实现android的 google第三方登陆！
最近接到一个国外项目 要实现 Facebook twitter google+的第三方登陆 本来打算使用sharesdk的 但是这个第三方插件支持 facebook和twitter，但是在google上总是出现问题，无奈只能选择google的api实现。google的说明文档纯英文 你们都懂得 花费好久终于研究通了 不敢独享 就拿出来给大家分享下。
我这里使用的开发工具是IDEA 下面就是步骤了
上图是原理 下面就是干货 步骤
首先在google developer console创建一个专案
输入专案名 建议和你的项目名一致
之后要填写同意书
这一步比较关键 套件名称就是项目包名 SHA1密码 你可以自己生成，用keytool工具来生成 最后这个秘钥放在这个位置 同时你项目也要绑定秘钥。
最后千万别忘了开启google+服务的api接口 我之前就是忘了 总是获取不到登陆后的用户信息。
这里准备工作只进行了一部分 还有下载最新版本的 google服务包，通过android manager下载。然后导入google play services lib文件 然后将它加到你的项目的dependency中
最后就是代码工作了
在androidmanifest中
2
version="1.0" encoding="utf-8"?>
android:layout_width="fill_parent" android:layout_height="fill_parent">
android:id="@+id/sign_in_button"
android:layout_centerInParent="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
>
最后是activity
package com.example.TrueLife.view;
import android.app.Activity;
import android.content.Intent;
import android.content.IntentSender.SendIntentException;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.Toast;
import com.example.TrueLife.R;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.common.SignInButton;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.GoogleApiClient.ConnectionCallbacks;
import com.google.android.gms.common.api.GoogleApiClient.OnConnectionFailedListener;
import com.google.android.gms.common.api.ResultCallback;
import com.google.android.gms.common.api.Status;
import com.google.android.gms.plus.Plus;
import com.google.android.gms.plus.model.people.Person;
import java.io.InputStream;
public class GoogleActivity extends Activity implements OnClickListener,
ConnectionCallbacks, OnConnectionFailedListener {
private static final int RC_SIGN_IN = 0;
// Logcat tag
private static final String TAG = "MainActivity";
// Profile pic image size in pixels
private static final int PROFILE_PIC_SIZE = 400;
// Google client to interact with Google API
private GoogleApiClient mGoogleApiClient;
// private PlusClient mPlusClient;
/**
* A flag indicating that a PendingIntent is in progress and prevents us
* from starting further intents.
*/
private boolean mIntentInProgress;
private boolean mSignInClicked;
private ConnectionResult mConnectionResult;
private SignInButton btnSignIn;
// private Button btnSignOut, btnRevokeAccess;
// private ImageView imgProfilePic;
// private TextView txtName, txtEmail;
// private LinearLayout llProfileLayout;
// private WebView mWevView;
//
// private int REQUEST_CODE = 10;
public static final int RESULT_CODE =9;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
btnSignIn = (SignInButton) findViewById(R.id.btn_sign_in);
// btnSignOut = (Button) findViewById(R.id.btn_sign_out);
// btnRevokeAccess = (Button) findViewById(R.id.btn_revoke_access);
// imgProfilePic = (ImageView) findViewById(R.id.imgProfilePic);
// txtName = (TextView) findViewById(R.id.txtName);
// txtEmail = (TextView) findViewById(R.id.txtEmail);
// llProfileLayout = (LinearLayout) findViewById(R.id.llProfile);
// mWevView = (WebView)findViewById(R.id.google_webview);
// initWebView();
// Button click listeners
btnSignIn.setOnClickListener(this);
// btnSignOut.setOnClickListener(this);
// btnRevokeAccess.setOnClickListener(this);
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this).addApi(Plus.API, Plus.PlusOptions.builder().build())
.addScope(Plus.SCOPE_PLUS_PROFILE)
.addScope(Plus.SCOPE_PLUS_LOGIN).build();
}
// public void initWebView(){
// WebSettings webSettings = mWevView.getSettings();
// webSettings.setJavaScriptEnabled(true);
// mWevView.loadUrl("file:///android_asset/index.html");
//
// }
protected void onStart() {
super.onStart();
mGoogleApiClient.connect();
}
protected void onStop() {
super.onStop();
if (mGoogleApiClient.isConnected()) {
mGoogleApiClient.disconnect();
}
}
/**
* Method to resolve any signin errors
* */
private void resolveSignInError() {
if (mConnectionResult.hasResolution()) {
try {
mIntentInProgress = true;
mConnectionResult.startResolutionForResult(this, RC_SIGN_IN);
} catch (SendIntentException e) {
mIntentInProgress = false;
mGoogleApiClient.connect();
}
}
}
@Override
public void onConnectionFailed(ConnectionResult result) {
if (!result.hasResolution()) {
GooglePlayServicesUtil.getErrorDialog(result.getErrorCode(), this,
0).show();
return;
}
if (!mIntentInProgress) {
// Store the ConnectionResult for later usage
mConnectionResult = result;
if (mSignInClicked) {
// The user has already clicked 'sign-in' so we attempt to
// resolve all
// errors until the user is signed in, or they cancel.
resolveSignInError();
}
}
}
@Override
protected void onActivityResult(int requestCode, int responseCode,
Intent intent) {
if (requestCode == RC_SIGN_IN) {
if (responseCode != RESULT_OK) {
mSignInClicked = false;
}
mIntentInProgress = false;
if (!mGoogleApiClient.isConnecting()) {
mGoogleApiClient.connect();
}
}
}
@Override
public void onConnected(Bundle arg0) {
mSignInClicked = false;
//Toast.makeText(this, "User is connected!", Toast.LENGTH_LONG).show();
/* This Line is the key */
// Plus.PeopleApi.loadVisible(mGoogleApiClient, null).setResultCallback(this);
// Get user's information
getProfileInformation();
// Update the UI after signin
updateUI(true);
}
/**
* Updating the UI, showing/hiding buttons and profile layout
* */
private void updateUI(boolean isSignedIn) {
// if (isSignedIn) {
// btnSignIn.setVisibility(View.GONE);
// btnSignOut.setVisibility(View.VISIBLE);
// btnRevokeAccess.setVisibility(View.VISIBLE);
// llProfileLayout.setVisibility(View.VISIBLE);
// // mWevView.setVisibility(View.VISIBLE);
//
//
// } else {
// btnSignIn.setVisibility(View.VISIBLE);
// btnSignOut.setVisibility(View.GONE);
// btnRevokeAccess.setVisibility(View.GONE);
// llProfileLayout.setVisibility(View.GONE);
// }
}
/**
* Fetching user's information name, email, profile pic
* */
private void getProfileInformation() {
try {
// Plus.PeopleApi.loadVisible(mGoogleApiClient, null).setResultCallback((ResultCallback
if (Plus.PeopleApi.getCurrentPerson(mGoogleApiClient) != null) {
Person currentPerson = Plus.PeopleApi
.getCurrentPerson(mGoogleApiClient);
String personName = currentPerson.getDisplayName();
String personPhotoUrl = currentPerson.getImage().getUrl();
String personGooglePlusProfile = currentPerson.getUrl();
String email = Plus.AccountApi.getAccountName(mGoogleApiClient);
Log.e(TAG, "Name: " + personName + ", plusProfile: "
+ personGooglePlusProfile + ", email: " + email
+ ", Image: " + personPhotoUrl);
// txtName.setText(personName);
// txtEmail.setText(email);
Intent intent=new Intent();
intent.putExtra("personName", personName);
intent.putExtra("Image",personPhotoUrl);
setResult(RESULT_CODE, intent);
this.finish();
// mWevView.setVisibility(View.VISIBLE);
// String call = "javascript:sumToJava('"+personName+"','"+email+"')";
// mWevView.loadUrl(call);
// by default the profile url gives 50x50 px image only
// we can replace the value with whatever dimension we want by
// replacing sz=X
personPhotoUrl = personPhotoUrl.substring(0,
personPhotoUrl.length() - 2)
+ PROFILE_PIC_SIZE;
// new LoadProfileImage(imgProfilePic).execute(personPhotoUrl);
} else {
Toast.makeText(getApplicationContext(),
"Person information is null", Toast.LENGTH_LONG).show();
}
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void onConnectionSuspended(int arg0) {
mGoogleApiClient.connect();
updateUI(false);
}
// @Override
// public boolean onCreateOptionsMenu(Menu menu) {
// // Inflate the menu; this adds items to the action bar if it is present.
// getMenuInflater().inflate(R.menu.main, menu);
// return true;
// }
/**
* Button on click listener
* */
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.btn_sign_in:
// Signin button clicked
signInWithGplus();
break;
// case R.id.btn_sign_out:
// // Signout button clicked
// signOutFromGplus();
// break;
// case R.id.btn_revoke_access:
// // Revoke access button clicked
// revokeGplusAccess();
// break;
}
}
/**
* Sign-in into google
* */
private void signInWithGplus() {
if (!mGoogleApiClient.isConnecting()) {
mSignInClicked = true;
resolveSignInError();
}
}
/**
* Sign-out from google
* */
private void signOutFromGplus() {
if (mGoogleApiClient.isConnected()) {
Plus.AccountApi.clearDefaultAccount(mGoogleApiClient);
mGoogleApiClient.disconnect();
mGoogleApiClient.connect();
updateUI(false);
}
}
/**
* Revoking access from google
* */
private void revokeGplusAccess() {
if (mGoogleApiClient.isConnected()) {
Plus.AccountApi.clearDefaultAccount(mGoogleApiClient);
Plus.AccountApi.revokeAccessAndDisconnect(mGoogleApiClient)
.setResultCallback(new ResultCallback
@Override
public void onResult(Status arg0) {
Log.e(TAG, "User access revoked!");
mGoogleApiClient.connect();
updateUI(false);
}
});
}
}
/**
* Background Async task to load user profile picture from url
* */
private class LoadProfileImage extends AsyncTask
ImageView bmImage;
public LoadProfileImage(ImageView bmImage) {
this.bmImage = bmImage;
}
protected Bitmap doInBackground(String... urls) {
String urldisplay = urls[0];
Bitmap mIcon11 = null;
try {
InputStream in = new java.net.URL(urldisplay).openStream();
mIcon11 = BitmapFactory.decodeStream(in);
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return mIcon11;
}
protected void onPostExecute(Bitmap result) {
bmImage.setImageBitmap(result);
}
}
}
转载的话 请说明转载出处哈
如果有问题建议研究下google的文档 或者在google搜索 相关的源码