Android中如何利用定时器和倒计时实现淘宝秒杀功能

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目录结构

效果图：

imageViewHolder

public class imageViewHolder extends RecyclerView.ViewHolder {   public ImageView imageView;   public imageViewHolder(View itemView) {   super(itemView);   imageView = (ImageView) itemView;  } }

MyViewHolder

public class MyViewHolder extends RecyclerView.ViewHolder {   public TextView textView;   public MyViewHolder(View itemView) {   super(itemView);   textView = (TextView) itemView;  } }

recycleAdapter

package com.nodeprogress.snapupview.SnapUp;  import android.content.Context; import android.graphics.Color; import android.support.v7.widget.RecyclerView; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.TextView;  public class recycleAdapter extends RecyclerView.Adapter {   Context context;   public recycleAdapter(Context context) {   this.context = context;  }    @Override  public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {    if (viewType == 0){    return new imageViewHolder(new ImageView(context));   }else {    return new MyViewHolder(new TextView(context));   }  }   @Override  public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {   if (getItemViewType(position) == 0) {    imageViewHolder viewHolder = (imageViewHolder) holder;    viewHolder.imageView.setPadding(150,20,20,20);    viewHolder.imageView.setBackgroundColor(Color.BLUE);   } else {    MyViewHolder viewHolder = (MyViewHolder) holder;    viewHolder.textView.setText(" 淘宝 " + position);   }  }   @Override  public int getItemCount() {   return 21;  }   @Override  public int getItemViewType(int position) {   return (position == 20) ? 0 : 1;  }  }

MainActivity

package com.nodeprogress.snapupview;  import android.os.Bundle; import android.support.v7.app.AppCompatActivity;  import com.nodeprogress.snapupview.SnapUp.recycleAdapter; import com.nodeprogress.snapupview.View.HorizontalRecycleViewLoadMore;   public class MainActivity extends AppCompatActivity {   @Override  protected void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   setContentView(R.layout.activity_main);    HorizontalRecycleViewLoadMore recyclerView = (HorizontalRecycleViewLoadMore) findViewById(R.id.recycle);   recyclerView.setAdapter(new recycleAdapter(MainActivity.this));    SnapUpCountDownTimerView rushBuyCountDownTimerView = (SnapUpCountDownTimerView) findViewById(R.id.RushBuyCountDownTimerView);   rushBuyCountDownTimerView.setTime(1,55,3);   rushBuyCountDownTimerView.start();  } }

SnapUpCountDownTimerView

package com.nodeprogress.snapupview;  import android.annotation.SuppressLint; import android.content.Context; import android.content.res.TypedArray; import android.os.Handler; import android.os.Message; import android.util.AttributeSet; import android.view.LayoutInflater; import android.view.View; import android.widget.LinearLayout; import android.widget.TextView; import android.widget.Toast;  import java.util.Timer; import java.util.TimerTask;  @SuppressLint("HandlerLeak") public class SnapUpCountDownTimerView extends LinearLayout {   private TextView tv_hour_decade;  private TextView tv_hour_unit;  private TextView tv_min_decade;  private TextView tv_min_unit;  private TextView tv_sec_decade;  private TextView tv_sec_unit;   private Context context;   private int hour_decade;  private int hour_unit;  private int min_decade;  private int min_unit;  private int sec_decade;  private int sec_unit;   private Timer timer;   private Handler handler = new Handler() {    public void handleMessage(Message msg) {    countDown();   }  };   public SnapUpCountDownTimerView(Context context, AttributeSet attrs) {   super(context, attrs);    this.context = context;   LayoutInflater inflater = (LayoutInflater) context     .getSystemService(Context.LAYOUT_INFLATER_SERVICE);   View view = inflater.inflate(R.layout.view_countdowntimer, this);    tv_hour_decade = (TextView) view.findViewById(R.id.tv_hour_decade);   tv_hour_unit = (TextView) view.findViewById(R.id.tv_hour_unit);   tv_min_decade = (TextView) view.findViewById(R.id.tv_min_decade);   tv_min_unit = (TextView) view.findViewById(R.id.tv_min_unit);   tv_sec_decade = (TextView) view.findViewById(R.id.tv_sec_decade);   tv_sec_unit = (TextView) view.findViewById(R.id.tv_sec_unit);    TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.SnapUpCountDownTimerView);   int size = array.getInteger(R.styleable.SnapUpCountDownTimerView_viewSize, 12);     tv_hour_decade.setTextSize(size);   tv_hour_unit.setTextSize(size);   tv_min_decade.setTextSize(size);   tv_min_unit.setTextSize(size);   tv_sec_decade.setTextSize(size);   tv_sec_unit.setTextSize(size);   ((TextView)view.findViewById(R.id.colon_minute)).setTextSize(size);   ((TextView)view.findViewById(R.id.colon_hour)).setTextSize(size);  }    public void start() {   if (timer == null) {    timer = new Timer();    timer.schedule(new TimerTask() {     @Override     public void run() {      handler.sendEmptyMessage(0);     }    }, 0, 1000);   }  }    public void stop() {   if (timer != null) {    timer.cancel();    timer = null;   }  }    public void setTime(int hour, int min, int sec) {    if (hour >= 60 || min >= 60 || sec >= 60 || hour < 0 || min < 0     || sec < 0) {    throw new RuntimeException("时间格式错误,请检查你的代码");   }    hour_decade = hour / 10;   hour_unit = hour - hour_decade * 10;    min_decade = min / 10;   min_unit = min - min_decade * 10;    sec_decade = sec / 10;   sec_unit = sec - sec_decade * 10;    tv_hour_decade.setText(hour_decade + "");   tv_hour_unit.setText(hour_unit + "");   tv_min_decade.setText(min_decade + "");   tv_min_unit.setText(min_unit + "");   tv_sec_decade.setText(sec_decade + "");   tv_sec_unit.setText(sec_unit + "");  }    private void countDown() {   if (isCarry4Unit(tv_sec_unit)) {    if (isCarry4Decade(tv_sec_decade)) {     if (isCarry4Unit(tv_min_unit)) {      if (isCarry4Decade(tv_min_decade)) {       if (isCarry4Unit(tv_hour_unit)) {        if (isCarry4Decade(tv_hour_decade)) {         Toast.makeText(context, "计数完成",           Toast.LENGTH_SHORT).show();         stop();         setTime(0, 0, 0);//重置为0        }       }      }     }    }   }  }    private boolean isCarry4Decade(TextView tv) {    int time = Integer.valueOf(tv.getText().toString());   time = time - 1;   if (time < 0) {    time = 5;    tv.setText(time + "");    return true;   } else {    tv.setText(time + "");    return false;   }  }    private boolean isCarry4Unit(TextView tv) {    int time = Integer.valueOf(tv.getText().toString());   time = time - 1;   if (time < 0) {    time = 9;    tv.setText(time + "");    return true;   } else {    tv.setText(time + "");    return false;   }  } }

activity_main.xml

home_snap_up.xml

view_countdowntimer.xml

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