android 开发 快速获取MD5，SHA值

在terminal 输入即可

keytool -list -v -keystore ~/.android/debug.keystore -alias androiddebugkey -storepass android -keypass android

获取sha1值的代码如下

public class MainActivity extends AppCompatActivity {
    private TextView main_info_tv;
    private Context context;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        initValues();
    }

    private void initView() {
        // TODO Auto-generated method stub
        main_info_tv = (TextView) findViewById(R.id.main_info_tv);
    }

    private void initValues() {
        // TODO Auto-generated method stub
        main_info_tv.setText(getAppInfos());
    }

    private String getAppInfos() {
        String result = "本demo用途：主要用于查看手机中应用程序的包名、sha1值、入口Activity和版本信息。^_^\n\n";

        Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
        mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
        List mApps = getPackageManager().queryIntentActivities(mainIntent, 0);

        for (int i = 0; i < mApps.size(); i++) {
            try {
                ResolveInfo info = mApps.get(i);
                String appName = info.loadLabel(getPackageManager()).toString();
                String packagename = info.activityInfo.packageName;
                String appname = info.activityInfo.name;
                PackageInfo packageInfo = getPackageManager().getPackageInfo(packagename, 0);
                int appVersionCode = packageInfo.versionCode;
                String appVersionName = packageInfo.versionName;

                try {
                    context = createPackageContext(packagename, CONTEXT_INCLUDE_CODE | CONTEXT_IGNORE_SECURITY);
                } catch (PackageManager.NameNotFoundException e) {
                    e.printStackTrace();
                }
                String sha1 = getSha1.getCertificateSHA1Fingerprint(context);
                result += "NO. " + i + " " + appName + " apk：\n" + "程序包名(PackageName): " + packagename + "\nsha1值: " + sha1 + "\n对应入口Activity: " + appname + "\n版本号: " + appVersionCode + "\n版本名称: " + appVersionName + "\n\n";
            } catch (PackageManager.NameNotFoundException e) {
                // TODO Auto-generated catch block
                // can't reach
                e.printStackTrace();
            }
        }

        return result;
    }

public class getSha1 {
    public static String getCertificateSHA1Fingerprint(Context context) {
        //获取包管理器
        PackageManager pm = context.getPackageManager();
        //获取当前要获取SHA1值的包名，也可以用其他的包名，但需要注意，
        //在用其他包名的前提是，此方法传递的参数Context应该是对应包的上下文。
        String packageName = context.getPackageName();
        //返回包括在包中的签名信息
        int flags = PackageManager.GET_SIGNATURES;
        PackageInfo packageInfo = null;
        try {
            //获得包的所有内容信息类
            packageInfo = pm.getPackageInfo(packageName, flags);
        } catch (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        //签名信息
        Signature[] signatures = packageInfo.signatures;
        byte[] cert = signatures[0].toByteArray();
        //将签名转换为字节数组流
        InputStream input = new ByteArrayInputStream(cert);
        //证书工厂类，这个类实现了出厂合格证算法的功能
        CertificateFactory cf = null;
        try {
            cf = CertificateFactory.getInstance("X509");
        } catch (CertificateException e) {
            e.printStackTrace();
        }
        //X509证书，X.509是一种非常通用的证书格式
        X509Certificate c = null;
        try {
            c = (X509Certificate) cf.generateCertificate(input);
        } catch (CertificateException e) {
            e.printStackTrace();
        }
        String hexString = null;
        try {
            //加密算法的类，这里的参数可以使MD4,MD5等加密算法
            MessageDigest md = MessageDigest.getInstance("SHA1");
            //获得公钥
            byte[] publicKey = md.digest(c.getEncoded());
            //字节到十六进制的格式转换
            hexString = byte2HexFormatted(publicKey);
        } catch (NoSuchAlgorithmException e1) {
            e1.printStackTrace();
        } catch (CertificateEncodingException e) {
            e.printStackTrace();
        }
        return hexString;
    }
    //这里是将获取到得编码进行16进制转换
    private static String byte2HexFormatted(byte[] arr) {
        StringBuilder str = new StringBuilder(arr.length * 2);
        for (int i = 0; i < arr.length; i++) {
            String h = Integer.toHexString(arr[i]);
            int l = h.length();
            if (l == 1)
                h = "0" + h;
            if (l > 2)
                h = h.substring(l - 2, l);
            str.append(h.toUpperCase());
            if (i < (arr.length - 1))
                str.append(':');
        }
        return str.toString();
    }
}

布局文件：

xml version="1.0" encoding="utf-8"?>
xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

            android:id="@+id/main_info_tv"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!" />