Android Activity之間進行參數傳遞的三種方式

1.使用Intent進行傳輸

    //發送數據的Activity

    class button implements OnClickListener{

        @Override

        public void onClick(View v) {

            // TODO Auto-generated method stub

            String ET_1String = ET_1.getText().toString();          //得到文本輸入框中的文本

            String ET_2String = ET_2.getText().toString();

            Intent intent = new Intent();

            intent.putExtra("one",ET_1String);                      //進行參數的傳遞（“參數名字”，參數）

            intent.putExtra("two",ET_2String);

            intent.setClass(MainActivity.this, result.class);

            MainActivity.this.startActivity(intent);

        }

    }


//接收數據的Activity  
  public class result extends Activity{  
private TextView resulTextView;                           
@Override  
protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.result);  
        resulTextView = (TextView)findViewById(R.id.TV_1);  
        Intent intent = getIntent();                        //定義接收數據的Intent  
        String oneString = intent.getStringExtra("one");  
        String twoString = intent.getStringExtra("two");  
        int a = Integer.parseInt(oneString);                //進行計算之前要進行強制類型轉換  
        int b = Integer.parseInt(twoString);  
        int c = a * b;  
        resulTextView.setText(c + "");                      //要加一個空字符對int類型進行強制類型轉換  
    }  
}  </pre> 



 2.使用靜態變量進行傳遞 

    1.主界面(發送數據的Activity)


class ButtonListener implements android.view.View.OnClickListener{  
        @Override  
        public void onClick(View arg0) {  
            // TODO Auto-generated method stub  
            Intent intent = new Intent();  
            intent.setClass(MainActivity.this, OtherActivity.class);  
            OtherActivity.nameString = "zhao";  
            startActivity(intent);  
        }  
    }  

2.接受數據Activity  

    public class OtherActivity extends Activity{  
    //定義靜態變量  
    public static String nameString;  

    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.otheractivity);  
        System.out.println("nameString-------->"+nameString);  
    }  
}  </pre> 



 3.利用setResult進行數據傳輸 

    //1.要關閉的頁面

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.otheractivity);

        Intent intent = this.getIntent();

        intent.putExtra("tel", 12345);

        //設置requestCode和帶有數據的intent對象

        OtherActivity.this.setResult(3, intent);

        //馬上關閉Activity

        this.finish();

    }


//2.上面的頁面關閉時，此頁面進行數據的接收  
class ButtonListener implements android.view.View.OnClickListener{  
    @Override  
    public void onClick(View arg0) {  
        Intent intent = new Intent();  
        intent.setClass(MainActivity.this, OtherActivity.class);  
        //與普通的start方法不同，需要設置requestCode  
        startActivityForResult(intent, 1);  
    }  
}  

//如果要進行此操作，需要在數據接收頁面中復寫activity的onActivityResul()方法  
@Override  
protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
    super.onActivityResult(requestCode, resultCode, data);  
    int tel = 0;  
    //根據返回碼resultCode來判斷下一步進行的業務代碼  
    if(resultCode==3){  
        tel = data.getIntExtra("tel", 0);  
    }  
    Log.i(TAG, "tel--------->"+String.valueOf(tel));  
}  </pre>