如何在Android中将位图转换为jpeg文件? [英] How to convert a bitmap to a jpeg file in Android?

问题描述

我有一个裁剪的位图图像，我需要将它保存到一个 jpeg 文件中.

提前致谢

解决方案

使用这个:

位图 bmp = null;ByteArrayOutputStream 流 = new ByteArrayOutputStream();bmp.compress(Bitmap.CompressFormat.JPEG, 100, 流);byte[] byteArray = stream.toByteArray();

为此你可以使用这个:

FileInputStream fileInputStream = null;File file = new File("你的文件");byteArray = new byte[(int) file.length()];尝试 {//将文件转换为字节数组fileInputStream = new FileInputStream(file);fileInputStream.read(bFile);fileInputStream.close();//将字节数组转换为文件FileOutputStream 文件输出流 =new FileOutputStream("C:\testing2.txt");文件输出流.write(bFile);文件输出流.close();System.out.println("完成");} 捕获(异常 e){e.printStackTrace();}

以及更多信息，请访问这里

I have a cropped bitmap image and I need to save it into a jpeg file.

Thanks in advance

解决方案

Use this:

Bitmap bmp = null;
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bmp.compress(Bitmap.CompressFormat.JPEG, 100, stream);
byte[] byteArray = stream.toByteArray();

for that you can use this:

FileInputStream fileInputStream = null;

File file = new File("yourfile");

byteArray = new byte[(int) file.length()];

try {
    //convert file into array of bytes
    fileInputStream = new FileInputStream(file);
    fileInputStream.read(bFile);
    fileInputStream.close();

    //convert array of bytes into file
    FileOutputStream fileOuputStream =
            new FileOutputStream("C:\testing2.txt");
    fileOuputStream.write(bFile);
    fileOuputStream.close();

    System.out.println("Done");
} catch (Exception e) {
    e.printStackTrace();
}

and also for more info go with here

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