Question

我有4个字符串，我想每3秒在textview显示一次，并重复它。

与显示animation-list文件的.png类似。

要明确，我想这样做：

while(true){

    tv.SetText("Text1");
    //delay for 3 second
    tv.SetText("Text2");
    //delay for 3 second
    tv.SetText("Text3");
    //delay for 3 second
    tv.SetText("Text4");
    //delay for 3 second

}

Answer 1

实现这一目标你可以：

创建一个处理程序。
使用处理程序sendMessageDelayed函数以及您想要的延迟。
覆盖handleMessage函数，并在邮件到达时更新文本视图。

/ *** //

 private static final int MSG_UPDATE_STRING = 1;
 private static final int STRING_REFRESH_INTERVAL_MILLIS = 3000;
 private static StaticHandler mHandler = new StaticHandler();
 //StaticHandler is an inner class. write it inside your activity class.
 public static class StaticHandler extends Handler {
    @Override
    public void handleMessage(Message msg) {
        switch (msg.what) {
        case MSG_UPDATE_STRING:
             //update textview here
             ...
             //resend message so it will continue to refresh
             mHandler.sendEmptyMessageDelayed(MSG_DATA_PACKET_TIMEOUT,STRING_REFRESH_INTERVAL_MILLIS );
             break;
        }
    }
}

Answer 2

public class MainActivity extends ActionBarActivity {

    private TextView textView;
    private int count = 1;
    Handler handler = new Handler();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        textView = (TextView) findViewById(R.id.textView);
        handler.postDelayed(new Runnable() {

            @Override
            public void run() {
                textView.setText(count+"");
                count++;
                if (count > 3) {
                    handler.removeCallbacks(this);
                } else {
                    handler.postDelayed(this, 3000);    
                }
            }
        }, 0);
    }
}

如何SetText一些字符串重复像动画列表？

2 个答案: