将具有多个部分的对象从一个活动传递到另一个活动

Question

嗨，我有一个像人的详细信息的要求，我有像个人，教育，工作一样的多个细节，在第一个活动我输入个人详细信息，然后教育，然后一个接一个这样的工作，我如何才能保持在单一对象和通过应用程序的所有细节，请帮助我。

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Answer 1

请注意，您需要在Intent中绑定一个对象，该对象必须实现Parcelable接口。下面是取自Parcelable documentation的一个常见实现...

public class MyParcelable implements Parcelable {
     private int mData;

     public int describeContents() {
         return 0;
     }

     public void writeToParcel(Parcel out, int flags) {
         out.writeInt(mData);
     }

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

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

     private MyParcelable(Parcel in) {
         mData = in.readInt();
     }
 }

完成后，只需在Intent中传递对象即可。

Intent i = new Intent(getApplicationContext(), ACTIVITY_TO_START.class);
i.putExtra("extra_key", new MyParcelable());
startActivity(i);

要检索启动活动的对象...

Bundle extras = getIntent().getExtras();

if(extras != null && extras.containsKey("extra_key"))
{
    MyParcelable p = (MyParecelable)extras.getParcelable("extra_key");
}

Answer 2

简单的解决方案:使用此的意图

Personal.class

public class Personal extends Activity {

    @Override 
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.personal);

        Intent i = new Intent(getApplicationContext(), Educational.class);
        i.putExtra("personal_details",<-get data from object->);
        startActivity(i);
    } 
}

Educational.class

public class Personal extends Activity {

    @Override 
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.personal);

        String personal_details; 

        Bundle extras = getIntent().getExtras();
        if (extras != null) {
        personal_details= extras.getString("personal_details");
        } 

        Intent i = new Intent(getApplicationContext(), educational.class);
        i.putExtra("personal_details",personal_details);
        i.putExtra("educational_details",<-get data from object->);
        startActivity(i);
    } 
}

Job.class

public class Personal extends Activity {

    @Override 
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.personal);

        String personal_details,educational_details; 

        Bundle extras = getIntent().getExtras();
        if (extras != null) {
        personal_details= extras.getString("personal_details");
        educational_details= extras.getString("educational_details");
        } 

        Intent i = new Intent(getApplicationContext(), FinalResult.class);
        i.putExtra("personal_details",personal_details);
        i.putExtra("educational_details",educational_details);
        i.putExtra("job_details",<-get data from object->);
        startActivity(i);
    } 
}

FinalResult.class

public class Personal extends Activity {

    @Override 
    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.personal);
        String personal_details,educational_details,job_details; 

        Bundle extras = getIntent().getExtras();
        if (extras != null) {
        personal_details= extras.getString("personal_details");
        educational_details= extras.getString("educational_details");
        job_details= extras.getString("job_details");
        } 
    } 
}

{编辑-1}

看一下我在

• You中的一个答案
• 可以使用application variable或shared preferences实现它，但我不推荐它。！
• 尝试将其存储在POJO(普通老JAVA类)

中

{编辑-2}

嗯，如果我正确理解了您的问题：：您已连接到互联网(无线、有线、...等)基本上，当没有网络连接时，您正在尝试显示一个对话框！你可以借助Broadcast receivers ..。

尝试此命令：：将广播接收器设置为在没有网络连接时触发意图...编写代码来捕获该意图并弹出dialog ...在此对话框中，为用户提供重新连接连接的选项！