Question

我正在制作一个带有webview的应用程序。这个webview通过加载url使用了一些时间，所以我希望Imageview在它消失之前显示约3秒。这是我的布局文件。在应用程序启动3秒后，如何在这两个视图上交换可见性？

<ImageView android:id="@+id/imageLoading1"
    android:layout_height="fill_parent"
    android:layout_width="fill_parent"
    android:visibility="visible"
    android:src="@drawable/logo"
    />

<android.webkit.WebView
    android:id="@+id/wvwMain"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:visibility="gone"
    >

Answer 1

new Handler().postDelayed(new Runnable() {
    public void run() {
        findViewById(R.id.imageLoading1).setVisibility(View.GONE);
        findViewById(R.id.wvwMain).setVisibility(View.VISIBLE);
    }
}, 3000);

这将在后台等待3秒，之后它会更改回UI线程并设置可见性。

Answer 2

imageView.postDelayed(new Runnable(){
   public void run(){ imageView.setVisibility(View.GONE);}
},3000);

Answer 3

此代码是一个示例，说明如何使用CountDown。

import android.os.CountDownTimer;   


public class Sample extends Activity {

  MyCustomCountDown timer;
  ImageView imageview;
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    imageview = (ImageView) findViewById(R.id.imageLoading1);
    timer = new MyCustomCountDown(3 * 1000, 1000);
    timer.start();
  }

  public class MyCustomCountDown extends CountDownTimer {
      public MyCount(long millisInFuture, long countDownInterval) {
        super(millisInFuture, countDownInterval);
      }

      @Override
      public void onFinish() {
        //some script here
        imageview.setVisible(View.GONE); ////HERE HIDE YOUR IMAGE.
      }

      @Override
      public void onTick(long millisUntilFinished) {
        //some script here 
      }   
    } 
}

这是Sample to how make a Splash

Answer 4

试试这个JavaScript：

myImageView.postDelayed(
new Runnable(){
public void run(){ 
myImageView.setVisibility(View.GONE);
}
},3000);

应用启动后，Imageview可见3秒

4 个答案: