如何在android中使用intent发送电子邮件

我们可以通过intent在android中轻松发送电子邮件。你只需要编写以下几行代码即可

Intent email = new Intent(Intent.ACTION_SEND);
email.putExtra(Intent.EXTRA_EMAIL, new String[]{ to});
email.putExtra(Intent.EXTRA_SUBJECT, subject);
email.putExtra(Intent.EXTRA_TEXT, message);
	 
//need this to prompts email client only
email.setType("message/rfc822");

startActivity(Intent.createChooser(email, "Choose an Email client :"));

android中的电话示例

activity_main.xml

从面板上拖动2个EditText，1个MultiLine EditText，3个TextView和1个按钮，现在activity_main.xml文件将如下所示：

<RelativeLayout xmlns:androclass="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=".MainActivity" >

    <EditText
        android:id="@+id/editText1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:layout_marginRight="22dp"
        android:layout_marginTop="16dp"
        android:ems="10" />

    <EditText
        android:id="@+id/editText2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/editText1"
        android:layout_below="@+id/editText1"
        android:layout_marginTop="18dp"
        android:ems="10" >

        <requestFocus />
    </EditText>

    <EditText
        android:id="@+id/editText3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/editText2"
        android:layout_below="@+id/editText2"
        android:layout_marginTop="28dp"
        android:ems="10"
        android:inputType="textMultiLine" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/editText1"
        android:layout_alignBottom="@+id/editText1"
        android:layout_alignParentLeft="true"
        android:text="To:" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/editText2"
        android:layout_alignBottom="@+id/editText2"
        android:layout_alignParentLeft="true"
        android:text="Subject:" />

    <TextView
        android:id="@+id/textView3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/editText3"
        android:layout_alignBottom="@+id/editText3"
        android:layout_alignParentLeft="true"
        android:text="Message:" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/editText3"
        android:layout_below="@+id/editText3"
        android:layout_marginLeft="76dp"
        android:layout_marginTop="20dp"
        android:text="Send" />

</RelativeLayout>

活动类

让我们编写代码以通过意图发送电子邮件。

package com.example.sendemail;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends Activity {
	EditText editTextTo, editTextSubject, editTextMessage;
	Button send;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		editTextTo=(EditText)findViewById(R.id.editText1);
		editTextSubject=(EditText)findViewById(R.id.editText2);
		editTextMessage=(EditText)findViewById(R.id.editText3);
		
		send=(Button)findViewById(R.id.button1);
		
		send.setOnClickListener(new OnClickListener(){

			@Override
			public void onClick(View arg0) {
				 String to=editTextTo.getText().toString();
				 String subject=editTextSubject.getText().toString();
				 String message=editTextMessage.getText().toString();
				 
				
				 Intent email = new Intent(Intent.ACTION_SEND);
				  email.putExtra(Intent.EXTRA_EMAIL, new String[]{ to});
				  email.putExtra(Intent.EXTRA_SUBJECT, subject);
				  email.putExtra(Intent.EXTRA_TEXT, message);
	 
				  //need this to prompts email client only
				  email.setType("message/rfc822");
	 
				  startActivity(Intent.createChooser(email, "Choose an Email client :"));
	 
			}
			
		});
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.activity_main, menu);
		return true;
	}

}