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我正在使用相机中的 takePicture 功能在平板电脑上连续拍摄和存储照片。我需要知道如何裁剪在调用 takePicture 时存储的数据。或者,如果这不可能,那么我需要知道如何读取图像,然后使用其他东西来裁剪它。到目前为止,我发现此问题的唯一解决方案需要打开另一个应用程序进行裁剪。任何帮助表示赞赏。

4

2 回答 2

2

您可以尝试以下代码来裁剪图像:

final String Path = "sdcard/test.jpg";
 Bitmap bitmap = BitmapFactory.decodeFile(Path);
 ivSign.setImageBitmap(Bitmap.createScaledBitmap(bitmap, 150, 150, true));
 Intent cropIntent = new Intent("com.android.camera.action.CROP");
 // indicate image type and Uri
 cropIntent.setDataAndType(Uri.fromFile(new File(Path)), "image/*");
 // set crop properties
 cropIntent.putExtra("crop", "true");
 // indicate aspect of desired crop
 cropIntent.putExtra("aspectX", 1);
 cropIntent.putExtra("aspectY", 1);
 // indicate output X and Y
 cropIntent.putExtra("outputX", 256);
 cropIntent.putExtra("outputY", 256);
 // retrieve data on return
 cropIntent.putExtra("return-data", true);
 // start the activity - we handle returning in onActivityResult
 startActivityForResult(cropIntent, 1);
于 2013-02-02T03:54:11.270 回答
0

从下面的代码中,您将获得正确的想法。如果设备类似于三星 Galaxy S3 并且您想在捕获后裁剪图像,有时您会遇到问题,因为它们 在捕获图像后返回空意图。

在这个问题上花了几个小时后,如果将来有人遇到这个问题,我终于可以通过下面的方式让它工作。

public class MainActivity extends Activity {
    private Uri mImageCaptureUri;
    private ImageView mImageView;

    private static final int PICK_FROM_CAMERA = 1;
    private static final int CROP_FROM_CAMERA = 2;
    private static final int PICK_FROM_FILE = 3;

    private String selectedImagePath = "";
    boolean GallaryPhotoSelected = false;

    public static String Finalmedia = "";

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

        setContentView(R.layout.main);

        final String[] items = new String[] { "Take from camera",
                "Select from gallery" };
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                android.R.layout.select_dialog_item, items);
        AlertDialog.Builder builder = new AlertDialog.Builder(this);

        builder.setTitle("Select Image");
        builder.setAdapter(adapter, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int item) { // pick from
                                                                    // camera
                if (item == 0) {
                    String storageState = Environment.getExternalStorageState();

                    if (storageState.equals(Environment.MEDIA_MOUNTED)) {
                        Intent intent = new Intent(
                                MediaStore.ACTION_IMAGE_CAPTURE);
                        // intent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT,
                        // mImageCaptureUri);
                        // if (hasImageCaptureBug()) {

                        String path = Environment.getExternalStorageDirectory()
                                .getName()
                                + File.separatorChar
                                + System.currentTimeMillis() + ".jpg";
                        File file = new File(path);
                        // mImageCaptureUri = Uri.fromFile(new File(
                        // Environment.getExternalStorageDirectory(),
                        // "tmp_avatar_"
                        // + String.valueOf(System
                        // .currentTimeMillis())
                        // + ".jpg"));
                        Log.i("TAG", "Final  path" + path);
                        try {
                            if (file.exists() == false) {
                                file.getParentFile().mkdirs();
                                file.createNewFile();
                            }

                        } catch (IOException e) {
                            Log.e("TAG", "Could not create file.", e);
                        }
                        mImageCaptureUri = Uri.fromFile(file);
                        intent.putExtra(
                                android.provider.MediaStore.EXTRA_OUTPUT,
                                mImageCaptureUri);
                        // } else {
                        // intent.putExtra(
                        // android.provider.MediaStore.EXTRA_OUTPUT,
                        // android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                        // }

                        try {
                            // intent.putExtra("return-data", true);
                            startActivityForResult(intent, PICK_FROM_CAMERA);
                        } catch (ActivityNotFoundException e) {
                            e.printStackTrace();
                        }
                    } else {
                        new AlertDialog.Builder(MainActivity.this)
                                .setMessage(
                                        "External Storeage (SD Card) is required.\n\nCurrent state: "
                                                + storageState)
                                .setCancelable(true).create().show();
                    }

                } else { // pick from file
                    Intent intent = new Intent();

                    intent.setType("image/*");
                    intent.setAction(Intent.ACTION_GET_CONTENT);

                    startActivityForResult(Intent.createChooser(intent,
                            "Complete action using"), PICK_FROM_FILE);
                }
            }
        });

        final AlertDialog dialog = builder.create();

