Android 欢迎界面淡出动画效果(Animation)

          进入App后，想做一个画面的淡出效果，如图所示：

                                   

   代码非常简单

1 MainActivity.java

package com.example.testanimation;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.animation.AlphaAnimation;
import android.widget.ImageView;

public class MainActivity extends Activity {
        
	
	    private   ImageView   show;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		show = (ImageView)findViewById(R.id.gradually);
		  AlphaAnimation   alpha = new AlphaAnimation(1.0f, 0.0f);
		  alpha.setDuration(4000);
		  alpha.setFillAfter(true);
		  show.setAnimation(alpha);
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// Handle action bar item clicks here. The action bar will
		// automatically handle clicks on the Home/Up button, so long
		// as you specify a parent activity in AndroidManifest.xml.
		int id = item.getItemId();
		if (id == R.id.action_settings) {
			return true;
		}
		return super.onOptionsItemSelected(item);
	}
}

代码非常简单

2 main_activity.xml

这个布局文件一定切记，要把ImageView组件写在TextView组件的下方，这样ImageView组件才能完全覆盖TextView组件，如果写到TextView组件之上的话，就没办法覆盖了，这点要记住，代码相对比较简单，没什么可以讲的。

源代码地址：http://download.csdn.net/detail/danielntz/9468570