如何在多个图像视图中设置多个图像

Question

我是编程新手 android。我正在构建一个允许用户上传多张图片的应用程序，我正在使用两个图像视图，来自相机的图片设置一个图像视图，另一个图像视图设置另一个相机图片从中设置另一个图像和相同的图片来自 gallery.I 需要将 2 个不同的图像上传到不同的图像视图。我怎样才能上传？我附上了我的代码，请解决我的问题。

    public class MainActivity extends AppCompatActivity {
    ImageView imageView1, imageView2;
    private Button btn;
    private static final String IMAGE_DIRECTORY = "/demonuts";
    private int GALLERY = 1, CAMERA = 2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imageView1 = findViewById(R.id.image1);
        imageView2 = findViewById(R.id.image2);
        requestMultiplePermissions();

        btn = findViewById(R.id.btn);
        imageView1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showPictureDialog();
            }
        });

        imageView2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                 showPictureDialog();
            }
        });
    }

    private void showPictureDialog() {
        AlertDialog.Builder pictureDialog = new AlertDialog.Builder(this);
        pictureDialog.setTitle("Select Action");
        String[] pictureDialogItems = {
                "Select photo from gallery",
                "Capture photo from camera"};
        pictureDialog.setItems(pictureDialogItems,
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        switch (which) {
                            case 0:
                                choosePhotoFromGallary();
                                break;
                            case 1:
                                takePhotoFromCamera();
                                break;
                        }
                    }
                });
        pictureDialog.show();
    }

    public void choosePhotoFromGallary() {
        Intent galleryIntent = new Intent(Intent.ACTION_PICK,
                android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);

        startActivityForResult(galleryIntent, GALLERY);
    }

    private void takePhotoFromCamera() {
        Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
        startActivityForResult(intent, CAMERA);
    }

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

        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == this.RESULT_CANCELED) {
            return;
        }
        switch (requestCode) {
            case R.id.image1:
                if (requestCode == GALLERY) {
                    if (data != null) {
                        Uri contentURI = data.getData();
                        try {
                            Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), contentURI);
                            String path = saveImage(bitmap);
                            Toast.makeText(MainActivity.this, "Image Saved!", Toast.LENGTH_SHORT).show();
                            imageView1.setImageBitmap(bitmap);

                        } catch (IOException e) {
                            e.printStackTrace();
                            Toast.makeText(MainActivity.this, "Failed!", Toast.LENGTH_SHORT).show();
                        }
                    }

                } else if (requestCode == CAMERA) {
                    Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
                    imageView1.setImageBitmap(thumbnail);
                    saveImage(thumbnail);
                    Toast.makeText(MainActivity.this, "Image Saved!", Toast.LENGTH_SHORT).show();
                }

                break;
            case R.id.image2:
                if (requestCode == GALLERY) {
                    if (data != null) {
                        Uri contentURI = data.getData();
                        try {
                            Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), contentURI);
                            String path = saveImage(bitmap);
                            Toast.makeText(MainActivity.this, "Image Saved!", Toast.LENGTH_SHORT).show();
                            imageView2.setImageBitmap(bitmap);

                        } catch (IOException e) {
                            e.printStackTrace();
                            Toast.makeText(MainActivity.this, "Failed!", Toast.LENGTH_SHORT).show();
                        }
                    }

                } else if (requestCode == CAMERA) {
                    Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
                    imageView2.setImageBitmap(thumbnail);
                    saveImage(thumbnail);
                    Toast.makeText(MainActivity.this, "Image Saved!", Toast.LENGTH_SHORT).show();
                }
                break;
        }
    }

    public String saveImage(Bitmap myBitmap) {
        ByteArrayOutputStream bytes = new ByteArrayOutputStream();
        myBitmap.compress(Bitmap.CompressFormat.JPEG, 90, bytes);
        File wallpaperDirectory = new File(
                Environment.getExternalStorageDirectory() + IMAGE_DIRECTORY);
        // have the object build the directory structure, if needed.
        if (!wallpaperDirectory.exists()) {
            wallpaperDirectory.mkdirs();
        }

