runOnUiThread使用实例

来源：互联网发布：win7 java 编辑：程序博客网时间：2024/05/16 15:24

前面一篇文章(http://blog.csdn.net/jasper_success/article/details/50675651)，通过计算质数这样一个例子讲解了Handler的用法，这里同样使用这个例子来讲解runOnUiThread的用法。通过这个方法可以更加简单地实现UI更新。

直接上代码

public class UIUpdateActivity extends Activity{    private EditText editText;    private TextView showText;    public static Handler uiHandler;    public static int num;    public static String result;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        editText = (EditText) findViewById(R.id.editText);        showText = (TextView) findViewById(R.id.showText);    }    public void cal(View view){        result = showText.getText().toString();        new Thread(new Runnable() {            @Override            public void run() {                //计算质数                List<Integer> numList = new ArrayList<Integer>();                outer:                for (int i = 2; i < UIUpdateActivity.num; i++) {                    for (int j = 2; j < Math.sqrt(i); j++) {                        if (i % j == 0) {                            continue outer;                        }                    }                    numList.add(i);                }                String result = numList.toString();                UIUpdateActivity.result = result;                //通过runOnUiThread来更新UI                UIUpdateActivity.this.runOnUiThread(new Runnable() {                    @Override                    public void run() {                        showText.setText(UIUpdateActivity.result);                    }                });            }        }).start();    }}

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