setText(“test”)正在冻结UI

时间:2013-02-05 14:59:41

标签: java android

我不明白

我有一个后台线程,它获取cpu加载,然后将其设置为文本视图

问题是当执行setText()方法时,UI会冻结一秒钟,滚动浏览ui的其他元素时我会感觉到它

Runnable runnable = new Runnable() {
        @Override
        public void run() {
            while(thread) {
                try {
                    RandomAccessFile reader = new RandomAccessFile("/proc/stat", "r");
                    String load = reader.readLine();

                    String[] toks = load.split(" ");

                    long idle1 = Long.parseLong(toks[5]);
                    long cpu1 = Long.parseLong(toks[2]) + Long.parseLong(toks[3]) + Long.parseLong(toks[4])
                        + Long.parseLong(toks[6]) + Long.parseLong(toks[7]) + Long.parseLong(toks[8]);

                    try {
                        Thread.sleep(360);
                    } catch (Exception e) {
                        }

                    reader.seek(0);
                    load = reader.readLine();
                    reader.close();

                    toks = load.split(" ");

                    long idle2 = Long.parseLong(toks[5]);
                    long cpu2 = Long.parseLong(toks[2]) + Long.parseLong(toks[3]) + Long.parseLong(toks[4])
                        + Long.parseLong(toks[6]) + Long.parseLong(toks[7]) + Long.parseLong(toks[8]);

                    fLoad =  (float)(cpu2 - cpu1) / ((cpu2 + idle2) - (cpu1 + idle1));

                } catch (IOException ex) {
                        }
                final int load =(int) (fLoad*100);
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                }
                mHandler.post(new Runnable() {
                        @Override
                        public void run() {

                            setCpuLoad(load);
                        }
                    });
            }
        }
    };
    new Thread(runnable).start();
}

 private final void setCpuLoad(int load){
    cpuLoad.setProgress(load);
    cpuLoadTxt.setText(load+"%");
}

我尝试了很多东西并最终弄清楚问题出在setText()中,因为当我评论它时,UI很流畅

1 个答案:

答案 0 :(得分:1)

检查您在哪个线程中创建处理程序。 你应该在主(UI)线程上做。