Android(安卓)activity 参数传递

Android activity 参数传递经过网上的资料收集终于测试成功，可以两个Activity 之间相互传递参数。先将部分代码帖出来(关键代码已注释)，仅供参考。

第一个activity:activity_main

导入相关包

import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.util.Log;
import android.widget.Button;
import android.widget.TextView;
import android.content.Intent;
import android.app.Activity;

button 按钮传递参数：

private Button bt;
private TextView tw1;

protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);
       bt=(Button)findViewById(R.id.btnBack);
       tw1=(TextView)findViewById(R.id.edtRec);
       bt.setOnClickListener(new OnClickListener() {
           @Override
           public void onClick(View v) {
               // TODO Auto-generated method stub
               Intent it= new Intent();
               //传递参数
               it.putExtra("name", tw1.getText().toString());
               it.setClass(MainActivity.this, ShowInfo.class);
              // startActivity(it); //不接收返回值
               startActivityForResult(it, 1); //接收返回值这里参数必须>0 否则onActivityResult无法执行

             // MainActivity.this.finish(); //终止Activity

           }
       });
    }

接收返回参数：前面的按钮必须设置为startActivityForResult(it, 1); //接收返回值

   /**
     * 接收带有返回值的Activity方法
     */
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data)
    {

        super.onActivityResult(requestCode, resultCode, data);
        Log.i("Main", "requestCode:"+requestCode+"resultCode:"+resultCode);
         //这里 requestCode=1,resultCode=-1
        if(requestCode == 1){
           tw1.setText(data.getStringExtra("return"));
        }
      // tw1.setText(data.getStringExtra("return"));

    }

第二个activity ShowInfo:

    private TextView tv1;
   private Button btnBack;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_show_info);
       //新页面接收数据

        Intent intent=this.getIntent();
       String name=intent.getStringExtra("name");
        Log.i("获取到的name值为",name);
        tv1 = (TextView)findViewById( R.id.edtRec );
        tv1.setText("传过来的值为:"+name);

        btnBack=(Button)findViewById(R.id.btnBack);//定义返回按钮
        btnBack.setOnClickListener(new OnClickListener()
            {

                @Override
                public void onClick(View v) //返回按钮传递参数给主页面
                {
                    Intent intent=new Intent();
                    intent.putExtra("return", tv1.getText().toString()); //传递参数到return
                    setResult(RESULT_OK, intent);
                    finish(); //关闭当前activity

                }
            });

   }

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