如何从Android 7.0中的相机或图库中选择裁剪图像？

概述从图库和相机中选择裁剪图像在Android7.0以下完成,但在AndroidNaught中它在相机中崩溃.我使用fileprovider但不起作用.MainActivity.javapublicclassMainActivityextendsAppCompatActivityimplementsView.OnClickListener{privateButtonmBtn;privateContextcont

从图库和相机中选择裁剪图像在Android 7.0以下完成,但在AndroID Naught中它在相机中崩溃.我使用fileprovIDer但不起作用.

MainActivity.java

public class MainActivity extends AppCompatActivity implements VIEw.OnClickListener {private button mBtn;private Context context;private static final int SELECT_PICTURE_CAMara = 101, SELECT_PICTURE = 201, CROP_IMAGE = 301;private Uri outputfileUri;String mCurrentPhotopath;private Uri selectedImageUri;private file finalfile = null;private ImageVIEw imageVIEw;private PermissionUtil permissionUtil;Uri fileUri;file file = null;@OverrIDeprotected voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.activity_main);    mBtn = (button) findVIEwByID(R.ID.btn_img);    imageVIEw = (ImageVIEw) findVIEwByID(R.ID.img_photo);    permissionUtil = new PermissionUtil();    mBtn.setonClickListener(this);    context = this;}@OverrIDepublic voID onClick(VIEw vIEw) {    selectimageOption();}private voID selectimageOption() {    final CharSequence[] items = {"Capture Photo", "Choose from gallery", "Cancel"};    AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);    builder.setTitle("Add Photo!");    builder.setItems(items, new DialogInterface.OnClickListener() {        @OverrIDe        public voID onClick(DialogInterface dialog, int item) {            if (items[item].equals("Capture Photo")) {                if (permissionUtil.checkMarshMellowPermission()) {                    if (permissionUtil.verifyPermissions(MainActivity.this, permissionUtil.getCameraPermissions()))                        onClickCamera();                    else                        ActivityCompat.requestPermissions(MainActivity.this, permissionUtil.getCameraPermissions(), SELECT_PICTURE_CAMara);                } else                    onClickCamera();            } else if (items[item].equals("Choose from gallery")) {                if (permissionUtil.checkMarshMellowPermission()) {                    if (permissionUtil.verifyPermissions(MainActivity.this, permissionUtil.getgalleryPermissions()))                        onClickgallery();                    else                        ActivityCompat.requestPermissions(MainActivity.this, permissionUtil.getgalleryPermissions(), SELECT_PICTURE);                } else                    onClickgallery();            } else if (items[item].equals("Cancel")) {                dialog.dismiss();            }        }    });    builder.show();}public voID onActivityResult(int requestCode, int resultCode, Intent data) {    super.onActivityResult(requestCode, resultCode, data);    if (resultCode == RESulT_OK) {        if (requestCode == SELECT_PICTURE) {            selectedImageUri = data.getData();            cropImage(selectedImageUri);        } else if (requestCode == CROP_IMAGE) {            Uri imageUri = Uri.parse(mCurrentPhotopath);            file file = new file(imageUri.getPath());            try {                inputStream ims = new fileinputStream(file);                imageVIEw.setimageBitmap(BitmapFactory.decodeStream(ims));            } catch (fileNotFoundException e) {                return;            }        } else if (requestCode == SELECT_PICTURE_CAMara && resultCode == Activity.RESulT_OK) {            cropImage1();        }    }}private voID onClickCamera() {    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);    if (takePictureIntent.resolveActivity(context.getPackageManager()) != null) {       /* file photofile = null;        try {            photofile = createImagefile();        } catch (IOException ex) {        }        if (photofile != null) {            Uri photoURI;            if (Build.VERSION.SDK_INT >= 24) {                photoURI = fileProvIDer.getUriForfile(MainActivity.this,                        BuildConfig.APPliCATION_ID + ".fileprovIDer", photofile);            } else {                photoURI = Uri.fromfile(photofile);            }            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);            startActivityForResult(takePictureIntent, SELECT_PICTURE_CAMara);        }*/        ContentValues values = new ContentValues(1);        values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpg");        fileUri = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);        takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);        takePictureIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);        startActivityForResult(takePictureIntent, SELECT_PICTURE_CAMara);    } else {        Toast.makeText(this, getString(R.string.error_no_camera), Toast.LENGTH_LONG).show();    }}private voID onClickgallery() {    List<Intent> targets = new ArrayList<>();    Intent intent = new Intent();    intent.setType("image/*");    intent.setAction(Intent.ACTION_PICK);    intent.putExtra(Intent.EXTRA_LOCAL_ONLY, true);    List<ResolveInfo> candIDates = getApplicationContext().getPackageManager().queryIntentActivitIEs(intent, 0);    for (ResolveInfo candIDate : candIDates) {        String packagename = candIDate.activityInfo.packagename;        if (!packagename.equals("com.Google.androID.apps.photos") && !packagename.equals("com.Google.androID.apps.plus") && !packagename.equals("com.androID.documentsui")) {            Intent iWantThis = new Intent();            iWantThis.setType("image/*");            iWantThis.setAction(Intent.ACTION_PICK);            iWantThis.putExtra(Intent.EXTRA_LOCAL_ONLY, true);            iWantThis.setPackage(packagename);            targets.add(iWantThis);        }    }    if (targets.size() > 0) {        Intent chooser = Intent.createChooser(targets.remove(0), "Select Picture");        chooser.putExtra(Intent.EXTRA_INITIAL_INTENTS, targets.toArray(new Parcelable[targets.size()]));        startActivityForResult(chooser, SELECT_PICTURE);    } else {        Intent intent1 = new Intent(Intent.ACTION_PICK);        intent1.setType("image/*");        startActivityForResult(Intent.createChooser(intent1, "Select Picture"), SELECT_PICTURE);    }}private file createImagefile() throws IOException {    // Create an image file name    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());    String imagefilename = "JPEG_" + timeStamp + "_";    file storageDir = context.getExternalfilesDir(Environment.DIRECTORY_PICTURES);    file image = file.createTempfile(            imagefilename,  /* prefix */            ".jpg",         /* suffix */            storageDir      /* directory */    );    // Save a file: path for use with ACTION_VIEW intents    if (Build.VERSION.SDK_INT >= 24) {        mCurrentPhotopath = String.valueOf(fileProvIDer.getUriForfile(MainActivity.this,                BuildConfig.APPliCATION_ID + ".provIDer", image));    } else {        mCurrentPhotopath = String.valueOf(Uri.fromfile(image));    }    return image;}/*private Uri createImageUri(){    ContentResolver contentResolver=getContentResolver();    ContentValues cv=new ContentValues();    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());    cv.put(MediaStore.Images.Media.Title,timeStamp);    return contentResolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,cv);}*/private voID cropImage(Uri selectedImageUri) {    Intent cropIntent = new Intent("com.androID.camera.action.CROP");    cropIntent.setDataAndType(selectedImageUri, "image/*");    cropIntent.putExtra("crop", "true");    cropIntent.putExtra("aspectX", 1);    cropIntent.putExtra("aspectY", 1.5);    cropIntent.putExtra("return-data", true);    outputfileUri = Uri.fromfile(createCropfile());    cropIntent.putExtra(MediaStore.EXTRA_OUTPUT, outputfileUri);    startActivityForResult(cropIntent, CROP_IMAGE);}private voID cropImage1() {    Intent cropIntent = new Intent("com.androID.camera.action.CROP");    cropIntent.setDataAndType(fileUri, "image/*");    cropIntent.putExtra("crop", "true");    cropIntent.putExtra("aspectX", 1);    cropIntent.putExtra("aspectY", 1.5);    cropIntent.putExtra("return-data", true);    if (Build.VERSION.SDK_INT >= 24) {        outputfileUri = fileProvIDer.getUriForfile(MainActivity.this,                BuildConfig.APPliCATION_ID + ".provIDer", createCropfile());    } else        outputfileUri = Uri.fromfile(createCropfile());    cropIntent.putExtra(MediaStore.EXTRA_OUTPUT, outputfileUri);    startActivityForResult(cropIntent, CROP_IMAGE);   /* ContentValues values = new ContentValues(1);    values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpg");    outputfileUri = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);    cropIntent.putExtra(MediaStore.EXTRA_OUTPUT, outputfileUri);    cropIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);    cropIntent.putExtra(MediaStore.EXTRA_OUTPUT, outputfileUri);    startActivityForResult(cropIntent, CROP_IMAGE);*/}private file createCropfile() {    file storageDir = context.getExternalfilesDir(Environment.DIRECTORY_PICTURES);    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());    //  path = path + (timeStamp + "1jpg");    try {        file = file.createTempfile(timeStamp, ".jpg", storageDir);    } catch (IOException e) {        e.printstacktrace();    }    /*if (Build.VERSION.SDK_INT >= 24)        mCurrentPhotopath = String.valueOf(fileProvIDer.getUriForfile(MainActivity.this,                BuildConfig.APPliCATION_ID + ".provIDer", file));    else*/    mCurrentPhotopath = String.valueOf(Uri.fromfile(file));    return file;}}

