首先说一下信息收件人这个类的继承关系
RecipientsEditor->EncapsulatedMTKRecipientEditTextView(这两个类都在mms目录下)
->MTKRecipientEditTextView(mediatek/frameworks-ext/ex/chips/src/com/android/ex/chips/)
->MultiAutoCompleteTextView->AutoCompleteTextView->EditText(frameworks/base/core/java/android/widget)
然后我们想要修改这个输入框的样式，包括里面的文字颜色、背景等。这个我们可以在MTKRecipientEditTextView 中进行设定，关键代码如下
private Bitmap createUnselectedChip(RecipientEntry contact, TextPaint paint, boolean leaveBlankIconSpacer) { // Ellipsize the text so that it takes AT MOST the entire width of the // autocomplete text entry area. Make sure to leave space for padding // on the sides. int height = (int) mChipHeight; int iconWidth = height; float[] widths = new float[1]; paint.getTextWidths(" ", widths); /// M: Limit ellipsizedText in some case (ex. moreChip) CharSequence ellipsizedText = ellipsizeText(createChipDisplayText(contact), paint, (mLimitedWidthForSpan == -1) ? (calculateAvailableWidth() - iconWidth - widths[0]) : (mLimitedWidthForSpan - iconWidth - widths[0])); printDebugLog(TAG,"[createUnselectedChip] start, " + ellipsizedText + ", ID: " + contact.getContactId()); // Make sure there is a minimum chip width so the user can ALWAYS // tap a chip without difficulty. /// M: Only leave space if icon exists. @{ boolean hasIcon = false; int ellipsizedTextWidth = (int) Math.floor(paint.measureText(ellipsizedText, 0, ellipsizedText.length())); int width = ellipsizedTextWidth + (mChipPadding * 2); /// @} // Create the background of the chip. Bitmap tmpBitmap = null; Drawable background = getChipBackground(contact); if (background != null) { Canvas canvas = null; /// M: Only leave space if icon exists Bitmap photo = null; Matrix matrix = null; // Don't draw photos for recipients that have been typed in OR generated on the fly. long contactId = contact.getContactId(); boolean drawPhotos = isPhoneQuery() ? contactId != RecipientEntry.INVALID_CONTACT : (contactId != RecipientEntry.INVALID_CONTACT && (contactId != RecipientEntry.GENERATED_CONTACT && !TextUtils.isEmpty(contact.getDisplayName()))); if (drawPhotos) { byte[] photoBytes = contact.getPhotoBytes(); // There may not be a photo yet if anything but the first contact address // was selected. Trace.traceBegin(Trace.TRACE_TAG_VIEW, "getPhoto " + contact.getContactId()); if (photoBytes == null && contact.getPhotoThumbnailUri() != null) { // TODO: cache this in the recipient entry? ((BaseRecipientAdapter) getAdapter()).fetchPhoto(contact, contact .getPhotoThumbnailUri()); photoBytes = contact.getPhotoBytes(); } Trace.traceEnd(Trace.TRACE_TAG_VIEW); Trace.traceBegin(Trace.TRACE_TAG_VIEW, "decodePhoto"); if (photoBytes != null) { /* Vanzo:zhangshuli on: Thu, 12 Mar 2015 11:48:23 +0000 photo = BitmapFactory.decodeByteArray(photoBytes, 0, photoBytes.length); */ // End of Vanzo: zhangshuli } else { // TODO: can the scaled down default photo be cached? /* Vanzo:zhangshuli on: Thu, 12 Mar 2015 11:48:28 +0000 photo = mDefaultContactPhoto; */ // End of Vanzo: zhangshuli } Trace.traceEnd(Trace.TRACE_TAG_VIEW); // Draw the photo on the left side. if (photo != null) { /// M: Only leave space if icon exists. @{ hasIcon = true; width = ellipsizedTextWidth + (mChipPadding * 2) + iconWidth; /// @} RectF src = new RectF(0, 0, photo.getWidth(), photo.getHeight()); Rect backgroundPadding = new Rect(); mChipBackground.getPadding(backgroundPadding); RectF dst = new RectF(width - iconWidth + backgroundPadding.left, 0 + backgroundPadding.top, width - backgroundPadding.right, height - backgroundPadding.bottom); matrix = new Matrix(); matrix.setRectToRect(src, dst, Matrix.ScaleToFit.FILL); } } else if (!leaveBlankIconSpacer || isPhoneQuery()) { iconWidth = 0; } tmpBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); canvas = new Canvas(tmpBitmap); background.setBounds(0, 0, width, height); background.draw(canvas); if (photo != null && matrix != null) { canvas.drawBitmap(photo, matrix, paint); } /* Vanzo:shangxiaopeng on: Wed, 28 May 2014 11:03:56 +0800 * modify settings fun paint.setColor(getContext().getResources().getColor(android.R.color.black)); */ paint.setColor(getContext().getResources().getColor(android.R.color.white)); // End of Vanzo: shangxiaopeng // Vertically center the text in the chip. int xPositionOfText = hasIcon ? mChipPadding : (mChipPadding + (width - mChipPadding*2 - ellipsizedTextWidth)/2); /// M: Horizontally center the text in the chip canvas.drawText(ellipsizedText, 0, ellipsizedText.length(), xPositionOfText, getTextYOffset((String)ellipsizedText, paint, height), paint); } else { Log.w(TAG, "Unable to draw a background for the chips as it was never set"); } if (tmpBitmap == null) { tmpBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); } printDebugLog(TAG,"[createUnselectedChip] end"); return tmpBitmap; }
但是，如果我们想要更改下拉框的布局，你会发现，无论你怎么在mediatek下修改都是没有效果的。后来发现要在它的父类中进行修改 AutoCompleteTextView
代码如下
public void showDropDown() { buildImeCompletions(); if (mPopup.getAnchorView() == null) { if (mDropDownAnchorId != View.NO_ID) { mPopup.setAnchorView(getRootView().findViewById(mDropDownAnchorId)); } else { mPopup.setAnchorView(this); } } if (!isPopupShowing()) { // Make sure the list does not obscure the IME when shown for the first time. mPopup.setInputMethodMode(ListPopupWindow.INPUT_METHOD_NEEDED); mPopup.setListItemExpandMax(EXPAND_MAX); } mPopup.show(); mPopup.getListView().setOverScrollMode(View.OVER_SCROLL_ALWAYS); /* Vanzo:zhangshuli on: Wed, 11 Mar 2015 20:27:52 +0000 */ mPopup.getListView().setPadding(0, 0, mPopupMargnRight, 0); if (mPopupMargnRight != 0){ mPopup.getListView().setScrollBarStyle(ScrollView.SCROLLBARS_OUTSIDE_OVERLAY); } // End of Vanzo: zhangshuli }
这个代码是修改下拉框滚动条样式跟listview中item的边距
这里面用到了关于添加自定义属性的方法，参照另一篇文章