Java 自定义适配器中的意图

您好，我需要在onClick中添加Intent，在适配器中添加Intent以连接我的Arraylist，并在listview中传递不同项的different链接。下面是我的代码，我需要做哪些更改？如何将Intent与适配器连接，以及需要使用哪些命令

 package com.example.android.extremebiceps;

import android.app.Activity;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;



public class Workout extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_workout);

        //kreirenje arraja
        final ArrayList<Word> workouts = new ArrayList<Word>();
        workouts.add(new Word("workout1",R.layout.activity_main));
        workouts.add(new Word("workout2",R.layout.activity_main));
        workouts.add(new Word("workout3",R.layout.activity_main));
        workouts.add(new Word("workout4",R.layout.activity_main));
        workouts.add(new Word("workout5",R.layout.activity_main));




        // kreiranje variable za pracenje trenutne pozicije


        WordAdapter adapter=new WordAdapter(this,workouts);


        ListView listView = (ListView) findViewById(R.id.list);

        listView.setAdapter(adapter);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long l) {

                Word word = workouts.get(position);


            }
        });

    }
}

当我试图在我的监听器中添加Toast时，它不起作用；

listView.setAdapter(adapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long l) {
        Word word = workouts.get(position);
        Intent in = new Intent(Workout.this, NextActivity.class);
        in.putExtra("Word", wokouts.get(position).yourMethod());
        startActivity(in);

     }
});

setOnItemClickListener（新的AdapterView.OnItemClickListener（）{ @凌驾 public void onItemClick（AdapterView父视图、视图视图、整型位置、长l）{ Word=训练。获取（位置）； Intent in=新的Intent（锻炼。本次，下一次触觉。课堂）； in.putExtra（“Word”，wokouts.get（position.yourMethod（））； 星触觉（in）； } });

我强烈推荐使用recyclerView。请阅读以下内容：

对于您的问题，请执行以下操作：

训练班：

package com.example.android.extremebiceps;

import android.app.Activity;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;



public class Workout extends AppCompatActivity {

    public interface WorkoutCallBack{  //ADD this callback that ill announce your workout class that the button was pressed
        void onButtonPressed(String field);  //insted of string put whatever field you want to alter you intent
    }

        @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_workout);

        //kreirenje arraja
        final ArrayList<Word> workouts = new ArrayList<Word>();
        workouts.add(new Word("workout1",R.layout.activity_main));
        workouts.add(new Word("workout2",R.layout.activity_main));
        workouts.add(new Word("workout3",R.layout.activity_main));
        workouts.add(new Word("workout4",R.layout.activity_main));
        workouts.add(new Word("workout5",R.layout.activity_main));




        // kreiranje variable za pracenje trenutne pozicije

        //add the workoutCallBack as a parameter in the adapter
        WordAdapter adapter=new WordAdapter(this,workouts, new WorkoutCallBack{

            @Override
            public void onButtonPressed(string field){

                //here test your field and give the propper intent
                if(field.equals("x")){
                    //first intent
                }else if(field.equals("y")){
                    //second intent, etc
                }
            }
        });


        ListView listView = (ListView) findViewById(R.id.list);

        listView.setAdapter(adapter);


