import java.util.regex.Matcher;import java.util.regex.Pattern;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.KeyEvent;import android.view.View;import android.view.View.OnClickListener;import android.view.View.OnKeyListener;import android.widget.Button;import android.widget.EditText;public class A04Activity extends Activity { private EditText reciver,cc,subject,body; private Button b; private String[] strReciver; private String[] strCc; private String strBody; private String strSubject;  /** Called when the activity is first created. */  @Override  public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.main);    b=(Button)findViewById(R.id.button);    b.setEnabled(false);     b.setText("發送郵件");    reciver=(EditText)findViewById(R.id.reciver);    subject=(EditText)findViewById(R.id.subject);    cc=(EditText)findViewById(R.id.cc);    body=(EditText)findViewById(R.id.body);    reciver.setText("請輸入郵箱地址"); //設置默認字段    body.setText("請輸入郵件內容");    subject.setText("請輸入主題");    cc.setText("請輸入郵件的字段");    //點擊編輯框，進入可編輯狀態    reciver.setOnClickListener(new OnClickListener(){  @Override  public void onClick(View v) {  // TODO Auto-generated method stub  reciver.setText("");  }    });    cc.setOnClickListener(new OnClickListener(){  @Override  public void onClick(View v) {  // TODO Auto-generated method stub  cc.setText("");  }    });    subject.setOnClickListener(new OnClickListener(){  @Override  public void onClick(View v) {  // TODO Auto-generated method stub  subject.setText("");  }    });    body.setOnClickListener(new OnClickListener(){  @Override  public void onClick(View v) {  // TODO Auto-generated method stub  body.setText("");  }    });    reciver.setOnKeyListener(new OnKeyListener(){  @Override  public boolean onKey(View v, int keyCode, KeyEvent event) {  // TODO Auto-generated method stub  if(isEmail(reciver.getText().toString())){   b.setEnabled(true);  }  else{   b.setEnabled(false);  }  return false;  }    });    b.setOnClickListener(new OnClickListener(){  @Override  public void onClick(View v) {  // TODO Auto-generated method stub  strReciver=new String[]{reciver.getText().toString()};  strCc=new String[]{cc.getText().toString()};  strSubject=subject.getText().toString();  strBody=body.getText().toString();  Intent i=new Intent(android.content.Intent.ACTION_SEND);  i.putExtra(android.content.Intent.EXTRA_EMAIL, strReciver);  i.putExtra(android.content.Intent.EXTRA_CC, strCc);  i.putExtra(android.content.Intent.EXTRA_SUBJECT, strSubject);  i.putExtra(android.content.Intent.EXTRA_TEXT, strBody);  startActivity(Intent.createChooser(i, getResources().getString(R.string.str_message)));  }    });  }  public static boolean isEmail(String s){   String expression="^[a-zA-Z][//w//.-]*[a-zA-Z0-9]@[a-zA-Z0-9][//w//.-]*[a-zA-Z0-9]//.[a-zA-Z][a-zA-Z//.]*[a-zA-Z]$";   Pattern p=Pattern.compile(expression);   Matcher m=p.matcher(s);   return m.matches();  }}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="fill_parent"  android:layout_height="fill_parent"  android:orientation="vertical" >  <TextView    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="@string/hello" />  <Button     android:id="@+id/button"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    />  <EditText     android:id="@+id/reciver"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    />  <EditText     android:id="@+id/cc"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    />  <EditText     android:id="@+id/subject"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    />  <EditText     android:id="@+id/body"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    /></LinearLayout>

Uri uri=Uri.parse("mailTo:1650***185@qq.com");Intent i=new Intent(Intent.ACTION_SENDTO,uri);startActivity(i);

Intent i=new Intent(Intent.ACTION_SEND);String[] tos={"1650***185@qq.com"};String[] ccs={"7885***158@qq.com"};i.putExtra(Intent.EXTRA_EMALL,tos);i.putExtra(Intent.EXTRA_CC,ccs);i.putExtra(Intent.EXTRA_TEXT,"郵件內容");i.putExtra(Intent.EXTRA_SUBJECT,"郵件主題");i.setType("message/rfc822");startActivity(Intent.createChooser(i,"你的郵件"));

Intent i=new Intent(Intent.ACTION_SEND);i.putExtra(Intent.EXTRA_SUBJECT,"郵件主題");i.putExtra(Intent.EXTRA_STREAM, "file:///sdcard/xyz.mp3");startActivity(Intent.createChooser(i,"你的郵件"));