android代码集锦

调用root权限的应用：

     /**
      * 执行Command命令的函数
      *
      * @param command  命令
      * @return 执行结果
      */
     public static boolean runRootCommand(String command) {
         Process process = null;
         DataOutputStream os = null;
         try {
             process = Runtime.getRuntime().exec("su");
             os = new DataOutputStream(process.getOutputStream());
             os.writeBytes(command + "\n");
             os.writeBytes("exit\n");
             os.flush();
             process.waitFor();
         } catch (Exception e) {
             Log.d(TAG, "the device is not rooted， error message： " + e.getMessage());
             return false;
         } finally {
             try {
                 if (os != null) {
                     os.close();
                 }
                 if (process != null) {
                     process.destroy();
                 }
             } catch (Exception e) {
                 e.printStackTrace();
             }
         }
         return true;
     }

获取安装了所有APP的信息：

     class PInfo {
         private String appname = "";
         private String pname = "";
         private String versionName = "";
         private int versionCode = 0;
         private Drawable icon;

         private void prettyPrint() {
             Log.i("MainActivity", appname + "|\t" + pname + "|\t" + versionName + "|\t" + versionCode + "|\t");
         }
     }

     private void listPackages() {
         // false = no system packages
         ArrayList<PInfo> apps = getInstalledApps(false);
         final int max = apps.size();
         for (int i = 0; i < max; i++) {
             apps.get(i).prettyPrint();
         }
     }

     private ArrayList<PInfo> getInstalledApps(boolean getSysPackages) {
         ArrayList<PInfo> res = new ArrayList<PInfo>();
         List<PackageInfo> packs = getPackageManager().getInstalledPackages(0);
         for (int i = 0; i < packs.size(); i++) {
             PackageInfo p = packs.get(i);
             if ((!getSysPackages) && (p.versionName == null)) {
                 continue;
             }
             PInfo newInfo = new PInfo();
             newInfo.appname = p.applicationInfo.loadLabel(getPackageManager()).toString();
             newInfo.pname = p.packageName;
             newInfo.versionName = p.versionName;
             newInfo.versionCode = p.versionCode;
             newInfo.icon = p.applicationInfo.loadIcon(getPackageManager());
             res.add(newInfo);
         }
         return res;
     }

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