如果我想在每个cardview中进行不同的文本?(带有ArrayList)

Question

我想将text2设置为每个cardView的文本，

我不知道如何在MainActivity中使用arraylist。

希望每个人都帮助我。

thx ..

这是我的MainActivity.java

package rachman.a.haditsarbain;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.View;
import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    private RecyclerView mRecyclerView;
    private RecyclerView.Adapter mAdapter;
    private RecyclerView.LayoutManager mLayoutManager;
    private static String LOG_TAG = "MainActivity";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);
        mRecyclerView.setHasFixedSize(true);
        mLayoutManager = new LinearLayoutManager(this);
        mRecyclerView.setLayoutManager(mLayoutManager);
        mAdapter = new MyRecyclerViewAdapter(getDataSet());
        mRecyclerView.setAdapter(mAdapter);
        // Code to Add an item with default animation
        //((MyRecyclerViewAdapter) mAdapter).addItem(obj, index);
        // Code to remove an item with default animation
        //((MyRecyclerViewAdapter) mAdapter).deleteItem(index);
    }

    @Override
    protected void onResume() {
        super.onResume();
        ((MyRecyclerViewAdapter) mAdapter).setOnItemClickListener(new MyRecyclerViewAdapter
                .MyClickListener() {
            @Override
            public void onItemClick(int position, View v) {
                Log.i(LOG_TAG, " Clicked on Item " + position);
            }
        });
    }
    private ArrayList<DataObject> getDataSet() {
        ArrayList results = new ArrayList<DataObject>();
        for (int index=0; index <43; index++) {
            DataObject obj = new DataObject("Title " + (index+1),
                    "Sub Title ");
            results.add(index, obj);
        }
        return results;
    }
}

这是MyrecyClerviewAdapter.java

package rachman.a.haditsarbain;
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 MyRecyclerViewAdapter extends RecyclerView
        .Adapter<MyRecyclerViewAdapter
        .DataObjectHolder> {
    private static String LOG_TAG = "MyRecyclerViewAdapter";
    private ArrayList<DataObject> mDataset;
    private static MyClickListener myClickListener;
    public static class DataObjectHolder extends RecyclerView.ViewHolder
            implements View
            .OnClickListener {
        TextView label;
        TextView dateTime;
        public DataObjectHolder(View itemView) {
            super(itemView);
            label = (TextView) itemView.findViewById(R.id.textView);
            dateTime = (TextView) itemView.findViewById(R.id.textView2);
            Log.i(LOG_TAG, "Adding Listener");
            itemView.setOnClickListener(this);
        }
        @Override
        public void onClick(View v) {
            myClickListener.onItemClick(getAdapterPosition(), v);
        }
    }
    public void setOnItemClickListener(MyClickListener myClickListener) {
        this.myClickListener = myClickListener;
    }
    public MyRecyclerViewAdapter(ArrayList<DataObject> myDataset) {
        mDataset = myDataset;
    }
    @Override
    public DataObjectHolder onCreateViewHolder(ViewGroup parent,
                                               int viewType) {
        View view = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.card_view_row, parent, false);
        DataObjectHolder dataObjectHolder = new DataObjectHolder(view);
        return dataObjectHolder;
    }
    @Override
    public void onBindViewHolder(DataObjectHolder holder, int position) {
        holder.label.setText(mDataset.get(position).getmText1());
        holder.dateTime.setText(mDataset.get(position).getmText2());
    }
    public void addItem(DataObject dataObj, int index) {
        mDataset.add(index, dataObj);
        notifyItemInserted(index);
    }
    public void deleteItem(int index) {
        mDataset.remove(index);
        notifyItemRemoved(index);
    }
    @Override
    public int getItemCount() {
        return mDataset.size();
    }
    public interface MyClickListener {
        public void onItemClick(int position, View v);
    }
}

这是我的dataObject.java

package rachman.a.haditsarbain;
public class DataObject {
    private String mText1;
    private String mText2;
    DataObject (String text1, String text2){
        mText1 = text1;
        mText2 = text2;
    }
    public String getmText1() {
        return mText1;
    }
    public void setmText1(String mText1) {
        this.mText1 = mText1;
    }
    public String getmText2() {
        return mText2;
    }
    public void setmText2(String mText2) {
        this.mText2 = mText2;
    }
}

Answer 1

在这里：

DataObject obj = new DataObject("Title " + (index+1), "Sub Title ");

您正在用动态文本创建DataObject("标题1，标题2，标题3等(。但是，您的第二个参数始终是" sub Title"。

我不确定您要设置哪个文本...但是只需更改第二个参数，您将拥有所需的文本。

DataObject obj = new DataObject("Title " + (index+1), "Sub Title " + (index+1));    

Answer 2

检查下面的代码段：

 private ArrayList<DataObject> getDataSet() {
    ArrayList<String> subtitle=new ArrayList<>();
    for(int i=0;i<31;i++){
        subtitle.add(i+1+"/01/2018");
    }
    ArrayList results = new ArrayList<DataObject>();
    for (int index=0; index <31; index++) {
        DataObject obj = new DataObject("Title " + (index+1),
                subtitle.get(index));
        results.add(index, obj);
    }
    return results;
}

我写这本书是为了让您了解如何创建动态字幕。让我知道它是否有帮助。