        try {
            File f = new File(wallpaperDirectory, Calendar.getInstance()
                    .getTimeInMillis() + ".jpg");
            f.createNewFile();
            FileOutputStream fo = new FileOutputStream(f);
            fo.write(bytes.toByteArray());
            MediaScannerConnection.scanFile(this,
                    new String[]{f.getPath()},
                    new String[]{"image/jpeg"}, null);
            fo.close();
            Log.d("TAG", "File Saved::--->" + f.getAbsolutePath());

            return f.getAbsolutePath();
        } catch (IOException e1) {
            e1.printStackTrace();
        }
        return "";
    }

    private void requestMultiplePermissions() {
        Dexter.withActivity(this)
                .withPermissions(
                        Manifest.permission.CAMERA,
                        Manifest.permission.WRITE_EXTERNAL_STORAGE,
                        Manifest.permission.READ_EXTERNAL_STORAGE)
                .withListener(new MultiplePermissionsListener() {
                    @Override
                    public void onPermissionsChecked(MultiplePermissionsReport report) {
                        // check if all permissions are granted
                        if (report.areAllPermissionsGranted()) {
                            Toast.makeText(getApplicationContext(), "All permissions are granted by user!", Toast.LENGTH_SHORT).show();
                        }

                        // check for permanent denial of any permission
                        if (report.isAnyPermissionPermanentlyDenied()) {
                            // show alert dialog navigating to Settings
                            //openSettingsDialog();
                        }
                    }

                    @Override
                    public void onPermissionRationaleShouldBeShown(List<com.karumi.dexter.listener.PermissionRequest> permissions, PermissionToken token) {
                        token.continuePermissionRequest();
                    }

                }).
                withErrorListener(new PermissionRequestErrorListener() {
                    @Override
                    public void onError(DexterError error) {
                        Toast.makeText(getApplicationContext(), "Some Error! ", Toast.LENGTH_SHORT).show();
                    }
                })
                .onSameThread()
                .check();
    }


}

Answer 1

public class MainActivity extends AppCompatActivity {
    ImageView imageView1, imageView2;
    private Button btn;
    private static final String IMAGE_DIRECTORY = "/demonuts";
    private int GALLERY = 1, CAMERA = 2;

    **private int clickImage;**

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imageView1 = findViewById(R.id.image1);
        imageView2 = findViewById(R.id.image2);
        requestMultiplePermissions();

        btn = findViewById(R.id.btn);
        imageView1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
            **clickImage=1;**
                showPictureDialog();
            }
        });

        imageView2.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
            **clickImage=2;**
                 showPictureDialog();
            }
        });
    }

    private void showPictureDialog() {
        AlertDialog.Builder pictureDialog = new AlertDialog.Builder(this);
        pictureDialog.setTitle("Select Action");
        String[] pictureDialogItems = {
                "Select photo from gallery",
                "Capture photo from camera"};
        pictureDialog.setItems(pictureDialogItems,
                new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        switch (which) {
                            case 0:
                                choosePhotoFromGallary();
                                break;
                            case 1:
                                takePhotoFromCamera();
                                break;
                        }
                    }
                });
        pictureDialog.show();
    }

    public void choosePhotoFromGallary() {
        Intent galleryIntent = new Intent(Intent.ACTION_PICK,
                android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);

        startActivityForResult(galleryIntent, GALLERY);
    }

    private void takePhotoFromCamera() {
        Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
        startActivityForResult(intent, CAMERA);
    }

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

        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == this.RESULT_CANCELED) {
            return;
        }
        switch (**clickImage**) {
            case 1:
                if (requestCode == GALLERY) {
                    if (data != null) {
                        Uri contentURI = data.getData();
                        try {
                            Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), contentURI);
                            String path = saveImage(bitmap);
                            Toast.makeText(MainActivity.this, "Image Saved!", Toast.LENGTH_SHORT).show();
                            imageView1.setImageBitmap(bitmap);

