android - 从图库中选择图像或从相机拍摄

Question

我必须制作一个按钮，提供从图库中选择图像或从相机拍摄的图像。

 private void showFileChooser() {
    Intent takePicture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    startActivityForResult(takePicture, 0);
    Intent pickPhoto = new Intent(Intent.ACTION_PICK,
            android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
    startActivityForResult(pickPhoto , 1);

}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) {
    super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
    switch(requestCode) {
        case 0:
            if(resultCode == RESULT_OK){
                Uri selectedImage = imageReturnedIntent.getData();
                imageView.setImageURI(selectedImage);
            }

            break;
        case 1:
            if(resultCode == RESULT_OK){
                Uri selectedImage = imageReturnedIntent.getData();
                imageView.setImageURI(selectedImage);
            }
            break;
    }
}

结果是有效的。如果我从图库中选择，图像查看器将查看它，如果我选择从相机拍照，它也可以工作。 问题是，在我的 showFileChooser() 方法中，我的所有 Intent 都同时运行，所以当我从图库中选择时，相机也在运行。我选择相机，画廊也正在开放。我想我应该在 switch case 模式下实现我的代码，但我不知道该怎么做。请帮助解决我的初学者问题。

Answer 1

添加一个 alertDialog，然后在 onActivityResult 中使用 REQUEST_CAMERA 和 SELECT_FILE 而不是 0 和 1 的情况.您将在代码中声明:

private static final int REQUEST_CAMERA = 1;
private static final int SELECT_FILE = 2;

final CharSequence[] items = {"Take Photo", "Choose from Library", "Cancel"};
            android.app.AlertDialog.Builder builder = new android.app.AlertDialog.Builder(mActivity);
            builder.setTitle("Add Photo!");
            builder.setItems(items, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int item) {

                    if (items[item].equals("Take Photo")) {
                        PROFILE_PIC_COUNT = 1;
                        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                        startActivityForResult(intent, REQUEST_CAMERA);
                    } else if (items[item].equals("Choose from Library")) {
                        PROFILE_PIC_COUNT = 1;
                        Intent intent = new Intent(
                                Intent.ACTION_PICK,
                                MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                        startActivityForResult(intent,SELECT_FILE);
                    } else if (items[item].equals("Cancel")) {
                        PROFILE_PIC_COUNT = 0;
                        dialog.dismiss();
                    }
                }
            }); 
            builder.show();