Question

我在MainActivity中实现了3个标签。第一个选项卡是图像片段，其中实现了2个按钮。第一是打开相机，第二是打开画廊。我想在名为Upload Activity的新活动中显示捕获或选定的图像。

图像片段

 @Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    //  return inflater.inflate(R.layout.fragment_images, container, false);
    View v = inflater.inflate(R.layout.fragment_images, container, false);
    FloatingActionButton btnCamera = (FloatingActionButton) v.findViewById(R.id.btnCamera);
    FloatingActionButton btnFolder = (FloatingActionButton) v.findViewById(R.id.btnFolder);

    btnCamera.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            File imageFolder = new File(Environment.getExternalStorageDirectory(), "/My Children");
            imageFolder.mkdir();
            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-mm-dd");
            String timestamp = simpleDateFormat.format(new Date());
            File image = new File(imageFolder, timestamp+ ".jpg");
            //    Uri uriImage = Uri.fromFile(image);
            Uri uriImage = FileProvider.getUriForFile(getActivity(), BuildConfig.APPLICATION_ID +  ".provider", image);
            Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
            intent.putExtra(MediaStore.EXTRA_OUTPUT, uriImage);
            getActivity().startActivityForResult(intent, TAKE_PICTURE);
        }
    });
    btnFolder.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Intent intent = new Intent();
            intent.setType("image/*");
            intent.setAction(Intent.ACTION_GET_CONTENT);
            getActivity().startActivityForResult(intent, SELECT_PICTURE);
        }
    });
    return v;

}
    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
 try {
if (requestCode == TAKE_PICTURE && resultCode == RESULT_OK) {
    Bundle extras = data.getExtras();
    Bitmap cam = (Bitmap) extras.get("data");
    Intent i = new Intent().setClass(getActivity(), Upload.class);
    i.putExtra("image", cam);
    startActivity(i);
}
if (requestCode == SELECT_PICTURE && requestCode == RESULT_OK) {
    Bitmap bitmap = (Bitmap) data.getExtras().get("data");
    Intent i = new Intent(getActivity(), Upload.class);
    i.putExtra("image", bitmap);
    startActivity(i);
}
}catch (Exception e){
e.printStackTrace();
}

还在MainActivity中添加了此代码

 @Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    Fragment page = getSupportFragmentManager().findFragmentByTag("android:switcher:" + R.id.vp_pages + ":" + vp_pages.getCurrentItem() );
    if (page != null){
        page.onActivityResult(requestCode, resultCode, data);
    }
}

这是我想要显示图片的上传课程

public class Upload extends AppCompatActivity {

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

    Button btnUpload = (Button) findViewById(R.id.btnUpload);

    ImageView imageview = (ImageView) findViewById(R.id.imageview);
    Intent intent = getIntent();
    Bitmap bitmap = (Bitmap) intent.getParcelableExtra("image");
    imageview.setImageBitmap(bitmap);
 }
 }

在上限或选择图像后，图像片段将打开而不是上传活动。

Answer 1

因为您要从图像片段启动相机或图库图像捕获，所以您只能从那里启动意图。

但问题是当你设置

时

intent.putExtra(MediaStore.EXTRA_OUTPUT, uriImage);

onActivityResult中的数据将为null，因为您已经给出了自己的uri。因此，对于相机请求，您可以通过全局存储来检查相机的温度uri。

Uri cameraUri;

然后

cameraUri = FileProvider.getUriForFile(getActivity(), BuildConfig.APPLICATION_ID +  ".provider", image);
            Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
            intent.putExtra(MediaStore.EXTRA_OUTPUT, cameraUri);
            getActivity().startActivityForResult(intent, TAKE_PICTURE);

此时uri指的是一些临时文件。相机只需单击并覆盖该文件即可。

所以现在得到如下结果。

@Override
 public void onActivityResult(int requestCode, int resultCode, Intent data) {
                super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == TAKE_PICTURE && resultCode == RESULT_OK) {
         Intent i = new Intent().setClass(getActivity(), Upload.class);
         //here pass the original uri that we stored while starting camera
         i.putExtra("image", cameraUri.toString());
         startActivity(i);
      }
      if (requestCode == SELECT_PICTURE && requestCode == RESULT_OK) {
         Intent i = new Intent(getActivity(), Upload.class);
         //this will return you data in case of open gallery
         i.putExtra("image", data.getData().toString());
         startActivity(i);
     }
    }

现在在另一个活动上收到此信息并显示

public class Upload extends AppCompatActivity {

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

    Button btnUpload = (Button) findViewById(R.id.btnUpload);

    ImageView imageview = (ImageView) findViewById(R.id.imageview);
    Intent intent = getIntent();
    if(intent==null){
     return;
    }
    Uri imageUri = Uri.parse(intent.getStringExtra("image"));
    imageview.setImageURI(imageUri);
 }
 }

onActivityResult未从标签片段

1 个答案: