android.widget.TextView#getTypeface ( )源码实例Demo

public StepTab(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    LayoutInflater.from(getContext()).inflate(R.layout.ms_step_tab, this, true);

    mSelectedColor = ContextCompat.getColor(context, R.color.ms_selectedColor);
    mUnselectedColor = ContextCompat.getColor(context, R.color.ms_unselectedColor);
    mErrorColor = ContextCompat.getColor(context, R.color.ms_errorColor);

    mStepNumberTextView = (TextView) findViewById(R.id.ms_stepNumber);
    mStepDoneIndicator = (ImageView) findViewById(R.id.ms_stepDoneIndicator);
    mStepIconBackground = (ImageView) findViewById(R.id.ms_stepIconBackground);
    mStepDivider = findViewById(R.id.ms_stepDivider);
    mStepTitleTextView = (TextView) findViewById(R.id.ms_stepTitle);
    mStepSubtitleTextView = (TextView) findViewById(R.id.ms_stepSubtitle);

    mTitleColor = mStepTitleTextView.getCurrentTextColor();
    mSubtitleColor = mStepSubtitleTextView.getCurrentTextColor();

    Typeface typeface = mStepTitleTextView.getTypeface();
    mNormalTypeface = Typeface.create(typeface, Typeface.NORMAL);
    mBoldTypeface = Typeface.create(typeface, Typeface.BOLD);
    Drawable avd = createCircleToWarningDrawable();
    mStepIconBackground.setImageDrawable(avd);
}
 

/**
 * <p>Replace the font of specified view and it's children with specified typeface</p>
 */
private void replaceFont(@NonNull View root, @NonNull Typeface typeface) {
    if (root == null || typeface == null) {
        return;
    }

    if (root instanceof TextView) { // If view is TextView or it's subclass, replace it's font
        TextView textView = (TextView)root;
        // Extract previous style of TextView
        int style = Typeface.NORMAL;
        if (textView.getTypeface() != null) {
            style = textView.getTypeface().getStyle();
        }
        textView.setTypeface(typeface, style);
    } else if (root instanceof ViewGroup) { // If view is ViewGroup, apply this method on it's child views
        ViewGroup viewGroup = (ViewGroup) root;
        for (int i = 0; i < viewGroup.getChildCount(); ++i) {
            replaceFont(viewGroup.getChildAt(i), typeface);
        }
    } // else return
}
 

/**
 * Static method for setting the typeface for the given View
 * The font file should be placed in assets folder in the directory of fonts.
 * Any view that has parent class of TextView can easily use this method.
 *
 * @param view     typeface view
 * @param fontName font name
 */
public static void setCustomFont(View view, String fontName) {
    if (view instanceof TextView) {
        Context context = view.getContext();
        Typeface font = getInstance(context).get(fontName);
        TextView textView = (TextView) view;
        if (textView.getTypeface() != font)
            textView.setTypeface(font);
    }
}
 

public static void applyFont(TextView textView) {
    if (textView.getTypeface() != null && textView.getTypeface().isBold()) {
        textView.setTypeface(getTypeface(textView.getContext(), FontStyle.BOLD));
    } else {
        textView.setTypeface(getTypeface(textView.getContext(), FontStyle.REGULAR));
    }
}
 

protected void supportTypeface(Context context, TextView view, AttributeSet attrs) {
  if (view == null) {
    return;
  }
  Typeface typeface = Typography.getTypeface(context, attrs, view instanceof Button ? R.attr.buttonStyle : 0, 0);
  typeface = typeface != null ? typeface : Typography.getDefaultTypeface(context);
  if (typeface != null && view.getTypeface() != typeface) {
    view.setTypeface(typeface);
  }
}
 

protected static float getFontDescent(TextView textView, Paint fontMeasurePaint) {
    if (fontMeasurePaint.getTextSize() != textView.getTextSize()) {
        fontMeasurePaint.setTextSize(textView.getTextSize());
    }
    if (fontMeasurePaint.getTypeface() != textView.getTypeface()) {
        fontMeasurePaint.setTypeface(textView.getTypeface());
    }
    return fontMeasurePaint.descent();
}
 

/**
 * Apply typeface to single view
 *
 * @param view      to typeface typeface
 * @param typefaceCollection typeface collection
 */
private static void applyForView(View view, TypefaceCollection typefaceCollection) {

	if (view instanceof TextView) {
		TextView textView = (TextView) view;
		Typeface oldTypeface = textView.getTypeface();
		final int style = oldTypeface == null ? Typeface.NORMAL : oldTypeface.getStyle();
		textView.setTypeface(typefaceCollection.getTypeface(style));
		textView.setPaintFlags(textView.getPaintFlags() | Paint.SUBPIXEL_TEXT_FLAG);
	}
}
 

Builder(int id, @Nullable ViewHierarchyElementAndroid parent, View fromView) {
  // Bookkeeping
  this.id = id;
  this.parentId = (parent != null) ? parent.getId() : null;

  this.drawingOrder = null;

  // API 16+ properties
  this.scrollable = AT_16 ? fromView.isScrollContainer() : null;

  // API 11+ properties
  this.backgroundDrawableColor =
      (AT_11 && (fromView != null) && (fromView.getBackground() instanceof ColorDrawable))
          ? ((ColorDrawable) fromView.getBackground()).getColor()
          : null;

