获取activity返回参数

//把startActivity 换成startActivityForResult
//然后重写onActivityResult方法
//—MainActivity
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, TestActivity.class);
intent.putExtra(“user”, new User(“shaomiao”, 2));
//startActivity(intent);
startActivityForResult(intent,0);
}
});

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
text.setText(data.getStringExtra(“data”));
}
/////////////////////////////////////////////////
//通过setResult把参数传回去
–TestActivity
findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent=new Intent();
intent.putExtra(“data”,text.getText().toString());
setResult(1,intent);
//结束TestActivity
finish();
}
});