美好的一天。我正在尝试制作一个应用程序，使您可以选择图像（从有图像的任何地方的画廊中选择）并通过电子邮件发送。进行全方位搜索，但是您无法发送图像，仅发送文本很简单...但是图像变得复杂。我附上我认为最有可能执行的代码。这不是我的财产，所以我留下了创建者的链接。 https://www.javacodegeeks.com/2013/10/send-email-with-attachment-in-android.html
MainActivity.java
public class MainActivity extends Activity implements OnClickListener {
EditText editTextEmail, editTextSubject, editTextMessage;
Button btnSend, btnAttachment;
String email, subject, message, attachmentFile;
Uri URI = null;
private static final int PICK_FROM_GALLERY = 101;
int columnIndex;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
editTextEmail = (EditText) findViewById(R.id.editTextTo);
editTextSubject = (EditText) findViewById(R.id.editTextSubject);
editTextMessage = (EditText) findViewById(R.id.editTextMessage);
btnAttachment = (Button) findViewById(R.id.buttonAttachment);
btnSend = (Button) findViewById(R.id.buttonSend);
btnSend.setOnClickListener(this);
btnAttachment.setOnClickListener(this);
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == PICK_FROM_GALLERY && resultCode == RESULT_OK) {
/**
* Get Path
*/
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage,filePathColumn, null, null, null);
cursor.moveToFirst();
columnIndex = cursor.getColumnIndex(filePathColumn[0]);
attachmentFile = cursor.getString(columnIndex);
Log.e("Attachment Path:", attachmentFile);
URI = Uri.parse("file://" + attachmentFile);
cursor.close();
}
}
@Override
public void onClick(View v) {
if (v == btnAttachment) {
openGallery();
}
if (v == btnSend) {
try {
email = editTextEmail.getText().toString();
subject = editTextSubject.getText().toString();
message = editTextMessage.getText().toString();
final Intent emailIntent = new Intent(
android.content.Intent.ACTION_SEND);
emailIntent.setType("plain/text");
emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL,
new String[] { email });
emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT,
subject);
if (URI != null) {
emailIntent.putExtra(Intent.EXTRA_STREAM, URI);
}
emailIntent
.putExtra(android.content.Intent.EXTRA_TEXT, message);
this.startActivity(Intent.createChooser(emailIntent,
"Sending email..."));
} catch (Throwable t) {
Toast.makeText(this,
"Request failed try again: " + t.toString(),
Toast.LENGTH_LONG).show();
}
}
}
public void openGallery() {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
intent.putExtra("return-data", true);
startActivityForResult(
Intent.createChooser(intent, "Complete action using"),
PICK_FROM_GALLERY);
}}
activity_main.xml
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="5dp"
tools:context=".MainActivity" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="5dp"
android:padding="5dp" >
<EditText
android:id="@+id/editTextTo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_margin="5dp"
android:hint="Email Address!"
android:inputType="textEmailAddress"
android:singleLine="true" />
<EditText
android:id="@+id/editTextSubject"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@id/editTextTo"
android:layout_margin="5dp"
android:hint="Subject"
android:singleLine="true" />
<EditText
android:id="@+id/editTextMessage"
android:layout_width="match_parent"
android:layout_height="200dp"
android:layout_below="@id/editTextSubject"
android:layout_margin="5dp"
android:gravity="top|left"
android:hint="type message here!"
android:inputType="textMultiLine" />
<Button
android:id="@+id/buttonSend"
android:layout_width="80dp"
android:layout_height="50dp"
android:layout_below="@id/editTextMessage"
android:layout_margin="5dp"
android:text="Send" />
<Button
android:id="@+id/buttonAttachment"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:text="attachment" />
</RelativeLayout>
AndroidManifest
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_INTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
我认为当您尝试获取文件地址时会出现错误。 在这一部分：
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage,filePathColumn, null, null, null);
cursor.moveToFirst();
columnIndex = cursor.getColumnIndex(filePathColumn[0]);
attachmentFile = cursor.getString(columnIndex);
Log.e("Attachment Path:", attachmentFile);
URI = Uri.parse("file://" + attachmentFile);
cursor.close();
希望您能帮助我解决此问题，或指导我创建另一个代码。我需要的是用户选择要发送的图像，该图像是通过电子邮件发送的。 对不起，如果写错了。英语不是我的母语。