一、多权限申请

①在oncreat(）方法中写此方法

/**
 * 6.0之后的动态申请权限
 */
checkRequiredPermission(LoginActivity.this);

②

/**
 * 检查权限
 * @param activity
 */
private void checkRequiredPermission(final Activity activity) {
    for (String permission : permissionsArray) {
        if (ContextCompat.checkSelfPermission(activity, permission) != PackageManager.PERMISSION_GRANTED) {
            permissionsList.add(permission);
        }
    }
    if (permissionsList.size()!=0){
        ActivityCompat.requestPermissions(activity, permissionsList.toArray(new String[permissionsList.size()]), REQUEST_CODE_ASK_PERMISSIONS);
    }

}

③实现回调

//动态申请权限的返回值
@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
    switch (requestCode) {
        case REQUEST_CODE_ASK_PERMISSIONS:
            for (int i = 0; i < permissions.length; i++) {
                if (grantResults[i] == PackageManager.PERMISSION_GRANTED) {
                    Toast.makeText(LoginActivity.this, "权限开启" + permissions[i], Toast.LENGTH_SHORT).show();
                } else {
                    Toast.makeText(LoginActivity.this, "权限禁止" + permissions[i], Toast.LENGTH_SHORT).show();
                }
            }
            break;
        default:
            super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    }
}

二、单权限申请（也可以直接用多权限申请的方法，在里面只写一个权限）：

①

第一步判断时候授权。

if (Build.VERSION.SDK_INT >= 23) { int checkCallPhonePermission = ContextCompat.checkSelfPermission(FoodActivity.this, Manifest.permission.CAMERA);
                        if(checkCallPhonePermission != PackageManager.PERMISSION_GRANTED){
                            ActivityCompat.requestPermissions(FoodActivity.this,new String[]{Manifest.permission.CAMERA},222);
                            return;
                        }else{

                            openCamra();//调用具体方法
                        }
                    } else {

                        openCamra();//调用具体方法

}

②写回调

@Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        switch (requestCode) {
        //就像onActivityResult一样这个地方就是判断你是从哪来的。
            case 222:
                if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    // Permission Granted
                    openCamra();
                } else {
                    // Permission Denied
                    Toast.makeText(FoodActivity.this, "很遗憾你把相机权限禁用了。请务必开启相机权限享受我们提供的服务吧。", Toast.LENGTH_SHORT)
                            .show();
                }
                break;
            default:
                super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        }
    }