我知道这个问题已经被问过好几次了，但我就是不知道在哪里放置代码并不断出错。它是图像上的基本淡入动画，我首先希望它是不可见的，然后淡入。在此先感谢我的动画 xml，然后是类的 java。
XML:
<?xml version="1.0" encoding="UTF-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<alpha android:fromAlpha="0.0" android:toAlpha="1.0"
android:interpolator="@android:anim/accelerate_interpolator"
android:duration="4000"/>
</set>
爪哇：
package com.example.whattodo2;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.RelativeLayout;
public class Title extends Activity {
Button reset, rts;
ImageView title;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_title);
reset = (Button) findViewById(R.id.reset);
reset.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
double rand = Math.random();
if(rand < 0.5){
Intent reset1 = new Intent(Title.this, MainActivity.class);
startActivity(reset1);
} else {
Intent reset2 = new Intent(Title.this, Question36.class);
startActivity(reset2);
}
}
});
rts = (Button) findViewById(R.id.rts);
rts.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent rts=new Intent(Title.this,Rts.class);
startActivity(rts);
}
});
final Animation a = AnimationUtils.loadAnimation(this, R.animator.animation);
a.reset();
final ImageView rImage = (ImageView) findViewById(R.id.title);
RelativeLayout layout = (RelativeLayout) findViewById(R.id.root);
layout.setOnClickListener(new OnClickListener() {
@Override public void onClick(View v) {
rImage.startAnimation(a);
func(); //A call to the function.
}
});
}
protected void func() {
// TODO Auto-generated method stub
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.title, menu);
return true;
}
}