Android 數據傳輸

多個activity之間進行數據傳輸目前我知道的有兩種一種是intent.putExtra("鍵",值);另一種是intent.putExtras(Bundle);

第一種是直接用intent來當點擊某個按鈕時跳轉

Intent intent=new Intent(MainActivity.this,SecondActivity.class);
intent.putExtra("Schoolname","wfu");
startActivity(intent);

然後在第二個activity中讀取數據

Intent intent=getIntent();
String schoolname=intent.getStringExtra("Schoolname");

第二種就是需要加個Bundle來綁定數據

Intent intent=new Intent(MainActivity.this,SecondActivity.class);
Bundle bundle=new Bundle();
bundle.putString("schoolname","wfu");
bundle.putString("classname","java");
bundle.putInt("age",20);
intent.putExtras(bundle);
startActivity(intent);

讀取

Intent intent=getIntent();
Bundle bundle=intent.getExtras();
String schoolname=bundle.getString("schoolname");
String classname=bundle.getString("classname");
int age=bundle.getInt("age");