我如何从意图中获取 Uri？

Question

我做到了

@Override
public void onClick(View v) {
    switch (v.getId()){
        //если выбрали камеру - запускаем ее
        case R.id.b_camera:
            //uri = generateFileUri();
            if (uri == null) {
                Toast.makeText(getView().getContext(), getResources().getString(R.string.sdnot), Toast.LENGTH_LONG).show();
                return;
            }
            Intent intentCamera = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            intentCamera.putExtra(MediaStore.EXTRA_OUTPUT, uri);
            //intentCamera.putExtra("return-data", true);
            startActivityForResult(intentCamera, PHOTO_INTENT_REQUEST_CODE);
        break;
    }
}

方法 generateFileUri() 在 onCreateView() 中被调用。 行 intentCamera.putExtra("return-data", true);对我不起作用（如果在 getParceble() 的 onActivityResult 中使用“return-data”作为键）。

@Override
public void onActivityResult(int requestCode, int resultCode, Intent imageReturned) {

    switch (requestCode) {

        //если результат пришел от камеры
        case PHOTO_INTENT_REQUEST_CODE:
            if (resultCode == getActivity().RESULT_OK) {
                Log.i("HHHHHHHHHHHH", "result ok");
                //извлекаем uri фотки из интента
                Uri selectedImage = imageReturned.getData();
                Log.i("HHHHHHHHHHHH", "getdata works!");
                //создаем интент для запуска новой активити
                Intent last_intent_photo = new Intent(getView().getContext(), ViewPhoto.class);
                //помещаем в интент этот uri
                last_intent_photo.putExtra("fotka",selectedImage);
                //стартуем новую активити
                startActivity(last_intent_photo);

            } else if (resultCode == getActivity().RESULT_CANCELED)
                Toast.makeText(getView().getContext(), "Capture cancelled", Toast.LENGTH_LONG).show();
            else
                Toast.makeText(getView().getContext(), "Capture failed", Toast.LENGTH_LONG).show();
                break;
        default: super.onActivityResult(requestCode, resultCode, imageReturned);

    }
}

我看到日志“结果正常”。我认为这意味着相机做得很好。 但后来我看到：传递结果 ResultInfo{who=android:fragment:2, request=100, result=-1, data=null} 失败。怎么可能？！

好吧，我试过 Uri selectedImage = imageReturned.getExtras().getParcelable();但我没有将其放入 getParcelable(String key) 的意图。

那么，为什么结果没问题，但 data=null？

Answer 1

选项 1：

//Uri myUri = ...
intent.setData(myUri);

和

Uri uri = intent.getData();

选项 2：

根据文档：

toString() - 返回此 URI 的编码字符串表示形式

//Uri myUri = ...
intent.putStringExtra("uri",myUri.toString());

和

String uriString = intent.getStringExtra("uri");
Uri uri = Uri.parse(uriString);

Answer 2

既然您自己传递它，为什么需要从intert 获取uri？只需使用相同的uri：

intentCamera.putExtra(MediaStore.EXTRA_OUTPUT, uri);

UPD 澄清：

当您使用选项启动cameta时：

intentCamera.putExtra(MediaStore.EXTRA_OUTPUT, uri);

您是在告诉相机照片必须存储在此路径中。因此，如果结果正常，您需要通过此 uri 获取该照片。

 if (resultCode == getActivity().RESULT_OK) {
    Log.i("HHHHHHHHHHHH", "result ok");

    // same as passed in intentCamera.putExtra(MediaStore.EXTRA_OUTPUT, uri);
    Uri selectedImage = uri; 

    Log.i("HHHHHHHHHHHH", "getdata works!");
    //создаем интент для запуска новой активити
    Intent last_intent_photo = new Intent(getView().getContext(), ViewPhoto.class);
    //помещаем в интент этот uri
    last_intent_photo.putExtra("fotka",selectedImage);
    //стартуем новую активити
    startActivity(last_intent_photo);
} 

UPD 2

FragmentScaling.onActivityCreated：

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);

    if (getActivity().getIntent().hasExtra("uri")) {
        uri = (Uri)getActivity().getIntent().getParcelableExtra("uri");
    }
}

Answer 3

主活动

    public class MainActivity extends AppCompatActivity {

    FragmentManager fragmentManager;
    PreferenceHelper preferenceHelper;

    //вызывается при создании активити
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        PreferenceHelper.getInstance().init(getApplicationContext());
        preferenceHelper = PreferenceHelper.getInstance();

        fragmentManager = getFragmentManager();

        runSplash();

        setUI();
    }


    //метод для созданию интерфейса
    private void setUI(){
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        if (toolbar != null){
            toolbar.setTitleTextColor(getResources().getColor(R.color.white));
            setSupportActionBar(toolbar);
        }
        TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);
        tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_list_white_18dp).setText(R.string.listtab));
        tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_camera_alt_white_18dp).setText(R.string.scalingtab));
        tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_web_asset_white_18dp).setText(R.string.parsingtab));
        tabLayout.addTab(tabLayout.newTab().setIcon(R.drawable.ic_my_location_white_18dp).setText(R.string.maptab));

        final ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
        TabAdapter tabAdapter = new TabAdapter(fragmentManager, 4);
        viewPager.setAdapter(tabAdapter);
        viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));

        tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
            @Override
            public void onTabSelected(TabLayout.Tab tab) {
                viewPager.setCurrentItem(tab.getPosition());
            }

            @Override
            public void onTabUnselected(TabLayout.Tab tab) {

            }

            @Override
            public void onTabReselected(TabLayout.Tab tab) {

            }
        });
    }
}

我什至无法想象究竟在哪里寻找错误......

//получаем результат из галереи или камеры
@Override
public void onActivityResult(int requestCode, int resultCode, Intent imageReturned) {

    switch (requestCode) {

        //если результат пришел от камеры
        case PHOTO_INTENT_REQUEST_CODE:
            if (resultCode == getActivity().RESULT_OK && imageReturned != null) {
                Log.i("HHHHHHHHHHHH", "result ok"); // появляется в логе
                //извлекаем uri фотки из интента
                Uri selectedImage = uri;
                Log.i("HHHHHHHHHHHH", "getdata works!"); //в логе не появляется!
                //создаем интент для запуска новой активити
                Intent last_intent_photo = new Intent(getView().getContext(), ViewPhoto.class);
                //помещаем в интент этот uri
                last_intent_photo.putExtra("fotka", selectedImage);
                //стартуем новую активити
                startActivity(last_intent_photo);

            } else if (resultCode == getActivity().RESULT_CANCELED)
                Toast.makeText(getView().getContext(), "Capture cancelled", Toast.LENGTH_LONG).show();
            else
                Toast.makeText(getView().getContext(), "Capture failed", Toast.LENGTH_LONG).show();
                break;
        default: super.onActivityResult(requestCode, resultCode, imageReturned);

    }
}

Answer 4

最近 onActivityResult 已被弃用，因此

private val getIntent = registerForActivityResult(ActivityResultContracts.StartActivityForResult()) {
        if (it.resultCode == Activity.RESULT_OK) {
            if (it.data != null) {
                val imageUri = it.data!!.data as Uri
                val image = yourCustomMethod(imageUri)
            }
        }