    }
}

package com.example.android.extremebiceps；
导入android.app.Activity；
导入android.content.Intent；
导入android.support.v7.app.AppActivity；
导入android.os.Bundle；
导入android.view.view；
导入android.widget.AdapterView；
导入android.widget.ArrayAdapter；
导入android.widget.LinearLayout；
导入android.widget.ListView；
导入android.widget.TextView；
导入android.widget.Toast；
导入java.util.ArrayList；
公共课锻炼扩展了体育活动{
公共接口WorkoutCallBack{//添加此回调，我将通知您的训练课程按钮已按下
void onButtonPressed（String字段）；//不使用String，而使用您想要改变意图的任何字段
}
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity\U训练）；
//克雷恩杰·阿拉贾
最终ArrayList训练=新建ArrayList（）；
增加（新词（“workout1”，R.layout.activity_main））；
增加（新词（“workout2”，R.layout.activity_main））；
增加（新词（“workout3”，R.layout.activity_main））；
增加（新词（“workout4”，R.layout.activity_main））；
增加（新词（“workout5”，R.layout.activity_main））；
//克雷兰杰·普拉切尼·特努特·波齐齐耶
//将workoutCallBack作为参数添加到适配器中
WordAdapter=新WordAdapter（此，训练，新训练回调{
@凌驾
已按下公用void on按钮（字符串字段）{
//在这里测试你的领域，并给出支持者的意图
if（字段等于（“x”））{
//初衷
}else if（字段等于（“y”））{
//第二意图等
}
}
});
ListView ListView=（ListView）findViewById（R.id.list）；
setAdapter（适配器）；
}
}

现在，适配器

package com.example.android.extremebiceps;

import android.app.Activity;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.TextView;

import java.util.ArrayList;

public class WordAdapter extends ArrayAdapter<Word> {

    private WorkoutCallBack workoutCallBack; //local variable of the callback

    public WordAdapter(Activity context, ArrayList<Word> Workouts, WorkoutCallBack workoutCallBack) {//add the callback in the parameters of the adapter
        // Here, we initialize the ArrayAdapter's internal storage for the context and the list.
        // the second argument is used when the ArrayAdapter is populating a single TextView.
        // Because this is a custom adapter for two TextViews and an ImageView, the adapter is not
        // going to use this second argument, so it can be any value. Here, we used 0.
        this.workoutCallBack=workoutCallBack; //save the callback in the local variable
        super(context, 0, Workouts);
    }
    @NonNull
    @Override
    public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
        // Check if the existing view is being reused, otherwise inflate the view
        View listItemView = convertView;
        if (listItemView == null) {
            listItemView = LayoutInflater.from(getContext()).inflate(
                    R.layout.list_item, parent, false);
        }
        Word currentWord = getItem(position);

        //nadzi button
        Button buttonView = (Button) listItemView.findViewById(R.id.Button1);
        //uzmi tekst iz buttona
        buttonView.setText(currentWord.getDefaultButton());

        //add click listener to the button
        buttonView.setOnClickListener(new View.OnClickListener{
            @Override
            public void onClick(View v) {
                workoutCallBack.onButtonClicked(currentWord. getDefaultButton())
            }
        });


        return listItemView;
}

package com.example.android.extremebiceps；
导入android.app.Activity；
导入android.support.annotation.NonNull；
导入android.support.annotation.Nullable；
导入android.view.LayoutInflater；
导入android.view.view；
导入android.view.ViewGroup；
导入android.widget.ArrayAdapter；
导入android.widget.Button；
导入android.widget.TextView；
导入java.util.ArrayList；
公共类WordAdapter扩展了ArrayAdapter{
private WorkoutCallBack WorkoutCallBack；//回调的局部变量
public WordAdapter（活动上下文、ArrayList训练、WorkoutCallBack WorkoutCallBack）{//在适配器的参数中添加回调
//这里，我们为上下文和列表初始化ArrayAdapter的内部存储。
//第二个参数在ArrayAdapter填充单个TextView时使用。
//因为这是两个TextView和一个ImageView的自定义适配器，所以适配器不是
//我们将使用第二个参数，所以它可以是任何值。
this.workoutCallBack=workoutCallBack；//将回调保存在局部变量中
超级（上下文、0、训练）；
}
@非空
@凌驾
公共视图getView（int位置，@Nullable视图convertView，@NonNull视图组父级）{
//检查现有视图是否正在重新使用，否则会膨胀视图
View listItemView=convertView；
如果（listItemView==null）{
listItemView=LayoutFlater.from（getContext（））.inflate(
R.layout.list_项，父项，false）；
}
Word currentWord=getItem（位置）；
//纳兹按钮
Button buttonView=（Button）listItemView.findViewById（R.id.Button1）；
//uzmi tekst iz buttona
buttonView.setText（currentWord.getDefaultButton（））；
//将click listener添加到按钮
buttonView.setOnClickListener（新视图.OnClickListener{
@凌驾
公共void onClick（视图v）{
workoutCallBack.onButtonClicked（currentWord.getDefaultButton（））
}
});
返回listItemView；
}

