在创建Uri uri时，应用程序正在崩溃

package com.example.renu.customlead; import android.content.Context; import android.content.ContextWrapper; import android.content.Intent; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.support.v4.content.FileProvider; import android.support.v7.app.AppCompatActivity; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; import java.io.BufferedReader; import java.io.DataInputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.FileWriter; import java.io.IOException; import java.io.InputStreamReader; import java.io.OutputStream; import java.io.OutputStreamWriter; import java.util.Calendar; /** * Created by RENU on 2/4/2018. */ public class MainLandingPage extends AppCompatActivity { private String filename = "MySampleFile.txt"; private String filepath = "MyFileStorage"; File myInternalFile; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main2); } public void AddLead(View view) { DatabaseHelper dbhelper = new DatabaseHelper(getApplicationContext()); SQLiteDatabase db = dbhelper.getReadableDatabase(); Cursor curCSV = db.rawQuery("SELECT * FROM Leads ", null); int n=curCSV.getCount(); if (n >= 1) { Intent intent = new Intent(this, MainActivity3.class); startActivity(intent); } else{ Toast.makeText(MainLandingPage.this, "No Field has been declared", Toast.LENGTH_SHORT).show(); } } public void SendCsv(View view) { sendEmail(); } public void DeleteRecord(View view) { DatabaseHelper dbhelper = new DatabaseHelper(getApplicationContext()); SQLiteDatabase db = dbhelper.getReadableDatabase(); Cursor curCSV = db.rawQuery("SELECT * FROM Leads where id  1", null); int n = curCSV.getCount(); if (n > 1) { deleteRecordALL(); Toast.makeText(MainLandingPage.this, "Leads Deleted", Toast.LENGTH_SHORT).show(); } else { Toast.makeText(MainLandingPage.this, "No Leads to be Deleted", Toast.LENGTH_SHORT).show(); } } public void DeleteAll(View view) { DatabaseHelper dbhelper = new DatabaseHelper(getApplicationContext()); SQLiteDatabase db = dbhelper.getReadableDatabase(); Cursor curCSV = db.rawQuery("SELECT * FROM Leads ", null); int n=curCSV.getCount(); if (n > 1) { deleteRecordALL(); Toast.makeText(MainLandingPage.this, "Leads Deleted", Toast.LENGTH_SHORT).show(); } else{ Toast.makeText(MainLandingPage.this, "No Leads to be Deleted", Toast.LENGTH_SHORT).show(); } } protected void deleteRecordALL() { DatabaseHelper dbhelper = new DatabaseHelper(getApplicationContext()); //SQLiteDatabase db = dbhelper.getReadableDatabase(); //db1.execSQL("delete from Leads"); Log.d("Delete: ", "Deleting .."); dbhelper.deleteRec(); } public void createField(View view){ Intent intenti = new Intent(MainLandingPage.this, MainActivity.class); startActivity(intenti); } // export sqlite content to csv // private void exportDB() { // // // } protected void sendEmail() { //File dbFile = getDatabasePath("LeadsManager.db"); /storage/emulated/0 DatabaseHelper dbhelper = new DatabaseHelper(getApplicationContext()); ContextWrapper contextWrapper = new ContextWrapper(getApplicationContext()); File directory = contextWrapper.getDir(filepath, Context.MODE_PRIVATE); myInternalFile = new File(directory , filename); //File file = new File(Environment.getExternalStorageDirectory() + File.separator + "data.csv"); /*File mfolder = new File(getFilesDir().getPath()); File file = new File("/storage/emulated/0/Android/data/com.example.renu.customlead/files" + "/data.csv"); if (!mfolder.exists()) { mfolder.mkdirs(); } if (!file.exists()) { try { file.createNewFile(); } catch (IOException e) { e.printStackTrace(); } } Log.e("Main file name", file.getName()); Log.e("Internalpath",getCacheDir().getPath()); Log.e("Path",getFilesDir().getPath()); Log.e("fileexists", String.valueOf(file.exists())); Log.e("Path",Environment.getExternalStorageDirectory().getPath()); */ try { //file.createNewFile(); //CSVWriter csvWrite = new CSVWriter(new FileWriter(file)); FileOutputStream fOut = new FileOutputStream(myInternalFile); OutputStreamWriter myOutWriter = new OutputStreamWriter(fOut); SQLiteDatabase db = dbhelper.getReadableDatabase(); Cursor curCSV = db.rawQuery("SELECT * FROM Leads ", null); //myOutWriter.writeNext(curCSV.getColumnNames()); while (curCSV.moveToNext()) { //Which column you want to exprort String arrStr[] = {curCSV.getString(0), curCSV.getString(1)}; Log.e("firstsql",arrStr[1]); Log.e("firstsql1",arrStr[0]); //myOutWriter.append(arrStr[0]); myOutWriter.append(arrStr[1]); myOutWriter.append("\n"); } myOutWriter.close(); curCSV.close(); Log.e("Main", String.valueOf(myInternalFile.length())); } catch (Exception sqlEx) { Log.e("MainActivity", sqlEx.getMessage(), sqlEx); } Log.i("Send email", ""); String[] TO = {""}; String[] CC = {""}; Intent emailIntent = new Intent(Intent.ACTION_SEND); // emailIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); emailIntent.setData(Uri.parse("mailto:")); emailIntent.setType("text/plain"); emailIntent.putExtra(Intent.EXTRA_EMAIL, TO); emailIntent.putExtra(Intent.EXTRA_CC, CC); emailIntent.putExtra(Intent.EXTRA_SUBJECT, "Lead created as of " + Calendar.getInstance().getTime()); emailIntent.putExtra(Intent.EXTRA_TEXT, myInternalFile.getAbsolutePath()); // emailIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(myInternalFile)); Log.e("ppppp", myInternalFile.getName()); emailIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); // emailIntent.setType("text/*"); Uri uri = FileProvider.getUriForFile(MainLandingPage.this, "com.example.renu.customlead",myInternalFile); //data/user/0/com.example.renu.customlead/app_MyFileStorage/MySampleFile.txt //com.example.renu.customlead/files/MySampleFile.txt //Uri uri = Uri.parse("content://com.example.renu.customlead/files/MySampleFile.txt"); emailIntent.putExtra(Intent.EXTRA_STREAM, uri); Log.e("xxyyxx", myInternalFile.getName()); Log.e("xxyyxxx", myInternalFile.getPath()); Log.e("xxyyxxxx", myInternalFile.getAbsoluteFile().getName()); String myData=""; try { FileInputStream fis = new FileInputStream(myInternalFile); DataInputStream in = new DataInputStream(fis); BufferedReader br = new BufferedReader(new InputStreamReader(in)); String strLine; while ((strLine = br.readLine()) != null) { myData = myData + "\n" + strLine; } Log.e("aaaaaaaaaaaaaaa",myData); in.close(); } catch (IOException e) { e.printStackTrace(); } emailIntent.putExtra(Intent.EXTRA_TEXT, myData); try { //startActivity(Intent.createChooser(emailIntent, "Send mail...")); startActivityForResult(Intent.createChooser(emailIntent,"Sending mail Done "),1); finish(); Log.i("Finished sending email", "email xxxx"); } catch (android.content.ActivityNotFoundException ex) { Toast.makeText(MainLandingPage.this, "There is no email client installed.", Toast.LENGTH_SHORT).show(); } } } 

