【移动应用开发技术】Android activity 参数传递

【移动应用开发技术】Androidactivity参数传递

Androidactivity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importandroid.os.Bundle;importandroid.view.Menu;importandroid.view.MenuItem;importandroid.view.View;importandroid.view.View.OnClickListener;importandroid.util.Log;importandroid.widget.Button;importandroid.widget.TextView;importandroid.content.Intent;importandroid.app.Activity;button按钮传递参数：

privateButtonbt;

privateTextViewtw1;

protectedvoidonCreate(BundlesavedInstanceState){

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

bt=(Button)findViewById(R.id.btnBack);

tw1=(TextView)findViewById(R.id.edtRec);

bt.setOnClickListener(newOnClickListener(){

@Override

publicvoidonClick(Viewv){

//TODOAuto-generatedmethodstub

Intentit=newIntent();

//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

protectedvoidonActivityResult(intrequestCode,intresultCode,Intentdata)

{

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activityShowInfo:

privateTextViewtv1;

privateButtonbtnBack;

@Override

protectedvoidonCreate(BundlesavedInstanceState){

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_show_info);

//新页面接收数据

Intentintent=this.getIntent();

Stringname=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(newOnClickListener()

{

@Override

publicvoidonClick(Viewv)

//返回按钮传递参数给主页面

{

Intentintent=newIntent();

intent.putExtra("return",tv1.getText().toString());//传递参数到return

set