public class MessageHeader extends LinearLayout implements OnClickListener, OnLongClickListener {
private Context mContext;
private TextView mFromView;
private TextView mSenderView;
private TextView mDateView;
private TextView mToView;
private TextView mToLabel;
private TextView mCcView;
private TextView mCcLabel;
private TextView mBccView;
private TextView mBccLabel;
private TextView mSubjectView;
private MessageCryptoStatusView mCryptoStatusIcon;
private View mChip;
private CheckBox mFlagged;
private int defaultSubjectColor;
private TextView mAdditionalHeadersView;
private View mAnsweredIcon;
private View mForwardedIcon;
private Message mMessage;
private Account mAccount;
private FontSizes mFontSizes = K9.getFontSizes();
private Contacts mContacts;
private SavedState mSavedState;
private MessageHelper mMessageHelper;
private ContactPictureLoader mContactsPictureLoader;
private ContactBadge mContactBadge;
private OnLayoutChangedListener mOnLayoutChangedListener;
private OnCryptoClickListener onCryptoClickListener;
/**
* Pair class is only available since API Level 5, so we need
* this helper class unfortunately
*/
private static class HeaderEntry {
public String label;
public String value;
public HeaderEntry(String label, String value) {
this.label = label;
this.value = value;
}
}
public MessageHeader(Context context, AttributeSet attrs) {
super(context, attrs);
mContext = context;
mContacts = Contacts.getInstance(mContext);
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
mAnsweredIcon = findViewById(R.id.answered);
mForwardedIcon = findViewById(R.id.forwarded);
mFromView = (TextView) findViewById(R.id.from);
mSenderView = (TextView) findViewById(R.id.sender);
mToView = (TextView) findViewById(R.id.to);
mToLabel = (TextView) findViewById(R.id.to_label);
mCcView = (TextView) findViewById(R.id.cc);
mCcLabel = (TextView) findViewById(R.id.cc_label);
mBccView = (TextView) findViewById(R.id.bcc);
mBccLabel = (TextView) findViewById(R.id.bcc_label);
mContactBadge = (ContactBadge) findViewById(R.id.contact_badge);
mSubjectView = (TextView) findViewById(R.id.subject);
mAdditionalHeadersView = (TextView) findViewById(R.id.additional_headers_view);
mChip = findViewById(R.id.chip);
mDateView = (TextView) findViewById(R.id.date);
mFlagged = (CheckBox) findViewById(R.id.flagged);
defaultSubjectColor = mSubjectView.getCurrentTextColor();
mFontSizes.setViewTextSize(mSubjectView, mFontSizes.getMessageViewSubject());
mFontSizes.setViewTextSize(mDateView, mFontSizes.getMessageViewDate());
mFontSizes.setViewTextSize(mAdditionalHeadersView, mFontSizes.getMessageViewAdditionalHeaders());
mFontSizes.setViewTextSize(mFromView, mFontSizes.getMessageViewSender());
mFontSizes.setViewTextSize(mToView, mFontSizes.getMessageViewTo());
mFontSizes.setViewTextSize(mToLabel, mFontSizes.getMessageViewTo());
mFontSizes.setViewTextSize(mCcView, mFontSizes.getMessageViewCC());
mFontSizes.setViewTextSize(mCcLabel, mFontSizes.getMessageViewCC());
mFontSizes.setViewTextSize(mBccView, mFontSizes.getMessageViewBCC());
mFontSizes.setViewTextSize(mBccLabel, mFontSizes.getMessageViewBCC());
mFromView.setOnClickListener(this);
mToView.setOnClickListener(this);
mCcView.setOnClickListener(this);
mBccView.setOnClickListener(this);
mFromView.setOnLongClickListener(this);
mToView.setOnLongClickListener(this);
mCcView.setOnLongClickListener(this);
mBccView.setOnLongClickListener(this);
mCryptoStatusIcon = (MessageCryptoStatusView) findViewById(R.id.crypto_status_icon);
mCryptoStatusIcon.setOnClickListener(this);
mMessageHelper = MessageHelper.getInstance(mContext);
hideAdditionalHeaders();
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.from: {
onAddSenderToContacts();
break;
}
case R.id.to:
case R.id.cc:
case R.id.bcc: {
expand((TextView)view, ((TextView)view).getEllipsize() != null);
layoutChanged();
break;
}
case R.id.crypto_status_icon: {
onCryptoClickListener.onCryptoClick();
break;
}
}
}
@Override
public boolean onLongClick(View view) {
switch (view.getId()) {
case R.id.from:
onAddAddressesToClipboard(mMessage.getFrom());
