啓動已安裝的應用程序

Question

如何啓動已安裝的應用程序？

我已經安裝使用如下： File file = new File（dir，「App.apk」）;

Intent intent = new Intent(Intent.ACTION_VIEW); 

intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive"); 

startActivity(intent); 

第二次，我檢查包是否已安裝，如果是，我想啓動。

Intent intent = new Intent（com.example.app）;

感謝先進！

Answer 1

我使用這種方法。你應該改變包名和類名。

    private static final String GPS_STATUS_PACKAGE_NAME = "com.eclipsim.gpsstatus2"; 
    private static final String GPS_STATUS_CLASS_NAME = "com.eclipsim.gpsstatus2.GPSStatus"; 
    /** 
    * Run GpsStatus & toolbox application 
    * 
    * @param context 
    *   which can start activity 
    */ 
    public static void runGpsStatus(Context context) { 
     Intent intent = new Intent(Intent.ACTION_MAIN); 
     intent.setComponent(new ComponentName(GPS_STATUS_PACKAGE_NAME, GPS_STATUS_CLASS_NAME)); 
     List list = context.getPackageManager().queryIntentActivities(intent, PackageManager.COMPONENT_ENABLED_STATE_DEFAULT); 

     if (list.size() > 0) { 
      // Have application 
      context.startActivity(intent); 
     } else { 
      // None application 
     } 
    }