关于Android Activity之间传递数据的6种方式

//创建意图对象
 Intent intent = new Intent(this,TwoActivity.class);
 //设置传递键值对
 intent.putExtra("data",str);
 //激活意图
 startActivity(intent);

// 获取意图对象
 Intent intent = getIntent();
 //获取传递的值
 String str = intent.getStringExtra("data");
 //设置值
 tv.setText(str);

//创建意图对象
 Intent intent = new Intent(MainActivity.this,TwoActivity.class);
 //用数据捆传递数据
 Bundle bundle = new Bundle();
 bundle.putString("data",str);
 //把数据捆设置改意图
 intent.putExtra("bun",bundle);
 //激活意图
 startActivity(intent);

//获取Bundle
 Intent intent = getIntent();
 Bundle bundle = intent.getBundleExtra("bun");
 String str = bundle.getString("data");
 tv.setText(str);

  Intent intent = new Intent(MainActivity.this,TwoActivity.class);
  //用一种特殊方式开启Activity
 startActivityForResult(intent,11);
//设置数据
 
protected void onActivityResult(int requestCode,int resultCode,Intent data) {
 super.onActivityResult(requestCode,resultCode,data);
 String str = data.getStringExtra("data");
 tvOne.setText(str);
}

//设置返回的数据
 Intent intent = new Intent();
 intent.putExtra("data",edtOne.getText().toString().trim());
 setResult(3,intent);
 //关闭当前activity
 finish();

SharedPreferences sp = this.getSharedPreferences("info",1);
 //获取sp编辑器
 Editor edit = sp.edit();
 edit.putString("data",str);
 edit.commit();
 //创建意图对象
 Intent intent = new Intent(MainActivity.this,TwoActivity.class);
 //激活意图
 startActivity(intent);

SharedPreferences sp = this.getSharedPreferences("info",1);
 //设置数据
 tv.setText(sp.getString("data",""));

import java.io.Serializable;
class DataBean implements Serializable {
 private String name;
 private String sex;
 public String getName() {
 return name;
 }
 public void setName(String name) {
 this.name = name;
 }
 public String getSex() {
 return sex;
 }
 public void setSex(String sex) {
 this.sex = sex;
 }
}

//创建意图
 Intent intent = new Intent(MainActivity.this,TwoActivity.class);
 DataBean bean = new DataBean();
 //通过set方法把数据保存到DataBean对象中
 bean.setName("啦啦");
 bean.setSex("男");
 intent.putExtra("key",bean);
 startActivity(intent);

Intent intent = getIntent();
 //反序列化数据对象
 Serializable se = intent.getSerializableExtra("key");
 if(se instanceof DataBean){
  //获取到携带数据的DataBean对象db
  DataBean db = (DataBean) se;
  tv.setText(db.getName()+"==="+db.getSex());
 }

Intent intent = new Intent(MainActivity.this,TwoActivity.class);
  TwoActivity.name="牛逼";
  TwoActivity.str="你说";
  startActivity(intent);

//静态变量
protected static String name;
protected static String str;
tv.setText(str+name);