淡出当前活动的视图

Question

当按下按钮时,我希望我的活动视图淡出.我将动画代码放在按钮的OnClickListener()中,但淡出没有发生.所以任何想法如何在点击按钮时设法淡出当前活动的视图？提前致谢 .....

实际上,我的目的是,在我的应用程序中,当一个活动开始时,该活动的视图将淡入,当活动结束时,它的视图将淡出,然后新活动的视图将淡入.下面,我给我的代码,请帮助找出那里的问题.....

public class First extends Activity {

Animation slide;
View view;

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

    view = (View) findViewById(android.R.id.content);

    slide = AnimationUtils.loadAnimation(this, R.anim.fade_in);
    view.startAnimation(slide);

    Button btn = (Button) findViewById(R.id.retour);
    btn.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {

                Intent intent = new Intent(v.getContext(),Second.class);
                slide = AnimationUtils.loadAnimation(First.this, R.anim.fade_out);
                view.startAnimation(slide);
                Test.group.replaceContentView("Second", intent, 0);

            }
    });

}

}

Answer 1

在onCreate()方法上添加如下内容:

    final Button button = (Button) findViewById(R.id.button);
    button.setOnClickListener(new OnClickListener() {

        public void onClick(View v) {

            final View l = findViewById(R.id.main);

            Animation a = AnimationUtils.loadAnimation(
                    YourActivity.this, android.R.anim.fade_out);
            a.setDuration(200);
            a.setAnimationListener(new AnimationListener() {

                public void onAnimationEnd(Animation animation) {
                        // Do what ever you need, if not remove it.  
                }

                public void onAnimationRepeat(Animation animation) {
                        // Do what ever you need, if not remove it.  
                }

                public void onAnimationStart(Animation animation) {
                        // Do what ever you need, if not remove it.  
                }

            });
            l.startAnimation(a);
        }
    });

你的Layout xml应该以一个id ="@ + id/main"的View开头,并包含一个id ="@ + id/button"的按钮

例:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:orientation="vertical"
     android:id="@+id/main"
     android:drawingCacheQuality="high"
         android:layout_width="fill_parent"
         android:layout_height="fill_parent">
.....

    <Button
        android:id="@+id/button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
                    android:text="Fade out">
    </Button>