我创建了显示设备位置的简单 android 应用程序，但是当我在模拟器中运行时，它在运行应用程序时显示错误。
package my.loc;
import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.TextView;
public class LocActivity extends Activity {
/** Called when the activity is first created. */
TextView textView;
@Override
public void onCreate(Bundle savedInstanceState) {
textView = (TextView) findViewById(R.id.text_view);
LocationManager manager =
(LocationManager) getSystemService(Context.LOCATION_SERVICE);
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Location loc =
manager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
textView.setText("latitude: " + loc.getLatitude()
+ "\nlongitude: " + loc.getLongitude());
} }
Activity.xml 文件是这样的
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/text_view"
/>
和清单是这样的
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="my.loc"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="8" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".LocActivity" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
错误是：
应用程序 loc 已意外停止。