Android Studio：附件未附加到电子邮件

Question

嗨，我正在尝试创建文件并将其附加到电子邮件请求，但我不断收到错误消息

  

无法执行android：onClick的方法

摆脱行emailIntent.putExtra(Intent.EXTRA_STREAM, path);摆脱问题，但电子邮件丢失附件。通过错误测试，我的文件已经制作完成，并且路径确实存在，但是不会附加到我的电子邮件中

下面是我要运行的代码

    public void emailPpl(View v){
///////////////////////////////////////Create File//////////////////////////////

String filename = "data.sch";
            String eventName= getIntent().getStringExtra("eventName");
            String Location= getIntent().getStringExtra("Location");
            String starTime= getIntent().getStringExtra("startTime");
            String endTime= getIntent().getStringExtra("endTime");
            String date= getIntent().getStringExtra("date");

            String fileContents = eventName + "," + Location + "," + date + "," + starTime + "," + endTime + "\n";
            FileOutputStream outputStream;

            try {

                outputStream = openFileOutput(filename, Context.MODE_APPEND);
                outputStream.write(fileContents.getBytes());
                outputStream.close();
                Toast.makeText(this, "write complete",
                        Toast.LENGTH_LONG).show();
                System.out.print("Success gg");
            } catch (Exception e) {
                e.printStackTrace();
            }
//////////////////////////////////////////////////////////////////////////////
////////////////////////Begin Email Request//////////////////////////////////
            try{
                Log.i("Send email", "");
                EditText emails= findViewById(R.id.editText2);
                EditText Message= findViewById(R.id.editText4);
                String[] TO = emails.getText().toString().split(",");
                Intent emailIntent = new Intent(Intent.ACTION_SEND);
                emailIntent.setData(Uri.parse("mailto:"));
                emailIntent.setType("text/plain");
                emailIntent.putExtra(Intent.EXTRA_EMAIL, TO);
                File filelocation = new File(Environment.getExternalStorageDirectory().getAbsolutePath(), filename);
                Uri path = Uri.fromFile(filelocation);
                Log.d("path","file path confirmed           "+ path);
                emailIntent.putExtra(Intent.EXTRA_SUBJECT, "Your subject");
                emailIntent.putExtra(Intent.EXTRA_TEXT, Message.getText().toString()+"\n Thank you for using Family Scheduler");
                if (path != null) {
                    emailIntent.putExtra(Intent.EXTRA_STREAM, path);
                }

                startActivity(Intent.createChooser(emailIntent, "Send mail..."));
                Log.i("Finished sending email", "");
                Intent intent = new Intent(this, addevent.class);
                intent.putExtra("TO",TO);
            } catch (android.content.ActivityNotFoundException ex) {
                Toast.makeText(this,
                        "There is no email client installed.", Toast.LENGTH_SHORT).show();
            }
        }

这是错误

E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.wasi.familyschedualer, PID: 28031
    java.lang.IllegalStateException: Could not execute method for android:onClick
        at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293)
        at android.view.View.performClick(View.java:6294)
        at android.view.View$PerformClick.run(View.java:24770)
        at android.os.Handler.handleCallback(Handler.java:790)
        at android.os.Handler.dispatchMessage(Handler.java:99)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6494)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
     Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Method.invoke(Native Method)
        at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
        at android.view.View.performClick(View.java:6294) 
        at android.view.View$PerformClick.run(View.java:24770) 
        at android.os.Handler.handleCallback(Handler.java:790) 
        at android.os.Handler.dispatchMessage(Handler.java:99) 
        at android.os.Looper.loop(Looper.java:164) 
        at android.app.ActivityThread.main(ActivityThread.java:6494) 
        at java.lang.reflect.Method.invoke(Native Method) 
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438) 
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807) 
     Caused by: android.os.FileUriExposedException: file:///storage/emulated/0/data.sch exposed beyond app through ClipData.Item.getUri()
        at android.os.StrictMode.onFileUriExposed(StrictMode.java:1960)
        at android.net.Uri.checkFileUriExposed(Uri.java:2356)
        at android.content.ClipData.prepareToLeaveProcess(ClipData.java:942)
        at android.content.Intent.prepareToLeaveProcess(Intent.java:9850)
        at android.content.Intent.prepareToLeaveProcess(Intent.java:9856)
        at android.content.Intent.prepareToLeaveProcess(Intent.java:9835)
        at android.app.Instrumentation.execStartActivity(Instrumentation.java:1610)
        at android.app.Activity.startActivityForResult(Activity.java:4487)
        at android.support.v4.app.BaseFragmentActivityApi16.startActivityForResult(BaseFragmentActivityApi16.java:54)
        at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:67)
        at android.app.Activity.startActivityForResult(Activity.java:4445)
        at android.support.v4.app.FragmentActivity.startActivityForResult(FragmentActivity.java:720)
        at android.app.Activity.startActivity(Activity.java:4806)
        at android.app.Activity.startActivity(Activity.java:4774)
        at com.example.wasi.familyschedualer.invitingPpl.emailPpl(invitingPpl.java:64)