android程序后台自动安装代码，android后台代码,首先增加权限：```xm

android程序后台自动安装代码，android后台代码,首先增加权限：```xm

首先增加权限：```xml

<!– 以下是静默安装apk所需要到权限 –>    <uses-permission android:name=“android.permission.INSTALL_PACKAGES” />      <uses-permission android:name=“android.permission.DELETE_PACKAGES” />      <uses-permission android:name=“android.permission.CLEAR_APP_CACHE” />      <uses-permission android:name=“android.permission.CLEAR_APP_USER_DATA” />      <uses-permission android:name=“android.permission.READ_PHONE_STATE” />

 主要实现代码如下 ： ```java    /**          * 软件静默安装          * @param apkAbsolutePath apk文件所在路径          * @return 安装结果:获取到的result值<br>          *           * 如果安装成功的话是“          * pkg: /data/local/tmp/Calculator.apk  /nSuccess”，<br>          * 如果是失败的话，则没有结尾的“Success”。          */          public String silentInstall(String apkAbsolutePath) {              String[] args = { “pm”, “install”, “-r”, apkAbsolutePath };              String result = “”;              ProcessBuilder processBuilder = new ProcessBuilder(args);              Process process = null;              InputStream errIs = null;              InputStream inIs = null;              try {                  ByteArrayOutputStream baos = new ByteArrayOutputStream();                  int read = -1;                  process = processBuilder.start();                errIs = process.getErrorStream();                while ((read = errIs.read()) != -1) {                      baos.write(read);                }                baos.write(“/n”.getBytes());                  inIs = process.getInputStream();                while ((read = inIs.read()) != -1) {                      baos.write(read);                }                byte[] data = baos.toByteArray();                  result = new String(data);              } catch (IOException e) {                  e.printStackTrace();            } catch (Exception e) {                  e.printStackTrace();            } finally {                  try {                      if (errIs != null) {                          errIs.close();                    }                    if (inIs != null) {                          inIs.close();                    }                } catch (IOException e) {                      e.printStackTrace();                }                if (process != null) {                      process.destroy();                }            }            return result;          }