android开发google play服务位置API
我想建立一个应用程序,让我的位置使用谷歌播放服务我已经完成了所有需要的工作,但我认为它不起作用,因为mLastLocation=LocationServices.FusedLocationApi.getLastLocation(mgoogleapClient); 返回null,我不知道为什么。我的项目支持谷歌播放服务android开发google play服务位置API,android,Android,我想建立一个应用程序,让我的位置使用谷歌播放服务我已经完成了所有需要的工作,但我认为它不起作用,因为mLastLocation=LocationServices.FusedLocationApi.getLastLocation(mgoogleapClient); 返回null,我不知道为什么。我的项目支持谷歌播放服务 public class MainActivity extends FragmentActivity implements GoogleApiClient.ConnectionCa
public class MainActivity extends FragmentActivity implements
GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener, LocationListener {
private GoogleApiClient mGoogleApiClient;
private LocationRequest mLocationRequest;
private final static int CONNECTION_FAILURE_RESOLUTION_REQUEST = 9000;
public static final String TAG = MainActivity.class.getSimpleName();
private Location mLastLocation;
private TextView mLatitudeText;
private TextView mLongitudeText;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mLatitudeText = (TextView) findViewById(R.id.mLatitudeText);
mLongitudeText = (TextView) findViewById(R.id.mLongitudeText);
if (mGoogleApiClient == null) {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
}
mLocationRequest = LocationRequest.create()
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY)
.setInterval(10 * 1000) // 10 seconds, in milliseconds
.setFastestInterval(1 * 1000); // 1 second, in milliseconds
}
protected void onStart() {
super.onStart();
mGoogleApiClient.connect();
}
protected void onStop() {
mGoogleApiClient.disconnect();
super.onStop();
}
@Override
protected void onResume() {
super.onResume();
mGoogleApiClient.connect();
}
@Override
protected void onPause() {
super.onPause();
if (mGoogleApiClient.isConnected()) {
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, this);
mGoogleApiClient.disconnect();
}
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
if (connectionResult.hasResolution()) {
try {
// Start an Activity that tries to resolve the error
connectionResult.startResolutionForResult(this, CONNECTION_FAILURE_RESOLUTION_REQUEST);
} catch (IntentSender.SendIntentException e) {
e.printStackTrace();
}
} else {
Log.i(TAG, "Location services connection failed with code " + connectionResult.getErrorCode());
}
}
@Override
public void onConnected(@Nullable Bundle bundle) {
if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission
(this, android.Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED)
{
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest, this);
}
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
if (mLastLocation != null) {
handleNewLocation(mLastLocation);
}
}
@Override
public void onConnectionSuspended(int i) {
}
@Override
public void onLocationChanged(Location location) {
handleNewLocation(location);
}
private void handleNewLocation(Location location) {
double currentLatitude = location.getLatitude();
double currentLongitude = location.getLongitude();
}
格雷德尔先生
apply plugin: 'com.android.application'
android {
compileSdkVersion 25
buildToolsVersion "25.0.2"
defaultConfig {
applicationId "com.example.tazazo.locationgoogleplayservice"
minSdkVersion 15
targetSdkVersion 25
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:25.2.0'
compile 'com.android.support.constraint:constraint-layout:1.0.0-alpha7'
testCompile 'junit:junit:4.12'
compile 'com.google.android.gms:play-services:10.2.0'
}
manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.tazazo.locationgoogleplayservice">
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
与“未知”一样,“最后一个位置”可以是null
。按规定工作。您只需要在自己的代码中处理它。我在onConnected函数中处理它,但它仍然不工作。te应用程序给我一条消息“LocationGooglePlayService已停止”,然后是导致崩溃的其他原因,如果您不理解并希望其他人查看,您应该查看崩溃日志或将其添加到您的问题中。另外-虽然这不可能-我有时在onLocationChanged()
中有一个空的Location
对象,所以在那里进行空检查也不是一个坏主意。