
new FileOutputStream(mypath));
OutputStream outputStream = crypto.getCipherOutputStream(
fileStream,新实体(密码));
outputStream.write(bitmapToBytes(photo));
outputStream.close();
} catch(UnsupportedOperationException e){
e.printStackTrace();
} catch(FileNotFoundException e){
e.printStackTrace();
} catch(IOException e){
e.printStackTrace();
} catch(Exception e){
e.printStackTrace();
}
}
//将位图转换为字节
private byte [] bitmapToBytes(Bitmap photo){
ByteArrayOutputStream stream = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.PNG,100,stream);
byte [] byteArray = stream.toByteArray();
return byteArray;
}
//将字节转换为位图
私有位图bytesToBitmap(byte [] bytes){
位图位图= BitmapFactory.decodeByteArray(bytes, 0,bytes.length);
返回位图;
}
//解码加密文件并返回Bitmap
私有位图decodeFile(String filename){
加密加密=新加密(新SharedPrefsBackedKeyChain(这个),
new SystemNativeCryptoLibrary());
ContextWrapper cw = new ContextWrapper(getApplicationContext());
文件目录= cw.getDir(DIRECTORY,Context.MODE_PRIVATE);
文件文件=新文件(目录,文件名);
try {
FileInputStream fileStream = new FileInputStream(file);
InputStream inputStream = crypto.getCipherInputStream(fileStream,
new Entity(Password));
ByteArrayOutputStream out = new ByteArrayOutputStream();
int read;
byte [] buffer = new byte [1024];
while((read = inputStream.read(buffer))!= -1){
out.write(buffer,0,read);
}
inputStream.close();
位图位图= bytesToBitmap(out.toByteArray());
返回位图;
} catch(Exception e){
e.printStackTrace();
}
返回null;
}
以下是我在onActivityResult中调用encodeAndSaveFile()和decodeFile()的方式(),从相机返回。
encodeAndSaveFile((Bitmap)data.getExtras()。get(data
requestCode);
位图decryptptedImage = decodeFile(ENCRYPTEDFILENAME);
I am trying to encrypt and decrypt image using Facebook Conceal Library. This is the first time i am using it and hence bear with me if its trivial. I have looked at other questions on SO to figure out the reasons for my exceptions, my i couldn't get it working.
Here is what I have done till now...
Integrating: I am using Eclipse and hence, downloaded crypto.jar and libs.zip from here and added the jar file to libs folder and .so files to respective folder inside libs folder.
My scenario:
I have to capture an image from camera, encrypt and store it on my phone memory. Decrypt it and show it in an imageview. At a later stage, i also need to decrypt this image from the memory and send it over network.
So, my code goes as below...
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (Const.DEBUGGING) {
Log.d(Const.DEBUG, "RequestCode: " + requestCode + "\nResultCode:"
+ resultCode);
}
int tag = getRecordCount();
tag++;
if (requestCode == KTP_PICTURE_REQUEST_CODE) {
if (resultCode == RESULT_OK) {
ENCRYPTEDFILENAME = tag + "_" + KTP_TAG + ".png";
saveFile((Bitmap) data.getExtras().get("data"), requestCode);
Bitmap decryptedImage = decodeFile(ENCRYPTEDFILENAME);
mImgBtnKtppicture.setImageBitmap(decryptedImage);
} else if (resultCode == RESULT_CANCELED) {
if (Const.DEBUGGING)
Log.d(Const.DEBUG, "KTP_RESULT CANCELED");
} else {
}
}
if (requestCode == PROFILE_PICTURE_REQUEST_CODE) {
if (resultCode == RESULT_OK) {
ENCRYPTEDFILENAME = tag + "_" + PROFILE_TAG + ".png";
saveFile((Bitmap) data.getExtras().get("data"), requestCode);
Bitmap decryptedImage = decodeFile(ENCRYPTEDFILENAME);
mImgBtnPicture.setImageBitmap(decryptedImage);
} else if (resultCode == RESULT_CANCELED) {
if (Const.DEBUGGING)
Log.d(Const.DEBUG, "PICTURE_RESULT CANCELED");
} else {
}
}
}
SaveFile():
public void saveFile(Bitmap photo, int code) {
try {
ContextWrapper cw = new ContextWrapper(getApplicationContext());
File directory = cw.getDir(DIRECTORY, Context.MODE_PRIVATE);
File mypath = new File(directory, ENCRYPTEDFILENAME);
if (code == KTP_PICTURE_REQUEST_CODE) {
mKtppicture = Uri.fromFile(mypath).toString();
if (Const.DEBUGGING)
Log.d(Const.DEBUG, "KTP Picture Path: " + mKtppicture);
} else if (code == PROFILE_PICTURE_REQUEST_CODE) {
mPicture = Uri.fromFile(mypath).toString();
if (Const.DEBUGGING)
Log.d(Const.DEBUG, "Profile Picture Path: " + mPicture);
}
Crypto crypto = new Crypto(
new SharedPrefsBackedKeyChain(this),
new SystemNativeCryptoLibrary());
