Android调用相机相册并显示照片在ImageView

    public static final int TAKE_PHOTO = 1;
    public static final int CHOOSE_PHOTO = 2;
    public static final int CROP_REQUEST_CODE = 5;

    /**
     * 文件相关
     */
    private File outputImage;
    private Uri imageUri;

    private File cropImageFile;
    private Uri cropImageUri;


    /**
     * 照片选择弹框
     */
    private void showSelectorPhotoDialog() {
        final RxPermissions rxPermissions = new RxPermissions(this);

        final SelectorPhotosDialog photosDialog = new SelectorPhotosDialog(MyInfoActivity.this);
        photosDialog.show();
        //选择相机
        photosDialog.OnClickCamera(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //请求相机权限
                rxPermissions.request(Manifest.permission.CAMERA).subscribe(new Consumer<Boolean>() {
                    @Override
                    public void accept(Boolean aBoolean) throws Exception {
                        if (aBoolean){
                            openCarema();
                        }else {
                            toSystemSetting();
                        }
                    }
                });
                photosDialog.dismiss();
            }
        });
        //选择相册
        photosDialog.OnClickPhotos(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                //请求相册权限
                rxPermissions.request(Manifest.permission.READ_EXTERNAL_STORAGE,Manifest.permission.WRITE_EXTERNAL_STORAGE).subscribe(new Consumer<Boolean>() {
                    @Override
                    public void accept(Boolean aBoolean) throws Exception {
                        if (aBoolean){
                            openAlbum();
                        }else {
                            toSystemSetting();
                        }
                    }
                });
                photosDialog.dismiss();
            }
        });

    }
    /**
     * 当拒绝了授权后，为提升用户体验，可以以弹窗的方式引导用户到设置中去进行设置
     */
    public void toSystemSetting() {
        SystemSettingDialog settingDialog = new SystemSettingDialog();
        settingDialog.showDialog(MyInfoActivity.this);
    }

    /**
     * 打开相机
     */
    private void openCarema() {
        //创建File对象，用于存储拍照后的照片
        outputImage = new File(getExternalCacheDir(), "head.jpg");
        if (outputImage.exists()) {
            outputImage.delete();
        }
        try {
            outputImage.createNewFile();
        } catch (IOException e) {
            e.printStackTrace();
        }

        if (Build.VERSION.SDK_INT >= 24) {
            imageUri = FileProvider.getUriForFile(MyInfoActivity.this, getPackageName()+".fileProvider", outputImage);
        } else {
            imageUri = Uri.fromFile(outputImage);
        }
        //启动相机程序
        Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
        intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
        startActivityForResult(intent, TAKE_PHOTO);
    }

    /**
     * 打开相册
     */
    private void openAlbum() {
        Intent intent =  new Intent(Intent.ACTION_PICK);
        intent.setType("image/*");
        startActivityForResult(intent, CHOOSE_PHOTO);
    }
    /**
     * 裁剪图片
     */
    private void cropPhoto(Uri uri) {

        cropImageFile = new File(getExternalCacheDir(), "crop_head.jpg");

        try {
            if (cropImageFile.exists()){
                cropImageFile.delete();
             }
            cropImageFile.createNewFile();
        } catch (IOException e) {
            e.printStackTrace();
        }
        cropImageUri = Uri.fromFile(cropImageFile);

        Intent intent = new Intent("com.android.camera.action.CROP");
        intent.setDataAndType(uri, "image/*");
        intent.putExtra("crop", "true");
        intent.putExtra("aspectX", 1);
        intent.putExtra("aspectY", 1);
        intent.putExtra("outputX", 300);
        intent.putExtra("outputY", 300);
        intent.putExtra("return-data", false);//注意这里返回false,因为在部分手机上获取不到返回的数据
        intent.putExtra(MediaStore.EXTRA_OUTPUT,cropImageUri);
        intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
        intent.putExtra("noFaceDetection", true);
        intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
        intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
        startActivityForResult(intent, CROP_REQUEST_CODE);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode==RESULT_OK){
            switch (requestCode) {
                case TAKE_PHOTO:
                    cropPhoto(imageUri);
                    break;
                case CHOOSE_PHOTO:
                    cropPhoto(data.getData());
                    break;
                case CROP_REQUEST_CODE:
                    Bitmap headImage = null;
                    try {
                        headImage = BitmapFactory.decodeStream(getContentResolver().openInputStream(cropImageUri));
                    } catch (FileNotFoundException e) {
                        e.printStackTrace();
                    }
                   infoitem1.setAvater(headImage);
                    break;
          
                default:
                    break;
            }
        }


    }

 进入系统权限设置弹框

public class SystemSettingDialog {

    public void showDialog(final Context context){
        //当拒绝了授权后，为提升用户体验，可以以弹窗的方式引导用户到设置中去进行设置
        new AlertDialog.Builder(context)
                .setMessage("需要开启权限才能使用此功能")
                .setPositiveButton("设置", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        //引导用户到设置中去进行设置
                        Intent intent = new Intent();
                        intent.setAction("android.settings.APPLICATION_DETAILS_SETTINGS");
                        intent.setData(Uri.fromParts("package", context.getPackageName(), null));
                        context.startActivity(intent);
                    }
                })
                .setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        //finish();
                    }
                })
                .create()
                .show();
    }
}