android 实现LinearLayout布局内TextView横向排列，自动换行

/**********************************Activity里*************************************************/
/**
 * Activity窗口获得或失去焦点时被调用,在onResume之后或onPause之后
 *
 * @param hasFocus 窗口是否获取或失去焦点，true表示获取焦点，false表示失去焦点
 */
@Override
public void onWindowFocusChanged(boolean hasFocus) {
    super.onWindowFocusChanged(hasFocus);
    if (hasFocus && isFrist) {
        isFrist = false;

        // 获取Layout布局
        ViewGroup container = findViewById(R.id.ll_read);
        this._draw(container, readList);
    }
}

/**
 * 绘制TextView显示班级成员阅读情况
 *
 * @param container 容器
 * @param list      集合
 */
private void _draw(ViewGroup container, List list) {

    try {
        // 获取container的宽度
        final int containerWidth = container.getMeasuredWidth();
        final int containerHeight = container.getMeasuredHeight();
        final LayoutInflater inflater = getLayoutInflater();

        // 用来测量字符的宽度
        final Paint paint = new Paint();
        final TextView textView = (TextView) inflater.inflate(R.layout.activity_text, null);
        final int itemPadding = textView.getCompoundPaddingLeft() + textView.getCompoundPaddingRight();
        final LinearLayout.LayoutParams tvParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
                ViewGroup.LayoutParams.WRAP_CONTENT);
        tvParams.setMargins(0, 0, 0, 0);

        paint.setTextSize(textView.getTextSize());

        // 行layout
        LinearLayout layout = new LinearLayout(this);
        layout.setLayoutParams(new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
        layout.setOrientation(LinearLayout.HORIZONTAL);
        container.addView(layout);

        final LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT);
        params.setMargins(0, 0, 0, 0);

        // 行layout设置（高 30 dp）
        int childLayoutHeight = Util.dip2px(this, 30);
        final LinearLayout.LayoutParams paramsChildLayout = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, childLayoutHeight);
        // 一行剩下的空间
        int remainWidth = containerWidth;
        // 总高度
        int itemHeightTotal = 0;

        for (int i = 0; i < list.size(); ++i) {
            final String text = list.get(i);
            final float itemWidth = paint.measureText(text) + itemPadding;
            TextView tvItem = (TextView) inflater.inflate(R.layout.activity_text, null);
            tvItem.setText(text);

            if (i == 0) {
                itemHeightTotal = (int) (childLayoutHeight + 0.5f);
            }

            if (remainWidth > itemWidth) {
                layout.addView(tvItem);
            } else {
                layout = new LinearLayout(this);
                layout.setLayoutParams(paramsChildLayout);
                layout.setOrientation(LinearLayout.HORIZONTAL);

                // 将前面那一个textview加入新的一行
                layout.addView(tvItem);
                container.addView(layout);
                remainWidth = containerWidth;

                itemHeightTotal = itemHeightTotal + (int) (childLayoutHeight + 0.5f);
            }
            // 剩余宽度计算
            remainWidth = (int) (remainWidth - itemWidth + 0.5f);

            // 计算高度是否超出设定的高度500px,超出后设置高度为可适应性高度
            if (itemHeightTotal >= containerHeight) {
                container.setLayoutParams(params);
            }
        }
    } catch (Exception e) {
        Log.e("异常", "_draw: ", e);
    }
}

 

/******************************************页面xml*****************************************/

/*****************************************运行结果*****************************************/