shareVideo（）方法并非突然起作用

Question

在我开发的android应用中，用户应该能够录制视频，观看视频并通过应用内的电子邮件发送视频。我弄清楚了工作代码，这些动作运行良好，但是后来我的Android Studio疯狂了，几乎每个文件的代码都被iself弄乱了，所以我被迫在同一项目中再次编写代码。但是在那之后，尽管代码完全相同，但是它不再起作用。运行日志不会出现错误，但是应用程序不会崩溃。权限应该可以。

问题可能出在其他地方吗？ Build.gradle？ Settings.gradle？还是其他可能性？

以下是XML文件中的代码：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  tools:context=".VideoContactActivity">

  <TextView
    android:id="@+id/textView_recordVideo"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/record_video"
    android:textColor="@color/colorTitles1"
    android:textSize="@dimen/text_record_video"
    android:fontFamily="@font/cinzel_bold"
    android:layout_marginStart="70dp"
    android:layout_marginTop="160dp"
    android:layout_centerHorizontal="true"/>

  <Button
    android:id="@+id/record_video"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@id/textView_recordVideo"
    android:layout_marginTop="100dp"
    android:layout_marginStart="130dp"
    android:text="@string/startrRecording"
    android:textSize="@dimen/text_record_video"
    android:fontFamily="@font/cinzel_bold"
    android:textColor="@color/colorTitles2"
    android:onClick="captureVideo"/>

  <Button
    android:id="@+id/check_video"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@id/record_video"
    android:layout_marginTop="40dp"
    android:layout_marginStart="80dp"
    android:text="@string/check_recording"
    android:textSize="@dimen/text_record_video"
    android:fontFamily="@font/cinzel_bold"
    android:textColor="@color/colorTitles2"
    android:onClick="playVideo"/>

  <Button
    android:id="@+id/send_video"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@id/check_video"
    android:layout_marginTop="40dp"
    android:layout_marginStart="130dp"
    android:text="@string/send_video"
    android:textSize="@dimen/text_record_video"
    android:fontFamily="@font/cinzel_bold"
    android:textColor="@color/colorTitles2"
    android:onClick="shareVideo"/>

</RelativeLayout>

和Java文件：

package com.example.mobdog;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.content.Intent;
import android.media.MediaScannerConnection;
import android.net.Uri;
import android.os.Handler;
import android.provider.MediaStore;
import android.support.v7.widget.ContentFrameLayout;
import android.view.View;
import android.widget.Gallery;

public class YhteysKouluttajaanActivity extends AppCompatActivity {
  private static int VIDEO_REQUEST = 101;
  private Uri videoUri = null;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_video_contact);
  }
  public void captureVideo(View view)
  {
    Intent videoIntent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);

    if(videoIntent.resolveActivity(getPackageManager()) !=null)
    {
      startActivityForResult(videoIntent, VIDEO_REQUEST);
    }
  }

  public void playVideo(View view)
  {
    Intent playIntent = new Intent(this, VideoPlayActivity.class);
    playIntent.putExtra("videoUri", videoUri.toString());
    startActivity(playIntent);
  }

  public void shareVideo(View view) {
    Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
    emailIntent.putExtra(Intent.EXTRA_SUBJECT, "My problem");
    emailIntent.putExtra(Intent.EXTRA_TEXT, "I'd like to get help for this kind of problem");
    emailIntent.putExtra(Intent.EXTRA_STREAM, Uri.parse(videoUri.toString()));
    emailIntent.setData(Uri.parse("my-email@outlook.com"));
    if (emailIntent.resolveActivity(getPackageManager()) != null) {
      startActivity(emailIntent);
    }
  }

  @Override
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {

    if(requestCode==VIDEO_REQUEST && resultCode==RESULT_OK)
    {
      videoUri = data.getData();
    }
}
}

谢谢。