Implement a jump between Android activity

Android programs generally do not have only one activity, and will encounter jumps between the activity. The following is a jump using intent to do the activity inside the application. For example, the first activity of an application is:

After clicking the "Next" button:

This requires writing two activity classes. The first one is: mainactivity

1  PackageCom.easymorse;2 3 Importandroid.app.Activity;4 Importandroid.content.Intent;5 ImportAndroid.os.Bundle;6 ImportAndroid.view.View;7 ImportAndroid.view.View.OnClickListener;8 ImportAndroid.widget.Button;9 Ten  Public classMainactivityextendsActivity { One  A     Privatebutton button; -  -     /**Called when the activity is first created.*/ the @Override -      Public voidonCreate (Bundle savedinstancestate) { -         Super. OnCreate (savedinstancestate); - Setcontentview (r.layout.main); +  -          This. Button = (Button) This. Findviewbyid (R.id.button01); +          This. Button.setonclicklistener (NewOnclicklistener () { A @Override at              Public voidOnClick (View v) { -                 Intent Intent = new Intent (); -                 Intent.setclass (mainactivity.this, Nextactivity.class); -  startactivity (Intent); -             } -         }); in     } -}

The second one is: nextactivity

1  PackageCom.easymorse;2 3 Importandroid.app.Activity;4 ImportAndroid.os.Bundle;5 6  Public classNextactivityextendsActivity {7 @Override8     protected voidonCreate (Bundle savedinstancestate) {9         Super. OnCreate (savedinstancestate);Ten          This. Setcontentview (r.layout.next_activity); One     } A}

Then, add the two activity declarations to the androidmanifest.xml.

1 <?XML version= "1.0" encoding= "Utf-8"?>2 <Manifestxmlns:android= "Http://schemas.android.com/apk/res/android"3  Package= "Com.easymorse"4 Android:versioncode= "1"5 Android:versionname= "1.0">6     <ApplicationAndroid:icon= "@drawable/icon"Android:label= "@string/app_name">7         <ActivityAndroid:name=". Mainactivity "8 Android:label= "@string/app_name">9             <Intent-filter>Ten                 <ActionAndroid:name= "Android.intent.action.MAIN" /> One                 <categoryAndroid:name= "Android.intent.category.LAUNCHER" /> A             </Intent-filter> -         </Activity> -  the     <ActivityAndroid:name= "Nextactivity"></Activity> - </Application> -     <USES-SDKandroid:minsdkversion= "3" /> -  + </Manifest> 

Increase the constant string in String.xml:

1 <?XML version= "1.0" encoding= "Utf-8"?>2 <Resources>3     <stringname= "Hello">Hello World, mainactivity!</string>4     <stringname= "App_name">Activity.forward.demo</string>5     <stringname= "Next_button">Next</string>6 </Resources>

In addition to the original main.xml in the layout directory:

1 <?XML version= "1.0" encoding= "Utf-8"?>2 <LinearLayoutxmlns:android= "Http://schemas.android.com/apk/res/android"3 android:orientation= "vertical"4 Android:layout_width= "Fill_parent"5 Android:layout_height= "Fill_parent"6     >7 <TextView8     Android:layout_width= "Fill_parent" 9 Android:layout_height= "Wrap_content" Ten Android:text= "@string/hello" One     /> A <ButtonAndroid:text= "@string/next_button"Android:id= "@+id/button01"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"></Button> - </LinearLayout>

You also need to create a nextactivity layout file declaration, such as Next_activity.xml:

1 <?XML version= "1.0" encoding= "Utf-8"?>2 <LinearLayout3   xmlns:android= "Http://schemas.android.com/apk/res/android"4 Android:layout_width= "Wrap_content"5 Android:layout_height= "Wrap_content">6 <TextViewAndroid:text= "@string/next_button"Android:id= "@+id/textview01"Android:layout_width= "Wrap_content"Android:layout_height= "Wrap_content"></TextView>7 </LinearLayout>

In this case, if you press the fallback key back to mainactivity. If you do not want to fall back to the previous activity, quit. Need this:

1          This. Button = (Button) This. Findviewbyid (R.id.button01);2          This. Button.setonclicklistener (NewOnclicklistener () {3 @Override4              Public voidOnClick (View v) {5Intent Intent =NewIntent ();6Intent.setclass (mainactivity. This, Nextactivity.class);7 startactivity (intent);8 finish ();9             }Ten});

Implement a jump between activity. rar

Implement a jump between Android activity