首先,使用java把图片加密;
// 加密后,会在原图片的路径下生成加密后的图片
public static void encrypt(String filePath) {
byte[] tempbytes = new byte[5000];
try {
InputStream in = new FileInputStream(filePath);
OutputStream out = new FileOutputStream(filePath.subSequence(0, filePath.lastIndexOf(".")) + "2.png");
while (in.read(tempbytes) != -1) {// 简单的交换
byte a = tempbytes[0];
tempbytes[0] = tempbytes[1];
tempbytes[1] = a;
out.write(tempbytes);// 写文件
}
} catch (IOException e) {
e.printStackTrace();
}
}
//调用加密方法
KMD.encrypt("D:/connectus.png");
然后把生成的图片放在assets文件夹下;
代码调用;
public static Bitmap getImageFromAssets(Context context, String fileName) {
Bitmap image = null;
AssetManager am = context.getResources().getAssets();
try {
InputStream is = am.open(fileName);
byte[] buffer = new byte[1500000];//足够大
is.read(buffer);
for(int i=0; i<buffer.length; i+= 5000){//与加密相同
byte temp = buffer[i];
buffer[i] = buffer[i+1];
buffer[i+1] = temp;
}
image = BitmapFactory.decodeByteArray(buffer, 0, buffer.length);
if (is!=null){
is.close();
}
} catch (IOException e) {
e.printStackTrace();
}
return image;
}
Bitmap bitmap = getImageFromAssets(this,"to.png")
原地址给忘记了,不好意思哈,找到之后再加上去。