融合位置崩溃

Question

嗨，我一直在尝试让融合位置工作，但总是让应用程序崩溃，谁能告诉我 wgy 吗？坦克你

收到此错误：

12-11 02:08:54.525：E/AndroidRuntime(5972)：java.lang.RuntimeException：无法启动活动 ComponentInfo{com.example.teste/com.example.teste.MainActivity}：java.lang。 IllegalStateException：未连接。调用 connect() 并等待 onConnected() 被调用。

清单

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

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="18" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.INTERNET"/>

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name="com.example.teste.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>
    <meta-data android:name="com.google.android.gms.version"       android:value="@integer/google_play_services_version" />
</application>

</manifest>

主要：

package com.example.teste;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesClient;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.location.LocationClient;
import android.location.Location;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.TextView;
import android.widget.Toast;

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

LocationClient mLocationClient;
Location mCurrentLocation;
TextView v1,v2;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    int resultCode =
            GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
    // If Google Play services is available
    if (ConnectionResult.SUCCESS == resultCode) {
        // In debug mode, log the status
        Toast.makeText(this, "Serciços Google Play disponiveis",     Toast.LENGTH_LONG).show(); }
    mLocationClient = new LocationClient(this, this, this);
    mCurrentLocation = mLocationClient.getLastLocation();
    setContentView(R.layout.activity_main);
    v1 = (TextView) findViewById(R.id.textView1);
    v2 = (TextView) findViewById(R.id.textView2);

    v1.setText(Double.toString(mCurrentLocation.getLatitude()));
    v2.setText(Double.toString(mCurrentLocation.getLongitude()));
}


@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;
}


@Override
protected void onStart() {
    // TODO Auto-generated method stub
    super.onStart();
     mLocationClient.connect();
}


@Override
protected void onStop() {
     mLocationClient.disconnect();
    super.onStop();
}


@Override
public void onConnectionFailed(ConnectionResult arg0) {
    // TODO Auto-generated method stub

}


@Override
public void onConnected(Bundle arg0) {
    Toast.makeText(this, "Connected", Toast.LENGTH_SHORT).show();

}


@Override
public void onDisconnected() {
     Toast.makeText(this, "Disconnected. Please re-connect.",
                Toast.LENGTH_SHORT).show();

}

}

布局：

    <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" >

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentTop="true"
    android:layout_marginLeft="28dp"
    android:layout_marginTop="21dp"
    android:text="Large Text"
    android:textAppearance="?android:attr/textAppearanceLarge" />

<TextView
    android:id="@+id/textView2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignRight="@+id/textView1"
    android:layout_below="@+id/textView1"
    android:layout_marginTop="32dp"
    android:text="Large Text"
    android:textAppearance="?android:attr/textAppearanceLarge" />

Answer 1

正如错误消息所说，在调用onConnected() 之前，您不能调用mLocationClient.getLastLocation()。将该调用（以及任何依赖它的调用）移至您的 onConnected() 方法。