Start activity to send email with multiple images attached, with build-in MediaStore.Images.Media selector.

The previous post demonstrate how to "Start activity to send email with multi images attached" using Android's Gallery App select images one-by-one. And the post "List images in MediaStore.Images.Media, with multiple selection" demonstrate how to implement our own image files selector. They are merged to have our own images selector to attach images in email.

package com.example.androidselectmultifiles;

import java.util.ArrayList;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.v4.content.CursorLoader;
import android.support.v4.widget.CursorAdapter;
import android.support.v4.widget.SimpleCursorAdapter;
import android.app.Activity;
import android.content.Intent;
import android.database.Cursor;
import android.util.SparseBooleanArray;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListAdapter;
import android.widget.ListView;

public class MainActivity extends Activity {
 
 EditText edittextEmailAddress;
 EditText edittextEmailSubject;
    EditText edittextEmailText;
 Button btnSend;
 ListView listViewFiles;
 
 ArrayList<Uri> arrayUri = new ArrayList<Uri>();
 ArrayAdapter<Uri> myFileListAdapter;
 
    final int RQS_SENDEMAIL = 1;
    
    SimpleCursorAdapter listAdapter;
    
    final Uri sourceUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
    ListAdapter adapter;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        edittextEmailAddress = (EditText)findViewById(R.id.email_address);
        edittextEmailSubject = (EditText)findViewById(R.id.email_subject);
        edittextEmailText = (EditText)findViewById(R.id.email_text);
        
        btnSend = (Button)findViewById(R.id.send);
        btnSend.setOnClickListener(btnSendOnClickListener);

        listViewFiles = (ListView)findViewById(R.id.filelist);
        String[] from = {MediaStore.MediaColumns.TITLE};
        int[] to = {android.R.id.text1};

        CursorLoader cursorLoader = new CursorLoader(
          this, 
          sourceUri, 
          null, 
          null, 
          null, 
          MediaStore.Audio.Media.TITLE);
        
        Cursor cursor = cursorLoader.loadInBackground();
        listAdapter = new SimpleCursorAdapter(
          this, 
          android.R.layout.simple_list_item_multiple_choice, 
          cursor, 
          from, 
          to, 
          CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
        
        listViewFiles.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
        
        listViewFiles.setAdapter(listAdapter);
    }
    
    private ArrayList<Uri> getSelectedFiles(){
     ArrayList<Uri> arrayU = new ArrayList<Uri>();
     
     SparseBooleanArray checkedArray = listViewFiles.getCheckedItemPositions();
     
     for(int i=0; i<checkedArray.size(); i++)
        {
      int pos = checkedArray.keyAt(i);
      Cursor cursor = listAdapter.getCursor();
      cursor.moveToPosition(pos);
      String _id = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media._ID));
      Uri selUri = Uri.withAppendedPath(sourceUri, _id);
      arrayU.add(selUri);
        }
     
     return arrayU;
    }
  
 OnClickListener btnSendOnClickListener
 = new OnClickListener(){

  @Override
  public void onClick(View v) {
   
   arrayUri = getSelectedFiles();

   String emailAddress = edittextEmailAddress.getText().toString();
   String emailSubject = edittextEmailSubject.getText().toString();
   String emailText = edittextEmailText.getText().toString();
   String emailAddressList[] = {emailAddress};
   
   Intent intent = new Intent();
   intent.putExtra(Intent.EXTRA_EMAIL, emailAddressList);  
   intent.putExtra(Intent.EXTRA_SUBJECT, emailSubject); 
   intent.putExtra(Intent.EXTRA_TEXT, emailText);
   
   if(arrayUri.isEmpty()){
    //Send email without photo attached
    intent.setAction(Intent.ACTION_SEND);
    intent.setType("plain/text"); 
   }else if(arrayUri.size() == 1){
    //Send email with ONE photo attached
    intent.setAction(Intent.ACTION_SEND); 
    intent.putExtra(Intent.EXTRA_STREAM, arrayUri.get(0));
       intent.setType("image/*");
   }else{
    //Send email with MULTI photo attached
    intent.setAction(Intent.ACTION_SEND_MULTIPLE);
    intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, arrayUri);
       intent.setType("image/*");
   }
   
   startActivity(Intent.createChooser(intent, "Choice App to send email:"));
  }};

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

  super.onActivityResult(requestCode, resultCode, data);
  
  if (resultCode == RESULT_OK){
   switch(requestCode){
   case RQS_SENDEMAIL:
    break; 
   }
  }
 }

}

<LinearLayout 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" 
    android:orientation="vertical">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world"
        tools:context=".MainActivity" />
    
    <TextView 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Enter email address:"/>
    <EditText 
        android:id="@+id/email_address"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:inputType="textEmailAddress"/>
    <TextView 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Enter email Subject:"/>
    <EditText 
        android:id="@+id/email_subject"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:inputType="textEmailSubject"/>
    <TextView 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="Enter Text:"/>
    <EditText 
        android:id="@+id/email_text"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"/>
    
    <Button
        android:id="@+id/send"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Send"/>
    <ListView
        android:id="@+id/filelist"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

</LinearLayout>

Download the files.

Next:
- email send images exercise, with spinner of pre-defined subjects.