1.傳遞數(shù)據(jù)
eg:FirstActivity向SecondActivity傳遞數(shù)據(jù)

• FirstActivity主方法中

String data="hello kike";
Intent intent=new Intent(FirstActivity.this,SecondActivity.class);
intent.putExtra("extra_data",data);
startActivity(intent);

• SecondActivity主方法中

Intent intent=getIntent();
String str=intent.getStringExtra("extra_data");
Log.i("info","str="+str);
//如果返回Int類型的intent.getIntExtra("data",data);(如果沒有返回的就返回data)