安卓请求权限

1.首先确定你要申请的权限

可以定义成一个数组：如

protected String[] needPermissions = {
            Manifest.permission.WRITE_EXTERNAL_STORAGE,//存储卡写入权限
            Manifest.permission.READ_EXTERNAL_STORAGE,//存储卡读取权限
            Manifest.permission.READ_PHONE_STATE,//读取手机状态权限
    };

上诉权限是一个常量字符串，需要引入 import android.Manifest;

2.检测权限有没有获取到，找出没获取到的去申请

private List checkGamePer(){
        List arr = new ArrayList();
        for (String perm : needPermissions) {

                //this参数要activity
            if (ContextCompat.checkSelfPermission(this, perm) != PackageManager.PERMISSION_GRANTED ) {
                arr.add(perm);
            }
        }
        return arr;
    }

 List arr = checkGamePer();
        if (arr.size()>0) {
            // 还有权限没申请到，则申请权限,  this参数要activity
            ActivityCompat.requestPermissions(this, arr.toArray(new String[arr.size()]), 1);
        } else {
           //权限都申请到了，直接做你想做的事
        }

3.玩家点击同意或者拒绝权限后会回调，在上诉this的activity中注册回调函数

public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        if (requestCode == 1) {
            Boolean flag = true;
            for (int i = 0; i < permissions.length; i++) {
                if (grantResults[i] != PackageManager.PERMISSION_GRANTED) {//选择了“始终允许”
                    flag = false;
                }
            }
            if (flag) {
                //申请成功
                
            } else {
                //失败  退出游戏
                finish();
            }
        }
    }

这里的requestCode就是请求权限时，传入的参数 

写法2

//请求权限
protected List mNeedRequestPMSList = new ArrayList<>();
 
void checkAndRequestPermissions(int requestCode) {
        
        if(Build.VERSION.SDK_INT >= 23 &&
                PackageManager.PERMISSION_GRANTED != ActivityCompat.checkSelfPermission(MainActivity.activity,Manifest.permission.READ_PHONE_STATE)){
            mNeedRequestPMSList.add(Manifest.permission.READ_PHONE_STATE);
        }
        checkAndRequestPermissionsEnd(Constants.REQUEST_PERMISSIONS_CODE_ViVo);
    }
/**检测权限结束 */
    private void checkAndRequestPermissionsEnd(int requestCode){
        if (0 == mNeedRequestPMSList.size()) {
            /**
             * 权限都已经有了
             */
            permissionInit();
        } else {
            /**
             * 有权限需要申请，主动申请。
             */
            String[] temp = new String[mNeedRequestPMSList.size()];
            mNeedRequestPMSList.toArray(temp);
            ActivityCompat.requestPermissions(MainActivity.activity, temp, requestCode);
        }
    }
public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        //是否用户都点了允许
        Boolean flag = true;
        for (int i = 0; i < permissions.length; i++) {
            if (grantResults[i] != PackageManager.PERMISSION_GRANTED) {//选择了“始终允许”
                flag = false;
            }
        }
        switch (requestCode) {
            case Constants.REQUEST_PERMISSIONS_CODE_OPPO:
                if (flag) {
                    ChannelMain.getInstance().agreePermission();
                } else {
                    /**
                     * 如果用户没有授权，那么应该说明意图，引导用户去设置里面授权。
                     */
                    Toast.makeText(this, "应用缺少SDK运行必须的READ_PHONE_STATE权限！请点击\"应用权限\"，打开所需要的权限。", Toast.LENGTH_LONG).show();
                    Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
                    intent.setData(Uri.parse("package:" + getPackageName()));
                    startActivity(intent);
                    finish();
                }
                break;
            default:
                break;
        }
    }