我要传递值的活动是应用程序的主要活动菜单。从这个活动中,我开始使用按钮启动所有活动。我想在标题中提到的同时从两个不同的活动中检索值,当我启动每个活动时,我想发送值。有帮助吗?
答案 0 :(得分:1)
使用静态字段或方法
在要从中获取值的所有类中都有静态字符串字段(或用于计算然后返回字符串的方法),然后在活动菜单中获取它们并将其传递到您的startActivity
意向中。 / p>
示例:
class activity-menu extends Activity{
public void StartActivityC(){
// Get value from Activity_A
string value_A = Activity_A.myString;
// Get value from Activity_B
string value_B = Activity_B.myString;
// Store both values in an Intent:
Intent intent = new Intent(this, Activity_C.class);
// store the string from Activity A under "value_A"
intent.putExtra("value_A", value_A);
// store the string from Activity B under "value_B"
intent.putExtra("value_B", value_B);
startActivity(intent);
}
}
public class Activity_A extends Activity{
public static String myString;
public Activity_A(){
myString = "this is from activity A";
}
}
public class Activity_B extends Activity{
public static String myString;
public Activity_B(){
myString = "this is from activity B";
}
}
public class Activity_C extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Get the Intent that started this activity and extract the strings:
Intent intent = getIntent();
String value_A = intent.getStringExtra("value_A");
string value_B = intent.getStringExtra("value_B");
// DONE!
}
}