我正在制作应用程序，我想将它与 G+ 集成，以使用户使用 Google 帐户登录。要创建应用程序，我使用Android Studio。
我在 Stack Overflow 上阅读了许多问题和答案，但我无法修复我的应用程序！
以下是我所做的步骤：
1. 将google-play-services.jar添加到我的项目的 libs 文件夹
2. 在 Android-Studio 项目资源管理器中的 jar 文件上单击“添加为库”
3. 从示例中的 java 文件中添加脚本web
4. 将google-play-services.jar库添加到Build.Gradle文件
5. 启动应用程序使其崩溃
问题是：如何在使用 Android Studio 制作的应用程序中添加 Google+ ingeration，我做错了什么吗？谢谢你的帮助。
这是我的源代码：
Java 类：
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesClient.ConnectionCallbacks;
import com.google.android.gms.common.GooglePlayServicesClient.OnConnectionFailedListener;
import com.google.android.gms.plus.PlusClient;
public class StartActivity extends Activity implements View.OnClickListener, ConnectionCallbacks, OnConnectionFailedListener {
private static final String TAG = "ExampleActivity";
private static final int REQUEST_CODE_RESOLVE_ERR = 9000;
private ProgressDialog mConnectionProgressDialog;
private PlusClient mPlusClient;
private ConnectionResult mConnectionResult;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.loading_screen);
mPlusClient = new PlusClient.Builder(this, this, this)
.setVisibleActivities("http://schemas.google.com/AddActivity", "http://schemas.google.com/BuyActivity")
.build();
mConnectionProgressDialog = new ProgressDialog(this);
mConnectionProgressDialog.setMessage("Signing in...");
initializeSplashElements();
}
/// *** /// PLUS INTEGRATION /// *** ////
@Override
protected void onStart() {
super.onStart();
mPlusClient.connect();
}
@Override
protected void onStop() {
super.onStop();
mPlusClient.disconnect();
}
@Override
public void onConnectionFailed(ConnectionResult result) {
if (result.hasResolution()) {
try {
result.startResolutionForResult(this, REQUEST_CODE_RESOLVE_ERR);
} catch (IntentSender.SendIntentException e) {
mPlusClient.connect();
}
}
// Save the result and resolve the connection failure upon a user click.
mConnectionResult = result;
}
@Override
protected void onActivityResult(int requestCode, int responseCode, Intent intent) {
if (requestCode == REQUEST_CODE_RESOLVE_ERR && responseCode == RESULT_OK) {
mConnectionResult = null;
mPlusClient.connect();
}
}
@Override
public void onConnected(Bundle bundle) {
String accountName = mPlusClient.getAccountName();
Toast.makeText(this, accountName + " is connected.", Toast.LENGTH_LONG).show();
}
@Override
public void onDisconnected() {
Log.d(TAG, "disconnected");
}
/// *** /// PLUS INTEGRATION /// *** ///
(...)
}
布局 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:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".StartActivity"
android:clickable="false"
android:background="@drawable/ziel_pomar_tlo">
<ImageView
android:layout_width="fill_parent"
android:layout_height="150dp"
android:id="@+id/splashLogo"
android:src="@drawable/catch_up_logo_flatten"
android:contentDescription="@string/catchup_logo_describe"
android:layout_marginTop="40dp"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:focusable="false"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="@string/loading_3dot"
android:id="@+id/loadingText"
android:enabled="true"
android:gravity="center"
android:textSize="40dp"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_marginLeft="35dp"
android:layout_marginRight="35dp"
android:layout_marginBottom="35dp"/>
<ScrollView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/scrollView"
android:layout_above="@+id/loadingText"
android:layout_below="@+id/splashLogo"
android:layout_margin="10dp"
android:layout_alignParentEnd="false"
android:layout_centerHorizontal="true">
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:baselineAligned="false"
android:clickable="false"
>
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:id="@+id/gps_row">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/loading_screen_no_gps"
android:id="@+id/gps_desc"
android:textSize="20dp"/>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:weightSum="3"
android:layout_marginTop="10dp">
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/loading_screen_no_gps_settings"
android:id="@+id/gps_settings"
android:layout_weight="2"/>
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/loading_screen_no_gps_ok"
android:id="@+id/gps_fixed"
android:layout_weight="1"/>
</LinearLayout>
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/web_row"
android:layout_gravity="bottom|top"
android:layout_marginTop="20dp">
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/loading_screen_no_web"
android:id="@+id/web_desc"
android:textSize="20dp"/>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:weightSum="3"
android:layout_marginTop="10dp">
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/loading_screen_no_web_settings"
android:id="@+id/web_wifi_settings"
android:layout_weight="1"/>
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/loading_screen_no_web_settings2"
android:id="@+id/web_3g_settings"
android:layout_weight="1"/>
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/loading_screen_no_web_ok"
android:id="@+id/web_fixed"
android:layout_weight="1"/>
</LinearLayout>
</LinearLayout>
</LinearLayout>
</ScrollView>
</RelativeLayout>
构建.Gradle：
buildscript {
repositories {
maven { url 'http://repo1.maven.org/maven2' }
}
dependencies {
classpath 'com.android.tools.build:gradle:0.4'
}
}
apply plugin: 'android'
dependencies {
compile files('libs/android-support-v4.jar', 'libs/google-play-services.jar')
}
android {
compileSdkVersion 17
buildToolsVersion "17.0.0"
defaultConfig {
minSdkVersion 11
targetSdkVersion 17
compileSdkVersion 17
}
}