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

public TinyCoach(Application context, FPSConfig config) {

        fpsConfig = config;

        //create meter view
        meterView = (TextView) LayoutInflater.from(context).inflate(R.layout.meter_view, null);

        //set initial fps value....might change...
        meterView.setText((int) fpsConfig.refreshRate + "");

        // grab window manager and add view to the window
        windowManager = (WindowManager) meterView.getContext().getSystemService(Service.WINDOW_SERVICE);

        int minWidth = meterView.getLineHeight()
                + meterView.getTotalPaddingTop()
                + meterView.getTotalPaddingBottom()
                + (int) meterView.getPaint().getFontMetrics().bottom;
        meterView.setMinWidth(minWidth);

        addViewToWindow(meterView);
    }
 

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);
    }
}
 

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;
}
 

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());
    }
}
 

/**
 * 改变外框大小，适应文字
 * 如果当前文字只有一行，则缩到外框适应文字大小
 * 如果文字有多行，则宽度不变，缩小高度到适应文字大小
 * 文字外框的位置不变
 *
 * @param view
 */
@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
public static void adjustSize(TextView view) {
    if (view != null && view.getLayoutParams() != null) {
        /*
        //更好的实现方式，但是ios那边不支持这种方式
        ViewGroup.LayoutParams layoutParams = view.getLayoutParams();
        layoutParams.width = ViewGroup.LayoutParams.WRAP_CONTENT;
        layoutParams.height = ViewGroup.LayoutParams.WRAP_CONTENT;
        view.setLayoutParams(layoutParams);*/

        // 废弃的实现方式，使用WRAP_CONTENT最简单，且这种方式算出来的width有bug
        // @Deprecated
        /*int lineCount = Math.min(view.getLineCount(), getMaxLines(view));
        int width, height;
        if (lineCount > 1) {//多行，宽度不变，改变高度
            width = view.getWidth();
            height = view.getLineHeight() * lineCount + view.getPaddingTop() + view.getPaddingBottom();
        } else {//一行，改变宽度&高度
             Paint paint = view.getPaint();
            width = (int) paint.measureText(view.getText().toString()) + view.getPaddingLeft() + view.getPaddingRight();
            height = view.getLineHeight() + view.getPaddingTop() + view.getPaddingBottom();
        }*/

        int lineCount = Math.min(view.getLineCount(), getMaxLines(view));
        float width, height;
        if (lineCount > 1) {//多行，宽度不变，改变高度
            width = view.getWidth();
            height = view.getLineHeight() * lineCount + view.getPaddingTop() + view.getPaddingBottom();
        } else {//一行，改变宽度&高度
            width = view.getPaddingLeft() + Layout.getDesiredWidth(view.getText(), view.getPaint()) + view.getPaddingRight();
            height = view.getLineHeight() + view.getPaddingTop() + view.getPaddingBottom();
        }

        if (view.getLayoutParams() != null) {
            ViewGroup.LayoutParams layoutParams = view.getLayoutParams();
            layoutParams.width = (int) width;
            layoutParams.height = (int) height;
            view.setLayoutParams(layoutParams);
        }
    }
}
 

/**
 * 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;
}