package name.cpr;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import java.util.Timer;
import java.util.TimerTask;
public class ExampleActivity extends ActionBarActivity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_example);
Timer timer = new Timer();
timer.schedule(new CheckConnection(), 0, 3000);
ImageView iv = (ImageView) findViewById(R.id.imageView);
iv.setVisibility(View.VISIBLE);
}
class CheckConnection extends TimerTask{
public void run(){
ImageView iv = (ImageView) findViewById(R.id.imageView);
iv.setVisibility(View.INVISIBLE); //<- Unfortunatly Error Here
}
}
}
启动应用程序,第一次 ImageView 可见性工作但计时器不工作,如果计时器启动同样的错误不幸的是......已停止
最佳答案
您可能想改用 android.os.Handler。
public class ExampleActivity extends ActionBarActivity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_example);
ImageView iv = (ImageView) findViewById(R.id.imageView);
iv.setVisibility(View.VISIBLE);
//
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
iv.setVisibility(View.INVISIBLE);
}
}, 3000);
}
}
祝你好运。 :)
关于android - Timer 的 ImageView 可见性错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/27501075/