Android 权限请求模板（方便CV）

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public class MainActivity extends AppCompatActivity {


    private static final int PERMISSIONS_CODE = 0x001;
    private static final String[] NEEDED_PERMISSIONS = new String[]{
            Manifest.permission.READ_PHONE_STATE,
            Manifest.permission.CAMERA,
            Manifest.permission.WRITE_EXTERNAL_STORAGE
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        if (!checkPermissions(NEEDED_PERMISSIONS)) {
            ActivityCompat.requestPermissions(this, NEEDED_PERMISSIONS, PERMISSIONS_CODE);
            return;
        } else {
            toNext();
        }
    }

    private void toNext() {

    }

    private boolean checkPermissions(String[] neededPermissions) {
        if (neededPermissions == null || neededPermissions.length == 0) {
            return true;
        }
        boolean allGranted = true;
        for (String neededPermission : neededPermissions) {
            allGranted &= ContextCompat.checkSelfPermission(this, neededPermission) == PackageManager.PERMISSION_GRANTED;
        }
        return allGranted;
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == PERMISSIONS_CODE) {
            boolean isAllGranted = true;
            for (int grantResult : grantResults) {
                isAllGranted &= (grantResult == PackageManager.PERMISSION_GRANTED);
            }
            if (isAllGranted) {
                toNext();
            } else {
                Toast.makeText(this, "权限被拒！", Toast.LENGTH_SHORT).show();
            }
        }
    }

}