使用隐式意图发送电子邮件

问题描述：

以下是用于发送电子邮件的java和xml文件。请验证代码。我已经注册了该按钮，但它仍然无法正常工作。使用隐式意图发送电子邮件

ERROR: Failed to set EGL_SWAP_BEHAVIOR on surface 0xe2d19220, error=EGL_SUCCESS.Skipped 37 frames! The application may be doing too much work on its main thread

MainActivity.java

public void onClick(View view) {   
    Intent intent = null, 
    intent = new Intent(Intent.ACTION_SEND);  
    intent.setData(Uri.parse("mailto:")); 
    String[] to = {"[email protected]", ""}; 
    intent.putExtra(Intent.EXTRA_EMAIL, to); 
    intent.putExtra(Intent.EXTRA_SUBJECT, "subject to your app"); 
    intent.putExtra(Intent.EXTRA_TEXT, "text inside email"); 
    intent.setType("message/rfc822"); 
    chooser = Intent.createChooser(intent, "Send email"); 
    startActivity(chooser); 
}

activity_main.xml中

<Button 
    android:id="@+id/btn2" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="Send Email" 
    />

请解释 “详细” 什么 “不工作” 的意思。请注意，[ACTION_SENDTO'没有记录以支持任何这些附加内容]（https://developer.android.com/reference/android/content/Intent.html#ACTION_SENDTO），并且'Uri'应该是识别收件人。 – CommonsWare

点击一个按钮，什么也没有发生。我在这里做错了什么？ – Honey

也许你没有把这个'onClick（）'方法连接到按钮。它应该开始一个活动，或者你应该用'ActivityNotFoundException'来崩溃。 – CommonsWare

答

这里是如何从xml (btn1)和code (btn2)连线按钮。

MainActivity.java

package *.com.saturday; 

import android.content.Intent; 
import android.net.Uri; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.Button; 

public class MainActivity extends AppCompatActivity implements View.OnClickListener { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     // thru code (btn2) 
     Button button = (Button)findViewById(R.id.btn2); 
     button.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       Intent intent = new Intent(Intent.ACTION_SEND); 
       intent.setData(Uri.parse("mailto:")); 
       String[] to = {"[email protected]", ""}; 
       intent.putExtra(Intent.EXTRA_EMAIL, to); 
       intent.putExtra(Intent.EXTRA_SUBJECT, "subject to your app"); 
       intent.putExtra(Intent.EXTRA_TEXT, "text inside email"); 
       intent.setType("message/rfc822"); 
       Intent chooser = Intent.createChooser(intent, "Send email"); 
       startActivity(chooser); 
      } 
     }); 
    } 

    // thru xml (btn1) 
    @Override 
    public void onClick(View view) { 
     Intent intent = new Intent(Intent.ACTION_SEND); 
     intent.setData(Uri.parse("mailto:")); 
     String[] to = {"[email protected]", ""}; 
     intent.putExtra(Intent.EXTRA_EMAIL, to); 
     intent.putExtra(Intent.EXTRA_SUBJECT, "subject to your app"); 
     intent.putExtra(Intent.EXTRA_TEXT, "text inside email"); 
     intent.setType("message/rfc822"); 
     Intent chooser = Intent.createChooser(intent, "Send email"); 
     startActivity(chooser); 
    } 
}

activity_main.xml中

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    tools:context="*.com.saturday.MainActivity"> 

    <Button 
     android:id="@+id/btn1" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_marginTop="10dp" 
     android:text="Send Email from xml" 
     android:onClick="onClick"/> 

    <Button 
     android:id="@+id/btn2" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_below="@id/btn1" 
     android:layout_marginTop="10dp" 
     android:text="Send Email from mainactivity"/> 

</RelativeLayout>

使用隐式意图发送电子邮件

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