java - 尝试使用 google-play-services_lib 库但出现诸如 'GooglePlayServicesClient not resolved to a type' 之类的错误

Question

我做了什么

我正在学习这些教程:

• developer.android.com/training/location/index.html
• developer.android.com/google/play-services/setup.html
• developer.android.com/tools/projects/projects-eclipse.html#ReferencingLibraryProject

我想我卡住的地方是上面页面中的“在 list 文件中声明库组件”。

我猜这意味着库没有被正确导入或者我没有声明什么。事实上，我敢打赌这是我的错，我可能需要在 list 文件或其他东西中声明一些东西。但是，我对“声明 Activity googleplayservices list ”的所有谷歌搜索让我相信也许没有什么可以为这个库声明的 - 否则我肯定会遇到某种例子？

SDK 管理器

已安装 Google Play 服务
已安装 Google api
没有要安装的更新，所以不可能有任何过时的东西。

导入库项目

我已经导入了库(右键单击我的项目 > 属性 > android > 添加 > 播放服务库)。
尝试勾选和取消勾选“是图书馆”复选框都无济于事。

清理项目&库项目

我已经多次安装并使用项目>clean函数
Eclipse/ADT 多次重启

错误:

Description Resource    Path    Location    Type
GooglePlayServicesClient cannot be resolved to a type   MainActivity.java   /Atapp/src/com/atdev/atapp  line 21 Java Problem

Description Resource    Path    Location    Type
mLocationClient cannot be resolved  MainActivity.java   /Atapp/src/com/atdev/atapp  line 184    Java Problem

Description Resource    Path    Location    Type
Syntax error on token "mCurrentLocation", VariableDeclaratorId expected after this token    MainActivity.java   /Atapp/src/com/atdev/atapp  line 162    Java Problem

Description Resource    Path    Location    Type
The method onConnectionFailed(ConnectionResult) of type MainActivity must override or implement a supertype method  MainActivity.java   /Atapp/src/com/atdev/atapp  line 126    Java Problem

(以及其他)。

感谢您的提前建议。第一次发帖，所以我希望我问的正确并且清楚。

代码

list 文件:

    <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.atdev.atapp"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.atdev.atapp.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.atdev.atapp.Venue"
            android:label="@string/title_activity_venue"
            android:parentActivityName="com.atdev.atapp.MainActivity" >
            <meta-data
                android:name="android.support.PARENT_ACTIVITY"
                android:value="com.atdev.atapp.MainActivity" />
        </activity>
    </application>

</manifest>

主要 Activity java:

    package com.atdev.atapp;

    import android.app.Activity;
    import android.app.Dialog;
    import android.content.Intent;
    import android.content.IntentSender;
    import android.location.Location;
    import android.os.Bundle;
    import android.support.v4.app.DialogFragment;
    import android.util.Log;
    import android.view.Menu;
    import android.view.View;
    import android.widget.EditText;
    import android.widget.Toast;

    import com.google.android.gms.common.ConnectionResult;
    import com.google.android.gms.common.GooglePlayServicesUtil;
    import com.google.android.gms.location.LocationClient;

    public class MainActivity extends Activity implements
    GooglePlayServicesClient.ConnectionCallbacks,
    GooglePlayServicesClient.OnConnectionFailedListener {

    // ************************************************************************

    // GLOBAL CONSTANTS

        // Define a request code to send to Google Play services. This code is returned in Activity.onActivityResult
        private final static int CONNECTION_FAILURE_RESOLUTION_REQUEST = 9000;

        // Set the contents of the venue search field to this string
        public final static String VENUE_SEARCH = "com.atroom.atroom.MESSAGE";

        // Global variable to hold the current location
        Location mCurrentLocation;

        // Define a DialogFragment that displays the google play services error dialog
        public static class ErrorDialogFragment extends DialogFragment {
            // Global field to contain the error dialog
            private Dialog mDialog;
            // Default constructor. Sets the dialog field to null
            public ErrorDialogFragment() {
                super();
                mDialog = null;
            }
            // Set the dialog to display
            public void setDialog(Dialog dialog) {
                mDialog = dialog;
            }
            // Return a Dialog to the DialogFragment.
            @Override
            public Dialog onCreateDialog(Bundle savedInstanceState) {
                return mDialog;
            }
        }

    // ********************************************************************************

    // GOOGLE PLAY SERVICES METHODS

        // Handle results returned to the FragmentActivity by Google Play services
        @Override
        protected void onActivityResult(int requestCode, int resultCode, Intent data) {
            // Decide what to do based on the original request code
            switch (requestCode) {
                case CONNECTION_FAILURE_RESOLUTION_REQUEST :
                    // If the result code is Activity.RESULT_OK, try to connect again
                    switch (resultCode) {
                        case Activity.RESULT_OK :
                        // Try the request again
                        break;
                    }
            }
        }

