如何使用imageview onclick保存位图图像

<ImageView
    android:id="@+id/imageView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@drawable/image"
    android:onClick="saveImage" />

public void saveImage(View view) {
    // 获取ImageView中的位图
    ImageView imageView = (ImageView) view;
    Bitmap bitmap = ((BitmapDrawable) imageView.getDrawable()).getBitmap();

    // 保存位图到本地存储
    String fileName = "image.jpg";
    File file = new File(getExternalFilesDir(null), fileName);
    try {
        FileOutputStream fos = new FileOutputStream(file);
        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
        fos.flush();
        fos.close();
    } catch (IOException e) {
        e.printStackTrace();
    }

    // 显示保存成功的提示信息
    Toast.makeText(this, "Image saved successfully", Toast.LENGTH_SHORT).show();
}

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />