推荐一个很好用的运行时权限封装库

JsPermission

对安卓6.0及以上系统，运行时权限动态申请的封装库
github地址：https://github.com/shuaijia/JsPermission

用法

step 1：添加依赖

allprojects {
    repositories {
        ...
        maven { url 'https://jitpack.io' }
    }
}
dependencies {
        compile 'com.github.shuaijia:JsPermission:v1.0'
}

step 2:在AndroidManiFest.xml中配置权限（为的是适配6.0以下系统）如：

step 3：在Activity或者Fragment中

if (JsPermissionUtils.needRequestPermission()) {
    JsPermission.with(this)
          .requestCode(20)
          .permission(Manifest.permission.CAMERA,
                      Manifest.permission.WRITE_EXTERNAL_STORAGE) // 不定长参数
          .callBack(this)
          .send();
}
或
if (JsPermissionUtils.needRequestPermission()) {
    JsPermission.with(this)
             .requestCode(30)
             .permission(Manifest.permission.BODY_SENSORS)
             .callBack(this)
             .send();
}

step 4:callBack()方法中传入JsPermissionListener回调

@Override
public void onPermit(int requestCode, String... permission) {
     Log.e(TAG, "onPermit: " + requestCode + " " + permission.toString());
}

@Override
public void onCancel(int requestCode, String... permission) {
     Log.e(TAG, "onCancel: " + requestCode + " " + permission.toString());
}

step 5:在Activity中加入

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

step 6:好了，可以随心所欲了！