java - 在 Android 中拍照后验证按钮

Question

在 Android 中拍照后的按钮验证。在我的活动中，我实现了两个带有默认图像的图像视图（图像视图 1 和图像视图 2）和两个打开设备相机的按钮（按钮 1 和按钮 2），当从按钮拍摄照片时，完成验证以更改图像视图图像（按钮 1 -> imageview1，button2 -> imageview2）。

我想进行第三次验证，验证照片是否已从两个按钮中获取。

如何验证两个按钮上的照片何时已拍摄？

这是我的代码

ImageView imageV, imageV2;
Button btn1, btn2;
static final int IMAGE_REQUEST = 1;
static final int IMAGE_REQUEST_2 = 2;
private static final int PERMISSION_REQUEST = 2;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

imageV = findViewById(R.id.image_view);
imageV2 = findViewById(R.id.image_view_2);
btn1= findViewById(R.id.button_1);
btn2= findViewById(R.id.button_2);

btn1.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
       Intent camara = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
       if (camara.resolveActivity(getPackageManager()) != null) {
          startActivityForResult(camara, IMAGE_REQUEST);
       }
    }
});

btn2.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
       Intent camara = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
       if (camara.resolveActivity(getPackageManager()) != null) {
          startActivityForResult(camara, IMAGE_REQUEST_2);
       }
    }
 });
}

@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == IMAGE_REQUEST) {
        if (resultCode == Activity.RESULT_OK) {
      
        imageV.setImageResource(R.drawable.image_view_2do);

    }
    else if (requestCode == IMAGE_REQUEST_2) {
        if (resultCode == Activity.RESULT_OK) {
        
            imageV2.setImageResource(R.drawable.image_view2_2do);
        }
    }
    // This is where the code fails me 
    //how can I validate if the photos are already taken on the two buttons?
    else if (requestCode == IMAGE_REQUEST && requestCode == IMAGE_REQUEST_2) {
        if (resultCode == Activity.RESULT_OK) {
            imageV.setImageResource(R.drawable.image_view_2do);
            imageV2.setImageResource(R.drawable.image_view2_2do);
        }
    }
 }
}

标签： javaandroidvalidationonactivityresult

Answer 1

我注意到您正在将 requestCode 的值与IMAGE_REQUEST和 next 进行比较IMAGE_REQUEST_2。

之后，在代码中断的部分中，您将在一行中比较两者。但是我相信这永远不会起作用，因为 requestCode 只有一个值，并且您将它与两个不同的值进行比较 [IMAGE_REQUEST, IMAGE_REQUEST_2]

我建议您每次使用该按钮拍照时将 IMAGE_REQUEST_2 和 IMAGE_REQUEST 添加到数组中。

然后比较两个值是否存在于该数组中，如果是，你就做你想做的事。

像那样：

ImageView imageV, imageV2;
Button btn1, btn2;
static final int IMAGE_REQUEST = 1;
static final int IMAGE_REQUEST_2 = 2;
private static final int PERMISSION_REQUEST = 2;

// creates a new list to store the photos taken
List<int> requestsMade = new ArrayList<int>();

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

imageV = findViewById(R.id.image_view);
imageV2 = findViewById(R.id.image_view_2);
btn1= findViewById(R.id.button_1);
btn2= findViewById(R.id.button_2);

btn1.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
       Intent camara = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
       if (camara.resolveActivity(getPackageManager()) != null) {
          startActivityForResult(camara, IMAGE_REQUEST);
       }
    }
});

btn2.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
       Intent camara = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
       if (camara.resolveActivity(getPackageManager()) != null) {
          startActivityForResult(camara, IMAGE_REQUEST_2);
       }
    }
 });

@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == IMAGE_REQUEST) {
        if (resultCode == Activity.RESULT_OK) {
      
        imageV.setImageResource(R.drawable.image_view_2do);
        // first photo taken
        requestsMade.add(IMAGE_REQUEST);

    }
    else if (requestCode == IMAGE_REQUEST_2) {
        if (resultCode == Activity.RESULT_OK) {
        
            imageV2.setImageResource(R.drawable.image_view2_2do);
            requestsMade.add(IMAGE_REQUEST_2);
            // second photo taken

        }
    }
    // now this compares if both are taken
    else if (requestsMade.contains(IMAGE_REQUEST) && requestsMade.contains(IMAGE_REQUEST_2)) {
        if (resultCode == Activity.RESULT_OK) {
            imageV.setImageResource(R.drawable.image_view_2do);
            imageV2.setImageResource(R.drawable.image_view2_2do);
        }
    }
 }
}