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Thursday, 25 October 2012

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

02:27
Refer to the last exercise "Start activity to send email with multiple images attached, with build-in MediaStore.Images.Media selector", it always send email with images attached. So I want to have a spinner with pre-defined email subjects for user to easy choice.

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

Create /res/values/array.xml to provide the pre-defined email subjects.
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name="subject">
<item>My Photos</item>
<item>Share with you</item>
<item>Please check</item>
<item>Hello Friend</item>
</string-array>
</resources>


Modify layout to replace EditText of email subject with a <Spinner>.
<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="Choice Subject:"/>
<Spinner
android:id="@+id/spinner_subject"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<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>


Modify the code:
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;
import android.widget.Spinner;

public class MainActivity extends Activity {

EditText edittextEmailAddress;
Spinner spinnerSubject;
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);
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);

//Prepare Spinner for subject
spinnerSubject = (Spinner)findViewById(R.id.spinner_subject);
ArrayAdapter<CharSequence> adapterSpinnerSubject = ArrayAdapter.createFromResource(this, R.array.subject, android.R.layout.simple_spinner_item);
adapterSpinnerSubject.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinnerSubject.setAdapter(adapterSpinnerSubject);
}

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();

//retrieve spinnerSubject selection
String emailSubject = spinnerSubject.getSelectedItem().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;
}
}
}

}


download filesDownload the files.


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