Comment déclencher la classe Wallpaperservice.enigine à l'aide du gestionnaire d'alarme (je ne veux pas utiliser RTC_Wakeup)

Question

Je développe une application de fond d'écran.Ce qui crée un dossier dans le stockage externe si ce dossier n'existe pas.Utilisateur Puis l'application va définir le fond d'écran (s'il n'est pas vide) de ce dossier dans l'intervalle fourni par l'utilisateur.

1. File dir= new File(Environment.getExternalStorageDirectory().getAbsolutePath()+"/"+"imagesWallpaper");

   if(!dir.isDirectory()) 
       dir.mkdirs(); 
   

Il ne crée pas le dossier i exteral mémoire don, sais pourquoi

2.I déclenché un service de fond d'écran mais je ne, sais pas pourquoi il est ne démarre pas la classe WallpaperEngine .please help.

WallpaperMainActivity:

public class WallpaperMainActivity extends Activity { 

    private RadioGroup radioGroup; 
    public long interval = 0; 
    File[] wallpaperImages = null; 
    int count = 0; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) 
    { 
     super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_wall_paper_manager); 

    File dir= new File(Environment.getExternalStorageDirectory().getAbsolutePath()+"/"+"imagesWallpaper"); 

    if(!dir.isDirectory()) 
     dir.mkdirs(); 


     radioGroup = (RadioGroup) findViewById(R.id.radioGroup1); 
     radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() 
     { 
      @Override 
      public void onCheckedChanged(RadioGroup group, int checkedId) 
      { 
      long time =Integer.valueOf((String) findViewById(checkedId).getTag()); 
      interval = time*60000; 
      scheduleAlarm();  
      } 
     }); 

    } 

    public void scheduleAlarm() 
    { 
     Intent intent = new Intent(WallpaperMainActivity.this, WallpaperSrvc.class); 
     PendingIntent pintent = PendingIntent.getService(WallpaperMainActivity.this, 1, intent, PendingIntent.FLAG_UPDATE_CURRENT); 
     AlarmManager alarm = (AlarmManager) getSystemService(Context.ALARM_SERVICE); 
     alarm.setRepeating(AlarmManager.RTC, 10*1000, interval, pintent); 
    } 
} 

cours WallpaperSrvc et WallpaperEngine:

public class WallpaperSrvc extends WallpaperService { 
     File[] wallpaperImages = null; 
     int count = 0; 
     Bitmap tmp = null; 
     //Drawable drawable; 

     @Override 
     public Engine onCreateEngine() { 

      return new WallpaperEngine(); 
     } 

     public class WallpaperEngine extends Engine { 
      private boolean mVisible = true; 

      @Override 
      public void onVisibilityChanged(boolean visible) { 
       mVisible = visible; 
       if (visible) 
       { 
        getImage(); 
        draw(); 
       } 
       else 
       { 
        stopSelf();// stop the wallpaper 
       } 
       super.onVisibilityChanged(visible); 
      } 

      @Override 
      public void onOffsetsChanged(float xOffset, float yOffset, 
        float xOffsetStep, float yOffsetStep, int xPixelOffset, 
        int yPixelOffset) { 
       draw(); 
       super.onOffsetsChanged(xOffset, yOffset, xOffsetStep, yOffsetStep, 
         xPixelOffset, yPixelOffset); 
      } 

      @Override 
      public void onSurfaceChanged(SurfaceHolder holder, int format, 
        int width, int height) { 

       super.onSurfaceChanged(holder, format, width, height); 
      } 

      @Override 
      public void onSurfaceCreated(SurfaceHolder holder) { 
       getImage(); 
       super.onSurfaceCreated(holder); 
      } 

      @Override 
      public void onSurfaceDestroyed(SurfaceHolder holder) { 
       super.onSurfaceDestroyed(holder); 
       mVisible = false; 
       stopSelf(); 
       // stop the wallaperservice 
      } 


     } 

     public void getImage() 
     { 
      File dir= new File(Environment.getExternalStorageDirectory().getAbsolutePath()+"/"+"imagesWallpaper"); 

      if(!dir.exists()) 
       dir.mkdir(); 
      else 
       wallpaperImages = dir. listFiles(); 

      if(count < wallpaperImages.length) 
      { 
       this.tmp = BitmapFactory.decodeFile(wallpaperImages[count].getAbsolutePath()); 
       count++; 
      } 
      else 
      { 
       count = 0; 
       this.tmp = BitmapFactory.decodeFile(wallpaperImages[count].getAbsolutePath()); 
      } 

