今天我们来研究网络加载中设计的加载界面
效果图：
2016-10-18-06mzload.gif
我们先实现实现加载页面，这里我们继承FrameLayout ，主要就是在网络加载和失败覆盖在我们需要显示的页面上面就ok！
LoadingFramelayout.java
public class LoadingFramelayout extends FrameLayout {
private ImageView mIvLoading;
private Button mBtnReTry;
private RelativeLayout mLoadingView;
private AnimationDrawable mAnimationDrawable;
private OnReloadListener mOnReloadListener;
//构造方法，在我们需要网络加载页面是调用，看清楚，第二个传入的一个布局
public LoadingFramelayout(Context context, @LayoutRes int res) {
super(context);
LayoutInflater mInflater = LayoutInflater.from(context);
mInflater.inflate(res,this);
View rootView = mInflater.inflate(R.layout.fragment_loading_framelayout,this);
mLoadingView = (RelativeLayout) rootView.findViewById(R.id.load_view);
mIvLoading = (ImageView) rootView.findViewById(R.id.iv_loading);
mBtnReTry = (Button) rootView.findViewById(R.id.btn_retry);
mBtnReTry.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
mOnReloadListener.onReload();
}
});
init(context);
}
// 构造方法，在我们需要网络加载页面是调用，看清楚，第二个传入的一个View
public LoadingFramelayout(Context context,View view) {
super(context);
addView(view);
LayoutInflater mInflater = LayoutInflater.from(context);
View rootView = mInflater.inflate(R.layout.fragment_loading_framelayout,this);
mLoadingView = (RelativeLayout) rootView.findViewById(R.id.load_view);
mIvLoading = (ImageView) rootView.findViewById(R.id.iv_loading);
mBtnReTry = (Button) rootView.findViewById(R.id.btn_retry);
mBtnReTry.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
mOnReloadListener.onReload();
}
});
init(context);
}
//这里是一个动画效果，我们这里采用6张不同加载时候的图片
private void init(Context context) {
mAnimationDrawable = new AnimationDrawable();
mAnimationDrawable.setOneShot(false);
mAnimationDrawable.addFrame(ContextCompat.getDrawable(context,R.drawable.loading_01),100);
mAnimationDrawable.addFrame(ContextCompat.getDrawable(context,R.drawable.loading_02),100);
mAnimationDrawable.addFrame(ContextCompat.getDrawable(context,R.drawable.loading_03),100);
mAnimationDrawable.addFrame(ContextCompat.getDrawable(context,R.drawable.loading_04),100);
mAnimationDrawable.addFrame(ContextCompat.getDrawable(context,R.drawable.loading_05),100);
mAnimationDrawable.addFrame(ContextCompat.getDrawable(context,R.drawable.loading_06),100);
mIvLoading.setImageDrawable(mAnimationDrawable);
mIvLoading.post(new Runnable() {
@Override
public void run() {
mAnimationDrawable.start();
}
});
}
//这一个用于完成加载的调用方法
public void completeLoading(){
stopLoading();
post(new Runnable() {
@Override
public void run() {
mLoadingView.setVisibility(GONE);
}
});
}
//成功和失败后停着加载，将动画stop
private void stopLoading() {
((AnimationDrawable)mIvLoading.getDrawable()).stop();
}
//在加载失败后，点击加载再次加载的时候调用
public void startLoading(){
post(new Runnable() {
@Override
public void run() {
mBtnReTry.setVisibility(GONE);
mIvLoading.setImageDrawable(mAnimationDrawable);
((AnimationDrawable)mIvLoading.getDrawable()).start();
}
});
}
//加载失败后，停着动画，将失败页面和重新加载按钮Visible出来
public void loadingFailed(){
stopLoading();
post(new Runnable() {
@Override
public void run() {
mIvLoading.setImageResource(R.drawable.loading_failed);
mBtnReTry.setVisibility(VISIBLE);
}
});
}
//在重新加载的时候用来回调重新加载的方法
public void setOnReloadListener(OnReloadListener onReloadListener) {
mOnReloadListener = onReloadListener;
}
//实现接口，重新加载用作回调
public interface OnReloadListener {
void onReload();
}
}
MainActivity.java作为一个开始请求网络的发起页面
device-2016-10-17-214400.png
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}
private void init() {
//监听按钮，进入下一页
findViewById(R.id.btn_load_net).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(MainActivity.this,NetWorkActivity.class);
startActivity(intent);
}
});
}
}
NetWorkActivity.java 使我们用来模拟网络请求成功和失败
加载成功后的界面
device-2016-10-17-214215.png
public class NetWorkActivity extends Activity {
private LoadingFramelayout mLoadingFramelayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mLoadingFramelayout = newLoadingFramelayout(this,R.layout.activity_net_work);
setContentView(mLoadingFramelayout);
init();
}
private void init() {
simulation2NetworkFialed();
}
//模拟网络加载失败
private void simulation2NetworkFialed(){
//开启一个子线程
new Thread(new Runnable() {
@Override
public void run() {
try {
Thread.sleep(2000);//这里我们模拟网络请求休眠2s
mLoadingFramelayout.loadingFailed();
mLoadingFramelayout.setOnReloadListener(new LoadingFramelayout.OnReloadListener() {
@Override
public void onReload() {
mLoadingFramelayout.startLoading();
simulation2Network();
}
});
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}).start();
}
//网络请求通畅
private void simulation2Network(){
//开启一个子线程
new Thread(new Runnable() {
@Override
public void run() {
try {
Thread.sleep(2000); //这里模拟再次请求网络
mLoadingFramelayout.completeLoading();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}).start();
}
}