Android App 获取root权限后，执行shell命令

背景:

做一个应用，需求是获取root权限后可以停用/启用某些应用，包括系统应用！停用的应用将不在设置-->应用中展示，大部分系统自带的桌面应该也不会再显示！

如果是用menifest.xml中添加android:sharedUserId="android.uid.system" ，需要包的签名与系统的签名一致！

所以考虑使用shell命令执行！

1.获取root权限:String cmd="chmod 777 " + pkgCodePath;

/**
	 * 获取root权限
	 * @param pkgCodePath 通过getPackageCodePath() 获取
	 * @return
	 */
	public static boolean getRootPermission(String pkgCodePath){
		Process process = null;  
        DataOutputStream os = null;  
        try {  
            String cmd="chmod 777 " + pkgCodePath;  
            process = Runtime.getRuntime().exec("su"); //切换到root帐号  
            os = new DataOutputStream(process.getOutputStream());  
            os.writeBytes(cmd + "\n");  
            os.writeBytes("exit\n");  
            os.flush();  
            process.waitFor();  
        } catch (Exception e) {  
            return false;  
        } finally {  
            try {  
                if (os != null) {  
                    os.close();  
                }  
                process.destroy();  
            } catch (Exception e) {  
            }  
        }
        return true;  
	}
 
  
 
  
2.判断root权限获取结果:ls -l pkgCodePath
 
  
 
  
/**
	 * 判断某个路径的app的权限
	 * @param pkgCodePath
	 * @return
	 */
	private static boolean checkRoot(String pkgCodePath){
		Process process = null; 
		try {  
			String cmd="ls -l " + pkgCodePath;
            process = Runtime.getRuntime().exec(cmd); 
         
            BufferedReader mReader = new BufferedReader(new InputStreamReader(process.getInputStream()));
            StringBuffer mRespBuff = new StringBuffer();
            char[] buff = new char[1024*10];
            int ch = 0;
            while((ch = mReader.read(buff)) != -1){
            	mRespBuff.append(buff, 0, ch);
            }
            mReader.close();
            
            String regx="-rwxr[\\s\\S]+";//root后权限的表达式
 
            return Pattern.matches(regx, mRespBuff.toString());

        } catch (Exception e) {  
        	System.out.println("checkRoot exception");
            return false;  
        } finally {  
            try {  
                process.destroy();  
            } catch (Exception e) {  
            	e.printStackTrace();
            }  
        }
	}
 
  
 
  
 
  
3.停用应用:String cmd="pm disable " + packageName; 
 
  
 
  
/**
	 * 停用应用
	 * @param context 上下文信息
	 * @param packageName 应用的包名
	 * @return
	 */
	public static boolean invalidApp(Context context,String packageName){
		if(!getRootPermission(context.getPackageCodePath())){
			Toast.makeText(context, "冻结应用需要root权限", 0).show();
        	return false;
        }
		Process process = null;  
        DataOutputStream os = null;  
        try {  
            String cmd="pm disable " + packageName;  
            process = Runtime.getRuntime().exec("su"); //切换到root帐号  
            os = new DataOutputStream(process.getOutputStream());  
            os.writeBytes(cmd + "\n");  
            os.writeBytes("exit\n");  
            os.flush();  
            process.waitFor();  
        } catch (Exception e) { 
        	Toast.makeText(context, "冻结应用失败", 0).show();
            return false;  
        } finally {  
            try {  
                if (os != null) {  
                    os.close();  
                }  
                process.destroy();  
            } catch (Exception e) {  
            }  
        }  
        Toast.makeText(context, "冻结应用成功", 0).show();
        return true;  
	}
 
  
 
  
4.启用应用:String cmd="pm enable " + packageName;
 
  
 
  
/**
	 * 启用应用
	 * @param context
	 * @param packageName
	 * @return
	 */
	public static boolean validApp(Context context,String packageName){
		if(!getRootPermission(context.getPackageCodePath())){
			Toast.makeText(context, "解除冻结需要root权限", 0).show();
        	return false;
        }
		Process process = null;  
        DataOutputStream os = null;  
        try {  
            String cmd="pm enable " + packageName;  
            process = Runtime.getRuntime().exec("su"); //切换到root帐号  
            os = new DataOutputStream(process.getOutputStream());  
            os.writeBytes(cmd + "\n");  
            os.writeBytes("exit\n");  
            os.flush();  
            process.waitFor();  
        } catch (Exception e) {  
        	Toast.makeText(context, "解除冻结失败", 0).show();
            return false;  
        } finally {  
            try {  
                if (os != null) {  
                    os.close();  
                }  
                process.destroy();  
            } catch (Exception e) {  
            }  
        }  
        Toast.makeText(context, "解除冻结成功", 0).show();
        return true;  
	}