Properly closing InputStreams to avoid StrictMode warnings

src/com/fsck/k9/mail/internet/BinaryTempFileBody.java

@@ -45,13 +45,16 @@ public class BinaryTempFileBody implements Body {
 
     public void writeTo(OutputStream out) throws IOException, MessagingException {
         InputStream in = getInputStream();
-        Base64OutputStream base64Out = new Base64OutputStream(out);
         try {
-            IOUtils.copy(in, base64Out);
+            Base64OutputStream base64Out = new Base64OutputStream(out);
+            try {
+                IOUtils.copy(in, base64Out);
+            } finally {
+                base64Out.close();
+            }
         } finally {
-            base64Out.close();
+            in.close();
         }
-        mFile.delete();
     }
 
     class BinaryTempFileBodyInputStream extends FilterInputStream {
@@ -61,8 +64,11 @@ public class BinaryTempFileBody implements Body {
 
         @Override
         public void close() throws IOException {
-            super.close();
+            try {
-            mFile.delete();
+                super.close();
+            } finally {
+                mFile.delete();
+            }
         }
     }
 }

src/com/fsck/k9/mail/internet/MimeUtility.java

@@ -1061,7 +1061,18 @@ public class MimeUtility {
                      * the stream is now wrapped we'll remove any transfer encoding at this point.
                      */
                     InputStream in = part.getBody().getInputStream();
-                    return readToString(in, charset);
+                    try {
+                        String text = readToString(in, charset);
+
+                        // Replace the body with a TextBody that already contains the decoded text
+                        part.setBody(new TextBody(text));
+
+                        return text;
+                    } finally {
+                        try {
+                            in.close();
+                        } catch (IOException e) { /* Ignore */ }
+                    }
                 }
             }