        Button button = (Button) findViewById(R.id.btn_crop);
        mImageView = (ImageView) findViewById(R.id.iv_photo);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                dialog.show();
            }
        });
    }

    public boolean hasImageCaptureBug() {

        // list of known devices that have the bug
        ArrayList<String> devices = new ArrayList<String>();
        devices.add("android-devphone1/dream_devphone/dream");
        devices.add("generic/sdk/generic");
        devices.add("vodafone/vfpioneer/sapphire");
        devices.add("tmobile/kila/dream");
        devices.add("verizon/voles/sholes");
        devices.add("google_ion/google_ion/sapphire");

        return devices.contains(android.os.Build.BRAND + "/"
                + android.os.Build.PRODUCT + "/" + android.os.Build.DEVICE);

    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (resultCode != RESULT_OK)
            return;

        switch (requestCode) {
        case PICK_FROM_CAMERA:
            Log.i("TAG", "Inside PICK_FROM_CAMERA");
            // mImageCaptureUri = data.getData();
            // Bitmap bm1 = (Bitmap) data.getExtras().get("data");
            // mImageView.setImageBitmap(bm1);
            // Bundle extras1 = data.getExtras();
            // Bitmap bm1 = (Bitmap) extras1.get("data");
            // mImageView.setImageBitmap(bm1);

            /*
             * try { if (hasImageCaptureBug()) { Log.i("TAG", "Inside Bug");
             * selectedImagePath = String.valueOf(System .currentTimeMillis()) +
             * ".jpg"; File fi = new File(
             * Environment.getExternalStorageDirectory(), selectedImagePath);
             * try { mImageCaptureUri = Uri
             * .parse(android.provider.MediaStore.Images.Media
             * .insertImage(getContentResolver(), fi.getAbsolutePath(), null,
             * null)); if (!fi.delete()) { Log.i("logMarker",
             * "Failed to delete " + fi); } } catch (FileNotFoundException e) {
             * e.printStackTrace(); } } else { mImageCaptureUri =
             * data.getData(); } } catch (Exception e) { Log.i("TAG",
             * "Inside Bug"); selectedImagePath =
             * String.valueOf(System.currentTimeMillis()) + ".jpg"; File fi =
             * new File(Environment.getExternalStorageDirectory(),
             * selectedImagePath); try { mImageCaptureUri = Uri
             * .parse(android.provider.MediaStore.Images.Media
             * .insertImage(getContentResolver(), fi.getAbsolutePath(), null,
             * null)); if (!fi.delete()) { Log.i("logMarker",
             * "Failed to delete " + fi); } } catch (FileNotFoundException e1) {
             * e1.printStackTrace(); } }
             */

            String path = mImageCaptureUri.getPath();
            Log.i("TAG",
                    "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!After capture path "
                            + path);

            doCrop();

            break;

        case PICK_FROM_FILE:
            mImageCaptureUri = data.getData();
            Log.i("TAG",
                    "After Crop mImageCaptureUri " + mImageCaptureUri.getPath());
            GallaryPhotoSelected = true;
            doCrop();

            break;

        case CROP_FROM_CAMERA:
            Bundle extras = data.getExtras();

            selectedImagePath = mImageCaptureUri.getPath();

            Log.i("TAG", "After Crop selectedImagePath " + selectedImagePath);

            if (GallaryPhotoSelected) {
                selectedImagePath = getRealPathFromURI(mImageCaptureUri);
                Log.i("TAG", "Absolute Path " + selectedImagePath);
                GallaryPhotoSelected = true;
            }

            Finalmedia = selectedImagePath;

            if (extras != null) {
                // Bitmap photo = extras.getParcelable("data");
                Log.i("TAG", "Inside Extra " + selectedImagePath);
                Bitmap photo = (Bitmap) extras.get("data");

                selectedImagePath = String.valueOf(System.currentTimeMillis())
                        + ".jpg";

                Log.i("TAG", "new selectedImagePath before file "
                        + selectedImagePath);

                File file = new File(Environment.getExternalStorageDirectory(),
                        selectedImagePath);

                try {
                    file.createNewFile();
                    FileOutputStream fos = new FileOutputStream(file);
                    photo.compress(Bitmap.CompressFormat.PNG, 95, fos);
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    Toast.makeText(this,
                            "Sorry, Camera Crashed-Please Report as Crash A.",
                            Toast.LENGTH_LONG).show();
                }

                selectedImagePath = Environment.getExternalStorageDirectory()
                        + "/" + selectedImagePath;
                Log.i("TAG", "After File Created  " + selectedImagePath);

                Bitmap bm = decodeFile(selectedImagePath);
                mImageView.setImageBitmap(bm);
            }

            /*
             * File f = new File(mImageCaptureUri.getPath());
             * 
             * if (f.exists()) f.delete();
             */

            break;

