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);