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In Android, you pass variables in different activity, usually using the bundle method of adding variables in intent.
When saving parameters:
Copy Code code as follows:
Intent Intent = new Intent ();
Intent.setclass (A.this, B.class);
Bundle Bundle = new Bundle ();
Bundle.putstring ("name", "Xiaozhu");
Intent.putextras (bundle);
StartActivity (Intent);
Read parameters:
Copy Code code as follows:
Intent Intent = This.getintent ();
Bundle Bundle = Intent.getextras ();
String name = bundle.getstring ("name");
[Java] View plaincopy
Intent Intent = This.getintent ();
Bundle Bundle = Intent.getextras ();
String name = bundle.getstring ("name");
However, when using the same variable frequently in multiple activity, using bundle is cumbersome, and each call to the activity needs to be set once.
For use throughout the application, static variables are generally used in Java, and a more elegant approach to Android is to use the application context.
Create a new class that inherits from application
Copy Code code as follows:
Class MyApp extends Application {
Private String MyState;
Public String getState () {
return mystate;
}
public void SetState (String s) {
MyState = s;
}
}
You can add a name attribute to the Androidmanifest.xml application, as shown in the following:
Copy Code code as follows:
<application android:name= ". MyApp "android:icon=" @drawable/icon "android:label=" @string/app_name ">
When used:
Copy Code code as follows:
Class Blah extends Activity {
@Override
public void OnCreate (Bundle b) {
...
MYAPP appstate = ((MyApp) Getapplicationcontext ());
String state = Appstate.getstate ();
...
}
}