  // Base properties
  this.visibleToUser = ViewAccessibilityUtils.isVisibleToUser(fromView);
  this.className = fromView.getClass().getName();
  this.accessibilityClassName = null;
  this.packageName = fromView.getContext().getPackageName();
  this.resourceName =
      (fromView.getId() != View.NO_ID)
          ? ViewAccessibilityUtils.getResourceNameForView(fromView)
          : null;
  this.contentDescription = SpannableStringAndroid.valueOf(fromView.getContentDescription());
  this.enabled = fromView.isEnabled();
  if (fromView instanceof TextView) {
    TextView textView = (TextView) fromView;
    // Hint text takes precedence if no text is present.
    CharSequence text = textView.getText();
    if (TextUtils.isEmpty(text)) {
      text = textView.getHint();
    }
    this.text = SpannableStringAndroid.valueOf(text);
    this.textSize = textView.getTextSize();

    this.textColor = textView.getCurrentTextColor();
    this.typefaceStyle =
        (textView.getTypeface() != null) ? textView.getTypeface().getStyle() : null;
  } else {
    this.text = null;
    this.textSize = null;
    this.textColor = null;
    this.typefaceStyle = null;
  }

  this.importantForAccessibility = ViewAccessibilityUtils.isImportantForAccessibility(fromView);
  this.clickable = fromView.isClickable();
  this.longClickable = fromView.isLongClickable();
  this.focusable = fromView.isFocusable();
  this.editable = ViewAccessibilityUtils.isViewEditable(fromView);
  this.canScrollForward =
      (ViewCompat.canScrollVertically(fromView, 1)
          || ViewCompat.canScrollHorizontally(fromView, 1));
  this.canScrollBackward =
      (ViewCompat.canScrollVertically(fromView, -1)
          || ViewCompat.canScrollHorizontally(fromView, -1));
  this.checkable = (fromView instanceof Checkable);
  this.checked = (fromView instanceof Checkable) ? ((Checkable) fromView).isChecked() : null;
  this.hasTouchDelegate = (fromView.getTouchDelegate() != null);
  this.touchDelegateBounds = ImmutableList.of(); // Unavailable from the View API
  this.boundsInScreen = getBoundsInScreen(fromView);
  this.nonclippedHeight = fromView.getHeight();
  this.nonclippedWidth = fromView.getWidth();
  this.actionList = ImmutableList.of(); // Unavailable from the View API
}
 

@Override
public void populateView(View view, Cursor cursor, BaseExpandableListAdapter adapter, int flags)
{
    long now = System.currentTimeMillis();
    int position = cursor.getPosition();

    // set list title
    String groupTitle = getTitle(cursor, view.getContext());
    TextView title = (TextView) view.findViewById(android.R.id.title);
    if (title != null)
    {
        title.setText(groupTitle);

    }
    // set search time
    TextView text1 = (TextView) view.findViewById(android.R.id.text1);
    if (text1 != null)
    {
        text1.setText(DateUtils.getRelativeTimeSpanString(
                cursor.getLong(cursor.getColumnIndex(SearchHistoryDatabaseHelper.SearchHistoryColumns.TIMESTAMP)), now, DateUtils.MINUTE_IN_MILLIS));
    }

    // set list elements
    TextView text2 = (TextView) view.findViewById(android.R.id.text2);
    int childrenCount = adapter.getChildrenCount(position);
    if (text2 != null && ((ExpandableGroupDescriptorAdapter) adapter).childCursorLoaded(position))
    {
        Resources res = view.getContext().getResources();

        text2.setText(res.getQuantityString(R.plurals.number_of_tasks, childrenCount, childrenCount));
    }

    // show/hide divider
    View divider = view.findViewById(R.id.divider);
    if (divider != null)
    {
        divider.setVisibility((flags & FLAG_IS_EXPANDED) != 0 && childrenCount > 0 ? View.VISIBLE : View.GONE);
    }

    View colorbar1 = view.findViewById(R.id.colorbar1);
    View colorbar2 = view.findViewById(R.id.colorbar2);

    if (colorbar1 != null)
    {
        colorbar1.setVisibility(View.GONE);
    }
    if (colorbar2 != null)
    {
        colorbar2.setVisibility(View.GONE);
    }

    View removeSearch = view.findViewById(R.id.quick_add_task);
    if (removeSearch != null)
    {
        ((ImageView) removeSearch).setImageResource(R.drawable.content_remove);
        removeSearch.setOnClickListener(removeListener);
        GroupTag tag = (GroupTag) removeSearch.getTag();
        Long groupId = cursor.getLong(cursor.getColumnIndex(SearchHistoryColumns._ID));
        if (tag == null || tag.groupId != groupId)
        {
            removeSearch.setTag(new GroupTag(groupTitle, groupId));
        }
    }

    if ((flags & FLAG_IS_EXPANDED) != 0)
    {
        if (removeSearch != null)
        {
            removeSearch.setVisibility(View.VISIBLE);
        }
        if (text2 != null)
        {
            text2.setVisibility(View.GONE);
        }
    }
    else
    {
        if (removeSearch != null)
        {
            removeSearch.setVisibility(View.GONE);
        }
        if (text2 != null)
        {
            text2.setVisibility(View.VISIBLE);
        }
    }

    // TODO: swap styles instead of modifying the font style
    boolean isHistoric = cursor.getInt(cursor.getColumnIndex(SearchHistoryColumns.HISTORIC)) > 0;
    Typeface oldtypeface = title.getTypeface();
    title.setTypeface(oldtypeface, swapStyle(isHistoric, oldtypeface));

    // set history icon
    ImageView icon = (ImageView) view.findViewById(android.R.id.icon);
    icon.setImageResource(R.drawable.ic_history);
    icon.setVisibility(isHistoric ? View.VISIBLE : View.INVISIBLE);
}