无法获得Facebook Connect Android SDK的Release Key Hash

Question

我正在尝试为我的应用检索Release Keyhash。我给出了生成的密钥库文件的正确密码和路径，但仍然没有输出我的密钥。

以下是情况的截图。

正如您在上图中所看到的，我已正确提供所有信息，包括我的密码。我的密码是我在生成keystore file时输入的密码。它不会输出任何内容并移动到下一行。

为什么不打印keyhash？

Answer 1

package com.example.id;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import android.os.Bundle;
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.util.Base64;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

public class MainActivity extends Activity {
    PackageInfo info;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button btn = (Button)findViewById(R.id.button1);
        final EditText et = (EditText)findViewById(R.id.editText1);

        btn.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

                try {
                    info = getPackageManager().getPackageInfo("com.example.id", PackageManager.GET_SIGNATURES);
                    for (Signature signature : info.signatures) {
                        MessageDigest md;
                        md = MessageDigest.getInstance("SHA");
                        md.update(signature.toByteArray());
                        String something = new String(Base64.encode(md.digest(), 0));
                        //String something = new String(Base64.encodeBytes(md.digest()));
                        et.setText(something);
                       Toast.makeText(getBaseContext(), "" + something, 2000).show();
                    }
                } catch (NameNotFoundException e1) {
                    Log.e("name not found", e1.toString());
                } catch (NoSuchAlgorithmException e) {
                    Log.e("no such an algorithm", e.toString());
                } catch (Exception e) {
                    Log.e("exception", e.toString());
                }
            }
        });
    }


}

Answer 2

会话打开时尝试此操作

try {
            PackageInfo info = getPackageManager().getPackageInfo("YOUR_PACKAGE_NAME", PackageManager.GET_SIGNATURES);
            for (Signature signature : info.signatures) {
                MessageDigest md = MessageDigest.getInstance("SHA");
                md.update(signature.toByteArray());
                Log.d("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
                }
        } catch (NameNotFoundException e) {

        } catch (NoSuchAlgorithmException e) {

        }

通过这种方式，您的代码将变得与机器无关。