compile 'com.tbruyelle.rxpermissions2:rxpermissions:0.9.4@aar'   compile 'io.reactivex.rxjava2:rxjava:2.0.5'

 <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>  <uses-permission android:name="android.permission.CAMERA"/>

 Button button = (Button) findViewById(R.id.button);    button.setOnClickListener(new View.OnClickListener() {        @Override        public void onClick(View view) {          RxPermissions rxPermissions = new RxPermissions((Activity) mContext);          rxPermissions.request(Manifest.permission.ACCESS_FINE_LOCATION,                  Manifest.permission.CAMERA)                  .subscribe(new Observer<Boolean>() {                @Override                public void onSubscribe(Disposable d) {                }                @Override                public void onNext(Boolean aBoolean) {                  if (aBoolean) {                    Toast.makeText(mContext, "已獲取權限，可以干想干的咯", Toast.LENGTH_LONG)                        .show();                  } else {                    //只有用戶拒絕開啟權限，且選了不再提示時，才會走這里，否則會一直請求開啟                    Toast.makeText(mContext, "主人，我被禁止啦，去設置權限設置那把我打開喲", Toast.LENGTH_LONG)                        .show();                  }                }                @Override                public void onError(Throwable e) {                }                @Override                public void onComplete() {                }        });      }    });