     }; 
     public void draw() { 
      WallpaperManager myWallpaperManager = WallpaperManager.getInstance(getApplicationContext()); 
      try 
      { 
       //Bitmap wallpaper = ((BitmapDrawable) drawable).getBitmap(); 
       myWallpaperManager.setBitmap(tmp); 
      } catch (IOException e) { 
       // TODO Auto-generated catch block 
       e.printStackTrace(); 
      } 


     }; 
    } 

Manifest:

<uses-sdk 
     android:minSdkVersion="17" 
     android:targetSdkVersion="21" /> 
    <uses-permission android:name="com.android.alarm.permission.SET_ALARM"/> 
    <uses-permission android:name="android.permission.SET_WALLPAPER" /> 

    <application 
     android:icon="@drawable/ic_launcher" 
     android:label="@string/app_name" 
     android:theme="@style/AppTheme" > 
     <service 
      android:name=".WallpaperSrvc" 
      android:enabled="true" 
      android:label="wallpaper_service" 
      android:icon="@drawable/ic_launcher" 
      android:permission="android.permission.BIND_WALLPAPER" > 
      <intent-filter> 
       <action android:name="android.service.wallpaper.WallpaperService" > 
       </action> 
      </intent-filter> 

      <meta-data 
       android:name="android.service.wallpaper" 
       android:resource="@xml/mywallpaper" > 
      </meta-data> 
     </service> 
     <activity 
      android:name=".WallpaperMainActivity" 
      android:exported="true" 
      android:label="@string/app_name" 
      android:theme="@android:style/Theme.Light.WallpaperSettings" > 
      <intent-filter> 
       <action android:name="android.intent.action.MAIN" /> 

       <category android:name="android.intent.category.LAUNCHER" /> 
      </intent-filter> 
     </activity> 
     <receiver android:name=".WallpaperSrvc"/>  
    </application> 
</manifest> 

principale activité Mise en page:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:paddingBottom="@dimen/activity_vertical_margin" 
    android:paddingLeft="@dimen/activity_horizontal_margin" 
    android:paddingRight="@dimen/activity_horizontal_margin" 
    android:paddingTop="@dimen/activity_vertical_margin"> 

    <LinearLayout 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:clickable="true" 
     android:orientation="vertical" > 

     <TextView 
      android:id="@+id/textView1" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:layout_marginTop="0dp" 
      android:orientation="horizontal" 
      android:text="@string/Discription" 
      android:textAppearance="?android:attr/textAppearanceLarge" /> 

     <RadioGroup 
      android:id="@+id/radioGroup1" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:checkedButton="@+id/one_day" 
      android:clickable="true" 
      android:orientation="vertical" 
      android:scrollbars="vertical" > 

     <RadioButton 
      android:id="@+id/oneminute" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="1 minute" 
      android:tag="1"/> 

     <RadioButton 
      android:id="@+id/thirty_minutes" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="30 minutes" 
      android:tag="30"/> 

     <RadioButton 
      android:id="@+id/one_hour" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="1 hour" 
      android:tag="60"/> 
     <RadioButton 
      android:id="@+id/two_hours" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="2 hours" 
      android:tag="120"/> 

     <RadioButton 
      android:id="@+id/six_hours" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="6 hours" 
      android:tag="360"/> 

     <RadioButton 
      android:id="@+id/tvlv_hours" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="12 hours" 
      android:tag="720"/> 
     <RadioButton 
      android:id="@+id/one_day" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="1 day" 
      android:tag="1440"/> 

     <RadioButton 
      android:id="@+id/three_days" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="3 days" 
      android:tag="4320"/> 

     <RadioButton 
      android:id="@+id/oneweek" 
      android:layout_width="wrap_content" 
      android:layout_height="wrap_content" 
      android:text="week" 
      android:tag="10080"/> 
    </RadioGroup> 
    </LinearLayout> 

</LinearLayout> 

res/xml/mywallpaper.xml:

<?xml version="1.0" encoding="UTF-8"?> 
<wallpaper 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    android:thumbnail="@drawable/ic_launcher" 
    android:description="@string/wallpaper_description" 
    android:settingsActivity="com.wallpaper.WallpaperMainActivity"/> 

Answer 1

vous devez utiliser le droit d'écriture de stockage externe. C'est pourquoi il ne crée pas votre répertoire.

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 

ajouter ceci avec votre persmissions alarme et de papier peint dans votre manifeste