標籤:
介紹一種當使用者或者其他軟體卸載你的應用時,其守護應用守護該應用重新安裝至系統的方案。
方案缺點:
1、當具有root許可權的刪除時無法守護 (rm data/app/*.apk)
2、當為非root手機時,採用顯示安裝,使用者可選擇取消安裝
方案優點:
1、使用傳統手法卸載軟體時具有root許可權時可頑固守護
2、雙應用守護,無法卸載其中任何一個
方案原理:
採用BroadcastReceiver 接收攔截的應用卸載的訊息,(由於系統原因,當接收到訊息時,系統已經卸載了該應用才發出的訊息,所以無法像簡訊攔截一樣直接攔截)。
1、 接收到應用卸載資訊
2、判斷包名是否為需要守護的包名
3、如果是則啟動重新安裝
4、使用靜默安裝
5、如果失敗使用普通安裝
方案代碼:
BroadcastReceiver
public class ProtectReceiver extends BroadcastReceiver {private static final String TAG = "ProtectReceiver";private String ACTION_PACKAGE_REMOVED = "android.intent.action.PACKAGE_REMOVED";private String PRO_APK_PATH = "/sdcard/test.apk"; //需修改@Overridepublic void onReceive(Context context, Intent intent) {if (ACTION_PACKAGE_REMOVED.equals(intent.getAction())) { //需修改if ("package:com.rapida.test".equals(intent.getDataString())) {reInstallApp(context);}}}private void reInstallApp(Context context) {if (!installSlient(context, PRO_APK_PATH)) {install(context, PRO_APK_PATH);}}private void install(Context context, String filePath) {Intent i = new Intent(Intent.ACTION_VIEW);i.setDataAndType(Uri.parse("file://" + filePath),"application/vnd.android.package-archive");i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);context.startActivity(i);}private boolean installSlient(Context context, String filePath) {String[] args = { "pm", "install", "-r", filePath };ProcessBuilder processBuilder = new ProcessBuilder(args);Process process = null;BufferedReader successResult = null;BufferedReader errorResult = null;StringBuilder successMsg = new StringBuilder();StringBuilder errorMsg = new StringBuilder();boolean result = false;try {process = processBuilder.start();successResult = new BufferedReader(new InputStreamReader(process.getInputStream()));errorResult = new BufferedReader(new InputStreamReader(process.getErrorStream()));String s;while ((s = successResult.readLine()) != null) {successMsg.append(s);}while ((s = errorResult.readLine()) != null) {errorMsg.append(s);}} catch (IOException e) {e.printStackTrace();result = false;} catch (Exception e) {e.printStackTrace();result = false;} finally {try {if (successResult != null) {successResult.close();}if (errorResult != null) {errorResult.close();}} catch (IOException e) {e.printStackTrace();}if (process != null) {process.destroy();}}if (successMsg.toString().contains("Success")|| successMsg.toString().contains("success")) {result = true;} else {result = false;}return result;}
添加許可權
<uses-permission android:name="android.permission.INSTALL_PACKAGES" />
添加receiver
<receiver android:name=".ProtectReceiver" > <intent-filter> <action android:name="android.intent.action.PACKAGE_REMOVED" /> <data android:scheme="package" /> </intent-filter></receiver>
程式應用:
在需要守護的應用裡添加如上代碼,因為是相互守護,需要在兩個應用裡都添加如上代碼。
Android APP卸載守護,雙APP相互守護