Android 7.0版本升级解析包错误

private void downLoadNewVersion() {
    OkHttpUtils.get()
            .url(url)
            .headers(PackOkHttpUtils.getHeadsMap(this))
            .tag(MainActivity.class)
            .addParams("version", CommonParamsUtil.getVersion(getApplicationContext()))
            .build()
            .execute(new FileCallBack(Environment.getExternalStoragePublicDirectory
                    (Environment.DIRECTORY_DOWNLOADS).getAbsolutePath(), "ypw.apk") {
                @Override
                public void inProgress(float progress, long total, int id) {
                    super.inProgress(progress, total, id);
                    int progressInt = (int) (progress * 100);
                    progressDialog.setProgress(progressInt);
                }
                @Override
                public void onError(Call call, Exception e, int id) {
                    MyToast.showMessage("下载失败");
                    List<AppCompatActivity> activities = ((MyAppLication) getApplication()).getActivities();
                    for (AppCompatActivity activity : activities) {
                        activity.finish();
                    }
                }
                @Override
                public void onResponse(File response, int id) {
                    SPUtils.putBoolean("VersionUpdate", false);
                    progressDialog.dismiss();
                    Uri uri = Uri.fromFile(response);
                    Intent intent = new Intent(Intent.ACTION_VIEW);
                    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {//7.0系统
                        uri = FileProvider.getUriForFile
                                (MainActivity.this, "com.youpinwallet.ypw.provider", response);
                        intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);//添加这一句表示对目标应用临时授权该Uri所代表的文件
                    }
                    intent.setDataAndType(uri, "application/vnd.android.package-archive");
                    startActivity(intent);
                }
            });
}

<!-- 适配7.0系统数据 -->
<provider
    android:name="android.support.v4.content.FileProvider"
    android:authorities="自己的包名.provider"
    android:exported="false"
    android:grantUriPermissions="true">
    <meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/provider_paths" />
</provider>

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <paths>
        <external-path path="" name="camera_photos" />
    </paths>
</resources>