利用动画模拟火箭发射场景

1.布局文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical"

    android:background="@drawable/rocket_bg"

     >

    <ImageView 

        android:id="@+id/iv_num"

        android:visibility="gone"

        android:layout_height="50dp"

        android:layout_width="80dp"

        android:layout_gravity="center"

        android:background="@drawable/num_anim"

        />

    <Button

         android:onClick="load"

        android:layout_width="50dp"

        android:layout_height="30dp"

        android:layout_gravity="right"

        android:text="装载"

        android:layout_marginTop="150px"

        android:background="@drawable/btn_normal"

    ></Button>

    <Button

        android:onClick="fire"

        android:layout_width="50dp"

        android:layout_height="30dp"

        android:layout_gravity="right"

        android:text="点火"

        android:layout_marginTop="30px"

        android:background="@drawable/btn_normal"

    ></Button>

      <Button

        android:onClick="send"

        android:layout_width="50dp"

        android:layout_height="30dp"

        android:layout_gravity="right"

        android:text="发射"

        android:layout_marginTop="30px"

        android:background="@drawable/btn_normal"

    ></Button>

    <ImageView

        android:visibility="gone"

        android:id="@+id/iv_01"

        android:layout_height="wrap_content"

        android:layout_width="wrap_content"

        android:layout_gravity="center_horizontal"

        android:layout_marginTop="-30px"

        android:class="lazyload" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB/AAffA0nNPuCLAAAAAElFTkSuQmCC" data-original="@drawable/rocket2"        

        android:background="@drawable/fire_anim"

        />

</LinearLayout>

3.帧动画xml文件

3.1 num_main.xml

<?xml version="1.0" encoding="utf-8"?>

<animation-list xmlns:android="http://schemas.android.com/apk/res/android" 

    android:oneshot="true"

    >

    <item

       android:drawable="@drawable/number5" android:duration="1000"

        ></item>

     <item

       android:drawable="@drawable/number4" android:duration="1000"

        ></item>

      <item

       android:drawable="@drawable/number3" android:duration="1000"

        ></item>

       <item

       android:drawable="@drawable/number2" android:duration="1000"

        ></item>

        <item

       android:drawable="@drawable/number1" android:duration="1000"

        ></item>

</animation-list>

3.2 fire_main.xml

<?xml version="1.0" encoding="utf-8"?>

<animation-list xmlns:android="http://schemas.android.com/apk/res/android" 

    android:oneshot="false"

    >

    <item

       android:drawable="@drawable/rocket1" android:duration="100"

        ></item>

     <item

       android:drawable="@drawable/rocket2" android:duration="100"

        ></item>

      <item

       android:drawable="@drawable/rocket3" android:duration="100"

        ></item>

       <item

       android:drawable="@drawable/rocket4" android:duration="100"

        ></item>

        <item

       android:drawable="@drawable/rocket5" android:duration="100"

        ></item>

         <item

       android:drawable="@drawable/rocket6" android:duration="100"

        ></item>

</animation-list>

2.MainActivity.java

package com.example.day016_ex01;

import android.os.AsyncTask;

import android.os.Bundle;

import android.animation.AnimatorSet;

import android.animation.ObjectAnimator;

import android.annotation.SuppressLint;

import android.app.Activity;

import android.content.AsyncTaskLoader;

import android.graphics.drawable.AnimationDrawable;

import android.view.Menu;

import android.view.View;

import android.widget.ImageView;

import android.widget.Toast;

public class MainActivity extends Activity {

static int load=0,fire=1,send=2;

//记录倒计时的时间

    int time=0;

ImageView iv_fire,iv_num;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

    iv_fire=(ImageView) findViewById(R.id.iv_01);

    iv_num=(ImageView) findViewById(R.id.iv_num);

}

public void load(View v){

//装载

iv_fire.setVisibility(View.VISIBLE);

load++;

}

public void fire(View v){

    AnimationDrawable num=(AnimationDrawable) iv_num.getBackground();

    if(load==fire){ 

     iv_num.setVisibility(View.VISIBLE);

      //点火倒计时

      num.start();

      int count=num.getNumberOfFrames();

      for(int i=0;i<count;i++){

       time+=num.getDuration(i);

      }

      new MyTask().execute();

    }else{

     Toast.makeText(this,"您还没有加载火箭呢!",0).show();

    }

}

@SuppressLint("NewApi")

public void send(View v){

        if(load==1&&fire==send){

         ObjectAnimator tranX=ObjectAnimator.ofFloat

(iv_fire,"translationY",0,-400);

     tranX.setDuration(2000);

     ObjectAnimator scaleX=ObjectAnimator.ofFloat

(iv_fire,"scaleX",1.0f,0.5f);

     ObjectAnimator scaleY=ObjectAnimator.ofFloat

(iv_fire,"scaleY",1.0f,0.5f);

     scaleX.setDuration(2000);

     scaleY.setDuration(2000);

     AnimatorSet set=new AnimatorSet();

     set.playTogether(tranX,scaleX,scaleY);

     set.start();

        }else{

         Toast.makeText(this,"您加载火箭了吗？点火了吗?", 0).show();

        }

}

private class MyTask extends AsyncTask<Void, Void, Void>{

@Override

protected Void doInBackground(Void... params) {

try {

Thread.sleep(time);

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

return null;

}

@Override

protected void onPostExecute(Void result) {

// TODO Auto-generated method stub

super.onPostExecute(result);

    iv_num.setVisibility(View.GONE);

    fire++;

AnimationDrawable fire=(AnimationDrawable) 

iv_fire.getBackground();

    //点火启动

    fire.start();

}

}

}

原文链接：http://www.apkbus.com/blog-813041-61222.html