这项工作在所有设备中但不在> = androID 7.0 Naught设备中

解决方法:

我只是在nexus6p androID N上解决了这个问题,你需要授予uri权限,这样系统摄像头才能暂时访问文件等待裁剪,因为StrictMode AndroID N不支持传递文件：Uri在一个Intent extra中再看看Scheme Ban in N Developer Preview,我们使用fileProvIDer代替.这是我的源代码：

AndroIDManifest.xml中

<provIDer    androID:name="androID.support.v4.content.fileProvIDer"        androID:authoritIEs="dreamgo.corp.provIDer"        androID:grantUriPermissions="true"        androID:exported="false">        <Meta-data            androID:name="androID.support.file_PROVIDER_PATHS"            androID:resource="@xml/filepaths"/></provIDer>

filepaths.xml

<?xml version="1.0" enCoding="utf-8"?><paths xmlns:androID="http://schemas.androID.com/apk/res/androID">    <external-path name="images" path="."/></paths>

MainActivity.java

Uri photoURI = fileProvIDer.getUriForfile(context, "dreamgo.corp.provIDer", file);//grant uri with essential permission the first arg is the The packagename you would like to allow to access the Uri.context.grantUriPermission("com.androID.camera",photoURI,                    Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION);Intent intent = new Intent("com.androID.camera.action.CROP");intent.setDataAndType(photoURI, "image/*");//you must setup two line belowintent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);intent.putExtra("crop", "true");intent.putExtra("aspectX", 1);intent.putExtra("aspectY", 1);intent.putExtra("outputX", 200);intent.putExtra("outputY", 200);intent.putExtra("return-data", true);//you must setup thisintent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);startActivityForResult(intent, 1);

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