break;
case R.id.to:
onAddRecipientsToClipboard(Message.RecipientType.TO);
break;
case R.id.cc:
onAddRecipientsToClipboard(Message.RecipientType.CC);
break;
}
return true;
}
private void onAddSenderToContacts() {
if (mMessage != null) {
try {
final Address senderEmail = mMessage.getFrom()[0];
mContacts.createContact(senderEmail);
} catch (Exception e) {
Timber.e(e, "Couldn't create contact");
}
}
}
public String createMessage(int addressesCount) {
return mContext.getResources().getQuantityString(R.plurals.copy_address_to_clipboard, addressesCount);
}
private void onAddAddressesToClipboard(Address[] addresses) {
String addressList = Address.toString(addresses);
ClipboardManager clipboardManager = ClipboardManager.getInstance(mContext);
clipboardManager.setText("addresses", addressList);
Toast.makeText(mContext, createMessage(addresses.length), Toast.LENGTH_LONG).show();
}
private void onAddRecipientsToClipboard(Message.RecipientType recipientType) {
onAddAddressesToClipboard(mMessage.getRecipients(recipientType));
}
public void setOnFlagListener(OnClickListener listener) {
mFlagged.setOnClickListener(listener);
}
public boolean additionalHeadersVisible() {
return (mAdditionalHeadersView != null &&
mAdditionalHeadersView.getVisibility() == View.VISIBLE);
}
/**
* Clear the text field for the additional headers display if they are
* not shown, to save UI resources.
*/
private void hideAdditionalHeaders() {
mAdditionalHeadersView.setVisibility(View.GONE);
mAdditionalHeadersView.setText("");
}
/**
* Set up and then show the additional headers view. Called by
* {@link #onShowAdditionalHeaders()}
* (when switching between messages).
*/
private void showAdditionalHeaders() {
Integer messageToShow = null;
try {
// Retrieve additional headers
List<HeaderEntry> additionalHeaders = getAdditionalHeaders(mMessage);
if (!additionalHeaders.isEmpty()) {
// Show the additional headers that we have got.
populateAdditionalHeadersView(additionalHeaders);
mAdditionalHeadersView.setVisibility(View.VISIBLE);
} else {
// All headers have been downloaded, but there are no additional headers.
messageToShow = R.string.message_no_additional_headers_available;
}
} catch (Exception e) {
messageToShow = R.string.message_additional_headers_retrieval_failed;
}
// Show a message to the user, if any
if (messageToShow != null) {
Toast toast = Toast.makeText(mContext, messageToShow, Toast.LENGTH_LONG);
toast.setGravity(Gravity.CENTER_VERTICAL | Gravity.CENTER_HORIZONTAL, 0, 0);
toast.show();
}
}
public void populate(final Message message, final Account account) {
final Contacts contacts = K9.showContactName() ? mContacts : null;
final CharSequence from = MessageHelper.toFriendly(message.getFrom(), contacts);
final CharSequence to = MessageHelper.toFriendly(message.getRecipients(Message.RecipientType.TO), contacts);
final CharSequence cc = MessageHelper.toFriendly(message.getRecipients(Message.RecipientType.CC), contacts);
final CharSequence bcc = MessageHelper.toFriendly(message.getRecipients(Message.RecipientType.BCC), contacts);
Address[] fromAddrs = message.getFrom();
Address[] toAddrs = message.getRecipients(Message.RecipientType.TO);
Address[] ccAddrs = message.getRecipients(Message.RecipientType.CC);
boolean fromMe = mMessageHelper.toMe(account, fromAddrs);
Address counterpartyAddress = null;
if (fromMe) {
if (toAddrs.length > 0) {
counterpartyAddress = toAddrs[0];
} else if (ccAddrs.length > 0) {
counterpartyAddress = ccAddrs[0];
}
} else if (fromAddrs.length > 0) {
counterpartyAddress = fromAddrs[0];
}
/* We hide the subject by default for each new message, and MessageTitleView might show
* it later by calling showSubjectLine(). */
boolean newMessageShown = mMessage == null || !mMessage.getUid().equals(message.getUid());
if (newMessageShown) {
mSubjectView.setVisibility(GONE);
}
mMessage = message;
mAccount = account;
if (K9.showContactPicture()) {
mContactBadge.setVisibility(View.VISIBLE);
mContactsPictureLoader = ContactPicture.getContactPictureLoader(mContext);
} else {
