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仿慕课网下拉加载动画 Android实现仿慕课网下拉加载动画

掏富小牛 人气:0
想了解Android实现仿慕课网下拉加载动画的相关内容吗,掏富小牛在本文为您仔细讲解仿慕课网下拉加载动画的相关知识和一些Code实例,欢迎阅读和指正,我们先划重点:Android,下拉加载动画,下面大家一起来学习吧。

具体实现方法就不多介绍了先附上源码,相信大家都容易看的懂:

这里为了让这个动画效果可被复用,于是就继承了ImageView 去实现某些方法

 

package com.example.loading_drawable;

import android.content.Context;
import android.graphics.drawable.AnimationDrawable;
import android.util.AttributeSet;
import android.util.Log;
import android.view.View;
import android.view.animation.Animation;
import android.widget.ImageView;

public class MyImgView extends ImageView {
// 动画图层类
private AnimationDrawable bg_anim;

public MyImgView(Context context) {
super(context, null);
initView();
}

public MyImgView(Context context, AttributeSet attrs) {
super(context, attrs, 0);
}

public MyImgView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);

}
  //初始化
private void initView() {
setBackgroundResource(R.drawable.flash_anim);
bg_anim = (AnimationDrawable) getBackground();
Log.i("AAA", "iniView");
}

/**
* 开启动画效果
*/
public void startAnim() {
if (bg_anim != null) {
 bg_anim.start();
}
}

/**
* 停止动画效果
*/
public void stopAnim() {
if (bg_anim != null && bg_anim.isRunning()) {
 bg_anim.stop();
}
}

/*
* (non-Javadoc)
* 
* @see android.widget.ImageView#setVisibility(int) 当控件被显示时就调用 开启动画效果,反之
*/
@Override
public void setVisibility(int visibility) {
super.setVisibility(visibility);
if (visibility == View.VISIBLE) {
 startAnim();
} else {
 stopAnim();
}
}

}

 接下来就是:在res文件夹下新建 drawable文件夹,再此文件夹下新建 flash_anim.xml文件,具体如下:

 

<?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/a01_02" android:duration="50"/>
<item android:drawable="@drawable/a01_04" android:duration="50"/>
<item android:drawable="@drawable/a01_06" android:duration="50"/>
<item android:drawable="@drawable/a01_08" android:duration="50"/>
<item android:drawable="@drawable/a01_10" android:duration="50"/>
<item android:drawable="@drawable/a01_12" android:duration="50"/>
<item android:drawable="@drawable/a01_14" android:duration="50"/>
<item android:drawable="@drawable/a01_16" android:duration="50"/>
<item android:drawable="@drawable/a01_25" android:duration="50"/>
<item android:drawable="@drawable/a01_26" android:duration="50"/>
<item android:drawable="@drawable/a01_27" android:duration="50"/>
<item android:drawable="@drawable/a01_28" android:duration="50"/>
<item android:drawable="@drawable/a01_30" android:duration="50"/>
<item android:drawable="@drawable/a01_31" android:duration="50"/>
<item android:drawable="@drawable/a01_32" android:duration="50"/>
<item android:drawable="@drawable/a01_41" android:duration="50"/>
<item android:drawable="@drawable/a01_42" android:duration="50"/>
<item android:drawable="@drawable/a01_43" android:duration="50"/>
<item android:drawable="@drawable/a01_44" android:duration="50"/>
<item android:drawable="@drawable/a01_45" android:duration="50"/>
<item android:drawable="@drawable/a01_46" android:duration="50"/>
<item android:drawable="@drawable/a01_47" android:duration="50"/>
<item android:drawable="@drawable/a01_48" android:duration="50"/>
<item android:drawable="@drawable/a01_57" android:duration="50"/>
<item android:drawable="@drawable/a01_58" android:duration="50"/>
<item android:drawable="@drawable/a01_59" android:duration="50"/>
<item android:drawable="@drawable/a01_60" android:duration="50"/>
<item android:drawable="@drawable/a01_61" android:duration="50"/>
<item android:drawable="@drawable/a01_62" android:duration="50"/>
<item android:drawable="@drawable/a01_63" android:duration="50"/>
<item android:drawable="@drawable/a01_64" android:duration="50"/>
</animation-list>

这样就基本搞定了,接下来就要在main中调用自定义的main就可以;如下:

package com.example.loading_drawable;

import android.app.Activity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;

/**
* @author Administrator 慕课网下拉刷新进度显示控件
* 
*/
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 LinearLayout rootLayout = new LinearLayout(this);
 rootLayout.setOrientation(LinearLayout.VERTICAL);
 rootLayout.setLayoutParams(new LinearLayout.LayoutParams(
   LinearLayout.LayoutParams.MATCH_PARENT,
   LinearLayout.LayoutParams.MATCH_PARENT));
 rootLayout.setGravity(Gravity.CENTER);

 Button btn = new Button(this);
 btn.setText("展现动画");

 final MyImgView imgView = new MyImgView(MainActivity.this);
 imgView.setLayoutParams(new LinearLayout.LayoutParams(
   LinearLayout.LayoutParams.WRAP_CONTENT,
   LinearLayout.LayoutParams.WRAP_CONTENT));
 imgView.setVisibility(View.GONE);

 rootLayout.addView(btn);
 rootLayout.addView(imgView);

 setContentView(rootLayout);

 btn.setOnClickListener(new OnClickListener() {

  @Override
  public void onClick(View arg0) {
   imgView.setVisibility(View.VISIBLE);
  }
 });
}
}

这里是用自定义代码布局文件做的,布局方便,插件代码整合,如上所述,这个动画就完成了,只在需要的地方设置imgview为显示,动画就会开启,隐藏动画就会被关闭。

具体内容到此为止,希望大家能够喜欢。

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