当我在Android中输入data.getExtras()时，它会出错，我应该怎么做呢？

Question

我正在youtube上学习一个视频教程来制作相机应用程序

https://www.youtube.com/watch?v=GH9CPeurBco

在6:42，他写了data.getExtras();。当我试图键入时，我在.getExtras();上得到了无法解决method' getExtra()'的错误“。我键入的和他完全一样。我现在该怎么办？

这里是代码：

 protected void onActivityResult(int requestcode, int resultcode, int data) {
    if (requestcode == Activity_Start_Camera_App && requestcode == RESULT_OK) {
        //Toast.makeText(this, "picture taken successfull", Toast.LENGTH_SHORT).show()
        Bundle extras = data.getExtras();
        Bitmap photoCapturedBitmap = (Bitmap) extras.get("data");
        mPhotoCapturedImageView.setImageBitmap(photoCapturedBitmap);
    }

Answer 1

您重写了一个错误的方法。第三个参数是Intent而不是int

实际的方法是：

 @Override
 protected void onActivityResult(int requestcode, int resultcode, Intent data) {
    if (requestcode == Activity_Start_Camera_App && requestcode == RESULT_OK) {

    //Toast.makeText(this, "picture taken successfull", Toast.LENGTH_SHORT).show()
    Bundle extras = data.getExtras();
    Bitmap photoCapturedBitmap = (Bitmap) extras.get("data");
    mPhotoCapturedImageView.setImageBitmap(photoCapturedBitmap);
}

Answer 2

您重写了错误的方法。

它应该是：

protected void onActivityResult(int requestcode, int resultcode, Intent data) {
    if (requestcode == Activity_Start_Camera_App && requestcode == RESULT_OK) {
        //Toast.makeText(this, "picture taken successfull", Toast.LENGTH_SHORT).show()
        Bundle extras = data.getExtras();
        Bitmap photoCapturedBitmap = (Bitmap) extras.get("data");
        mPhotoCapturedImageView.setImageBitmap(photoCapturedBitmap);
    }