接到一个需求,如何消化掉这个需求?
1.产品给测试说,一句话的需求,“观看视频5s加1积分”
2.测试告诉成功,成功告诉我,我疑惑一直+吗,成功说是,我不确信,去找产品
3.需求很混乱,测试描述不清,产品没有做需求详细设计,两个产品对这个需求不统一,讨论一会逐渐统一
4.把产品的话梳理清楚跟产品确认,画需求设计
5.确认清楚后,设计功能实现方案
6.功能设计方案变成代码
7.代码嵌入项目,完成此次功能
![](https://img.haomeiwen.com/i2066771/462a21718c71e2c2.png)
画业务逻辑图:
![](https://img.haomeiwen.com/i2066771/abe4eb77174aa272.png)
画技术方案:
![](https://img.haomeiwen.com/i2066771/5aa684bbca0b5ad6.png)
方案1:不好实现,最终选择了方案2
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private CountDownTool countDownTool;
private TextView tv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
tv = findViewById(R.id.tv);
findViewById(R.id.btn1).setOnClickListener(this);
findViewById(R.id.btn2).setOnClickListener(this);
findViewById(R.id.btn3).setOnClickListener(this);
findViewById(R.id.btn4).setOnClickListener(this);
countDownTool = new CountDownTool(5) {
@Override
protected void onTick(long second) {
tv.setText("倒计时:"+second);
}
@Override
protected void finish() {
tv.setText("完成");
}
};
}
@Override
public void onClick(View v) {
switch (v.getId()){
case R.id.btn1:
//开始
countDownTool.start();
break;
case R.id.btn2:
//暂停
countDownTool.pause();
break;
case R.id.btn3:
//继续
countDownTool.resume();
break;
case R.id.btn4:
//停止
countDownTool.stop();
break;
}
}
}
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<TextView
android:id="@+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="0s"
android:textSize="20dp"
android:textColor="@color/black"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<Button
android:id="@+id/btn1"
android:layout_width="70dp"
android:layout_height="wrap_content"
android:text="开始"
android:layout_marginLeft="10dp"
android:layout_marginBottom="100dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent" />
<Button
android:id="@+id/btn2"
android:layout_width="70dp"
android:layout_height="wrap_content"
app:layout_constraintLeft_toRightOf="@+id/btn1"
android:text="暂停"
android:layout_marginLeft="10dp"
android:layout_marginBottom="100dp"
app:layout_constraintBottom_toBottomOf="parent" />
<Button
android:id="@+id/btn3"
android:layout_width="70dp"
android:layout_height="wrap_content"
android:text="继续"
android:layout_marginLeft="10dp"
android:layout_marginBottom="100dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toRightOf="@+id/btn2" />
<Button
android:id="@+id/btn4"
android:layout_width="70dp"
android:layout_height="wrap_content"
android:text="停止"
android:layout_marginLeft="10dp"
android:layout_marginBottom="100dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toRightOf="@+id/btn3" />
</androidx.constraintlayout.widget.ConstraintLayout>
abstract class CountDownTool implements ICountDown {
/**
* 计时总时长
*/
private final long mTotalTime;
/**
* 是否暂停
*/
private boolean isPause;
private final Handler mHandler = new Handler(new Handler.Callback() {
@Override
public boolean handleMessage(Message msg) {
Long second = (Long) msg.obj;
if (second == 0) {
finish();
return true;
}
if (!isPause) {
onTick(second);
second--;
}
Message message = mHandler.obtainMessage();
message.obj = second;
mHandler.sendMessageDelayed(message, 1000);
return false;
}
});
public CountDownTool(long mTotalTimeSecond) {
this.mTotalTime = mTotalTimeSecond;
}
@Override
public void start() {
isPause = false;
mHandler.removeCallbacksAndMessages(null);
Message msg = mHandler.obtainMessage();
msg.obj = mTotalTime;
mHandler.sendMessage(msg);
}
@Override
public void stop() {
mHandler.removeCallbacksAndMessages(null);
}
@Override
public void pause() {
isPause = true;
}
@Override
public void resume() {
isPause = false;
}
protected abstract void onTick(long second);
protected abstract void finish();
}
interface ICountDown {
void start();
void pause();
void resume();
void stop();
}
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