如何以不同的方式在两个活动中使用相同的适配器(How to use same adapter in two activity in different ways)

是否可以在两个活动中为不同的工作调用相同的适配器这是我的RecyclerAdapter：从这两行调用时只有区别在于：来自Activity1.java它是：

holder.Name.setText(arrayList.get(position).getName());

并从Activity2.java

holder.Name.setText(arrayList.get(position).getVehicle());

所有其他代码是相同的，我如何使用相同的适配器来完成不同的工作。

public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.MyViewHolder> { private ArrayList<Contact> arrayList= new ArrayList<>(); public RecyclerAdapter(ArrayList<Contact> arrayList){ this.arrayList= arrayList; } @Override public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.item_view,parent,false); return new MyViewHolder(view); } @Override public void onBindViewHolder (MyViewHolder holder, int position) { holder.Name.setText(arrayList.get(position).getName()); int sync_status = arrayList.get(position).getSync_status(); if(sync_status== DbContact.SYNC_STATUS_OK){ holder.Sync_Status.setImageResource(R.drawable.success); } else { holder.Sync_Status.setImageResource(R.drawable.stopwatch); } } @Override public int getItemCount() { return arrayList.size(); } public static class MyViewHolder extends RecyclerView.ViewHolder{ ImageView Sync_Status; TextView Name; public MyViewHolder(View itemView) { super(itemView); Sync_Status=(ImageView)itemView.findViewById(R.id.imgSync); Name=(TextView)itemView.findViewById(R.id.txtName); } } }

Is it possible to call same adapter in two activity for different different work Here is my RecyclerAdapter: Only difference when calling from two activity is in this line: From Activity1.java it is:

holder.Name.setText(arrayList.get(position).getName());

And from Activity2.java

holder.Name.setText(arrayList.get(position).getVehicle());

All other code is same how can I use same adapter for different different work.

public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.MyViewHolder> { private ArrayList<Contact> arrayList= new ArrayList<>(); public RecyclerAdapter(ArrayList<Contact> arrayList){ this.arrayList= arrayList; } @Override public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.item_view,parent,false); return new MyViewHolder(view); } @Override public void onBindViewHolder (MyViewHolder holder, int position) { holder.Name.setText(arrayList.get(position).getName()); int sync_status = arrayList.get(position).getSync_status(); if(sync_status== DbContact.SYNC_STATUS_OK){ holder.Sync_Status.setImageResource(R.drawable.success); } else { holder.Sync_Status.setImageResource(R.drawable.stopwatch); } } @Override public int getItemCount() { return arrayList.size(); } public static class MyViewHolder extends RecyclerView.ViewHolder{ ImageView Sync_Status; TextView Name; public MyViewHolder(View itemView) { super(itemView); Sync_Status=(ImageView)itemView.findViewById(R.id.imgSync); Name=(TextView)itemView.findViewById(R.id.txtName); } } }

最满意答案

public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.MyViewHolder> { private ArrayList<Contact> arrayList= new ArrayList<>(); private int whichActivity; public RecyclerAdapter(ArrayList<Contact> arrayList, int activity){ whichActivity = activity; this.arrayList= arrayList; } @Override public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.item_view,parent,false); return new MyViewHolder(view); } @Override public void onBindViewHolder (MyViewHolder holder, int position) { if(whichActivity == 0) { holder.Name.setText(arrayList.get(position).getName()); } else { holder.Name.setText(arrayList.get(position).getVehicle()); } int sync_status = arrayList.get(position).getSync_status(); if(sync_status== DbContact.SYNC_STATUS_OK){ holder.Sync_Status.setImageResource(R.drawable.success); } else { holder.Sync_Status.setImageResource(R.drawable.stopwatch); } } @Override public int getItemCount() { return arrayList.size(); } public static class MyViewHolder extends RecyclerView.ViewHolder{ ImageView Sync_Status; TextView Name; public MyViewHolder(View itemView) { super(itemView); Sync_Status=(ImageView)itemView.findViewById(R.id.imgSync); Name=(TextView)itemView.findViewById(R.id.txtName); } } }

试试这个代码。现在，当您在Activity1中创建RecyclerAdapter时， 调用new RecyclerAdapter（arrayList，0），并在Activity2中创建RecyclerAdapter时， 调用new RecyclerAdapter（arrayList，1） 。您只是将一个变量传递给构造函数，以便您的适配器知道它所处的活动，并且可以根据活动运行不同的逻辑。

public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.MyViewHolder> { private ArrayList<Contact> arrayList= new ArrayList<>(); private int whichActivity; public RecyclerAdapter(ArrayList<Contact> arrayList, int activity){ whichActivity = activity; this.arrayList= arrayList; } @Override public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { View view= LayoutInflater.from(parent.getContext()).inflate(R.layout.item_view,parent,false); return new MyViewHolder(view); } @Override public void onBindViewHolder (MyViewHolder holder, int position) { if(whichActivity == 0) { holder.Name.setText(arrayList.get(position).getName()); } else { holder.Name.setText(arrayList.get(position).getVehicle()); } int sync_status = arrayList.get(position).getSync_status(); if(sync_status== DbContact.SYNC_STATUS_OK){ holder.Sync_Status.setImageResource(R.drawable.success); } else { holder.Sync_Status.setImageResource(R.drawable.stopwatch); } } @Override public int getItemCount() { return arrayList.size(); } public static class MyViewHolder extends RecyclerView.ViewHolder{ ImageView Sync_Status; TextView Name; public MyViewHolder(View itemView) { super(itemView); Sync_Status=(ImageView)itemView.findViewById(R.id.imgSync); Name=(TextView)itemView.findViewById(R.id.txtName); } } }

Try this code. Now when you create your RecyclerAdapter in Activity1 call new RecyclerAdapter(arrayList, 0) and when you create your RecyclerAdapter in Activity2 call new RecyclerAdapter(arrayList, 1). You are just passing a variable into the constructor so your adapter knows which activity it is in and can run through different logic depending on the activity.

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