android中关于动态申请权限的代码（可以直接用）

需要在Manifest.xml文件中添加

<!-- To auto-complete the email text field in the login form with the user's emails -->
    <uses-permission android:name="android.permission.GET_ACCOUNTS" />
    <uses-permission android:name="android.permission.READ_PROFILE" />
    <uses-permission android:name="android.permission.READ_CONTACTS" />
    <!-- 用户权限设置 -->
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

然后一般是在MainActivity中动态申请权限

//权限数组（申请定位）
    private String[] permissions = new String[]{Manifest.permission.CAMERA,Manifest.permission.READ_EXTERNAL_STORAGE,Manifest.permission.WRITE_EXTERNAL_STORAGE};

    //返回code
    private static final int OPEN_SET_REQUEST_CODE = 100;
    //调用此方法判断是否拥有权限
    private void initPermissions(){
            if (lacksPermission()){//判断是否拥有权限
                //请求权限，第二参数权限String数据，第三个参数是请求码便于在onRequestPermissionsResult 方法中根据code进行判断
                ActivityCompat.requestPermissions(this, permissions,OPEN_SET_REQUEST_CODE);
            } else {
                //拥有权限执行操作
            }
    }

    //如果返回true表示缺少权限
    public boolean lacksPermission() {
        for (String permission : permissions) {
            //判断是否缺少权限，true=缺少权限
            if(ContextCompat.checkSelfPermission(this, permission) != PackageManager.PERMISSION_GRANTED){
                return true;
            }
        }
        return false;
    }

@Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);

        switch (requestCode){//响应Code
            case OPEN_SET_REQUEST_CODE:
                if (grantResults.length > 0) {
                    for(int i = 0; i < grantResults.length; i++){
                        if(grantResults[i] != PackageManager.PERMISSION_GRANTED){
                            Toast.makeText(this,"未拥有相应权限",Toast.LENGTH_LONG).show();
                            return;
                        }
                    }
                    //拥有权限执行操作
                } else {
                    Toast.makeText(this,"未拥有相应权限",Toast.LENGTH_LONG).show();
                }
                break;
        }
    }