Activity切换
两种方式
>1.直接跳转
Intent intent = new Intent(MainActivity.this,SecondActivity.class); startActivity(intent);
>>需要携带参数则需使用
intent.putExtra("key", "value");
>>目标Activity取参数使用
getIntent().getStringExtra("key")
>2.带返回值跳转
Intent intent = new Intent(MainActivity.this,SecondActivity.class); intent.putExtra("key", "value"); startActivityForResult(intent, 1);
>>目标activity返回
Intent intent = new Intent(); intent.putExtra("code", "OK"); setResult((int)requestCode,intent); finish();
>>>finish()函数 : 执行结束销毁此activity，这个ActivityResult返回回到调用者那里并调用onActivityResult()函数.
>>原activity接受返回值的操作
@Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); //判断操作 if (requestCode==1 && resultCode==2) { mEditText.setText(data.getStringExtra("code")); //Toast.makeText(MainActivity.this, data.getStringExtra("code"), Toast.LENGTH_LONG).show(); } }
原文：http://www.cnblogs.com/tiangao/p/4271111.html