Android筆記 Activity切換頁面

如果你做的是需要轉換頁面的程式,整理一下大約有以下幾種,分別是
#純換衣服setContentView
#帶傘出門 (Bundle+startActivity)
#出門不帶傘 (startActivity)
#出門帶傘且記得帶回家 (Bundle+startActivityForResult) 

#純換衣服setContentView(只是原頁轉換layout,非轉換頁面. 不能傳輸資料,須先製作play.xml)
 setContentView(R.layout.play);


#帶傘出門 (傘=Bundle)
Intent (傳值) , 新的Activity  >> startActivity
 PS:新的Activity必須在Manifest裡加上才可以


 <<原頁 KRadio.java>>
 Intent intent = new Intent();
 intent.setClass(KRadio.this, PlayRadio.class);
 Bundle bundle = new Bundle();
 bundle.putString("RadioChannel",textview1.getText().toString());
 intent.putExtras(bundle);
 startActivity(intent);


 <<目的頁 PlayRadio.java>>
 Bundle bundle = this.getIntent().getExtras();
 String str = bundle.getString("RadioChannel");


#出門不帶傘 (不需要Bundle)
 <<原頁 KRadio.java>>
//不傳值三行即可
     Intent intent = new Intent();
     intent.setClass(KRadio.this, Search.class);
     startActivity(intent);
     //finish();    加了finish會關掉Activity按<-就回不了家


 <<目的頁 PlayRadio.java>>
//不傳值就不需要寫接值的code啦


#出門帶傘且記得帶回家 (Bundle+startActivityForResult)
 <<原頁>>
 Intent intent = new Intent();
   intent.setClass(LocationList.this, Search.class);
   Bundle bundle = new Bundle();
   bundle.putString("whereCol",_FIELD);
   bundle.putString("whereVar",paths.get(position).toString());
   intent.putExtras(bundle);
   startActivityForResult(intent,0);
 //原頁要接目的頁原來的值要用onActivityResult
 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data)
 switch (resultCode)
  case RESULT_OK:
   Bundle bunde = data.getExtras();
   String whereCol = bunde.getString("whereCol");
 break;
 <<目的頁>>
 Intent intent;


 intent = this.getIntent();
 Bundle bundle = intent.getExtras();
 String str1 = bundle.getString("whereCol");
 String str2 = bundle.getString("whereVar");
//回傳
 setResult(RESULT_OK, intent);
 finish();




from: http://fan-memo.blogspot.com/2011/03/blog-post.html
http://wangshifuola.blogspot.com/2010/11/androidactivity_18.html