3、MainActivity 类 ，继承FragmentActivity类 ，初始化 添加MainFragment 类，打印哈希值可写可不写
package com.thirdfacebook;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
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.support.v4.app.FragmentActivity;
import android.util.Base64;
import android.util.Log;
import android.view.Menu;
public class MainActivity extends FragmentActivity {
private MainFragment mainFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState == null) {
// Add the fragment on initial activity setup
mainFragment = new MainFragment();
getSupportFragmentManager()
.beginTransaction()
.add(android.R.id.content, mainFragment)
.commit();
<SPAN> </SPAN> } else {
<SPAN> </SPAN> // Or set the fragment from restored state info
<SPAN> </SPAN> mainFragment = (MainFragment) getSupportFragmentManager()
<SPAN> </SPAN> .findFragmentById(android.R.id.content);
<SPAN> </SPAN> }
/**
* 打印哈希值
*/
try {
PackageInfo info = getPackageManager().getPackageInfo(
"com.firstfacebook",
PackageManager.GET_SIGNATURES);
for (Signature signature : info.signatures) {
MessageDigest md = MessageDigest.getInstance("SHA");
md.update(signature.toByteArray());
Log.i("KeyHash:", Base64.encodeToString(md.digest(), Base64.DEFAULT));
}
} catch (NameNotFoundException e) {
} catch (NoSuchAlgorithmException e) {
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
4、AndroidMainfest.xml 添加 facebook LoginActivity(登录activity)
<activity android:name="com.facebook.LoginActivity"/>
5、运行项目 成功运行后登录按钮变成Log Out, 点击Log Out则注销
如果错误，请大牛多多指出！