单击网格视图时如何将 arralist(position) 发送到另一个活动 [英] When clicked on grid view how to send arralist(position) to another actvity

问题描述

在这个方法中，我收到了 ArrayList

In this method I am receiving the ArrayList

        OkHttpHandler handler = new OkHttpHandler(MainActivity.this,new OkHttpHandler.MyInterface() {
            @Override
            public void myMethod(ArrayList result) {
                                  Toast.makeText(MainActivity.this, "Connection Succesful",
                            Toast.LENGTH_LONG).show();

  GridViewAdapter adapter = new GridViewAdapter(getApplicationContext(), R.layout.grid_item_layout, result);

我想要的是将此数组列表发送到 gridiview 中的另一个活动.当用户单击 gridview 中的图像时，我想将此图像在 ArrayList 中发送到下一个活动. 如何做到这一点>

what I want is to send this arraylist to another activity in the gridiview. When the user clicks on the image in gridview, I want to send this image in ArrayList to next activity. How to do that>

这是网格视图

holder.imageView.setOnClickListener(new View.OnClickListener() {

    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        Log.d("OnImageButton", "Clicked");
        Intent intnt  =new Intent(mcontext, SingleViewActivity.class);
       //intnt.putExtra("Contact_list", item);
        mcontext.startActivity(intnt)  ; //This line raises error
        Toast.makeText(mcontext, "intent",
                Toast.LENGTH_LONG).show();
    }
});

我尝试了 parcable，但它没有用，因为我只想将数据发送到另一个活动，我不想开始新的活动

I tried parcable, but it didn't work because I only want to send the data to another activity, I don't to start a new activity

这是我试过的

 Listitem = new ArrayList<Listitem>();
            for(int i=0;i<peoples.length();i++){
                JSONObject c = peoples.getJSONObject(i);
              //  String id ="2";
                String id=  c.getString("ID");
                String url = c.getString("URL");
                Log.d("Id: ", id);
                int intid = 0;
              Student student = new Student(c.getString("ID"),
                      "hhe",
                        c.getString("URL")
                       );
                Intent intent = new Intent(mContext,SingleViewActivity.class);

                // Passing data as a parecelable object to StudentViewActivity
                intent.putExtra("student",student);

                // Opening the activity
                mContext.startActivity(intent);

在这个方法中，我将 ArrayList 传递给另一个活动

In this method, I am passing ArrayList to another activity

try {

        JSONObject jsonObj = new JSONObject(myJSON);
        peoples = jsonObj.getJSONArray("result");
        System.out.println(peoples.length());

        Listitem = new ArrayList<Listitem>();
        for(int i=0;i<peoples.length();i++){
            JSONObject c = peoples.getJSONObject(i);
            String id=  c.getString("ID");
            String url = c.getString("URL");
            Log.d("Id: ", id);
            int intid = 0;
            try {
                intid = Integer.parseInt(id.toString());
            } catch(NumberFormatException nfe) {
                System.out.println("Could not parse " + nfe);
            }
            DatabaseHandler db = new DatabaseHandler(mContext);
            Log.d("Insert: ", "Inserting ..");

              db.addObjects(new Objects(intid,"Image1", url, "IMAGES", "Funny"));

            Listitem.add(new Listitem(id,url));
            Log.e("d", "ppppp");
            System.out.println(Listitem);
        }
        if (mListener != null)
              mListener.myMethod(Listitem);

推荐答案

请参考我下面的示例代码，将一个数组列表发送到另一个活动，然后您就可以将其逻辑用于您的应用程序.希望这会有所帮助！

Please refer to my following sample code for sending an arraylist to another activity, then you can use its logic to your app. Hope this helps!

首先，你需要一个实现 Parcelable 的类

First of all, you need a class that implements Parcelable

public class Person implements Parcelable {
    int id;
    String name;
    int age;

    Person (Parcel in){
        this.id = in.readInt();
        this.name = in.readString();
        this.age = in.readInt();
    }

    Person(int id, String name, int age) {
        this.id = id;
        this.name = name;
        this.age = age;
    }

    @Override
    public int describeContents() {
        return 0;
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeInt(this.id);
        dest.writeString(this.name);
        dest.writeInt(this.age);
    }

    public static final Parcelable.Creator<Person> CREATOR = new Parcelable.Creator<Person>() {
        public Person createFromParcel(Parcel in) {
            return new Person(in);
        }

        public Person[] newArray(int size) {
            return new Person[size];
        }
    };
}

然后在 MainActivity 中:

Then in MainActivity:

public class MainActivity extends AppCompatActivity {

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

        ArrayList<Person> personArrayList = new ArrayList<>();
        personArrayList.add(new Person(1, "Person A", 20));
        personArrayList.add(new Person(2, "Person B", 30));
        personArrayList.add(new Person(3, "Person C", 40));

        Intent intent = new Intent(this,PersonsActivity.class);
        intent.putExtra("Person_List", personArrayList);
        startActivity(intent);
    }
}

人物活动:

public class PersonsActivity extends AppCompatActivity {

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

        Bundle bundle = getIntent().getExtras();

        ArrayList<Person> personArrayList = bundle.getParcelableArrayList("Person_List");

        if (personArrayList != null && !personArrayList.isEmpty()) {
            for (Person person : personArrayList) {
                Log.i("PersonsActivity", String.valueOf(person.id) + " | " + person.name + " | " + String.valueOf(person.age));
            }
        }
    }
}

您将获得以下日志:

11-23 15:40:37.107 4051-4051/? I/PersonsActivity: 1 | Person A | 20
11-23 15:40:37.107 4051-4051/? I/PersonsActivity: 2 | Person B | 30
11-23 15:40:37.107 4051-4051/? I/PersonsActivity: 3 | Person C | 40

这篇关于单击网格视图时如何将 arralist(position) 发送到另一个活动的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！