Android小技巧——判断系统是否有开启权限

亦凉 2022-05-25 03:37 364阅读 0赞

public void requestPowerCamera(){
        if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA)
                != PERMISSION_GRANTED) {
            //申请权限，字符串数组内是一个或多个要申请的权限，1是申请权限结果的返回参数，在onRequestPermissionsResult可以得知申请结果
            ActivityCompat.requestPermissions(this,
                    new String[]{
                            Manifest.permission.CAMERA
                    }, 2);
        }
    }

@Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        switch (requestCode){
            case 1:
                for (int i = 0; i < permissions.length; i++) {
                    if (grantResults[i] == PERMISSION_GRANTED) {
                        Toast.makeText(this, "" + "权限" + permissions[i] + "申请成功",
                                Toast.LENGTH_SHORT).show();
                    } else {
                        Toast.makeText(this, "" + "权限" + permissions[i] + "申请失败",
                                Toast.LENGTH_SHORT).show();
                    }
                }
                requestPowerLocation();
                break;
            case 2:
                for (int i = 0; i < permissions.length; i++) {
                    if (grantResults[i] == PERMISSION_GRANTED) {
                        Toast.makeText(this, "" + "权限" + permissions[i] + "申请成功",
                                Toast.LENGTH_SHORT).show();
                    } else {
                        Toast.makeText(this, "" + "权限" + permissions[i] + "申请失败",
                                Toast.LENGTH_SHORT).show();
                    }
                }
                enterList();
                break;
            case 3:
                for (int i = 0; i < permissions.length; i++) {
                    if (grantResults[i] == PERMISSION_GRANTED) {
                        Toast.makeText(this, "" + "权限" + permissions[i] + "申请成功",
                                Toast.LENGTH_SHORT).show();
                    } else {
                        Toast.makeText(this, "" + "权限" + permissions[i] + "申请失败",
                                Toast.LENGTH_SHORT).show();
                    }
                }
                requestPowerCamera();
                break;
        }
    }