Question

我想检查调用活动的名称以检查某些条件。解决方案是什么？

Answer 1

我认为你甚至可以实现这一目标 getCallingActivity().getClassName()

Answer 2

您可以使用Bundle

在活动之间发送数据

看一下这个例子： http://www.balistupa.com/blog/2009/08/passing-data-or-parameter-to-another-activity-android/

基本上你需要把调用者的名字作为参数：

Bundle bundle = new Bundle();
bundle.putString(this.class.getName(), “ClassName”);

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

在ActivityClass2中，您可以使用以下方法读取此参数：

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

Answer 3

步骤1：创建你的界面 - ＆gt;右键你的项目 - ＆gt; New-＆gt; JavaClass-＆gt; Kind = Interface

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

步骤2：进入每个活动（Activity1或Activity2或Activity3）当你建立你的意图调用ActivityFromWhereYouWantChooseTheAction（称为ActivityChooseAction）时，你需要添加一个额外的... 进入Activity1写这个：

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

进入Activity2写下这个：

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

进入Activity3写下这个：

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

进入ActivityChooseAction后写下：

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;
        }
}

我希望这可以帮助别人，我按照用户在这里说的话：how to know the calling activity in android

如何获取呼叫活动的名称？

3 个答案: