将编辑文本的文本通过一个意图移动到另一个活动是抛出异常

Question

我正在尝试在我的android应用程序中实现搜索功能，我想从activity discover中获取用户在搜索编辑文本中所写的内容，并打开一个名为activity search的新活动，在其中可以显示结果，post object是我实现的一个类，我在其中从后端获取数据每次尝试都会抛出异常这是我的代码，用于此部分的"活动发现"`

search.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {
            }
        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {
        }
        @Override
        public void afterTextChanged(Editable s) {
            // setContentView(R.layout.search_grid);
            // gridView2 = (GridView) findViewById(R.id.search_grid);
            RequestParams rp = new RequestParams();
            final String url;
            if (people.isChecked()) {
                rp.add("user", search.getText().toString());
                rp.add("counter", "");
                url = "search_users";
            } else if (tags.isChecked()) {
                rp.add("tag", search.getText().toString());
                rp.add("counter", "");
                url = "search_exact_hashtag";
            } else {
                rp.add("location", search.getText().toString());
                rp.add("counter", "");
                url = "search_location";
            }
            final ArrayList<PostObject> addyExtras = new ArrayList<>();
            //Toast.makeText(getApplicationContext()," something " + , Toast.LENGTH_SHORT).show();
            PabloClient.post(url, rp, new JSONHandler(getApplicationContext(), new JSONHandler.OnFinishedListener() {
                @Override
                public void OnFinished(int statusCode, Header[] headers, JSONObject response, int result) {
                    try {
                        if (result == 1) {
                            // Toast.makeText(getApplicationContext(), response.toString(), Toast.LENGTH_SHORT).show();
                            JSONArray posts = response.getJSONArray("data");
                            setContentView(R.layout.search_grid);
                            //////////////////////////////////////////////

                            //////////////////////////////////////////////////////////////////
                            for (int i = 0; i < posts.length(); i++) {
                                searchPosts.add(new PostObject(posts.getJSONObject(i)));

                                addyExtras.add(searchPosts.get(i));
                            }


                        }
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                    Intent intent = new Intent(ActivityDiscover.this, ActivitySearch.class);
                    intent.putParcelableArrayListExtra("mylist", addyExtras);
                    startActivity(intent);
                }
            }));
        }
    });

`

这里是我如何在搜索活动中获得意图

searchPosts2 = getIntent().getParcelableArrayExtra("mylist");

Answer 1

数组应该在Bundle的帮助下通过

发送阵列

从发送方开始，首先需要在捆绑中添加阵列列表

Bundle data = new Bundle();
data.putParcelableArrayList("mylist", addyExtras);

然后将捆绑包添加到Intent

 Intent intent = new Intent(ActivityDiscover.this, ActivitySearch.class);
    intent .putExtra("content", data);
    startActivity(yourIntent);

Retrive Array

接收端从意向获取捆绑包

Bundle data =  getIntent().getBundleExtra("content");

然后从捆绑中获取数组列表

searchPosts2  =  data.getParcelableArrayList("mylist");

Answer 2

在PostObject类中执行以下操作。。。。

   public class PostObject implements Parcelable 
   {
      ///......your class code

@Override
public int describeContents() {
    return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
}
public PostObject(Parcel in) {
    super();
//    readFromParcel(in);
}
public static final Parcelable.Creator<PostObject> CREATOR = new Parcelable.Creator<PostObject>() {
    public PostObject createFromParcel(Parcel in) {
        return new PostObject(in);
    }
    public PostObject[] newArray(int size) {
        return new PostObject[size];
    }
};
}