Intent传输数据-3

1.显式intent

Intent intent = new Intent(this,second.class);intent.putExtra("data");startActivity(intent);Intent intent = getIntent();String data = intent.getStringExtra("data");推荐写法：second：public static void actionStart(Context context, String data1, String data2) ｛    Intent intent = new Intent(context,second.class);    intent.putExtra("param1", data1);    intent.putExtra("param2", data2);    context.startActivity(intent);｝first：second.actionStart(this,"data1","data2");

2.startAcivityForResult

First:Intent intent = new Intent(this,second.class);startAcivityForResult(intent, 1); @Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {        switch (requestCode) {            case 1:                if (resultCode == RESULT_OK) {                    String returnedData = data.getStringExtra("data_return");                    Log.d("FirstActivity", returnedData);                }                break;            default:        }    }second:Intent intent = new Intent();intent.putExtra("data_return","hello first");setResult(RESULT_OK,intent);finish();@Overridepublic void onBackPressed() {//back键退出特殊情况        Intent intent = new Intent();        intent.putExtra("data_return", "hello first");        setResult(RESULT_OK, intent);        finish();    }