Android 提取(备份)apk(安装包)

一、通过安卓代码的方式

主要分三步：

根据应用找到包名
根据包名获得apk
提取apk

提取apk代码

private static final String BACKUP_PATH = "/sdcard/backup1/";
private static final String APK = ".apk";private void copyApk(String name, String path) {String dest = BACKUP_PATH + name + APK;//path:app程序源文件路径  dest:新的存储路径  name:app名称new Thread(new CopyRunnable(path, dest, name)).start();
}private String getApk(String packageName) {String appDir = null;try {//通过包名获取程序源文件路径appDir = getPackageManager().getApplicationInfo(packageName, 0).sourceDir;} catch (PackageManager.NameNotFoundException e) {e.printStackTrace();}return appDir;
}/*** 将程序源文件Copy到指定目录*/
private class CopyRunnable implements Runnable {private String source;private String dest;private String key;public CopyRunnable(String source, String dest, String key) {this.source = source;this.dest = dest;this.key = key;}@SuppressLint("StringFormatInvalid")@Overridepublic void run() {// TODO Auto-generated method stubtry {int length = 1024 * 1024;if (!new File(BACKUP_PATH).exists()) {boolean mk = new File(BACKUP_PATH).mkdirs();if (mk) {System.out.println("true");}}File fDest = new File(dest);if (fDest.exists()) {fDest.delete();}fDest.createNewFile();FileInputStream in = new FileInputStream(new File(source));FileOutputStream out = new FileOutputStream(fDest);FileChannel inC = in.getChannel();FileChannel outC = out.getChannel();int i = 0;while (true) {if (inC.position() == inC.size()) {inC.close();outC.close();//成功break;}if ((inC.size() - inC.position()) < 1024 * 1024) {length = (int) (inC.size() - inC.position());} else {length = 1024 * 1024;}inC.transferTo(inC.position(), length, outC);inC.position(inC.position() + length);i++;}} catch (Exception e) {// TODO: handle exceptionLog.e("TAG", e.toString());}}
}

调用

CharSequence label = applicationInfo.loadLabel(getPackageManager());
//百度地图_1.0.1
copyApk(label.toString() + "_" + versionName, getApk(applicationInfo.packageName));

二、通过adb的方式

第一步：找到待提取APK的包名

adb shell pm list packages  #打印系统中所有apk的包名
adb shell pm list packages -3 #列出除了系统应用的第三方应用包名

第二步：通过包名，找到对应的apk文件目录

adb shell pm path com.xxx.xxx 	#进入对应包名的apk文件目录
// 成功后会出现：package:data/data/（包名）/.base.apk或者package:/system/app/xxx/xxx.apk 或者 package:/data/app/xxx/xxx.apk

第三步：将对应的apk提取出来

// 在apk文件目录中将对应apk提取出来
adb pull /system/app/xxx/xxx.apk   或者 adb pull /data/app/xxx/xxx.apk
// 提取出来的文件在adb的配置目录下，一般是在 C:\Users\Administrator> 目录下
// apk文件位置在执行adb命令的目录

或者手机位置复制