透過選取手機內紀錄的Google帳號，再向GOOGLE取得Token，
接著取得其他基本資料。
程式分成2個畫面：
MainActivity.java是用來做選取帳號以及取得Token。
HomeActivity.java是用來顯示取得的基本資料。
以及取得資料所用的AsyncTask
首先確認把google Play Service加入到專案build.gradle(Module: app )
dependencies {
compile 'com.google.android.gms:play-services-auth:8.4.0'
}
接下來是Layout
activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_margin="7dp" > <TextView android:id="@+id/textViewTitle" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_centerHorizontal="true" android:text="Home Page" android:textSize="24sp" /> <TextView android:id="@+id/textViewNameLabel" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_below="@+id/textViewTitle" android:layout_marginTop="15dp" android:text="Name:" android:textSize="18sp" /> <TextView android:id="@+id/textViewNameValue" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/textViewTitle" android:layout_marginLeft="10dp" android:layout_marginTop="15dp" android:layout_toRightOf="@id/textViewNameLabel" android:text="Name:" android:textSize="18sp" /> <TextView android:id="@+id/textViewEmailLabel" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_below="@id/textViewNameLabel" android:layout_marginTop="15dp" android:text="Email:" android:textSize="18sp" /> <TextView android:id="@+id/textViewEmailValue" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/textViewNameValue" android:layout_marginLeft="10dp" android:layout_marginTop="15dp" android:layout_toRightOf="@id/textViewEmailLabel" android:text="Email:" android:textSize="18sp" /> <TextView android:id="@+id/textViewGenderLabel" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_below="@id/textViewEmailLabel" android:layout_marginTop="15dp" android:text="Gender:" android:textSize="18sp" /> <TextView android:id="@+id/textViewGenderValue" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBottom="@+id/textViewGenderLabel" android:layout_alignLeft="@+id/textViewNameValue" android:text="Gender:" android:textSize="18sp" /> <TextView android:id="@+id/textViewBirthdayLabel" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_below="@id/textViewGenderLabel" android:layout_marginTop="15dp" android:text="Birthday:" android:textSize="18sp" /> <TextView android:id="@+id/textViewBirthdayValue" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/textViewBirthdayLabel" android:layout_alignBottom="@+id/textViewBirthdayLabel" android:layout_toRightOf="@+id/textViewBirthdayLabel" android:text="Birthday:" android:textSize="18sp" /> <ImageView android:id="@+id/imageView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_toRightOf="@+id/textViewTitle"/> </RelativeLayout>
context_main.xml
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" app:layout_behavior="@string/appbar_scrolling_view_behavior" tools:context="com.example.boywhychen.googleaccountsignin.MainActivity" tools:showIn="@layout/activity_main"> <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:text="Please wait..." android:textSize="25sp" /> <ProgressBar android:id="@+id/progressBar1" style="?android:attr/progressBarStyleLarge" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/textView1" android:layout_centerHorizontal="true" /> </RelativeLayout>
activity_home.xml
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" app:layout_behavior="@string/appbar_scrolling_view_behavior" tools:context="com.example.boywhychen.googleaccountsignin.MainActivity" tools:showIn="@layout/activity_main"> <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:text="Please wait..." android:textSize="25sp" /> <ProgressBar android:id="@+id/progressBar1" style="?android:attr/progressBarStyleLarge" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/textView1" android:layout_centerHorizontal="true" /> </RelativeLayout>
程式碼：
MainActivity.java
package com.example.boywhychen.googleaccountsignin; import android.accounts.AccountManager; import android.app.Dialog; import android.content.Context; import android.content.Intent; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.os.Bundle; import android.support.design.widget.FloatingActionButton; import android.support.design.widget.Snackbar; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.view.View; import android.widget.Toast; import com.google.android.gms.auth.GooglePlayServicesAvailabilityException; import com.google.android.gms.auth.UserRecoverableAuthException; import com.google.android.gms.common.AccountPicker; import com.google.android.gms.common.GooglePlayServicesUtil; public class MainActivity extends AppCompatActivity { Context mContext = MainActivity.this; AccountManager mAccountManager; String token; int serverCode; String SCOPE = "oauth2:https://www.googleapis.com/auth/userinfo.profile"; static final int REQUEST_CODE_PICK_ACCOUNT = 1000; static final int REQUEST_CODE_RECOVER_FROM_PLAY_SERVICES_ERROR = 1001; static final int REQUEST_CODE_RECOVER_FROM_AUTH_ERROR = 1002; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab); fab.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG) .setAction("Action", null).show(); } }); pickUserAccount(); } String mEmail; // Received from newChooseAccountIntent(); passed to getToken() @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == REQUEST_CODE_PICK_ACCOUNT) { // Receiving a result from the AccountPicker if (resultCode == RESULT_OK) { mEmail = data.getStringExtra(AccountManager.KEY_ACCOUNT_NAME); getUsername(); // With the account name acquired, go get the auth token } else if (resultCode == RESULT_CANCELED) { // The account picker dialog closed without selecting an account. // Notify users that they must pick an account to proceed. Toast.makeText(this, R.string.pick_account, Toast.LENGTH_SHORT).show(); } else if ((requestCode == REQUEST_CODE_RECOVER_FROM_AUTH_ERROR || requestCode == REQUEST_CODE_RECOVER_FROM_PLAY_SERVICES_ERROR) && resultCode == RESULT_OK) { // Receiving a result that follows a GoogleAuthException, try auth again getUsername(); } } } private void pickUserAccount() { String[] accountTypes = new String[]{"com.google"}; Intent intent = AccountPicker.newChooseAccountIntent(null, null, accountTypes, false, null, null, null, null); startActivityForResult(intent, REQUEST_CODE_PICK_ACCOUNT); } /** * Attempts to retrieve the username. * If the account is not yet known, invoke the picker. Once the account is known, * start an instance of the AsyncTask to get the auth token and do work with it. */ private void getUsername() { if (mEmail == null) { pickUserAccount(); } else { if (checkInternetConnection()) { new GetUsernameTask(MainActivity.this, mEmail, SCOPE).execute(); } else { Toast.makeText(this, R.string.not_online, Toast.LENGTH_LONG).show(); } } } /** * This method is a hook for background threads and async tasks that need to * provide the user a response UI when an exception occurs. */ public void handleException(final Exception e) { // Because this call comes from the AsyncTask, we must ensure that the following // code instead executes on the UI thread. runOnUiThread(new Runnable() { @Override public void run() { if (e instanceof GooglePlayServicesAvailabilityException) { // The Google Play services APK is old, disabled, or not present. // Show a dialog created by Google Play services that allows // the user to update the APK int statusCode = ((GooglePlayServicesAvailabilityException) e) .getConnectionStatusCode(); Dialog dialog = GooglePlayServicesUtil.getErrorDialog(statusCode, MainActivity.this, REQUEST_CODE_RECOVER_FROM_PLAY_SERVICES_ERROR); dialog.show(); } else if (e instanceof UserRecoverableAuthException) { // Unable to authenticate, such as when the user has not yet granted // the app access to the account, but the user can fix this. // Forward the user to an activity in Google Play services. Intent intent = ((UserRecoverableAuthException) e).getIntent(); startActivityForResult(intent, REQUEST_CODE_RECOVER_FROM_PLAY_SERVICES_ERROR); } } }); } //check internet connetion public boolean checkInternetConnection() { ConnectivityManager cm = (ConnectivityManager) this.getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo ni = cm.getActiveNetworkInfo(); if (ni != null && ni.isConnected()) { return ni.isConnected(); } else { return false; } } }
HomeActivity.java
package com.example.boywhychen.googleaccountsignin; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; import java.net.URLConnection; import org.json.JSONException; import org.json.JSONObject; import android.app.Activity; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.AsyncTask; import android.os.Bundle; import android.widget.ImageView; import android.widget.TextView; /** * @author manish * */ public class HomeActivity extends Activity { ImageView imageProfile; TextView textViewName, textViewEmail, textViewGender, textViewBirthday; String textName, textEmail, textGender, textBirthday, userImageUrl; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_home); imageProfile = (ImageView) findViewById(R.id.imageView1); textViewName = (TextView) findViewById(R.id.textViewNameValue); textViewEmail = (TextView) findViewById(R.id.textViewEmailValue); textViewGender = (TextView) findViewById(R.id.textViewGenderValue); textViewBirthday = (TextView) findViewById(R.id.textViewBirthdayValue); /** * get user email using intent */ Intent intent = getIntent(); textEmail = intent.getStringExtra("email_id"); System.out.println(textEmail); textViewEmail.setText(textEmail); /** * get user data from google account */ try { System.out.println("On Home Page***" + GetUsernameTask.GOOGLE_USER_DATA); JSONObject profileData = new JSONObject( GetUsernameTask.GOOGLE_USER_DATA); if (profileData.has("picture")) { userImageUrl = profileData.getString("picture"); new GetImageFromUrl().execute(userImageUrl); } if (profileData.has("name")) { textName = profileData.getString("name"); textViewName.setText(textName); } if (profileData.has("gender")) { textGender = profileData.getString("gender"); textViewGender.setText(textGender); } if (profileData.has("birthday")) { textBirthday = profileData.getString("birthday"); textViewBirthday.setText(textBirthday); } } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } } public class GetImageFromUrl extends AsyncTask<String, Void, Bitmap> { @Override protected Bitmap doInBackground(String... urls) { Bitmap map = null; for (String url : urls) { map = downloadImage(url); } return map; } // Sets the Bitmap returned by doInBackground @Override protected void onPostExecute(Bitmap result) { imageProfile.setImageBitmap(result); } // Creates Bitmap from InputStream and returns it private Bitmap downloadImage(String url) { Bitmap bitmap = null; InputStream stream = null; BitmapFactory.Options bmOptions = new BitmapFactory.Options(); bmOptions.inSampleSize = 1; try { stream = getHttpConnection(url); bitmap = BitmapFactory.decodeStream(stream, null, bmOptions); stream.close(); } catch (IOException e1) { e1.printStackTrace(); } return bitmap; } // Makes HttpURLConnection and returns InputStream private InputStream getHttpConnection(String urlString) throws IOException { InputStream stream = null; URL url = new URL(urlString); URLConnection connection = url.openConnection(); try { HttpURLConnection httpConnection = (HttpURLConnection) connection; httpConnection.setRequestMethod("GET"); httpConnection.connect(); if (httpConnection.getResponseCode() == HttpURLConnection.HTTP_OK) { stream = httpConnection.getInputStream(); } } catch (Exception ex) { ex.printStackTrace(); } return stream; } } }
參考資料：
http://www.androidhub4you.com/2013/09/google-account-integration-in-android.html
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