        // Do the following to test whether Google Play Services are available and take relevant action
        private boolean servicesConnected() {
            // Check that Google Play services is available
            int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
                // If Google Play services is available
                if (ConnectionResult.SUCCESS == resultCode) {
                    // In debug mode, log the status
                    Log.d("Location Updates","Google Play services is available.");
                    // Continue
                    return true;
                // Google Play services was not available for some reason
                } else {
                    // Get the error code
                    int errorCode = connectionResult.getErrorCode();
                    // Get the error dialog from Google Play services
                    Dialog errorDialog = GooglePlayServicesUtil.getErrorDialog(
                            errorCode,
                            this,
                            CONNECTION_FAILURE_RESOLUTION_REQUEST);
                    // If Google Play services can provide an error dialog
                    if (errorDialog != null) {
                        // Create a new DialogFragment for the error dialog
                        ErrorDialogFragment errorFragment =
                                new ErrorDialogFragment();
                        // Set the dialog in the DialogFragment
                        errorFragment.setDialog(errorDialog);
                        // Show the error dialog in the DialogFragment
                        errorFragment.show(getSupportFragmentManager(),
                                "Location Updates");
                    }
                }
        }

        // Location Services calls the following on successful connection to client
        @Override
        public void onConnected(Bundle dataBundle) {
        // Display the connection status
        Toast.makeText(this, "Connected", Toast.LENGTH_SHORT).show();
        }

        // Location Services calls the following if connection to the location client drops because of an error.
        @Override
        public void onDisconnected() {
            // Display the connection status
            Toast.makeText(this, "Disconnected. Please re-connect.",
                    Toast.LENGTH_SHORT).show();
        }

        // Location Services calls the following if the attempt to connect to Location Services fails
        @Override
        public void onConnectionFailed(ConnectionResult connectionResult) {
            /*
             * Google Play services can resolve some errors it detects.
             * If the error has a resolution, try sending an Intent to
             * start a Google Play services activity that can resolve
             * error.
             */
            if (connectionResult.hasResolution()) {
                try {
                    // Start an Activity that tries to resolve the error
                    connectionResult.startResolutionForResult(
                            this,
                            CONNECTION_FAILURE_RESOLUTION_REQUEST);
                    /*
                     * Thrown if Google Play services canceled the original
                     * PendingIntent
                     */
                } catch (IntentSender.SendIntentException e) {
                    // Log the error
                    e.printStackTrace();
                }
            } else {
                /*
                 * If no resolution is available, display a dialog to the
                 * user with the error.
                 */
                showErrorDialog(connectionResult.getErrorCode());
            }
        }


    // *************************************************************************************

    // LOCATION CONNECTION METHODS

        // Set the current location to the last known location while a new location is being sought
        mCurrentLocation = mLocationClient.getLastLocation();


    // *************************************************************************************

    // ACTIVITY METHODS

        // Do the following when the activity is created
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main); 
            // Create a new location client, using the enclosing class to handle callbacks
            mLocationClient = new LocationClient(this, this, this);
        }

        // Do the following when the Activity becomes visible.
        @Override
        protected void onStart() {
            super.onStart();
            // Connect the client. This is in 'onStart' not 'onCreate' as we want to connect whenever
            // the activity becomes visible, not just when the activity is started for the first time.
            mLocationClient.connect();
        }

        // Do the following when the Activity is no longer visible.
        @Override
        protected void onStop() {
            // Disconnecting the client invalidates it. This saves battery - we don't want the location
            // to run in the background when the app/activity is not in use.
            mLocationClient.disconnect();
            super.onStop();
        }

        // Do the following when the menu is created
        @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;
        }

        // Do the following when the Venue Search button is clicked
        public void sendVenueSearch (View view) {
            Intent intent = new Intent(this, Venue.class);
            EditText editText = (EditText) findViewById(R.id.venue_search);
            String message = editText.getText().toString();
            intent.putExtra(VENUE_SEARCH, message);
            startActivity(intent);
        }

}

主要 Activity xml:

    <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:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <EditText
        android:id="@+id/venue_search"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_toLeftOf="@+id/button1"
        android:ems="10"
        android:hint="@+id/venue_search" >

        <requestFocus />
    </EditText>

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/venue_search"
        android:layout_alignParentRight="true"
        android:layout_marginBottom="34dp"
        android:layout_marginRight="31dp"
        android:onClick="sendVenueSearch"
        android:text="@string/button_venue_search" />

    <ListView
        android:id="@+id/venueList"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/venue_search"
        android:layout_below="@+id/button1" >
    </ListView>

</RelativeLayout>

Answer 1

我在实现 GooglePlayServicesClient.ConnectionCallbacks 时遇到了同样的问题，因为它无法解析导入，但只需删除 GooglePlayServicesClient. 前缀并重新组织导入即可纠正它.