实验之二 Intent开启activ传数据回父进程_activity 回传对象到父窗口-优快云博客

本文链接：https://blog.youkuaiyun.com/m0_37847767/article/details/80935114

本文通过两个Activity之间的交互示例，展示了如何在Android应用中实现Activity间的数据传递。具体包括使用Intent携带数据从一个Activity跳转到另一个Activity，并在返回时将数据带回。

package com.example.lenovo.testtwo;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

/**
 * Created by lenovo on 2018/7/4.
 */

public class test2 extends Activity {
    private EditText editText;
    private Button button;
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout2);
       initView();
    }
    private void initView()
    {
        button=(Button)findViewById(R.id.button0);
        editText=(EditText)findViewById(R.id.editText0);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent=new Intent();
                intent.putExtra("name",editText.getText().toString());
                setResult(RESULT_OK,intent);//和前面的1有什么关系吗？
                finish();
            }
        });
    }
}//父进程下面是

package com.example.lenovo.testtwo;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.ResultReceiver;
import android.support.annotation.Nullable;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import java.util.Date;



public class test1 extends Activity {
    private Button btn=null;
    private TextView textView=null;
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.ttest);
        initView();
    }
    public void initView()
    {
           btn=(Button)findViewById(R.id.button0);
           btn.setOnClickListener(new View.OnClickListener() {
               public void onClick(View view) {
                   Intent intent=new Intent(test1.this,test2.class);
                   startActivityForResult(intent,1);
           });
           textView=(TextView)findViewById(R.id.textView0);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        switch (requestCode)
        {
            case 1://可是你看嘛
                if(resultCode==RESULT_OK)
                {
                    if (!TextUtils.isEmpty(data.getStringExtra("name"))){
                        textView.setText(data.getStringExtra("name"));
                    }

                }
                break;
        }
    }
}