Question

我正在尝试将位图保存到我的目录，但没有一点麻烦。

我的应用程序的作用是：

1.通过Intent打开内置摄像头应用程序。

public void openCamera() {
        Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        File file = new File(Environment.getExternalStorageDirectory()+ File.separator + "image.jpg");
        takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));
        startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);
    }

2.然后将图片意图存储到'REQUEST_IMAGE_CAPTURE'并将图像保存到临时目录中。

startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE);

3.然后将其转换为位图并从tmp目录加载到图像视图

 protected void onActivityResult(int requestCode, int resultCode, Intent data){
        //Check that request code matches ours:
        if (requestCode == REQUEST_IMAGE_CAPTURE){
            //Get our saved file into a bitmap object:
            File file = new File(Environment.getExternalStorageDirectory()+File.separator + "image.jpg");
            Bitmap image = decodeSampledBitmapFromFile(file.getAbsolutePath(), 1000, 700);
            imageView.setImageBitmap(image);
        }
    }

现在，我如何将imageview中的位图保存到图片目录中？

我已将权限输入我的清单

<uses-feature android:name="android.hardware.camera"
    android:required="true" />
...
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
...
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

Answer 1

使用bitmap.compress将位图指向OutputStream。

例如：

FileOutputStream fo = new FileOutputStream(filename);
bmp.compress(Bitmap.CompressFormat.PNG, 100, fo); // bmp is your Bitmap

Answer 2

   private void saveImage(Bitmap bmp, String filePath){

    File file = new File(filePath);
    FileOutputStream fo = null;
    try {
        boolean result = file.createNewFile(); // true if created, false if exists or failed
        fo = new FileOutputStream(file);
        bmp.compress(Bitmap.CompressFormat.JPEG, IMAGE_QUALITY_PERCENT, fo);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        if (fo != null) {
            try {
                fo.flush();
                fo.close();
            } catch (Exception ignored) {

            }
        }
    }
}

请注意，filePath是目录+文件名，例如/sdcard/iamges/1.jpg

Android：将图像保存到目录

2 个答案: