Android 6.0权限错误

是，Android M的权限已更改。现在需要在运行时请求权限，而不是Android M之前的安装时间。

您可以在这里查看文档

此版本引入了新的权限模型，用户现在可以在运行时直接管理应用程序权限。该模型为用户提供了更好的可见性和对权限的控制，同时为应用程序开发人员简化了安装和自动更新过程。用户可以分别授予或撤消已安装应用程序的权限。

在面向Android 6.0（API级别23）或更高版本的应用上，请确保在运行时检查并请求权限。要确定您的应用是否已被授予权限，请调用新的checkSelfPermission（）方法。要请求权限，请调用新的requestPermissions（）方法。即使您的应用程序未定位到Android 6.0（API级别23），也应在新的权限模型下测试您的应用程序。

有关在应用程序中支持新权限模型的详细信息，请参阅使用系统权限。有关如何评估对应用程序影响的提示，请参阅权限最佳做法。

要检查权限，您必须像这样检查，取自github

public class MainActivity extends SampleActivityBase
        implements ActivityCompat.OnRequestPermissionsResultCallback {

    public static final String TAG = "MainActivity";

    /**
     * Id to identify a camera permission request.
     */
    private static final int REQUEST_CAMERA = 0;

    // Whether the Log Fragment is currently shown.
    private boolean mLogShown;

    private View mLayout;

    /**
     * Called when the 'show camera' button is clicked.
     * Callback is defined in resource layout definition.
     */
    public void showCamera(View view) {
        // Check if the Camera permission is already available.
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA)
                != PackageManager.PERMISSION_GRANTED) {
            // Camera permission has not been granted.

            requestCameraPermission();

        } else {

            // Camera permissions is already available, show the camera preview.
            showCameraPreview();
        }
    }

    /**
     * Requests the Camera permission.
     * If the permission has been denied previously, a SnackBar will prompt the user to grant the
     * permission, otherwise it is requested directly.
     */
    private void requestCameraPermission() {
        if (ActivityCompat.shouldShowRequestPermissionRationale(this,
                Manifest.permission.CAMERA)) {
            // Provide an additional rationale to the user if the permission was not granted
            // and the user would benefit from additional context for the use of the permission.
            // For example if the user has previously denied the permission.
            Snackbar.make(mLayout, R.string.permission_camera_rationale,
                    Snackbar.LENGTH_INDEFINITE)
                    .setAction(R.string.ok, new View.OnClickListener() {
                        @Override
                        public void onClick(View view) {
                            ActivityCompat.requestPermissions(MainActivity.this,
                                    new String[]{Manifest.permission.CAMERA},
                                    REQUEST_CAMERA);
                        }
                    })
                    .show();
        } else {

            // Camera permission has not been granted yet. Request it directly.
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA},
                    REQUEST_CAMERA);
        }
    }

    /**
     * Display the {@link CameraPreviewFragment} in the content area if the required Camera
     * permission has been granted.
     */
    private void showCameraPreview() {
        getSupportFragmentManager().beginTransaction()
                .replace(R.id.sample_content_fragment, CameraPreviewFragment.newInstance())
                .addToBackStack("contacts")
                .commit();
    }

    /**
     * Callback received when a permissions request has been completed.
     */
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
            @NonNull int[] grantResults) {

        if (requestCode == REQUEST_CAMERA) {

            // Received permission result for camera permission.est.");
            // Check if the only required permission has been granted
            if (grantResults.length == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                // Camera permission has been granted, preview can be displayed
                Snackbar.make(mLayout, R.string.permision_available_camera,
                        Snackbar.LENGTH_SHORT).show();
            } else {
                Snackbar.make(mLayout, R.string.permissions_not_granted,
                        Snackbar.LENGTH_SHORT).show();

            }
        }
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mLayout = findViewById(R.id.sample_main_layout);

        if (savedInstanceState == null) {
            FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
            RuntimePermissionsFragment fragment = new RuntimePermissionsFragment();
            transaction.replace(R.id.sample_content_fragment, fragment);
            transaction.commit();
        }
    }
}