程序因以下错误而失败

 03-07 11:50:24.524 27630-27630/? E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.renu.customlead, PID: 27630 java.lang.IllegalStateException: Could not execute method for android:onClick at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293) at android.view.View.performClick(View.java:6261) at android.widget.TextView.performClick(TextView.java:11159) at android.view.View$PerformClick.run(View.java:23748) at android.os.Handler.handleCallback(Handler.java:751) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6776) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1496) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1386) Caused by: java.lang.reflect.InvocationTargetException at java.lang.reflect.Method.invoke(Native Method) at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288) at android.view.View.performClick(View.java:6261) at android.widget.TextView.performClick(TextView.java:11159) at android.view.View$PerformClick.run(View.java:23748) at android.os.Handler.handleCallback(Handler.java:751) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6776) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1496) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1386) Caused by: java.lang.IllegalArgumentException: Failed to find configured root that contains /data/data/com.example.renu.customlead/app_MyFileStorage/MySampleFile.txt at android.support.v4.content.FileProvider$SimplePathStrategy.getUriForFile(FileProvider.java:711) at android.support.v4.content.FileProvider.getUriForFile(FileProvider.java:400) at com.example.renu.customlead.MainLandingPage.sendEmail(MainLandingPage.java:182) at com.example.renu.customlead.MainLandingPage.SendCsv(MainLandingPage.java:61) at java.lang.reflect.Method.invoke(Native Method) at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288) at android.view.View.performClick(View.java:6261) at android.widget.TextView.performClick(TextView.java:11159) at android.view.View$PerformClick.run(View.java:23748) at android.os.Handler.handleCallback(Handler.java:751) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6776) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1496) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1386)