Android 獲取應用簽名的實現(xiàn)

更新時間：2024年07月01日 11:58:28 作者：夏沫瑯琊

本文主要講下在android中如何獲取應用簽名,也方便平時用來區(qū)分一個應用是不是原包應用,具有一定的參考價值,感興趣的可以了解一下

1: 通過PackageManager獲取簽名信息

首先,通過packageManager獲取到指定應用的PackageInfo. 這里需要傳入的flag是PackageManager.GET_SIGNATURES

/**

{@link PackageInfo} flag: return information about the
signatures included in the package.
@deprecated use {@code GET_SIGNING_CERTIFICATES} instead
*/
@Deprecated
public static final int GET_SIGNATURES = 0x00000040;
PackageManager pm = getPackageManager();
//獲取已安裝應用程序的信息，包括應用程序的包名、圖標、名稱等元數(shù)據(jù)。
List applications = pm.getInstalledApplications(PackageManager.GET_META_DATA);

for (ApplicationInfo applicationInfo : applications) {
try {
//獲取指定應用程序的包信息，其中包括應用程序的簽名信息
PackageInfo packageInfo = packageManager.getPackageInfo(applicationInfo.packageName, PackageManager.GET_SIGNATURES);
Signature[] signs = packageInfo.signatures;
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}
}

2: 獲取SHA1

下面是封裝的utils方法，用于根據(jù)packageInfo.signatures來獲取apk的sha1值。

public class ShaUtils {
    public static String getSHA1(byte[] sig) {
        final char[] hexArray = "0123456789ABCDEF".toCharArray();
        try {
            MessageDigest md = MessageDigest.getInstance("SHA1");
            byte[] digest = md.digest(sig);
            char[] hexChars = new char[digest.length * 2];
            for (int j = 0; j < digest.length; j++) {
                int v = digest[j] & 0xFF;
                hexChars[j * 2] = hexArray[v >>> 4];
                hexChars[j * 2 + 1] = hexArray[v & 0x0F];
            }
            return new String(hexChars);
        } catch (Throwable e) {
            e.printStackTrace();
        }
        return "";
    }

}

下面是整理的一個小demo,展示當前設備的應用列表以及應用簽名,包名,icon信息.

3：demo

創(chuàng)建mainacitity，主要用GridView展示獲取到的應用列表。

public class MainActivity extends AppCompatActivity {
    private GridView gridView;
    private ApkAdapter apkAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        gridView = findViewById(R.id.grid_sign);
        PackageManager packageManager = getPackageManager();
        List<ApplicationInfo> installedApplications = packageManager.getInstalledApplications(PackageManager.GET_META_DATA);
        apkAdapter = new ApkAdapter(installedApplications, this);
        gridView.setAdapter(apkAdapter);
    }


}

acitivity布局如下:

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <GridView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:numColumns="1"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:id="@+id/grid_sign"
        />
</androidx.constraintlayout.widget.ConstraintLayout>

ApkAdapter代碼如下:

public class ApkAdapter extends BaseAdapter {
    private List<ApplicationInfo> list;
    private Context context;
    private PackageManager packageManager;

    public ApkAdapter(List<ApplicationInfo> list, Context context) {
        this.list = list;
        this.context = context;
        packageManager = context.getPackageManager();
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        return list.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View view, ViewGroup parent) {
        if (view == null) {
            view = LayoutInflater.from(context).inflate(R.layout.item_apk, parent, false);
        }
        ApplicationInfo applicationInfo = list.get(position);
        ImageView icon = (ImageView) view.findViewById(R.id.item_icon);
        icon.setImageDrawable(applicationInfo.loadIcon(packageManager));
        TextView label = (TextView) view.findViewById(R.id.item_name);
        label.setText(applicationInfo.packageName);
        TextView sign = (TextView) view.findViewById(R.id.item_sign);
        StringBuilder stringBuilder = new StringBuilder();
        try {
            PackageInfo packageInfo = packageManager.getPackageInfo(applicationInfo.packageName, PackageManager.GET_SIGNATURES);
            Signature[] signs = packageInfo.signatures;
            for (Signature sig : signs) {
                String sha1 = ShaUtils.getSHA1(sig.toByteArray());
                stringBuilder.append("Signature: "+sha1+"\n");
                Log.d("Signature", "packageName = " + packageInfo.packageName + ", signature = " + sha1);
            }
            sign.setText(stringBuilder.toString());
        } catch (Throwable e) {
            Log.e("Signature", "getView: ", e);
        }
        return view;
    }
}

getPackageInfo根據(jù)包名返回PackageInfo 對象
packageInfo.signatures獲取簽名
applicationInfo.loadIcon用于獲取應用圖標
applicationInfo.packageName獲取應用包名

applicationInfo的其他屬性還有:

packageName：應用程序的包名。
className：應用程序的主Activity類名。
processName：應用程序的進程名。
sourceDir：應用程序的APK文件路徑。
dataDir：應用程序的數(shù)據(jù)目錄路徑。
targetSdkVersion：應用程序的目標SDK版本。
uid：應用程序的用戶ID。
flags：應用程序的標志位，如FLAG_SYSTEM表示系統(tǒng)應用。
enabled：應用程序是否啟用。
metaData：應用程序的元數(shù)據(jù)，可以在AndroidManifest.xml中定義。

以及item的布局:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
    android:layout_height="100dp">
    <ImageView
        android:layout_width="80dp"
        android:layout_height="80dp"
        android:id="@+id/item_icon"
        android:layout_margin="10dp"
        />
   <RelativeLayout
       android:layout_width="match_parent"
       android:layout_height="wrap_content"
       android:layout_toRightOf="@+id/item_icon"
       android:layout_marginTop="10dp"
       android:layout_marginRight="10dp"
       >
       <TextView
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:textSize="16sp"
           android:text="xxx"
           android:layout_alignParentTop="true"
           android:textColor="@color/black"
           android:id="@+id/item_name"
           />
       <TextView
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:textColor="#ff0000"
           android:textSize="14sp"
           android:layout_alignParentBottom="true"
           android:layout_marginBottom="10dp"
           android:text="xxxxxxxxx"
           android:id="@+id/item_sign"
           />
   </RelativeLayout>

</RelativeLayout>

最后展示下效果圖:

在這里插入圖片描述