Android6.0运行时权限以及RxPermissions的使用

普通方式请求

以拨打电话为例

@OnClick(R.id.btnCommon)
public void CommonCall() {
    if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CALL_PHONE) !=
            PackageManager.PERMISSION_GRANTED){
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CALL_PHONE}, 0);
    }else {
        startActivity(new Intent(Intent.ACTION_CALL).setData(Uri.parse("tel:" + 10000)));
    }
}

 @Override
public void onRequestPermissionsResult(int requestCode, 
        @NonNull String[] permissions,@NonNull int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    if (requestCode == 0) {
        if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            startActivity(new Intent(Intent.ACTION_CALL).setData(Uri.parse("tel:" + 10000)));
        }
    }
}

RxPermissions方式请求

RxPermissions github 传送门：RxPermissions

     //RxJava的依赖包
    compile 'io.reactivex.rxjava2:rxjava:'+rxjava_version
    //RxAndroid的依赖包
    compile 'io.reactivex.rxjava2:rxandroid:'+rxjava_version
    //RxPermissions
    compile 'com.tbruyelle.rxpermissions2:rxpermissions:0.9.4@aar'

• 首先需要做初始化工作

RxPermissions rxPermissions = new RxPermissions(this);

@OnClick(R.id.btnRxPermission)
public void RxPermissionCall() {
    rxPermissions.request(Manifest.permission.CALL_PHONE).subscribe(new Consumer() {
        @Override
        public void accept(Boolean granted) throws Exception {
            if (granted) {
                startActivity(new Intent(Intent.ACTION_CALL).setData(Uri.parse("tel:" + 10000)));
            }
        }
    });
}

如果使用了java8 这段代码将会是这样 非常简洁

@OnClick(R.id.btnRxPermission)
public void RxPermissionCall() {
    rxPermissions.request(Manifest.permission.CALL_PHONE).subscribe(granted -> {
        if (granted) {
            startActivity(new Intent(Intent.ACTION_CALL).setData(Uri.parse("tel:" + 10000)));
        }
    });
}

RxPermissions 请求多个权限

rxPermissions
    .requestEach(Manifest.permission.CAMERA,
             Manifest.permission.READ_PHONE_STATE)
    .subscribe(permission -> { // will emit 2 Permission objects
        if (permission.granted) {
           // `permission.name` is granted !
        } else if (permission.shouldShowRequestPermissionRationale)
           // Denied permission without ask never again
        } else {
           // Denied permission with ask never again
           // Need to go to the settings
        }
    });

普通方法Fragment中运行时权限的特殊处理

• 在Fragment中申请权限，不要使用ActivityCompat.requestPermissions, 直接使用Fragment的requestPermissions方法，否则会回调到Activity的 onRequestPermissionsResult

• 如果在Fragment中嵌套Fragment，在子Fragment中使用requestPermissions方法，onRequestPermissionsResult不会回调回来，建议使用 getParentFragment().requestPermissions方法，
  这个方法会回调到父Fragment中的onRequestPermissionsResult，加入以下代码可以把回调透传到子Fragment

@Override
public void onRequestPermissionsResult(int requestCode, String[] permissions, 
        int[] grantResults) {
  super.onRequestPermissionsResult(requestCode, permissions, grantResults);
  List fragments = getChildFragmentManager().getFragments();
  if (fragments != null) {
      for (Fragment fragment : fragments) {
          if (fragment != null) {
              fragment.onRequestPermissionsResult(requestCode,permissions,grantResults);
          }
      }
  }
}