Java Code Examples for android.widget.TextView#getLineCount()

private void adjustTextViewHeight() {
    View view = getView();
    if (view == null) {
        return;
    }

    TextSwitcher textSwitcher = (TextSwitcher) view;
    TextView curr = (TextView) textSwitcher.getCurrentView();
    TextView next = (TextView) textSwitcher.getNextView();
    int currH = curr.getLineCount() * curr.getLineHeight();
    int nextH = next.getLineCount() * next.getLineHeight();
    if (currH != nextH) {
        curr.setHeight(currH);
        next.setHeight(currH);
    }
}
 

private boolean expand() {
    if (!isCompact)
        return false;
    else {
        TextView subtitle = (TextView) layout.findViewById(R.id.notification_subtitle);
        if ( (subtitle.getLineCount() <= MIN_LINES && subtitle.length() < 80) && !isActionButtons) {
            return false;
        }
        isCompact = false;
        subtitle.setMaxLines(MAX_LINES);
        if (isActionButtons)
            themeClass.showActionButtons(layout, -1);
        if (displayTime < MAX_DISPLAY_TIME) {
            handler.removeCallbacks(closeTimer);
            handler.postDelayed(closeTimer, displayTime);
        }
        return true;
    }
}
 

public int getTopVisibleLine(TextView editor) {
    int lineHeight = editor.getLineHeight();
    if (lineHeight == 0) {
        return 0;
    }
    int line = editor.getScrollY() / lineHeight;
    if (line < 0) {
        return 0;
    }
    if (line >= editor.getLineCount()) {
        return editor.getLineCount() - 1;
    }
    return line;
}
 

public int getBottomVisibleLine(TextView editor) {
    int lineHeight = editor.getLineHeight();
    if (lineHeight == 0) {
        return 0;
    }
    int line = Math.abs((editor.getScrollY() + editor.getHeight()) / lineHeight) + 1;
    if (line < 0) {
        return 0;
    }
    if (line >= editor.getLineCount()) {
        return editor.getLineCount() - 1;
    }
    return line;
}
 

private void configureViewForPosition(View itemView, int position) {
    TextView dateText = (TextView) itemView.findViewById(R.id.push_date);
    TextView titleText = (TextView) itemView.findViewById(R.id.push_title);
    TextView descriptionText = (TextView) itemView.findViewById(R.id.push_description);
    ImageView iconImage = (ImageView) itemView.findViewById(R.id.push_icon_image);

    String title = entries.get(position).getTitle();
    if (title.equals(""))
        title = entries.get(position).getService().getName();
    String description = entries.get(position).getMessage();
    Date pushDate = entries.get(position).getLocalTimestamp();
    Bitmap icon = entries.get(position).getService().getIconBitmapOrDefault(context);

    dateText.setText(this.dateFormat.format(pushDate));
    titleText.setText(title);
    descriptionText.setText(description);
    iconImage.setImageBitmap(icon);

    TypedValue value = new TypedValue();
    DisplayMetrics metrics = new DisplayMetrics();

    context.getTheme().resolveAttribute(android.R.attr.listPreferredItemHeight, value, true);
    ((WindowManager) (context.getSystemService(Context.WINDOW_SERVICE))).getDefaultDisplay().getMetrics(metrics);

    int lineCount = selectedIndex == position ? descriptionText.getLineCount() : 0;
    int minHeight = (int) TypedValue.complexToDimension(value.data, metrics);
    int prefHeight = (lineCount + 2) * descriptionText.getLineHeight();
    itemView.getLayoutParams().height = prefHeight > minHeight ? prefHeight : minHeight;
}
 

/**
 * 获取文本实际所占高度，辅助用于计算行高,行数
 *
 * @param text        文本
 * @param textSize    字体大小
 * @param deviceWidth 屏幕宽度
 */
private void measureTextViewHeight(String text, float textSize, int deviceWidth) {
    TextView textView = new TextView(getContext());
    textView.setText(text);
    textView.setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize);
    int widthMeasureSpec = MeasureSpec.makeMeasureSpec(deviceWidth, MeasureSpec.EXACTLY);
    int heightMeasureSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
    textView.measure(widthMeasureSpec, heightMeasureSpec);
    originalLineCount = textView.getLineCount();
    originalHeight = textView.getMeasuredHeight();
}
 

private void addText(TextView textView, String content) {
    textView.append(content);
    textView.append("\n");
    int offset = textView.getLineCount() * textView.getLineHeight();
    if (offset > textView.getHeight()) {
        textView.scrollTo(0, offset - textView.getHeight());
    }
}
 

/**
 * Returns a {@link Runnable} that sets up toggleable scrolling behavior on a {@link TextView}
 * if the number of lines to be displayed exceeds the maximum lines limit supported by the TextView.
 * Can be applied by using {@link View#post(Runnable)}.
 *
 * @param textView TextView that the Runnable should apply against
 * @return Runnable
 */
public static Runnable getMarqueeToggleableAction(final TextView textView) {
    return new Runnable() {
        @Override
        public void run() {
            int lines = textView.getLineCount();
            int maxLines = TextViewCompat.getMaxLines(textView);
            if (lines > maxLines) {
                textView.setEllipsize(TextUtils.TruncateAt.END);
                textView.setClickable(true);
                textView.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        v.setSelected(!v.isSelected());
                        TextUtils.TruncateAt ellipsize;
                        if (v.isSelected()) {
                            ellipsize = TextUtils.TruncateAt.MARQUEE;
                        } else {
                            ellipsize = TextUtils.TruncateAt.END;
                        }
                        textView.setEllipsize(ellipsize);
                        textView.setHorizontallyScrolling(v.isSelected());
                    }
                });
            }
        }
    };
}
 

/**
 * 获取文本实际所占高度，辅助用于计算行高,行数
 *
 * @param text        文本
 * @param textSize    字体大小
 * @param deviceWidth 屏幕宽度
 */
private void measureTextViewHeight(String text, float textSize, int deviceWidth) {
    TextView textView = new TextView(getContext());
    textView.setText(text);
    textView.setTextSize(TypedValue.COMPLEX_UNIT_PX, textSize);
    int widthMeasureSpec = MeasureSpec.makeMeasureSpec(deviceWidth, MeasureSpec.EXACTLY);
    int heightMeasureSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
    textView.measure(widthMeasureSpec, heightMeasureSpec);
    originalLineCount = textView.getLineCount();
    originalHeight = textView.getMeasuredHeight();
}
 

/**
 * Returns the standard height (i.e. without text effects such as shadow) of all the text of
 * the given {@link TextView}.
 * @param textView The {@link TextView} to determine the height of all its text content.
 * @return The standard height of all the text content of the given {@link TextView}.
 */
private int heightOf(final TextView textView) {
    return textView.getLineCount() > 0 ? textView.getLineHeight() * textView.getLineCount() : 0;
}