发布你的适配器，我会给你一个完整的snipet我刚刚发布了完整的snipet，所以请帮助：你想在适配器的按钮视图上设置点击侦听器吗？问题2，你想基于什么？我想基于word类中的字段？是的，可能吗？以及2.是word类中的字段或我需要吗我的问题是：我可以在我的ArayStuding训练中添加不同的意图吗？添加，就像我对字符串所做的那样…所以当我的第一个按钮调用intent1时，第二个按钮调用calintent2时，等等？

package com.example.android.extremebiceps;

import android.app.Activity;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;



public class Workout extends AppCompatActivity {

    public interface WorkoutCallBack{  //ADD this callback that ill announce your workout class that the button was pressed
        void onButtonPressed(String field);  //insted of string put whatever field you want to alter you intent
    }

        @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_workout);

        //kreirenje arraja
        final ArrayList<Word> workouts = new ArrayList<Word>();
        workouts.add(new Word("workout1",R.layout.activity_main));
        workouts.add(new Word("workout2",R.layout.activity_main));
        workouts.add(new Word("workout3",R.layout.activity_main));
        workouts.add(new Word("workout4",R.layout.activity_main));
        workouts.add(new Word("workout5",R.layout.activity_main));




        // kreiranje variable za pracenje trenutne pozicije

        //add the workoutCallBack as a parameter in the adapter
        WordAdapter adapter=new WordAdapter(this,workouts, new WorkoutCallBack{

            @Override
            public void onButtonPressed(string field){

                //here test your field and give the propper intent
                if(field.equals("x")){
                    //first intent
                }else if(field.equals("y")){
                    //second intent, etc
                }
            }
        });


        ListView listView = (ListView) findViewById(R.id.list);

        listView.setAdapter(adapter);


    }
}

package com.example.android.extremebiceps;

import android.app.Activity;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.TextView;

import java.util.ArrayList;

public class WordAdapter extends ArrayAdapter<Word> {

    private WorkoutCallBack workoutCallBack; //local variable of the callback

    public WordAdapter(Activity context, ArrayList<Word> Workouts, WorkoutCallBack workoutCallBack) {//add the callback in the parameters of the adapter
        // Here, we initialize the ArrayAdapter's internal storage for the context and the list.
        // the second argument is used when the ArrayAdapter is populating a single TextView.
        // Because this is a custom adapter for two TextViews and an ImageView, the adapter is not
        // going to use this second argument, so it can be any value. Here, we used 0.
        this.workoutCallBack=workoutCallBack; //save the callback in the local variable
        super(context, 0, Workouts);
    }
    @NonNull
    @Override
    public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
        // Check if the existing view is being reused, otherwise inflate the view
        View listItemView = convertView;
        if (listItemView == null) {
            listItemView = LayoutInflater.from(getContext()).inflate(
                    R.layout.list_item, parent, false);
        }
        Word currentWord = getItem(position);

        //nadzi button
        Button buttonView = (Button) listItemView.findViewById(R.id.Button1);
        //uzmi tekst iz buttona
        buttonView.setText(currentWord.getDefaultButton());

        //add click listener to the button
        buttonView.setOnClickListener(new View.OnClickListener{
            @Override
            public void onClick(View v) {
                workoutCallBack.onButtonClicked(currentWord. getDefaultButton())
            }
        });


        return listItemView;
}