android应用加载过程中的loading动画

应用加载过程中的loading动画：

LoadingView .java

/***

* loading 动画的实现

* @author

*

*/

public class LoadingView extends RelativeLayout {

private LayoutInflater mLayoutInflater;

private RelativeLayout mRLayout;

private ImageView mDot01Iv, mDot02Iv, mDot03Iv, mDot04Iv, mDot05Iv;

private Handler mHandler = null;

Context mContext;

public LoadingView(Context context) {

super(context);

mContext = context;

}

public LoadingView(Context context, AttributeSet attrs) {

super(context, attrs);

mContext = context;

mLayoutInflater = LayoutInflater.from(context);

mRLayout = (RelativeLayout) mLayoutInflater.inflate(

R.layout.view_loading,

LoadingView.this, true);

mDot01Iv = (ImageView) mRLayout

.findViewById(R.id.view_loading_first_iv);

mDot02Iv = (ImageView) mRLayout.findViewById(R.id.view_loading_sec_iv);

mDot03Iv = (ImageView) mRLayout

.findViewById(R.id.view_loading_third_iv);

mDot04Iv = (ImageView) mRLayout.findViewById(R.id.view_loading_four_iv);

mDot05Iv = (ImageView) mRLayout.findViewById(R.id.view_loading_five_iv);

}

/***

* 显示loading动画

*/

public void show() {

playAnimation();

}

/***

* 取消loading动画

*/

public void dismiss() {

Thread.interrupted();

}

// 不断发送消息，切换图片

private void playAnimation() {

new Thread() {

@Override

public void run() {

while (true) {

for (int i = 5; i > 0; i--) {

mHandler.sendEmptyMessage(i);

try {

sleep(300);

} catch (InterruptedException e) {

e.printStackTrace();

}

}

}

}

}.start();

// handler接受消息进行变化

mHandler = new Handler() {

@Override

public void handleMessage(Message msg) {

switch (msg.what)

{

case 1:

mDot01Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.alpha_bg));

mDot02Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.icon));

mDot03Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.icon));

mDot04Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.icon));

mDot05Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.icon));

break;

case 2:

mDot01Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.icon));

mDot02Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.alpha_bg));

mDot03Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.icon));

mDot04Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.icon));

mDot05Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.icon));

break;

case 3:

mDot01Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.icon));

mDot02Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.icon));

mDot03Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.alpha_bg));

mDot04Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.icon));

mDot05Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.icon));

break;

case 4:

mDot01Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.icon));

mDot02Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.icon));

mDot03Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.icon));

mDot04Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.alpha_bg));

mDot05Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.icon));

break;

case 5:

mDot01Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.icon));

mDot02Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.icon));

mDot03Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.icon));

mDot04Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.icon));

mDot05Iv.setImageDrawable(mContext.getResources()

.getDrawable(R.drawable.alpha_bg));

break;

}

}

};

}

}

view_loading.xml

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

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

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_gravity="center"

android:background="#000000"

>

<ImageView

android:id="@+id/view_loading_first_iv"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:src="@drawable/icon"

/>

<ImageView

android:id="@+id/view_loading_sec_iv"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:src="@drawable/icon"

android:layout_toRightOf="@+id/view_loading_first_iv"

/>

<ImageView

android:id="@+id/view_loading_third_iv"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:src="@drawable/icon"

android:layout_toRightOf="@+id/view_loading_sec_iv"

/>

<ImageView

android:id="@+id/view_loading_four_iv"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:src="@drawable/icon"

android:layout_toRightOf="@+id/view_loading_third_iv"

/>

<ImageView

android:id="@+id/view_loading_five_iv"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:src="@drawable/icon"

android:layout_toRightOf="@+id/view_loading_four_iv"

/>

</RelativeLayout>