Question

我使用JSON从Web服务器获取数据项标题和描述。我知道如何解析它，使用自定义适配器并仅使用标题填充列表视图..我希望它打开一个新活动并显示所单击项目的标题和描述。我是否必须创建一个新的自定义适配器来填充此列表视图？我应该从活动的这一方面传递什么，如何在另一方面收到它？提前谢谢。

 displayTitleAdapter = new DisplayTitleAdapter(this, R.layout.rowlayout);
    listView = (ListView)findViewById(R.id.listviewfinal);
    listView.setAdapter(displayTitleAdapter);
    listView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

        }
    });

这是我的Adapter类'getView方法

public View getView(int position,  View convertView,  ViewGroup parent) {
    View row;
    row = convertView;
    ReqHolder reqHolder;
    if(row == null){
        LayoutInflater layoutInflate = (LayoutInflater) this.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        row = layoutInflate.inflate(R.layout.rowlayout, parent, false);
        reqHolder = new ReqHolder();

        reqHolder.Title = (TextView)row.findViewById(R.id.title_title);
        reqHolder.Requirement = (TextView)row.findViewById(R.id.req_req);

        row.setTag(reqHolder);
    }
    else{
        reqHolder = (ReqHolder)row.getTag();
    }
    //Requirements is the model class with getter and setter methods for Fields Title and Requirement.
    Requirements requirements = (Requirements) this.getItem(position);
    reqHolder.Title.setText(requirements.getTitle());
    reqHolder.Requirement.setText(requirements.getRequirement());
    return row;
}

static class ReqHolder{
    TextView Title;
     TextView Requirement;
}

}

Answer 1

以下是我为我做的，请确保你的模态类实现了Serializable。

MainActivity：

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            Intent i = new Intent(getApplicationContext(),Main2Activity.class);
            i.putExtra("Question",questionArrayList.get(position));
            startActivity(i);
        }
    });

在我的主要活动中，我在listview上设置了一个on item click侦听器，然后使用intent类启动一个活动。

在我的下一堂课中，我得到了我投入意图（问题）的对象，并显示了我想要使用模态类中的getter和setter的文本

活力2：

public class Main2Activity extends AppCompatActivity {
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activitiy_main2);
    Question q = (Question) getIntent().getSerializableExtra("Question");

    TextView yourAnswer= (TextView)findViewById(R.id.title);
    TextView correctAnswer = (TextView)findViewById(R.id.description);

    yourAnswer.setText(q.getYourAnswer());
    correctAnswer.setText(q.getCorrectAnswer());
}
}

希望这能帮到你！

Answer 2

这很好用：

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                Object o = listView.getItemAtPosition(position);
                UserConnected str=(UserConnected) o;//As you are using Default String Adapter
                Toast.makeText(getBaseContext(),str.getPrenom(), Toast.LENGTH_SHORT).show();
            }
        });

在Listview android上单击Title项时获取标题和描述

2 个答案: