作为UI的基础功能组件，如果不进行封装后再使用，会出现大量重复代码，所以我封装了。
1.静态效果图展示
2.代码调用
3.自定义动画效果
4.代码调用
5.在RecyclerView使用
6.代码调用
7.钉钉考勤-圆形和方形的效果
8.代码调用
9.封装代码BroccoliManager.java
10.总结
1.静态效果图展示
image
2.代码调用
private void initPlaceholders(){
BroccoliManager.initStatic(this, R.id.tv_view_time, R.id.tv_collect_time,
R.id.tv_price, R.id.iv_clock, R.id.tv_time, R.id.iv_calendar, R.id.iv_location,
R.id.tv_location, R.id.iv_arrow_right, R.id.iv_logo, R.id.tv_organizer_name, R.id.tv_organizer_description,
R.id.tv_fans, R.id.tv_fans_number, R.id.tv_events, R.id.tv_events_number, R.id.tv_follow, R.id.tv_station);
BroccoliManager.show();
showPlaceholders();
}
private void showPlaceholders(){
mHandler.removeCallbacks(task);
mHandler.postDelayed(task,2000);
}
private Runnable task = new Runnable() {
@Override
public void run() {
showData();
}
};
private void showData() {
BroccoliManager.staticClear();
}
3.自定义动画效果
image
4.代码调用
private void initPlaceholders() {
BroccoliManager.initAction(
tvViewTimes,
tvCollectTimes,
tvPrice,
ivClock,
tvTime,
ivCalendar,
ivLocation,
tvLocation,
ivRightArrow,
ivLogo,
tvOrganizer,
tvOrganizerDescription,
tvFans,
tvFansNumber,
tvEvents,
tvEventsNumber,
tvFollow,
tvStation
);
BroccoliManager.show();
showPlaceholders();
}
private void showPlaceholders() {
mHandler.removeCallbacks(task);
mHandler.postDelayed(task, 3000);
}
private Runnable task = new Runnable() {
@Override
public void run() {
showData();
}
};
private void showData() {
BroccoliManager.staticClear();
}
5.在RecyclerView使用
image
6.代码调用
private class MyAdapter extends RecyclerView.Adapter<MyViewHolder> {
@NonNull
@Override
public MyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
View view = getLayoutInflater().inflate(R.layout.recyclerview_sample_item, viewGroup, false);
return new MyViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull final MyViewHolder myViewHolder, final int i) {
BroccoliManager.initRecyclerView(myViewHolder.itemView
, myViewHolder.tvTitle
, myViewHolder.imageView
, myViewHolder.tvPrice
, myViewHolder.tvDescription);
//delay to show the data
Runnable task = mTaskManager.get(myViewHolder.itemView);
if (task == null) {
task = new Runnable() {
@Override
public void run() {
//when you need to update data, you must to call the remove or the clear method.
BroccoliManager.byItemViewClear(myViewHolder.itemView);
if (mDataList.isEmpty()) {
return;
}
myViewHolder.imageView.setImageResource(mDataList.get(i).imageRes);
myViewHolder.tvPrice.setText("¥ " + String.valueOf(mDataList.get(i).price));
myViewHolder.tvTitle.setText(mDataList.get(i).title);
myViewHolder.tvDescription.setText(mDataList.get(i).description);
}
};
mTaskManager.put(myViewHolder.itemView, task);
} else {
myViewHolder.itemView.removeCallbacks(task);
}
myViewHolder.itemView.postDelayed(task, 3000);
}
@Override
public int getItemCount() {
return mDataList.size();
}
}
private class MyViewHolder extends RecyclerView.ViewHolder {
private ImageView imageView;
private TextView tvTitle;
private TextView tvDescription;
private TextView tvPrice;
public MyViewHolder(@NonNull View itemView) {
super(itemView);
imageView = itemView.findViewById(R.id.iv_image);
tvTitle = itemView.findViewById(R.id.tv_title);
tvDescription = itemView.findViewById(R.id.tv_description);
tvPrice = itemView.findViewById(R.id.tv_price);
}
}
7.钉钉考勤-圆形和方形的效果
image
image
8.代码调用
private void initPlaceholders() {
BroccoliManager.staticSquare(
findViewById(R.id.tv_name),
findViewById(R.id.tv_description),
findViewById(R.id.tv_day_des),
findViewById(R.id.v_shangban),
findViewById(R.id.v_xiaban),
findViewById(R.id.v_timeline),
