Create a new activity with the button to open it, and then close it by the button

You first need to create an activity to open and close, first create a new class Activity1 in the package of the current project under SCR,

and choose to inherit from the activity class, as shown in:

After configuring the Androidmainifest.xml file, the configuration is followed by one more line in the Androidmainfest.xml code

<activity android:name= "Activity1" ></activity>

After it is created, it overrides a OnCreate () method and binds to Activity1.

Package Cn.hx.helloworld;import Android.app.activity;import Android.os.bundle;import android.view.view;import android.widget.button;//Create a new class Activity1 let it inherit from activity//to run this class is to configure to the Androidmainifest.xml file at the public class Activity1 Extends Activity {private Button btn_closeaty1; @Overrideprotected void OnCreate (Bundle savedinstancestate) {//TODO Auto-generated method Stubsuper.oncreate (savedinstancestate); Setcontentview (r.layout.activity1);//Bind to Activity1}}

To the previous Activity_main.xml pull a button, the ID is changed to BtnStartActivity1, in the Mainactivity.java declaration of a button private buttons btnStartAty1;

Then through Findviewbyid find BtnStartActivity1, and then set an event listener to the button, click the button to perform open Activity1 operation, such as:

1  Public classMainactivityextendsactionbaractivity {2 3     PrivateButton btnStartAty1;4 @Override5     protected voidonCreate (Bundle savedinstancestate) {6         Super. OnCreate (savedinstancestate);7 Setcontentview (r.layout.activity_main);8         9btnstartaty1=(Button) Findviewbyid (r.id.btnstartaty1);Ten         //Error here type Mismatch:cannot convert from View to Button One         //because Findviewbyid returns the view type, it must be forced to replace the button type ABtnstartaty1.setonclicklistener (NewView.onclicklistener () { -         //set an event listener for button buttons - @Override the              Public voidOnClick (View v) { -                 //TODO auto-generated Method Stub -Intent i=NewIntent (mainactivity. This, Activity1.class); - startactivity (i); +             } -         }); +}

In the same vein, you want to close the activity. To add a close button to the Activity.xml, click Close, and complete the button declaration in Acticity1.java, the event is monitored

 PackageCn.hx.HelloWorld;Importandroid.app.Activity;ImportAndroid.os.Bundle;ImportAndroid.view.View;ImportAndroid.widget.Button;//Create a new class Activity1 let it inherit from activity//To run this class, you need to configure it to the Androidmainifest.xml file . Public classActivity1extendsActivity {PrivateButton btn_closeaty1; @Overrideprotected voidonCreate (Bundle savedinstancestate) {//TODO auto-generated Method Stub        Super. OnCreate (savedinstancestate);        Setcontentview (r.layout.activity1); //bind to Activity1btn_closeaty1=(Button) Findviewbyid (r.id.btn_closeaty1); Btn_closeaty1.setonclicklistener (NewView.onclicklistener () {@Override Public voidOnClick (View v) {//TODO auto-generated Method Stubfinish (); //Finish () is a way to perform a close activity operation            }        }); }        }

Create a new activity with the button to open it, and then close it by the button