Question

如果tv.setText(Html.fromHtml(text));花费太长时间，并挂起用户界面，我该怎么办？如果我能用线程来做，你能提供一个例子吗？

Answer 1

private Handler mHandler = new Handler() {
     void handleMessage(Message msg) {
          switch(msg.what) {
               case UPDATE_TEXT_VIEW:
                    tv.setText(msg.obj); // set text with Message data
                    break;
          }
     }
}

Thread t = new Thread(new Runnable() {
     // use handler to send message to run on UI thread.
     mHandler.sendMessage(mHandler.obtainMessage(UPDATE_TEXT_VIEW, Html.fromHtml(text));
});
t.start();

Answer 2

如果您不需要解析长HTML或复杂的HTML，则Spannable的手动编写比使用Html.fromHtml()要快得多。以下示例来自Set color of TextView span in Android

TextView TV = (TextView)findViewById(R.id.mytextview01);
Spannable wordtoSpan = new SpannableString("I know just how to whisper, And I know just how to cry,I know just where to find the answers");
wordtoSpan.setSpan(new ForegroundColorSpan(Color.BLUE), 15, 30, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
TV.setText(wordtoSpan);

Android Html.fromHtml耗时太长

2 个答案: