android程序后臺自動安裝代碼

首先增加權限 ：

    <!– 以下是靜默安裝apk所需要到權限 –>
        <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” />  

主要實現代碼如下 ：

    /**


     * 軟件靜默安裝 
     * @param apkAbsolutePath apk文件所在路徑 
     * @return 安裝結果:獲取到的result值<br> 
     *  
     * 如果安裝成功的話是“ 
     * pkg: /data/local/tmp/Calculator.apk  /nSuccess”，<br> 
     * 如果是失敗的話，則沒有結尾的“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;  
    }

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