Android 编程下获得应用程序的签名

来源：互联网发布：linux nobody 用户编辑：程序博客网时间：2024/06/06 05:28

源码及安装文件下载方式一：GetAppSignature.zip

说明：应用程序的签名被封装在 packageInfo 中，所以我们要获得应用程序的签名就需要获得 PackageManager 来获得包含有签名信息的 packageInfo，再通过 packageInfo 获得 Signature 数组，循环遍历将签名进行拼接。

代码运行效果：

package cn.sunzn.getappsignature;import android.app.Activity;import android.content.pm.PackageInfo;import android.content.pm.PackageManager;import android.content.pm.PackageManager.NameNotFoundException;import android.content.pm.Signature;import android.os.Bundle;import android.text.TextUtils;import android.view.Menu;import android.view.View;import android.widget.EditText;import android.widget.TextView;import android.widget.Toast;public class MainActivity extends Activity {   private EditText et_pkgname;   private TextView tv_signature;   private PackageManager manager;   private PackageInfo packageInfo;   private Signature[] signatures;   private StringBuilder builder;   private String signature;   public void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       setContentView(R.layout.activity_main);       et_pkgname = (EditText) findViewById(R.id.et_pkgname);       tv_signature = (TextView) findViewById(R.id.tv_signature);       manager = getPackageManager();       builder = new StringBuilder();   }   public void getSignature(View view) {       String pkgname = et_pkgname.getText().toString();       boolean isEmpty = TextUtils.isEmpty(pkgname);       if (isEmpty) {           Toast.makeText(this, "应用程序的包名不能为空！", Toast.LENGTH_SHORT);       } else {           try {               /** 通过包管理器获得指定包名包含签名的包信息 **/               packageInfo = manager.getPackageInfo(pkgname, PackageManager.GET_SIGNATURES);               /******* 通过返回的包信息获得签名数组 *******/               signatures = packageInfo.signatures;               /******* 循环遍历签名数组拼接应用签名 *******/               for (Signature signature : signatures) {                   builder.append(signature.toCharsString());               }               /************** 得到应用签名 **************/               signature = builder.toString();               tv_signature.setText(signature);           } catch (NameNotFoundException e) {               e.printStackTrace();           }       }   }   public boolean onCreateOptionsMenu(Menu menu) {       getMenuInflater().inflate(R.menu.activity_main, menu);       return true;   }}

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