Updating CPU frequency on textView (howto?)

Question

private String ReadCPUMhz()
    {
     ProcessBuilder cmd;
     String result="";
     int resultshow = 0;

     try{
      String[] args = {"/system/bin/cat", "/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq"};
      cmd = new ProcessBuilder(args);

      Process process = cmd.start();
      InputStream in = process.getInputStream();
      byte[] re = new byte[1024];
      while(in.read(re) != -1)
       {
         result = result + new String(re);
       }

      in.close();
     } catch(IOException ex){
      ex.printStackTrace();
     }
     return result;
    }

I used setText to write the value from result to a textView. So it read out the current cpu frequency when app was started and write it to this textView. The app shows f.e. 1200Mhz the whole time the app is opened. It didn't update the value.

How can I use Timer or other methods to update the current value after 1s or 250ms and write it to the textView? It should display the current CPU frequency. F.e.: 300Mhz - 1200Mhz.. updating after 1s or 250ms..

Please help me :-)

Best regards

Marcus

Answer 1

Try using runOnUiThread for updating Textview from Thread as:

public void myThread(){
        Thread th=new Thread(){

         @Override
         public void run(){
          try
          {

           while(true)
           {

           Thread.sleep(100L); //SET INTERVAL TO UPDATE TEXTVIEW TEXT
           Activity.this.runOnUiThread(new Runnable() {

            @Override
            public void run() {

       String str=ReadCPUMhz();  //CALL YOUR METHOD HERE
            tvnn.setText(str);  SET TEXT HERE
           });
           }
          }catch (InterruptedException e) {
        // TODO: handle exception
       }
         }
        };
        th.start();
       }
//....YOUR CODE
 @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
myThread();
//YOUR CODE..