Activity跳轉&Bundle傳遞資料，androidactivity跳轉

Activity跳轉&Bundle傳遞資料，androidactivity跳轉

Activity的跳轉方式有兩種：

1.startActivity(Intent intent)，直接啟動其他Activity

btnChange = (Button)findViewById(R.id.btnChange);btnChange.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubIntent mIntent = new Intent();mIntent.setClass(MainActivity.this, AnotherActivity.class);startActivity(mIntent);}});

2.startActivityForResult(Intent intent,int requestCode)，以指定的請求碼啟動Activity，並本程式在啟動新Activity後會調用onActivityResult擷取新的Activity傳遞迴來的結果

2.1-Bundle:putExtras(Bundle data)/getExtras()、putExtra(String name,Xxx value)/getXxxExtra(String name)

I.MainActivity中的btn調用startActivityForResult：

btnChange = (Button)findViewById(R.id.btnChange);btnChange.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubIntent mIntent = new Intent(MainActivity.this, AnotherActivity.class);startActivityForResult(mIntent,0);}});

II.MainActivity中重寫onActivityResult監聽返回的資料

@Overridepublic void onActivityResult(int requestCode, int resultCode, Intent intent) {if(requestCode == 1 && resultCode == 1){Bundle data = intent.getExtras();//result為AnotherActivity回傳的key為Name的valueString result = data.getString("Name");}}

III.在AnotherActivity中發送資料

btnSend = (Button) findViewById(R.id.btnSend);btnSend.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {Intent intent = getIntent();intent.putExtra("Name", "John");//設定ResultCodeAnotherActivity.this.setResult(0);AnotherActivity.this.finish();}});