findViewById(R.id.tv_shangban),
findViewById(R.id.tv_xiaban),
findViewById(R.id.tv_daka_des));
BroccoliManager.staticCircular(
findViewById(R.id.iv_head),
findViewById(R.id.tv_daka) );
BroccoliManager.show();
showPlaceholders();
}
private void showPlaceholders() {
mHandler.removeCallbacks(task);
mHandler.postDelayed(task, 2000);
}
private Runnable task = new Runnable() {
@Override
public void run() {
BroccoliManager.staticClear();
}
};
9.封装代码BroccoliManager.java
/**
* 占位符管理类
*/
public class BroccoliManager {
private static Broccoli mBroccoli;
// 给Recycler的item用的。
private static Map<View, Broccoli> mViewPlaceholderManager = new HashMap<>();
/**
* 静态的占位符
*
* @param context 上下文 activity
* @param views R.id.控件的id
*/
public static void initStatic(Activity context, int... views) {
if (mBroccoli == null) {
mBroccoli = new Broccoli();
}
for (int view : views) {
mBroccoli.addPlaceholders(context, view);
}
}
/**
* 动态占位符
*
* @param views 已绑定好的view
*/
public static void initAction(View... views) {
mBroccoli = new Broccoli();
for (View view : views) {
mBroccoli.addPlaceholders(PlaceholderHelper.getParameter(view));
}
}
/**
* RecyclerView的动态占位符
*
* @param itemView recyclerView整项内容的View
* @param views 里面各小项内容的view
*/
public static void initRecyclerView(View itemView, View... views) {
Broccoli broccoli = mViewPlaceholderManager.get(itemView);
if (broccoli == null) {
broccoli = new Broccoli();
mViewPlaceholderManager.put(itemView, broccoli);
}
for (View view : views) {
broccoli.addPlaceholder(new PlaceholderParameter.Builder()
.setView(view)
.setDrawable(new BroccoliGradientDrawable(Color.parseColor("#DDDDDD"),
Color.parseColor("#CCCCCC"), 0, 1000, new LinearInterpolator()))
.build());
}
broccoli.show();
}
/**
* 根据大项itemView来清除占位符
*
* @param itemView
*/
public static void byItemViewClear(View itemView) {
if (itemView != null) {
Broccoli broccoli = mViewPlaceholderManager.get(itemView);
broccoli.removeAllPlaceholders();
}
}
/**
* 当用recyclerView时在onDestroy时将mViewPlaceholderManager清空
* 防止使用BroccoliGradientDrawable时内存泄露
*/
public static void recyclerViewOnDestroy() {
//Prevent memory leaks when using BroccoliGradientDrawable
//防止使用BroccoliGradientDrawable时内存泄露
for (Broccoli broccoli : mViewPlaceholderManager.values()) {
broccoli.removeAllPlaceholders();
}
mViewPlaceholderManager.clear();
}
/**
* 清除静态占位符
*/
public static void staticClear() {
if (mBroccoli != null) {
mBroccoli.removeAllPlaceholders();
}
}
/**
* 圆形占位符
*
* @param views 可以多个圆形view 进行处理
*/
public static void staticSquare(View... views) {
int placeholderColor = Color.parseColor("#DDDDDD");
if (mBroccoli == null) {
mBroccoli = new Broccoli();
}
for (View view : views) {
mBroccoli.addPlaceholders(
new PlaceholderParameter.Builder()
.setView(view)
.setDrawable(DrawableUtils.createRectangleDrawable(placeholderColor, 0))
.build());
}
}
public static void show(){
mBroccoli.show();
}
/**
* 圆形占位符
*
* @param views 可以多个圆形view 进行处理
*/
public static void staticCircular(View... views) {
int placeholderColor = Color.parseColor("#DDDDDD");
if (mBroccoli == null) {
mBroccoli = new Broccoli();
}
for (View view : views) {
mBroccoli.addPlaceholders(
new PlaceholderParameter.Builder()
.setView(view)
.setDrawable(DrawableUtils.createOvalDrawable(placeholderColor))
.build());
}
}
}
10.总结
我是参考Android view的预加载占位效果封装使用
的文章进行更改的。
我的源码：https://pan.baidu.com/s/1rzMmcXAqFmSBL1I8O6ZHpg
提取码：w9a1
依赖
Gradle
将其添加到你的module的build.gradle中：
dependencies {
implementation 'me.samlss:broccoli:1.0.0'
}
Maven
<dependency>
<groupId>me.samlss</groupId>
<artifactId>broccoli</artifactId>
<version>1.0.0</version>
<type>pom</type>
</dependency>
