Java 列表视图中的倒计时计时器
我有一个带有计时器名称和计时器时间的列表视图,我不知道如何实现倒计时部分。在ListView的每一行中,我有两个文本视图:时间和计时器的名称,然后是一个启动和停止计时器的按钮。这是我的自定义ListViewAdapter类,我认为计时器应该在OnClick方法中启动和停止,以使计时器对每一行作出反应:Java 列表视图中的倒计时计时器,java,android,timer,countdowntimer,Java,Android,Timer,Countdowntimer,我有一个带有计时器名称和计时器时间的列表视图,我不知道如何实现倒计时部分。在ListView的每一行中,我有两个文本视图:时间和计时器的名称,然后是一个启动和停止计时器的按钮。这是我的自定义ListViewAdapter类,我认为计时器应该在OnClick方法中启动和停止,以使计时器对每一行作出反应: public class CustomTimerRowAdapter extends ArrayAdapter<TimerRow> { Context context; int he
public class CustomTimerRowAdapter extends ArrayAdapter<TimerRow> {
Context context;
int height;
public CustomTimerRowAdapter(Context context, int resourceId,
List<TimerRow> items) {
super(context, resourceId, items);
this.context = context;
// Height of screen from not Activity subclass
height = context.getResources().getDisplayMetrics().heightPixels;
}
/* private view holder class */
private class ViewHolder {
TextView txtTimer;
TextView txtName;
Button bStartStop;
}
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder = null;
TimerRow rowItem = getItem(position);
LayoutInflater mInflater = (LayoutInflater) context
.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
if (convertView == null) {
convertView = mInflater.inflate(R.layout.timer_row, null);
holder = new ViewHolder();
// make layout params
holder.txtTimer = (TextView) convertView.findViewById(R.id.tvTimes);
holder.txtTimer.getLayoutParams().height = height / 10;
holder.txtName = (TextView) convertView.findViewById(R.id.tvName);
holder.txtName.getLayoutParams().height = height / 10;
holder.bStartStop = (Button) convertView
.findViewById(R.id.bStartStopTimer);
holder.bStartStop.getLayoutParams().height = height / 10;
convertView.setTag(holder);
} else
holder = (ViewHolder) convertView.getTag();
holder.txtName.setText(rowItem.getName());
holder.txtTimer.setText(rowItem.getTimer());
final String name = holder.txtName.getText().toString();
holder.bStartStop.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// THIS IS WHERE THE TIMER SHOULD START AND STOP.
Toast.makeText(context, "Selected " + name + " timer.",
Toast.LENGTH_SHORT).show();
}
});
return convertView;
}
}
公共类CustomTimeErrorWadapter扩展了ArrayAdapter{
语境;
内部高度;
公共CustomTimerRowAdapter(上下文上下文,int resourceId,
(列表项目){
超级(上下文、资源ID、项目);
this.context=上下文;
//非活动子类的屏幕高度
高度=上下文。getResources().getDisplayMetrics().heightPixels;
}
/*私有视图持有者类*/
私有类视窗持有者{
TextView txtTimer;
TextView-txtName;
按钮启动停止;
}
公共视图getView(int位置、视图转换视图、视图组父视图){
ViewHolder=null;
TimerRow rowItem=getItem(位置);
LayoutInflater mInflater=(LayoutInflater)上下文
.getSystemService(活动.布局\充气机\服务);
if(convertView==null){
convertView=mInflater.充气(R.layout.timer\u行,空);
holder=新的ViewHolder();
//制作布局参数
holder.txtTimer=(TextView)convertView.findViewById(R.id.tvTimes);
holder.txtTimer.getLayoutParams().height=height/10;
holder.txtName=(TextView)convertView.findViewById(R.id.tvName);
holder.txtName.getLayoutParams().height=height/10;
holder.bStartStop=(按钮)convertView
.findViewById(R.id.bStartStopTimer);
holder.bStartStop.getLayoutParams().height=height/10;
convertView.setTag(支架);
}否则
holder=(ViewHolder)convertView.getTag();
holder.txtName.setText(rowItem.getName());
holder.txtimer.setText(rowItem.getTimer());
最终字符串名称=holder.txtName.getText().toString();
holder.bStartStop.setOnClickListener(新的OnClickListener(){
@凌驾
公共void onClick(视图v){
//这是计时器应该启动和停止的地方。
Toast.makeText(上下文,“选定”+名称+“计时器”,
吐司。长度(短)。show();
}
});
返回视图;
}
}
计时器的长度最长可达99小时59分59秒。计时器的格式为字符串,如“hh:mm:ss” 请使用RecyclerView而不是Listview。在这里您可以查看并下载的源代码 活动\u main.xml
<RelativeLayout android:layout_width=”match_parent”
android:layout_height=”match_parent”
xmlns:android=”http://schemas.android.com/apk/res/android”>
<android.support.v7.widget.RecyclerView
android:id=”@+id/recycler_view”
android:layout_width=”match_parent”
android:layout_height=”wrap_content”
android:scrollbars=”vertical” />
</RelativeLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="15dp"
android:padding="10dp"
android:id="@+id/tv_timer"/>
</LinearLayout>
没有任何帮助。请你详细说明你的评论,因为它目前远没有建设性。
package com.androidsolutionworld.multipletimer;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.widget.LinearLayout;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
private RecyclerView recyclerView;
private ArrayList al_data = new ArrayList<>();
private Adapter obj_adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = (RecyclerView)findViewById(R.id.recycler_view);
al_data.add("1234");
al_data.add("1257");
al_data.add("100");
al_data.add("1547");
al_data.add("200");
al_data.add("500");
al_data.add("2000");
al_data.add("1000");
obj_adapter = new Adapter(al_data);
LinearLayoutManager layoutManager = new LinearLayoutManager(getApplicationContext(),LinearLayoutManager.VERTICAL,false);
recyclerView.setLayoutManager(layoutManager);
recyclerView.setAdapter(obj_adapter);
}
}
import android.os.CountDownTimer;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import java.util.ArrayList;
public class Adapter extends RecyclerView.Adapter{
private ArrayList al_data;
public class MyViewHolder extends RecyclerView.ViewHolder{
public TextView tv_timer;
CountDownTimer timer;
public MyViewHolder (View view){
super(view);
tv_timer = (TextView)view.findViewById(R.id.tv_timer);
}
}
public Adapter(ArrayList al_data) {
this.al_data = al_data;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.adapter_layout,parent,false);
return new MyViewHolder(view);
}
@Override
public void onBindViewHolder(final MyViewHolder holder, int position) {
holder.tv_timer.setText(al_data.get(position));
if (holder.timer != null) {
holder.timer.cancel();
}
long timer = Long.parseLong(al_data.get(position));
timer = timer*1000;
holder.timer = new CountDownTimer(timer, 1000) {
public void onTick(long millisUntilFinished) {
holder.tv_timer.setText("" + millisUntilFinished/1000 + " Sec");
}
public void onFinish() {
holder.tv_timer.setText("00:00:00");
}
}.start();
}
@Override
public int getItemCount() {
return al_data.size();
}
}