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我是新手android &我正在使用android-studio。我正在尝试构建一个可以将当前位置发送给我的朋友的应用程序。我下面developers.google.com，但是当我试图执行ConnectionCallbacks，无法实现ConnectionCallbacks，OnConnectionFailedListenerin主要活动
OnConnectionFailedListener在主要活动中它显示了这样的错误，
:cannot resolve symbol ConnectionCallbacks
:cannot resolve symbol ConnectionCallbacks
我试图改变：
public class MainActivity extends AppCompatActivity implements ConnectionCallbacks, OnConnectionFailedListener{ };
到
public class MainActivity extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {
但没有帮助。
mainActivity.java
package com.example.manju.helpme;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.LocationServices;
public class MainActivity extends AppCompatActivity implements ConnectionCallbacks, OnConnectionFailedListener{
/* called when user clicks ALERT! button*/
public void sendMessage(){
String phoneNo = "1234567890";
String message = "hi";
SmsManager smsManager = SmsManager.getDefault();
smsManager.sendTextMessage(phoneNo, null, message, null, null);
}
protected synchronized void buildGoogleApiClient(){
GoogleApiClient mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
@Override
public void onConnected(Bundle connectionHint)
{
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
if(mLastLocation != null){
mLatitudeText.setText(String.valueOf(mLastLocation.getLatitude()));
mLongitudeText.setText(String.valueOf(mLastLocation.getLongitude()));
}
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btnAlert = (Button)findViewById(R.id.btn_Alert);
Button btnAddGuardian = (Button)findViewById(R.id.btn_Add_Guardian);
Button btnRemoveGuardian= (Button)findViewById(R.id.btn_Remove_Guardian);
btnAlert.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
sendMessage();
}
});
btnAddGuardian.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
btnRemoveGuardian.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
gradle.build
apply plugin: 'com.android.application'
android {
compileSdkVersion 23
buildToolsVersion "23.0.0"
defaultConfig {
applicationId "com.example.manju.helpme"
minSdkVersion 15
targetSdkVersion 23
versionCode 1
versionName "1.0"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
compile 'com.android.support:appcompat-v7:23.0.0'
compile 'com.google.android.gms:play-services:7.8.0'
}
androidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.manju.helpme" >
<uses-permission android:name="android.permission.SEND_SMS"> </uses-permission>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<meta-data android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".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=".Guardians"
android:label="@string/title_activity_guardians"
android:parentActivityName=".MainActivity" >
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="com.example.manju.helpme.MainActivity" />
</activity>
</application>
</manifest>
您可能要带，其电话号码，如果它是一个个人设备。 – akodiakson
感谢队友，:-)我很着急。 –
'GoogleApiClient'是否解决？你能从Play服务中导入任何东西吗？ – akodiakson