Android-如何发送字符串数组作为电子邮件正文

Question

我需要发送一些数据作为电子邮件按钮click.I成功添加数据从编辑text.But我不知道如何发送数据从我的数据库中的数组。代码我需要发送PN [I] .I附加值的值等this.but它在这一行

emailIntent.putExtra(android.content.Intent.EXTRA_TEXT,"name:"+edt1.getText().toString()+"\n"+"products:"+pn[i]); 

代码引起错误：

btn.setOnClickListener(new OnClickListener() { 

     @Override 
     public void onClick(View v) { 
      // TODO Auto-generated method stub 
      mydb=buy_ltr.this.openOrCreateDatabase("addcart", MODE_PRIVATE, null); 
      Cursor cr = mydb.rawQuery("SELECT * FROM add2cart WHERE usr='"+cont+"'", null); 
      String [] pn = new String[cr.getCount()]; 

      int i = 0; 
      while(cr.moveToNext()) 
      { 

       String prp = cr.getString(cr.getColumnIndex("prate")); 
       pn[i] = prp; 
       i++; 
      } 


       Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND); 
       String[] recipients = new String[]{"my@email.com", "",}; 
       emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL, recipients); 
       emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, "Test"); 
       emailIntent.putExtra(android.content.Intent.EXTRA_TEXT, "This is email's message"); 
       emailIntent.putExtra(android.content.Intent.EXTRA_TEXT,"name:"+edt1.getText().toString()+"\n"+"address:"+edt2.getText().toString()+"\n"+"products:"+pn[i]); 
       emailIntent.setType("text/plain"); 
    //  emailIntent.setType("message/rfc822"); 
       startActivity(Intent.createChooser(emailIntent, "Send mail...")); 
       finish(); 

     } 
    }); 

Answer 1

方法一：（内建方法）

String productNames = Arrays.toString(pn); 

方法二：（在新行每个产品）

StringBuilder productNamesBuilder = new StringBuilder(); 
for(String productName: pn){ 
    productNamesBuilder.append(productName + "\n"); 
} 
String productNames = productNamesBuilder.toString(); 

方法三：（编号列表，在新行每个产品）

StringBuilder productNamesBuilder = new StringBuilder(); 
for(int i = 0; i < pn.length; i++){ 
    productNamesBuilder.append((i + 1) + " " + pn[i] + "\n"); 
} 
String productNames = productNamesBuilder.toString();