mContactBadge.setVisibility(View.GONE);
}
if (shouldShowSender(message)) {
mSenderView.setVisibility(VISIBLE);
String sender = getResources().getString(R.string.message_view_sender_label,
MessageHelper.toFriendly(message.getSender(), contacts));
mSenderView.setText(sender);
} else {
mSenderView.setVisibility(View.GONE);
}
final String subject = message.getSubject();
if (TextUtils.isEmpty(subject)) {
mSubjectView.setText(mContext.getText(R.string.general_no_subject));
} else {
mSubjectView.setText(subject);
}
mSubjectView.setTextColor(0xff000000 | defaultSubjectColor);
String dateTime = DateUtils.formatDateTime(mContext,
message.getSentDate().getTime(),
DateUtils.FORMAT_SHOW_DATE
| DateUtils.FORMAT_ABBREV_ALL
| DateUtils.FORMAT_SHOW_TIME
| DateUtils.FORMAT_SHOW_YEAR);
mDateView.setText(dateTime);
if (K9.showContactPicture()) {
if (counterpartyAddress != null) {
Utility.setContactForBadge(mContactBadge, counterpartyAddress);
mContactsPictureLoader.loadContactPicture(counterpartyAddress, mContactBadge);
} else {
mContactBadge.setImageResource(R.drawable.ic_contact_picture);
}
}
mFromView.setText(from);
updateAddressField(mToView, to, mToLabel);
updateAddressField(mCcView, cc, mCcLabel);
updateAddressField(mBccView, bcc, mBccLabel);
mAnsweredIcon.setVisibility(message.isSet(Flag.ANSWERED) ? View.VISIBLE : View.GONE);
mForwardedIcon.setVisibility(message.isSet(Flag.FORWARDED) ? View.VISIBLE : View.GONE);
mFlagged.setChecked(message.isSet(Flag.FLAGGED));
mChip.setBackgroundColor(mAccount.getChipColor());
setVisibility(View.VISIBLE);
if (mSavedState != null) {
if (mSavedState.additionalHeadersVisible) {
showAdditionalHeaders();
}
mSavedState = null;
} else {
hideAdditionalHeaders();
}
}
public static boolean shouldShowSender(Message message) {
Address[] from = message.getFrom();
Address[] sender = message.getSender();
if (sender == null || sender.length == 0) {
return false;
}
return !Arrays.equals(from, sender);
}
public void hideCryptoStatus() {
mCryptoStatusIcon.setVisibility(View.GONE);
}
public void setCryptoStatusLoading() {
mCryptoStatusIcon.setVisibility(View.VISIBLE);
mCryptoStatusIcon.setEnabled(false);
mCryptoStatusIcon.setCryptoDisplayStatus(MessageCryptoDisplayStatus.LOADING);
}
public void setCryptoStatusDisabled() {
mCryptoStatusIcon.setVisibility(View.VISIBLE);
mCryptoStatusIcon.setEnabled(false);
mCryptoStatusIcon.setCryptoDisplayStatus(MessageCryptoDisplayStatus.DISABLED);
}
public void setCryptoStatus(MessageCryptoDisplayStatus displayStatus) {
mCryptoStatusIcon.setVisibility(View.VISIBLE);
mCryptoStatusIcon.setEnabled(true);
mCryptoStatusIcon.setCryptoDisplayStatus(displayStatus);
}
public void onShowAdditionalHeaders() {
int currentVisibility = mAdditionalHeadersView.getVisibility();
if (currentVisibility == View.VISIBLE) {
hideAdditionalHeaders();
expand(mToView, false);
expand(mCcView, false);
} else {
showAdditionalHeaders();
expand(mToView, true);
expand(mCcView, true);
}
layoutChanged();
}
private void updateAddressField(TextView v, CharSequence text, View label) {
boolean hasText = !TextUtils.isEmpty(text);
v.setText(text);
v.setVisibility(hasText ? View.VISIBLE : View.GONE);
label.setVisibility(hasText ? View.VISIBLE : View.GONE);
}
/**
* Expand or collapse a TextView by removing or adding the 2 lines limitation
*/
private void expand(TextView v, boolean expand) {
if (expand) {
v.setMaxLines(Integer.MAX_VALUE);
v.setEllipsize(null);
} else {
v.setMaxLines(2);
v.setEllipsize(android.text.TextUtils.TruncateAt.END);
}
}
private List<HeaderEntry> getAdditionalHeaders(final Message message)
throws MessagingException {
List<HeaderEntry> additionalHeaders = new LinkedList<HeaderEntry>();
Set<String> headerNames = new LinkedHashSet<String>(message.getHeaderNames());
for (String headerName : headerNames) {
String[] headerValues = message.getHeader(headerName);
for (String headerValue : headerValues) {
additionalHeaders.add(new HeaderEntry(headerName, headerValue));
}
}
return additionalHeaders;
}
/**
* Set up the additional headers text view with the supplied header data.