        }
    }

    public static Bitmap decodeFile(String path) {
        int orientation;
        try {
            if (path == null) {
                return null;
            }
            // decode image size
            BitmapFactory.Options o = new BitmapFactory.Options();
            o.inJustDecodeBounds = true;
            // Find the correct scale value. It should be the power of 2.
            final int REQUIRED_SIZE = 70;
            int width_tmp = o.outWidth, height_tmp = o.outHeight;
            int scale = 1;
            // while (true) {
            // if (width_tmp / 2 < REQUIRED_SIZE
            // || height_tmp / 2 < REQUIRED_SIZE)
            // break;
            // width_tmp /= 2;
            // height_tmp /= 2;
            // scale++;
            // }
            // decode with inSampleSize
            BitmapFactory.Options o2 = new BitmapFactory.Options();
            o2.inSampleSize = scale;
            Bitmap bm = BitmapFactory.decodeFile(path, o2);
            Bitmap bitmap = bm;

            ExifInterface exif = new ExifInterface(path);

            orientation = exif
                    .getAttributeInt(ExifInterface.TAG_ORIENTATION, 1);

            Log.e("ExifInteface .........", "rotation =" + orientation);

            // exif.setAttribute(ExifInterface.ORIENTATION_ROTATE_90, 90);

            Log.e("orientation", "" + orientation);
            Matrix m = new Matrix();

            if ((orientation == ExifInterface.ORIENTATION_ROTATE_180)) {
                m.postRotate(180);
                // m.postScale((float) bm.getWidth(), (float) bm.getHeight());
                // if(m.preRotate(90)){
                Log.e("in orientation", "" + orientation);
                bitmap = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(),
                        bm.getHeight(), m, true);
                return bitmap;
            } else if (orientation == ExifInterface.ORIENTATION_ROTATE_90) {
                m.postRotate(90);
                Log.e("in orientation", "" + orientation);
                bitmap = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(),
                        bm.getHeight(), m, true);
                return bitmap;
            } else if (orientation == ExifInterface.ORIENTATION_ROTATE_270) {
                m.postRotate(270);
                Log.e("in orientation", "" + orientation);
                bitmap = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(),
                        bm.getHeight(), m, true);
                return bitmap;
            }
            return bitmap;
        } catch (Exception e) {
            return null;
        }

    }

    public String getRealPathFromURI(Uri contentUri) {
        String[] proj = { MediaStore.Images.Media.DATA };
        Cursor cursor = managedQuery(contentUri, proj, null, null, null);
        int column_index = cursor
                .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        return cursor.getString(column_index);
    }

    private void doCrop() {
        final ArrayList<CropOption> cropOptions = new ArrayList<CropOption>();

        Intent intent = new Intent("com.android.camera.action.CROP");
        intent.setType("image/*");

        List<ResolveInfo> list = getPackageManager().queryIntentActivities(
                intent, 0);

        int size = list.size();

        if (size == 0) {
            Toast.makeText(this, "Can not find image crop app",
                    Toast.LENGTH_SHORT).show();

            return;
        } else {

            intent.setData(mImageCaptureUri);
            intent.setClassName("com.android.camera",
                    "com.android.camera.CropImage");
            intent.putExtra("outputX", 100);
            intent.putExtra("outputY", 100);
            intent.putExtra("aspectX", 1);
            intent.putExtra("aspectY", 1);
            intent.putExtra("scale", true);
            intent.putExtra("return-data", true);
            // startActivityForResult(intent, CROP_FROM_CAMERA);

            if (size == 1) {
                Intent i = new Intent(intent);
                ResolveInfo res = list.get(0);

                i.setComponent(new ComponentName(res.activityInfo.packageName,
                        res.activityInfo.name));

                startActivityForResult(i, CROP_FROM_CAMERA);
            } else {
                for (ResolveInfo res : list) {
                    final CropOption co = new CropOption();

                    co.title = getPackageManager().getApplicationLabel(
                            res.activityInfo.applicationInfo);
                    co.icon = getPackageManager().getApplicationIcon(
                            res.activityInfo.applicationInfo);
                    co.appIntent = new Intent(intent);

                    co.appIntent
                            .setComponent(new ComponentName(
                                    res.activityInfo.packageName,
                                    res.activityInfo.name));

                    cropOptions.add(co);
                }

                CropOptionAdapter adapter = new CropOptionAdapter(
                        getApplicationContext(), cropOptions);

                AlertDialog.Builder builder = new AlertDialog.Builder(this);
                builder.setTitle("Choose Crop App");
                builder.setAdapter(adapter,
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int item) {
                                startActivityForResult(
                                        cropOptions.get(item).appIntent,
                                        CROP_FROM_CAMERA);
                            }
                        });

                builder.setOnCancelListener(new DialogInterface.OnCancelListener() {
                    @Override
                    public void onCancel(DialogInterface dialog) {

                        if (mImageCaptureUri != null) {
                            getContentResolver().delete(mImageCaptureUri, null,
                                    null);
                            mImageCaptureUri = null;
                        }
                    }
                });

                AlertDialog alert = builder.create();

                alert.show();
            }
        }
    }
}
于 2013-02-02T04:40:09.807 回答