安卓6.0权限申请

1.使用v4库提供的ContextCompat进行权限申请

//检测单个权限是否已经设置
        if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA)
                == PackageManager.PERMISSION_GRANTED) {
            cameraView.start();
        }
        //如果应用之前请求过此权限但用户拒绝了请求，此方法将返回 true。如果用户在过去拒绝了权限请求，并在权限请求系统对话框中选择了 Don’t ask again 选项，此方法将返回 false。
        else if (ActivityCompat.shouldShowRequestPermissionRationale(this,
                Manifest.permission.CAMERA)) {
            ConfirmationDialogFragment
                    .newInstance(R.string.camera_permission_confirmation,
                            new String[]{Manifest.permission.CAMERA},
                            REQUEST_CAMERA_PERMISSION,
                            R.string.camera_permission_not_granted)
                    .show(getSupportFragmentManager(), FRAGMENT_DIALOG);
        }
        //否则进行权限申请
        else {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA},
                    REQUEST_CAMERA_PERMISSION);
        }

onRequestPermissionsResult()
当应用请求权限时，系统将向用户显示一个对话框。当用户响应时，系统将调用应用的 onRequestPermissionsResult() 方法，向其传递用户响应，处理对应的场景。

  @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
                                           @NonNull int[] grantResults) {
        switch (requestCode) {
            case REQUEST_CAMERA_PERMISSION:
                if (permissions.length != 1 || grantResults.length != 1) {
                    throw new RuntimeException("Error on requesting camera permission.");
                }
                if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {

                    toast("权限申请成功");
                }
                else{
                    toast("权限申请失败");
                }
                // No need to start camera here; it is handled by onResume
                break;
        }
    }

使用安卓原生方式进行权限申请

使用第三方库进行权限申请：
申请内存卡读写权限

PermissionsUtil.requestPermission(getApplication(), new PermissionListener() {
            @Override
            public void permissionGranted(@NonNull String[] permissions) {

            }

            @Override
            public void permissionDenied(@NonNull String[] permissions) {

            }
        }, android.Manifest.permission.READ_EXTERNAL_STORAGE, android.Manifest.permission.WRITE_EXTERNAL_STORAGE);

跳转到设置权限界面

 Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
        Uri uri = Uri.fromParts("package", BuildConfig.mainApplicationId, null);
        intent.setData(uri);
        try {
            context.startActivity(intent);
        } catch (Exception e) {
            e.printStackTrace();
        }