Question

我正在尝试实现parceable将数据传递到下一个屏幕，所以我的家庭活动我正在调用一堆方法（oncreate等）现在我试图从oncreate中创建的查询中获取并传递它在onclick上进入下一个屏幕，但是在onclick之前我想通过告诉parceable来处理它来添加信息...但是我不知道如何将onclick中的信息传递给实现的新类Parceable ......

这是我的代码尝试:(不知道我传递给额外的东西，android网站上缺少文档）

@Override
    public void onClick(View v) {
        if (v == add_new_dictionary) {
            Log.e("clicked add button", "adding the dictionary... ");
            // no return true because it is void on intents
            Intent add_new_dictionary_intent = new Intent(MainActivity.this,
                    add_new_dictionary.class);
            startActivity(add_new_dictionary_intent);

        } else {
            // used to get tag for dictionary
            Object tag = v.getTag();

            //call parceable
            SendIdOfDictionary(tag);

            // start new intent based on the tag -
            Intent new_dictionary_view = new Intent(MainActivity.this,
                    dictionary_view.class);
            new_dictionary_view.putExtra("d_id", WhatAmISupposeToPassInHere);
            startActivity(new_dictionary_view);

        }

        // parceable is faster than serialization - create class to implement it

    }


    private void SendIdOfDictionary(Object tag) {
        class ParceDictionaryData implements Parcelable {
            private String tag;

            /* everything below here is for implementing Parcelable */

            // 99.9% of the time you can just ignore this
            public int describeContents() {
                return 0;
            }

            // write your object's data to the passed-in Parcel
            public void writeToParcel(Parcel out, int flags) {
                out.writeString(tag);
            }

            // this is used to regenerate your object. All Parcelables must have
            // a CREATOR that implements these two methods
            public final Parcelable.Creator<ParceDictionaryData> CREATOR = new Parcelable.Creator<ParceDictionaryData>() {
                public ParceDictionaryData createFromParcel(Parcel in) {
                    return new ParceDictionaryData(in);
                }

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

            // example constructor that takes a Parcel and gives you an object
            // populated with it's values
            private ParceDictionaryData(Parcel in) {
                tag = in.readString();
            }
        }

Answer 1

使用捆绑包，此处不需要Parceable。

将其添加到启动第二个活动的Intent：

Intent i = new Intent();
i.putExtra("tag", yourTag);

然后点击

getIntent（）getExtras（）的getString（ “标签”）;

Answer 2

传递值

public void onClick(View view) {
 //Launching All products Activity
 Intent in = new Intent(getApplicationContext(), ViewMap.class);
// sending address to next activity
in.putExtra("address",strAdd);
// starting new activity and expecting some response back
startActivityForResult(in, 100);
}

并接收值

  Intent i = getIntent();
// getting product id (pid) from intent
Bundle extras = getIntent().getExtras();
if (extras != null) {
adress=extras.getString("address");    
    }

如何将id传递给parcelable？

2 个答案: