Tutoriel Android 'HelloTabWidget'

Question

Je pense que j'ai ajouté le code exactement comme il est dit sur le tutoriel de disposition de l'onglet android et corrigé tous les problèmes. L'application semble compiler ok mais quand je l'exécute sur l'émulateur, il dit 'L'application * s'est arrêtée de manière inattendue s'il vous plaît essayez à nouveau'. Voici mes fichiers s'il vous plaît faites le moi savoir si vous voyez un problème avec le code.

Il existe 4 fichiers d'activité distincts.

package com.example.HelloTabWidget; 


import android.app.TabActivity; 
import android.content.Intent; 
import android.content.res.Resources; 
import android.os.Bundle; 
import android.widget.*; 

public class AlbumsActivity extends TabActivity { 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 

    Resources res = getResources(); // Resource object to get Drawables 
    TabHost tabHost = getTabHost(); // The activity TabHost 
    TabHost.TabSpec spec; // Resusable TabSpec for each tab 
    Intent intent; // Reusable Intent for each tab 

    // Create an Intent to launch an Activity for the tab (to be reused) 
    intent = new Intent().setClass(this, ArtistsActivity.class); 

    // Initialize a TabSpec for each tab and add it to the TabHost 
    spec = tabHost.newTabSpec("artists").setIndicator("Artists", 
         res.getDrawable(R.drawable.ic_tab_artists)) 
        .setContent(intent); 
    tabHost.addTab(spec); 

    // Do the same for the other tabs 
    intent = new Intent().setClass(this, AlbumsActivity.class); 
    spec = tabHost.newTabSpec("albums").setIndicator("Albums", 
         res.getDrawable(R.drawable.ic_tab_artists_grey)) 
        .setContent(intent); 
    tabHost.addTab(spec); 

    intent = new Intent().setClass(this, SongsActivity.class); 
    spec = tabHost.newTabSpec("songs").setIndicator("Songs", 
         res.getDrawable(R.drawable.ic_tab_artists_white)) 
        .setContent(intent); 
    tabHost.addTab(spec); 

    tabHost.setCurrentTab(2); 
} 



} 

package com.example.HelloTabWidget; 

import android.app.TabActivity; 
import android.content.Intent; 
import android.content.res.Resources; 
import android.os.Bundle; 
import android.widget.TabHost; 

public class ArtistsActivity extends TabActivity { 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 

    Resources res = getResources(); // Resource object to get Drawables 
    TabHost tabHost = getTabHost(); // The activity TabHost 
    TabHost.TabSpec spec; // Resusable TabSpec for each tab 
    Intent intent; // Reusable Intent for each tab 

    // Create an Intent to launch an Activity for the tab (to be reused) 
    intent = new Intent().setClass(this, ArtistsActivity.class); 

    // Initialize a TabSpec for each tab and add it to the TabHost 
    spec = tabHost.newTabSpec("artists").setIndicator("Artists", 
         res.getDrawable(R.drawable.ic_tab_artists)) 
        .setContent(intent); 
    tabHost.addTab(spec); 

    // Do the same for the other tabs 
    intent = new Intent().setClass(this, AlbumsActivity.class); 
    spec = tabHost.newTabSpec("albums").setIndicator("Albums", 
         res.getDrawable(R.drawable.ic_tab_artists_grey)) 
        .setContent(intent); 
    tabHost.addTab(spec); 

    intent = new Intent().setClass(this, SongsActivity.class); 
    spec = tabHost.newTabSpec("songs").setIndicator("Songs", 
         res.getDrawable(R.drawable.ic_tab_artists_white)) 
        .setContent(intent); 
    tabHost.addTab(spec); 

    tabHost.setCurrentTab(2); 
} 

} 


package com.example.HelloTabWidget; 

import android.app.TabActivity; 
import android.content.Intent; 
import android.content.res.Resources; 
import android.os.Bundle; 
import android.widget.TabHost; 

public class HelloTabWidget extends TabActivity { 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 

    Resources res = getResources(); // Resource object to get Drawables 
    TabHost tabHost = getTabHost(); // The activity TabHost 
    TabHost.TabSpec spec; // Resusable TabSpec for each tab 
    Intent intent; // Reusable Intent for each tab 

    // Create an Intent to launch an Activity for the tab (to be reused) 
    intent = new Intent().setClass(this, ArtistsActivity.class); 

    // Initialize a TabSpec for each tab and add it to the TabHost 
    spec = tabHost.newTabSpec("artists").setIndicator("Artists", 
         res.getDrawable(R.drawable.ic_tab_artists)) 
        .setContent(intent); 
    tabHost.addTab(spec); 

    // Do the same for the other tabs 
    intent = new Intent().setClass(this, AlbumsActivity.class); 
    spec = tabHost.newTabSpec("albums").setIndicator("Albums", 
         res.getDrawable(R.drawable.ic_tab_artists_grey)) 
        .setContent(intent); 
    tabHost.addTab(spec); 

    intent = new Intent().setClass(this, SongsActivity.class); 
    spec = tabHost.newTabSpec("songs").setIndicator("Songs", 
         res.getDrawable(R.drawable.ic_tab_artists_white)) 
        .setContent(intent); 
    tabHost.addTab(spec); 

    tabHost.setCurrentTab(2); 
}} 




package com.example.HelloTabWidget; 


import android.app.TabActivity; 
import android.content.Intent; 
import android.content.res.Resources; 
import android.os.Bundle; 
import android.widget.TabHost; 

public class SongsActivity extends TabActivity { 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 

    Resources res = getResources(); // Resource object to get Drawables 
    TabHost tabHost = getTabHost(); // The activity TabHost 
    TabHost.TabSpec spec; // Resusable TabSpec for each tab 
    Intent intent; // Reusable Intent for each tab 

    // Create an Intent to launch an Activity for the tab (to be reused) 
    intent = new Intent().setClass(this, ArtistsActivity.class); 

    // Initialize a TabSpec for each tab and add it to the TabHost 
    spec = tabHost.newTabSpec("artists").setIndicator("Artists", 
         res.getDrawable(R.drawable.ic_tab_artists)) 
        .setContent(intent); 
    tabHost.addTab(spec); 

    // Do the same for the other tabs 
    intent = new Intent().setClass(this, AlbumsActivity.class); 
    spec = tabHost.newTabSpec("albums").setIndicator("Albums", 
         res.getDrawable(R.drawable.ic_tab_artists_grey)) 
        .setContent(intent); 
    tabHost.addTab(spec); 

    intent = new Intent().setClass(this, SongsActivity.class); 
    spec = tabHost.newTabSpec("songs").setIndicator("Songs", 
         res.getDrawable(R.drawable.ic_tab_artists_white)) 
        .setContent(intent); 
    tabHost.addTab(spec); 

    tabHost.setCurrentTab(2); 
}} 

Ce sont les artistes fichier xml dans res/étirables (les images sont présentes dans res/étirables ainsi)

<?xml version="1.0" encoding="utf-8"?> 
<selector xmlns:android="http://schemas.android.com/apk/res/android"> 
<!-- When selected, use grey --> 
<item android:drawable="@drawable/ic_tab_artists_grey" 
     android:state_selected="true" /> 
<!-- When not selected, use white--> 
<item android:drawable="@drawable/ic_tab_artists_white" /> 
</selector> 

C'est le main.xml

<?xml version="1.0" encoding="utf-8"?> 
<TabHost xmlns:android="http://schemas.android.com/apk/res/android" 
android:id="@android:id/tabhost" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent"> 
<LinearLayout 
    android:orientation="vertical" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:padding="5dp"> 
    <TabWidget 
     android:id="@android:id/tabs" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" /> 
    <FrameLayout 
     android:id="@android:id/tabcontent" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:padding="5dp" /> 
</LinearLayout> 
</TabHost> 

cette est le fichier manifeste android

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
package="com.example.HelloTabWidget" android:versionCode="1" 
android:versionName="1.0"> 
<uses-sdk android:minSdkVersion="7" /> 
<application android:icon="@drawable/icon" android:label="@string/app_name"> 
<activity android:name=".HelloTabWidget" android:label="@string/app_name" 
android:theme="@android:style/Theme.NoTitleBar"> 
    <intent-filter> 
     <action android:name="android.intent.action.MAIN" /> 
     <category android:name="android.intent.category.LAUNCHER" /> 
    </intent-filter> 
</activity> 
<activity android:name=".AlbumsActivity" android:label="@string/app_name" 
    android:theme="@android:style/Theme.NoTitleBar"> 

</activity> 
<activity android:name=".ArtistsActivity" android:label="@string/app_name" 
    android:theme="@android:style/Theme.NoTitleBar"> 

</activity> 
<activity android:name=".SongsActivity" android:label="@string/app_name" 
    android:theme="@android:style/Theme.NoTitleBar"> 

</activity> 
</application> 


</manifest> 

J'ai passé des temps à chercher des fautes de frappe et je n'ai rien trouvé, j'ai aussi passé des heures à chercher sur les forums et rien ne semble vraiment expliquer pourquoi cela ne fonctionne pas - je suis nouveau à ce sujet comprendre les réponses mais je ne pense pas que c'est.

Answer 1

Au moment toutes vos classes de Activity.java sont exactement les mêmes que le HelloTabWidget.java qu'ils ne devraient probablement pas

Essayez:

HelloTabWidget.java

package com.example.HelloTabWidget; 

import android.app.TabActivity; 
import android.content.Intent; 
import android.content.res.Resources; 
import android.os.Bundle; 
import android.widget.TabHost; 

public class HelloTabWidget extends TabActivity { 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 

    Resources res = getResources(); 
    TabHost tabHost = getTabHost(); 

    tabHost.addTab(tabHost.newTabSpec("artists").setIndicator("Artists",res.getDrawable(R.drawable.ic_tab_artists)).setContent(new Intent(this, ArtistsActivity.class))); 
    tabHost.addTab(tabHost.newTabSpec("albums").setIndicator("Albums",res.getDrawable(R.drawable.ic_tab_artists)).setContent(new Intent(this, AlbumsActivity.class))); 
    tabHost.addTab(tabHost.newTabSpec("songs").setIndicator("Songs",res.getDrawable(R.drawable.ic_tab_artists)).setContent(new Intent(this, SongsActivity.class))); 

    tabHost.setCurrentTab(2); 
    } 
} 

ArtistsActivity.java

package com.example.HelloTabWidget; 

import android.app.Activity; 
import android.os.Bundle; 


public class ArtistsActivity extends Activity { 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.artistslayout); 

    // your code for this activity ... (not the same as HelloTabWidget.java) 


    } 
} 

Et pareil pour les 2 autres classes d'activités.