如何獲取調用活動的名稱？

Question

我想檢索調用活動的名稱以檢查某些條件。將有什麼解決方案？

Answer 1

可以使用Bundle

看一看這個例子發送活動之間的數據： http://www.balistupa.com/blog/2009/08/passing-data-or-parameter-to-another-activity-android/

基本上你需要把主叫方的名稱作爲參數：

Bundle bundle = new Bundle(); 
bundle.putString(this.class.getName(), 「ClassName」); 

Intent newIntent = new Intent(this.getApplicationContext(), ActivityClass2.class); 
newIntent.putExtras(bundle); 
startActivityForResult(newIntent, 0); 

而且在ActivityClass2中，您可以使用以下參數讀取該參數：

Bundle bundle = this.getIntent().getExtras(); 
String className = bundle.getString(「ClassName″); 

Answer 2

我想你甚至可以 getCallingActivity().getClassName()

Answer 3

第一步實現這一目標： 創建界面 - >右鍵你的項目 - >新建 - > JavaClass->類=接口

public interface ActivityConstants { 
    public static final int NameFromTheFirstActivity = 1001; 
    public static final int NameFromTheSecondActivity = 1002; 
    public static final int NameFromTheThirdActivity = 1003; 
} 

第二步： 進入每個活動（活動1或活動2或活動3）當你建立你的意圖調用ActivityFromWhereYouWantChooseTheAction（稱爲ActivityChooseAction），你需要把一個額外像... 到Activity1中寫下：

Intent intent = new Intent(getApplicationContext(), ActivityChooseAction.class); 
        intent.putExtra("calling-activity", ActivityConstants.NameFromTheFirstActivity); 
        startActivity(intent); 

進入活性2這樣寫：

Intent intent = new Intent(getApplicationContext(), ActivityChooseAction.class); 
        intent.putExtra("calling-activity", ActivityConstants.NameFromTheSecondActivity); 
        startActivity(intent); 

進入Activity3這樣寫：

Intent intent = new Intent(getApplicationContext(), ActivityChooseAction.class); 
       intent.putExtra("calling-activity", ActivityConstants.NameFromTheThirdActivity); 
       startActivity(intent); 

你可以進入你的ActivityChooseAction後，寫這樣的：

Public class ActivityChooseAction...{ 
String parametersharedtouseinthisactivity=""; 
... 
... 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activitychooseaction_layout); 
    mPreferences = getSharedPreferences("CurrentUser", MODE_PRIVATE); 
    int callingActivity = getIntent().getIntExtra("calling-activity", 0); 

     switch (callingActivity) { 
      case ActivityConstants.NameFromTheFirstActivity: 
//write your parameter....if u have saved it into preferences you can do like 
parametersharedtouseinthisactivity = mPreferences.getString("nameparameter", defaultvalueyouwant); 
       break; 
      case ActivityConstants.NameFromTheSecondActivity: 
parametersharedtouseinthisactivity = mPreferences.getString("nameparameter", defaultvalueyouwant); 
       break; 
      case ActivityConstants.NameFromTheThridActivity: 
parametersharedtouseinthisactivity = mPreferences.getString("nameparameter", defaultvalueyouwant); 
       break; 
     } 
} 

我希望這可以幫助某人，我跟着這裏的用戶說：how to know the calling activity in android