Androidx学习笔记（50）--- Activity在跳转时携带数据

Activity跳转时的数据传递

Activity通过Intent启动时，可以通过Intent对象携带数据到目标Activity

Intent intent = new Intent(this, SecondActivity.class);
intent.putExtra("maleName", maleName);
intent.putExtra("femaleName", femaleName);
startActivity(intent);

在目标Activity中取出数据

Intent intent = getIntent();
String maleName = intent.getStringExtra("maleName");
String femaleName = intent.getStringExtra("femaleName");

发送数据

public void click(View v){

Intent intent = new Intent(this, SecondActivity.class);

//把数据封装至intent对象中

//intent.putExtra("malename", "李志");

//intent.putExtra("femalename", "芙蓉姐姐");

//把数据封装至bundle对象中

Bundle bundle = new Bundle();

bundle.putString("malename", "李志");

bundle.putString("femalename", "芙蓉姐姐");

//把bundle对象封装至intent对象中

intent.putExtras(bundle);

startActivity(intent);

}

获取数据

Intent intent = getIntent();

//从intent对象中把封装好的数据取出来

//String maleName = intent.getStringExtra("malename");

//String feMaleName = intent.getStringExtra("femalename");

Bundle bundle = intent.getExtras();

String maleName = bundle.getString("malename");

String feMaleName = bundle.getString("femalename");

Random rd = new Random();

int yinyuan = rd.nextInt(100);

TextView tv = (TextView) findViewById(R.id.tv);

tv.setText(maleName + "和" + feMaleName + "的姻缘值为" + yinyuan);