数据传递

//单条传送

A传

Intentintent=newIntent(A.this,B.class);

Bundlebundle=newBundle();bundle.putString("cid",cid);//要传递的数据intent.putExtras(bundle);

startActivity(intent);

B接

Stringcid=this.getIntent().getExtras().getString("cid");

//listview中item传送信息

Intentintent=newIntent(A.this,B.class);bean=listB.get(position);//传递实体类，某一值intent.putExtra("Age",bean.getAge());startActivity(intent);

Intentintent=getIntent();StringAge=intent.getStringExtra("Age");

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//userId保存在userinfo中

SharedPreferencessp=getSharedPreferences("userinfo",0);SharedPreferences.Editoreditor=sp.edit();editor.putString("userId",userId);editor.commit();

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//userId从userinfo中取出

SharedPreferencesshare=getSharedPreferences("userinfo",0);StringuserId=share.getString("userId","");