数组中每个值之间的延迟

时间:2011-03-13 15:33:39

标签: java android

我在Long []中存储了许多值,用于android中的振动方法,

        int dot = 100;
        int dash = 220;     
        int short_gap = 200;    
        int medium_gap = 700;  
        vibIndicator = (TextView)findViewById(R.id.TextView01);
        vibPattern = new long[] {0, dash, short_gap, dot, short_gap, dot, short_gap, dot, medium_gap};          
        for (int i = 0; i < vibPattern.length; i++)
        {
            if (vibPattern[i] == 100)
            {
                vibIndicator.setBackgroundResource(R.color.White);
            }
            else if(vibPattern[i] == 220)
            {
                vibIndicator.setBackgroundResource(R.color.Red);
            }

            try 
            {                   
                Thread.sleep(vibPattern[i]);
            } 
            catch (InterruptedException e) 
            {
                //
            }
        }
        Vibrator vibrator;
        vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);       
        vibrator.vibrate(vibPattern, -1);

当它变成短划线或点

时,我需要相应地更改textview的背景颜色

应用程序会挂起一段时间(我假设它处于睡眠状态)并且仅在恢复时显示最后的背景颜色

3 个答案:

答案 0 :(得分:1)

Thread.sleep()无法保证睡眠时间,您需要自己编程,例如:

private void sleep(long ms) {
    long start = System.currentTimeMillis();
    while ((System.currentTimeMillis() - start) < ms) {
        try {
            Thread.sleep(ms - (System.currentTimeMillis() - start));
        } catch (InterruptedException e) {
        }
    }
}

答案 1 :(得分:1)

好吧,我想学习如何使用振动器并快速编写这个程序,它可以满足您的需求。必须在AndroidManifest中设置振动器权限:

<uses-permission android:name="android.permission.VIBRATE"/> 


import android.app.Activity;
import android.content.Context;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Handler;
import android.os.Vibrator;
import android.widget.TextView;
import android.widget.Toast;


public class Launch extends Activity {
    int dot = 100;         
    int dash = 220;              
    int short_gap = 200;             
    int medium_gap = 700; 
    int i = 0;
    long[] vibPattern = new long[] {0, dash, short_gap, dot, short_gap, dot, short_gap, dot, medium_gap};
    TextView vibIndicator;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        vibIndicator = (TextView)findViewById(R.id.textView1); 
        simpleTimer();
    }


    public void simpleTimer(){
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {

                if (vibPattern[i] == dot){                 
                   vibIndicator.setBackgroundColor(Color.WHITE);  
                   vibratePhone(vibPattern[i]);
                }else if(vibPattern[i] == dash){                 
                   vibIndicator.setBackgroundColor(Color.RED);
                   vibratePhone(vibPattern[i]);
                }else{
                     vibIndicator.setBackgroundColor(Color.TRANSPARENT); 
                }   

                i++;
                if (i< vibPattern.length){
                    simpleTimer();           
                }else{
                    Toast.makeText(Launch.this, "Finished", Toast.LENGTH_LONG).show();
                }  
            }
        }, vibPattern[i]);  
    }

    public void vibratePhone(long timeLength){
        Vibrator vibrator;           
        vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);                  
        try{
            vibrator.vibrate(timeLength);
        }catch(Exception e){

        }
    }

}

答案 2 :(得分:1)

在开始振动模式之前,您正在迭代所有GUI更新。因此,在进行振动模式时,它只会显示最后的状态。

之前我没有使用Android,所以我假设vibrate()阻止,直到模式完成。如果您仍想使用该方法,则需要异步执行此操作,以便更新循环并行运行。另一种选择是以更细的粒度控制振动器而不使用模式方法。这样,在每次迭代时,您可以决定是否需要打开或关闭振动器以及这对GUI更新意味着什么。