Android应用获取包名等信息_android 根据上下文本获取包名-优快云博客

本文链接：https://blog.youkuaiyun.com/true100/article/details/51028468

本文介绍了如何通过Android系统的API来获取应用程序的相关信息，包括获取应用的包名、图标、版本号、名称、权限及签名等。

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/**
     * 获取当前应用程序的包名
     * @param context 上下文对象
     * @return 返回包名
     */
    public static String getAppProcessName(Context context) {
        //当前应用pid
        int pid = android.os.Process.myPid();
        //任务管理类
        ActivityManager manager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        //遍历所有应用
        List<ActivityManager.RunningAppProcessInfo> infos = manager.getRunningAppProcesses();
        for (ActivityManager.RunningAppProcessInfo info : infos) {
            if (info.pid == pid)//得到当前应用
                return info.processName;//返回包名
        }
        return "";
    }
     /**
      * 获取程序 图标 
      * @param context
      * @param packname 应用包名
      * @return
      */
    public Drawable getAppIcon(Context context,String packname){    
      try {    
          //包管理操作管理类
          PackageManager pm = context.getPackageManager();  
          //获取到应用信息
             ApplicationInfo info = pm.getApplicationInfo(packname, 0);     
             return info.loadIcon(pm);    
        } catch (NameNotFoundException e) {    
            e.printStackTrace();    
        }
    return null;    
    }    

    /**
     * 获取程序的版本号     
     * @param context
     * @param packname
     * @return
     */
    public String getAppVersion(Context context,String packname){    
         //包管理操作管理类
      PackageManager pm = context.getPackageManager();  
          try {    
              PackageInfo packinfo = pm.getPackageInfo(packname, 0);    
              return packinfo.versionName;    
            } catch (NameNotFoundException e) {    
                e.printStackTrace();    

            }
        return packname;    
    }    


    /**
     * 获取程序的名字       
     * @param context
     * @param packname
     * @return
     */
    public String getAppName(Context context,String packname){   
         //包管理操作管理类
      PackageManager pm = context.getPackageManager();  
          try {    
                 ApplicationInfo info = pm.getApplicationInfo(packname, 0);     
                 return info.loadLabel(pm).toString();    
            } catch (NameNotFoundException e) {    
                // TODO Auto-generated catch block    
                e.printStackTrace();    

            }
        return packname;    
    }    
    /*  
     * 获取程序的权限  
     */    
    public String[] getAllPermissions(Context context,String packname){    
          try {    
              //包管理操作管理类
              PackageManager pm = context.getPackageManager(); 
              PackageInfo packinfo =    pm.getPackageInfo(packname, PackageManager.GET_PERMISSIONS);    
              //获取到所有的权限     
              return packinfo.requestedPermissions;    
            } catch (NameNotFoundException e) {    
                e.printStackTrace();    

            }
        return null;    
    }    


    /**
     * 获取程序的签名       
     * @param context
     * @param packname
     * @return
     */
    public static String getAppSignature(Context context,String packname){    
          try {    
              //包管理操作管理类
              PackageManager pm = context.getPackageManager(); 
              PackageInfo packinfo = pm.getPackageInfo(packname, PackageManager.GET_SIGNATURES);    
              //获取当前应用签名 
              return packinfo.signatures[0].toCharsString();    

            } catch (NameNotFoundException e) {    
                e.printStackTrace();    

            }
        return packname;    
    }    
    /**
     * 获取当前展示 的Activity名称
     * @return
     */
  private static String getCurrentActivityName(Context context){          
        ActivityManager activityManager=(ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);  
        String runningActivity=activityManager.getRunningTasks(1).get(0).topActivity.getClassName();  
        return runningActivity;                 
}