在运行时的Android更新视图视图、Andr、oid

2023-09-07 16:53:54 作者：患得患失像神经!

这个例子是pretty的简单：我希望让用户知道哪些应用程序正在做通过只是显示一个文本（canvas.drawText（））。然后，出现我的第一个消息，而不是其他的。我的意思是，我有一个的setText的方法，但它没有更新。

The example is pretty straightforward: i want to let the user know about what the app is doing by just showing a text (canvas.drawText()). Then, my first message appears, but not the other ones. I mean, i have a "setText" method but it doesn't updates.

onCreate(Bundle bundle) {
    super.onCreate(bundle);
    setContentView(splash); // splash is the view class
    loadResources();
    splash.setText("this");
    boundWebService();
    splash.setText("that"):
    etc();
    splash.setText("so on");
}

视图的文本绘制的工作原理是这样做只是在的drawText的OnDraw（）;,这样的setText更改文本，但并没有表现出来。

The view's text drawing works by doing just a drawText in onDraw();, so setText changes the text but doesn't show it.

有人建议我更换观点与SurfaceView，但它是很多的麻烦，只是一对夫妇的更新，所以...如何赫克我可以dinamically更新视图在运行时？

Someone recommended me replacing the view with a SurfaceView, but it would be alot of trouble for just a couple of updates, SO... how the heck can i update the view dinamically at runtime?

这应该是很简单的，只是显示一个文本说，2秒钟，然后主线程做他的东西，然后更新文本...

It should be quite simple, just showing a text for say 2 seconds and then the main thread doing his stuff and then updating the text...

谢谢！

更新：

我想实现handler.onPost（），但相同的故事一遍。让我把你的code：

I tried implementing handler.onPost(), but is the same story all over again. Let me put you the code:

public class ThreadViewTestActivity extends Activity {

Thread t;
Splash splash;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    splash = new Splash(this);
    t = new Thread(splash);
    t.start();

    splash.setTextow("OA");
    try { Thread.sleep(4000); } catch (InterruptedException e) { }
    splash.setTextow("LALA");
}       
}

和

public class Splash implements Runnable {

Activity activity;
final Handler myHandler = new Handler();

public Splash(Activity activity) {
    this.activity=activity;
}   

@Override
public void run() {
    // TODO Auto-generated method stub

}

public synchronized void setTextow(final String textow) {
    // Wrap DownloadTask into another Runnable to track the statistics
    myHandler.post(new Runnable() {
        @Override
        public void run() {
            TextView t = (TextView)activity.findViewById(R.id.testo);
            t.setText(textow);
            t.invalidate(); 
        }                   
    });
}
}

尽管飞溅在其他线程，我把睡眠在主线程中，我使用的处理程序来管理用户界面和一切，这不改变的事情，那只能说明上一次更新。

Although splash is in other thread, i put a sleep on the main thread, i use the handler to manage UI and everything, it doesn't changes a thing, it only shows the last update.

在运行时的Andr​​oid更新视图视图、Andr、oid

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在运行时的Android更新视图视图、Andr、oid