if (!crypto.isAvailable()) {
return;
}
OutputStream fileStream = new BufferedOutputStream(
new FileOutputStream(mypath));
OutputStream outputStream = crypto.getCipherOutputStream(
fileStream, new Entity("Password"));
ObjectOutputStream objectOutputStream = new ObjectOutputStream(outputStream);
objectOutputStream.write(bitmapToBytes(photo));
objectOutputStream.close(); //Line with exception
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
bitmapToBytes():
private byte[] bitmapToBytes(Bitmap photo) {
ByteArrayOutputStream stream = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();
return byteArray;
}
decodeFile():
private Bitmap decodeFile(String filename) {
Crypto crypto = new Crypto(
new SharedPrefsBackedKeyChain(this),
new SystemNativeCryptoLibrary());
ContextWrapper cw = new ContextWrapper(getApplicationContext());
File directory = cw.getDir(DIRECTORY, Context.MODE_PRIVATE);
File file = new File(directory, filename);
try{
FileInputStream fileStream = new FileInputStream(file);
InputStream inputStream = crypto.getCipherInputStream(
fileStream,
new Entity("Password"));
ObjectInputStream objectInputStream = new ObjectInputStream(inputStream);
Bitmap bitmap = bytesToBitmap((byte[])objectInputStream.readObject());
return bitmap;
}catch (Exception e) {
e.printStackTrace();
}
return null;
}
bytesToBitmap():
private Bitmap bytesToBitmap(byte[] bytes) {
Bitmap bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
return bitmap;
}
When i try to save the image, i get a UnsupportedOperationException at objectOutputStream.close();
in saveFile()
Logcat Trace:
10-01 16:55:34.529: W/System.err(31291): java.lang.UnsupportedOperationException
10-01 16:55:34.529: W/System.err(31291): at com.facebook.crypto.streams.NativeGCMCipherOutputStream.write(NativeGCMCipherOutputStream.java:93)
10-01 16:55:34.529: W/System.err(31291): at java.io.DataOutputStream.writeByte(DataOutputStream.java:144)
10-01 16:55:34.529: W/System.err(31291): at java.io.ObjectOutputStream.drain(ObjectOutputStream.java:394)
10-01 16:55:34.529: W/System.err(31291): at java.io.ObjectOutputStream.flush(ObjectOutputStream.java:461)
10-01 16:55:34.529: W/System.err(31291): at java.io.ObjectOutputStream.close(ObjectOutputStream.java:337)
10-01 16:55:34.529: W/System.err(31291): at com.xx.xxx.RegistrationActivity.saveFile(RegistrationActivity.java:761)
10-01 16:55:34.529: W/System.err(31291): at com.xx.xxx.RegistrationActivity.onActivityResult(RegistrationActivity.java:639)
10-01 16:55:34.529: W/System.err(31291): at android.app.Activity.dispatchActivityResult(Activity.java:5423)
10-01 16:55:34.529: W/System.err(31291): at android.app.ActivityThread.deliverResults(ActivityThread.java:3347)
10-01 16:55:34.529: W/System.err(31291): at android.app.ActivityThread.handleSendResult(ActivityThread.java:3394)
10-01 16:55:34.529: W/System.err(31291): at android.app.ActivityThread.access$1300(ActivityThread.java:135)
10-01 16:55:34.529: W/System.err(31291): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244)
10-01 16:55:34.529: W/System.err(31291): at android.os.Handler.dispatchMessage(Handler.java:102)
10-01 16:55:34.529: W/System.err(31291): at android.os.Looper.loop(Looper.java:136)
10-01 16:55:34.529: W/System.err(31291): at android.app.ActivityThread.main(ActivityThread.java:5001)
10-01 16:55:34.529: W/System.err(31291): at java.lang.reflect.Method.invokeNative(Native Method)
10-01 16:55:34.529: W/System.err(31291): at java.lang.reflect.Method.invoke(Method.java:515)
10-01 16:55:34.529: W/System.err(31291): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
10-01 16:55:34.529: W/System.err(31291): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
10-01 16:55:34.529: W/System.err(31291): at dalvik.system.NativeStart.main(Native Method)
10-01 16:55:34.529: W/System.err(31291): java.io.IOException: Unexpected crypto version -1
10-01 16:55:34.529: W/System.err(31291): at com.facebook.crypto.util.Assertions.checkArgumentForIO(Assertions.java:29)
10-01 16:55:34.539: W/System.err(31291): at com.facebook.crypto.CipherHelper.getCipherInputStream(CipherHelper.java:52)
10-01 16:55:34.539: W/System.err(31291): at com.facebook.crypto.Crypto.getCipherInputStream(Crypto.java:83)
10-01 16:55:34.539: W/System.err(31291): at com.xx.xxx.RegistrationActivity.decodeFile(RegistrationActivity.java:821)
10-01 16:55:34.539: W/System.err(31291): at com.xx.xxx.RegistrationActivity.onActivityResult(RegistrationActivity.java:640)
10-01 16:55:34.539: W/System.err(31291): at android.app.Activity.dispatchActivityResult(Activity.java:5423)
10-01 16:55:34.539: W/System.err(31291): at android.app.ActivityThread.deliverResults(ActivityThread.java:3347)
10-01 16:55:34.539: W/System.err(31291): at android.app.ActivityThread.handleSendResult(ActivityThread.java:3394)
10-01 16:55:34.539: W/System.err(31291): at android.app.ActivityThread.access$1300(ActivityThread.java:135)
10-01 16:55:34.539: W/System.err(31291): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1244)
10-01 16:55:34.539: W/System.err(31291): at android.os.Handler.dispatchMessage(Handler.java:102)
10-01 16:55:34.539: W/System.err(31291): at android.os.Looper.loop(Looper.java:136)
10-01 16:55:34.539: W/System.err(31291): at android.app.ActivityThread.main(ActivityThread.java:5001)
10-01 16:55:34.539: W/System.err(31291): at java.lang.reflect.Method.invokeNative(Native Method)
10-01 16:55:34.539: W/System.err(31291): at java.lang.reflect.Method.invoke(Method.java:515)
10-01 16:55:34.539: W/System.err(31291): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:785)
10-01 16:55:34.549: W/System.err(31291): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
10-01 16:55:34.549: W/System.err(31291): at dalvik.system.NativeStart.main(Native Method)
10-01 16:55:34.549: D/BAT(31291): onResume called
Thanks for your help...
Here is how i solved the problem.. encryption and decryption works fine now.
// Encrypts the image and saves to directory
public void encodeAndSaveFile(Bitmap photo, int code) {
try {
ContextWrapper cw = new ContextWrapper(getApplicationContext());
File directory = cw.getDir(DIRECTORY, Context.MODE_PRIVATE);
File mypath = new File(directory, ENCRYPTEDFILENAME);
Crypto crypto = new Crypto(new SharedPrefsBackedKeyChain(this),
new SystemNativeCryptoLibrary());
if (!crypto.isAvailable()) {
return;
}
OutputStream fileStream = new BufferedOutputStream(
new FileOutputStream(mypath));
OutputStream outputStream = crypto.getCipherOutputStream(
fileStream, new Entity("Password"));
outputStream.write(bitmapToBytes(photo));
outputStream.close();
} catch (UnsupportedOperationException e) {
e.printStackTrace();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
// convert Bitmap to bytes
private byte[] bitmapToBytes(Bitmap photo) {
ByteArrayOutputStream stream = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();
return byteArray;
}
// convert bytes to Bitmap
private Bitmap bytesToBitmap(byte[] bytes) {
Bitmap bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
return bitmap;
}
// decode encrypted file and returns Bitmap
private Bitmap decodeFile(String filename) {
Crypto crypto = new Crypto(new SharedPrefsBackedKeyChain(this),
new SystemNativeCryptoLibrary());
ContextWrapper cw = new ContextWrapper(getApplicationContext());
File directory = cw.getDir(DIRECTORY, Context.MODE_PRIVATE);
File file = new File(directory, filename);
try {
FileInputStream fileStream = new FileInputStream(file);
InputStream inputStream = crypto.getCipherInputStream(fileStream,
new Entity("Password"));
ByteArrayOutputStream out = new ByteArrayOutputStream();
int read;
byte[] buffer = new byte[1024];
while ((read = inputStream.read(buffer)) != -1) {
out.write(buffer, 0, read);
}
inputStream.close();
Bitmap bitmap = bytesToBitmap(out.toByteArray());
return bitmap;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
Here is how i am calling encodeAndSaveFile() and decodeFile(), in onActivityResult(), after returning from camera.
encodeAndSaveFile((Bitmap) data.getExtras().get("data"),
requestCode);
Bitmap decryptedImage = decodeFile(ENCRYPTEDFILENAME);
这篇关于Facebook隐藏 - 图像加密和解密的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!