當我在 android 中單擊按鈕時如何撰寫電子郵件？

Question

我有一個編輯文本和一個保存按鈕。 我的編輯文本提供了電子郵件地址，並且有一個發送按鈕可以發送帶有附件的電子郵件，但我不知道如何為文件附件編碼？

Answer 1

主要活動.java：

public class MainActivity extends AppCompatActivity {

    String email;

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

        EditText editText = (EditText) findViewById(R.id.et_email);
        email = editText.getText().toString().trim();
    }

    public void SendEmail(View view){
        Intent intent = new Intent(Intent.ACTION_SENDTO);
        intent.setData(Uri.parse("mailto:")); // only email apps should handle this
        intent.putExtra(Intent.EXTRA_EMAIL, email);
        if (intent.resolveActivity(getPackageManager()) != null) {
            startActivity(intent);
        }
    }
}

activity_main.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <EditText
        android:id="@+id/et_email"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Send Email"
        android:onClick="SendEmail"/>

</LinearLayout>

Answer 2

嘗試一下

 private void sendmail() {
 String   mail=mailid.getText().toString();
 String   msubject=subject.getText().toString();
 String   mbody=body.getText().toString();

    Log.i("Send email", "");
    String[] TO = {mail};
    Intent emailIntent = new Intent(Intent.ACTION_SEND);
    emailIntent.setData(Uri.parse("mailto:"));
    emailIntent.setType("text/plain");
    emailIntent.putExtra(Intent.EXTRA_EMAIL, TO);
    emailIntent.putExtra(Intent.EXTRA_SUBJECT, "Static subject "+ msubject);
    emailIntent.putExtra(Intent.EXTRA_TEXT, "Static body "+ mbody);

    try {
        startActivity(Intent.createChooser(emailIntent, "Send mail..."));
        finish();

    } catch (android.content.ActivityNotFoundException ex) {
        Toast.makeText(MainActivity.this, "There is no email client installed.", 
        Toast.LENGTH_SHORT).show();
    }}