android意圖傳參返回結果（六）

標籤：android意圖傳參返回結果

例如有兩個頁面a，b。a頁面傳參數到b頁面，b頁面將獲得到的參數處理後，再將結果用參數傳回來給頁面a.

1.a頁面的主要MainActivity類的代碼如下：

    private Button button;    private EditText result;    private final static int REQUESTCODE = 1;

    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);                setContentView(R.layout.activity_main);        button = (Button)this.findViewById(R.id.button1);        result = (EditText)this.findViewById(R.id.result);                button.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stub

Intent intent = new Intent(MainActivity.this,OtherActivity.class);intent.putExtra("a", "true");startActivityForResult(intent,REQUESTCODE);}});            }

<pre name="code" class="html">    @Override    protected void onActivityResult(int requestCode,int resultCode,Intent data){    super.onActivityResult(requestCode, resultCode, data);    if(resultCode == 2){    if(requestCode == REQUESTCODE){

                        <span style="font-family: Arial, Helvetica, sans-serif;">String c= intent.getStringExtra("c");</span>    result.setText(c);    }    }    }    

將參數a傳入到b頁面,onActivityResult函數處理將b頁面傳過來的參數c

<span style="font-family: Arial, Helvetica, sans-serif;"></span>

<span style="font-family: Arial, Helvetica, sans-serif;">2.OtherActivity.java函數處理a參數後，將c參數傳入回來給a頁面. 在b頁面的onCreate裡面處理</span>

<span style="font-family: Arial, Helvetica, sans-serif;"></span><pre name="code" class="html">   <pre name="code" class="html">@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stub        Intent intent = getIntent();        String a = intent.getStringExtra("a");        String c;        if(a=="true"){        c = "It is True";        }else{        c = "It is false";        }        Intent newIntent = new Intent();newIntent.putExtra("c", c);setResult(2,intent);finish();}});

android意圖傳參返回結果（六）