*
* @param additionalHeaders List of header entries. Each entry consists of a header
* name and a header value. Header names may appear multiple
* times.
* <p/>
* This method is always called from within the UI thread by
* {@link #showAdditionalHeaders()}.
*/
private void populateAdditionalHeadersView(final List<HeaderEntry> additionalHeaders) {
SpannableStringBuilder sb = new SpannableStringBuilder();
boolean first = true;
for (HeaderEntry additionalHeader : additionalHeaders) {
if (!first) {
sb.append("\n");
} else {
first = false;
}
StyleSpan boldSpan = new StyleSpan(Typeface.BOLD);
SpannableString label = new SpannableString(additionalHeader.label + ": ");
label.setSpan(boldSpan, 0, label.length(), 0);
sb.append(label);
sb.append(MimeUtility.unfoldAndDecode(additionalHeader.value));
}
mAdditionalHeadersView.setText(sb);
}
@Override
public Parcelable onSaveInstanceState() {
Parcelable superState = super.onSaveInstanceState();
SavedState savedState = new SavedState(superState);
savedState.additionalHeadersVisible = additionalHeadersVisible();
return savedState;
}
@Override
public void onRestoreInstanceState(Parcelable state) {
if(!(state instanceof SavedState)) {
super.onRestoreInstanceState(state);
return;
}
SavedState savedState = (SavedState)state;
super.onRestoreInstanceState(savedState.getSuperState());
mSavedState = savedState;
}
static class SavedState extends BaseSavedState {
boolean additionalHeadersVisible;
public static final Parcelable.Creator<SavedState> CREATOR =
new Parcelable.Creator<SavedState>() {
@Override
public SavedState createFromParcel(Parcel in) {
return new SavedState(in);
}
@Override
public SavedState[] newArray(int size) {
return new SavedState[size];
}
};
SavedState(Parcelable superState) {
super(superState);
}
private SavedState(Parcel in) {
super(in);
this.additionalHeadersVisible = (in.readInt() != 0);
}
@Override
public void writeToParcel(Parcel out, int flags) {
super.writeToParcel(out, flags);
out.writeInt((this.additionalHeadersVisible) ? 1 : 0);
}
}
public interface OnLayoutChangedListener {
void onLayoutChanged();
}
public void setOnLayoutChangedListener(OnLayoutChangedListener listener) {
mOnLayoutChangedListener = listener;
}
private void layoutChanged() {
if (mOnLayoutChangedListener != null) {
mOnLayoutChangedListener.onLayoutChanged();
}
}
public void showSubjectLine() {
mSubjectView.setVisibility(VISIBLE);
}
public void setOnCryptoClickListener(OnCryptoClickListener onCryptoClickListener) {
this.onCryptoClickListener = onCryptoClickListener;
}
}
然后下面直接是这样一个可重用控件的布局
<?xml version="1.0" encoding="utf-8"?>
<com.fsck.k9.view.MessageHeader
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/header_container"
android:layout_width="match_parent"
android:orientation="vertical"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<!-- Color chip -->
<View
android:id="@+id/chip"
android:layout_width="8dip"
android:layout_height="match_parent" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="@+id/subject"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ellipsize="end"
android:textStyle="bold"
android:textColor="?android:attr/textColorPrimary"
android:textAppearance="?android:attr/textAppearanceMedium"
android:padding="8dp"
android:visibility="gone"
tools:visibility="visible"
tools:text="(no subject)"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >
<com.fsck.k9.ui.ContactBadge
android:id="@+id/contact_badge"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_marginTop="8dp"
android:layout_marginLeft="8dp" />
<!-- State icons -->
<LinearLayout
android:id="@+id/icon_container"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dip"
android:layout_marginBottom="2dip"
android:layout_below="@+id/contact_badge"
android:layout_centerHorizontal="true"
android:orientation="vertical" >
<View
android:id="@+id/answered"
android:layout_width="32sp"
android:layout_height="32sp"
android:paddingRight="2dip"
android:background="@drawable/ic_email_answered_small" />
<View
android:id="@+id/forwarded"
android:layout_width="22sp"
android:layout_height="22sp"
android:paddingRight="4dip"
android:background="@drawable/ic_email_forwarded_small" />
</LinearLayout>
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="6dip"
android:layout_marginLeft="2dp" >
<!-- From -->
<TextView
android:id="@+id/from"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_toLeftOf="@+id/status_icon_strip"