                        } catch (IOException e) {
                            e.printStackTrace();
                            Toast.makeText(MainActivity.this, "Failed!", Toast.LENGTH_SHORT).show();
                        }
                    }

                } else if (requestCode == CAMERA) {
                    Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
                    imageView1.setImageBitmap(thumbnail);
                    saveImage(thumbnail);
                    Toast.makeText(MainActivity.this, "Image Saved!", Toast.LENGTH_SHORT).show();
                }

                break;
            case 2:
                if (requestCode == GALLERY) {
                    if (data != null) {
                        Uri contentURI = data.getData();
                        try {
                            Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), contentURI);
                            String path = saveImage(bitmap);
                            Toast.makeText(MainActivity.this, "Image Saved!", Toast.LENGTH_SHORT).show();
                            imageView2.setImageBitmap(bitmap);

                        } catch (IOException e) {
                            e.printStackTrace();
                            Toast.makeText(MainActivity.this, "Failed!", Toast.LENGTH_SHORT).show();
                        }
                    }

                } else if (requestCode == CAMERA) {
                    Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
                    imageView2.setImageBitmap(thumbnail);
                    saveImage(thumbnail);
                    Toast.makeText(MainActivity.this, "Image Saved!", Toast.LENGTH_SHORT).show();
                }
                break;
        }
    }

    public String saveImage(Bitmap myBitmap) {
        ByteArrayOutputStream bytes = new ByteArrayOutputStream();
        myBitmap.compress(Bitmap.CompressFormat.JPEG, 90, bytes);
        File wallpaperDirectory = new File(
                Environment.getExternalStorageDirectory() + IMAGE_DIRECTORY);
        // have the object build the directory structure, if needed.
        if (!wallpaperDirectory.exists()) {
            wallpaperDirectory.mkdirs();
        }

        try {
            File f = new File(wallpaperDirectory, Calendar.getInstance()
                    .getTimeInMillis() + ".jpg");
            f.createNewFile();
            FileOutputStream fo = new FileOutputStream(f);
            fo.write(bytes.toByteArray());
            MediaScannerConnection.scanFile(this,
                    new String[]{f.getPath()},
                    new String[]{"image/jpeg"}, null);
            fo.close();
            Log.d("TAG", "File Saved::--->" + f.getAbsolutePath());

            return f.getAbsolutePath();
        } catch (IOException e1) {
            e1.printStackTrace();
        }
        return "";
    }

    private void requestMultiplePermissions() {
        Dexter.withActivity(this)
                .withPermissions(
                        Manifest.permission.CAMERA,
                        Manifest.permission.WRITE_EXTERNAL_STORAGE,
                        Manifest.permission.READ_EXTERNAL_STORAGE)
                .withListener(new MultiplePermissionsListener() {
                    @Override
                    public void onPermissionsChecked(MultiplePermissionsReport report) {
                        // check if all permissions are granted
                        if (report.areAllPermissionsGranted()) {
                            Toast.makeText(getApplicationContext(), "All permissions are granted by user!", Toast.LENGTH_SHORT).show();
                        }

                        // check for permanent denial of any permission
                        if (report.isAnyPermissionPermanentlyDenied()) {
                            // show alert dialog navigating to Settings
                            //openSettingsDialog();
                        }
                    }

                    @Override
                    public void onPermissionRationaleShouldBeShown(List<com.karumi.dexter.listener.PermissionRequest> permissions, PermissionToken token) {
                        token.continuePermissionRequest();
                    }

                }).
                withErrorListener(new PermissionRequestErrorListener() {
                    @Override
                    public void onError(DexterError error) {
                        Toast.makeText(getApplicationContext(), "Some Error! ", Toast.LENGTH_SHORT).show();
                    }
                })
                .onSameThread()
                .check();
    }


}

如何在多个图像视图中设置多个图像

How to set multiple image in multiple imageview

camera

android

gallery

android-intent

imageview