android:layout_alignBottom="@+id/status_icon_strip"
android:paddingTop="0dp"
android:paddingRight="6dip"
android:singleLine="true"
android:ellipsize="end"
android:textColor="?android:attr/textColorPrimary"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textStyle="bold"
android:text="@string/general_no_sender"
android:gravity="center_vertical"
/>
<!-- Sender -->
<TextView
android:id="@+id/sender"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_toLeftOf="@+id/status_icon_strip"
android:paddingTop="0dp"
android:layout_below="@+id/from"
android:ellipsize="end"
android:textColor="?android:attr/textColorPrimary"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textStyle="bold"
android:visibility="gone"
android:gravity="center_vertical"
/>
<!-- To -->
<TextView
android:id="@+id/to_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignLeft="@+id/from"
android:layout_alignBaseline="@+id/to"
android:paddingTop="2dp"
android:paddingRight="4dp"
android:text="@string/message_to_label"
android:textColor="?android:attr/textColorPrimary"
android:textAppearance="@android:style/TextAppearance.Medium"
android:textStyle="bold" />
<TextView
android:id="@+id/to"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@+id/to_label"
android:layout_below="@+id/sender"
android:maxLines="2"
android:ellipsize="end"
android:paddingTop="2dp"
android:textColor="?android:attr/textColorSecondary"
android:textAppearance="@android:style/TextAppearance.Medium" />
<!-- CC -->
<TextView
android:id="@+id/cc_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/to_label"
android:layout_alignLeft="@+id/to_label"
android:layout_alignBaseline="@+id/cc"
android:paddingTop="2dp"
android:paddingRight="4dp"
android:text="@string/message_view_cc_label"
android:textColor="?android:attr/textColorPrimary"
android:textStyle="bold"
android:textAppearance="@android:style/TextAppearance.Medium" />
<TextView
android:id="@+id/cc"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@+id/cc_label"
android:layout_below="@+id/to"
android:maxLines="2"
android:ellipsize="end"
android:paddingTop="2dp"
android:textColor="?android:attr/textColorSecondary"
android:textAppearance="@android:style/TextAppearance.Medium" />
<!-- BCC -->
<TextView
android:id="@+id/bcc_label"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/cc_label"
android:layout_alignLeft="@+id/cc_label"
android:layout_alignBaseline="@+id/bcc"
android:paddingTop="2dp"
android:paddingRight="4dp"
android:text="@string/message_view_bcc_label"
android:textColor="?android:attr/textColorPrimary"
android:textStyle="bold"
android:textAppearance="@android:style/TextAppearance.Medium" />
<TextView
android:id="@+id/bcc"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="@+id/bcc_label"
android:layout_below="@+id/cc"
android:maxLines="2"
android:ellipsize="end"
android:paddingTop="2dp"
android:textColor="?android:attr/textColorSecondary"
android:textAppearance="@android:style/TextAppearance.Medium" />
<!-- Date -->
<TextView
android:id="@+id/date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/cc"
android:layout_alignParentRight="true"
android:paddingTop="8dp"
android:singleLine="true"
android:ellipsize="none"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="?android:attr/textColorSecondary" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:layout_centerVertical="true"
android:id="@+id/status_icon_strip"
>
<CheckBox
android:id="@+id/flagged"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:focusable="false"
style="?android:attr/starStyle"
android:checked="false" />
<include layout="@layout/message_crypto_status_view" />
</LinearLayout>
</RelativeLayout>
</LinearLayout>
<TextView
android:id="@+id/additional_headers_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="8dp"
android:layout_marginRight="6dip"
android:singleLine="false"
android:ellipsize="none"
android:textColor="?android:attr/textColorSecondary"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textIsSelectable="true" />
</LinearLayout>
</LinearLayout>
<View
android:layout_height="1dip"
android:layout_width="match_parent"
android:layout_marginBottom="4dip"
android:background="@drawable/divider_horizontal_email" />
</com.fsck.k9.view.MessageHeader>
其中的技巧是，在onFinishInflate中去初始化子view。这种写自定义可重用的view的方式比较灵活。
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