【发布时间】：2012-11-13 15:18:48
【问题描述】：
我是 android 编程新手，我的应用程序有问题。 我的 Gps 只是不搜索位置或其他任何东西。 是的，我的 GPS 已开启。 清单包含许可： ACCESS_COARSE_LOCATION 和 ACCESS_FINE_LOCATION。
有人可以帮我吗？
public class LocationTest extends Activity implements
LocationListener {
private static final String[] A = { "invalid", "n/a", "fine", "coarse" };
private static final String[] P = { "invalid", "n/a", "low", "medium",
"high" };
private static final String[] S = { "out of service",
"temporarily unavailable", "available" };
private LocationManager mgr;
private TextView output;
private String best;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mgr = (LocationManager) getSystemService(LOCATION_SERVICE);
output = (TextView) findViewById(R.id.output);
log("Location providers:");
dumpProviders();
Criteria criteria = new Criteria();
best = mgr.getBestProvider(criteria, true);
log("\nBest provider is: " + best);
log("\nLocations (starting with last known):");
if (best != null) {
Location location = mgr.getLastKnownLocation(best);
dumpLocation(location);
}
}
@Override
protected void onResume() {
super.onResume();
// Start updates (doc recommends delay >= 60000 ms)
if (best != null) {
mgr.requestLocationUpdates(best, 15000, 1, this);
}
}
@Override
protected void onPause() {
super.onPause();
// Stop updates to save power while app paused
mgr.removeUpdates(this);
}
public void onLocationChanged(Location location) {
dumpLocation(location);
}
public void onProviderDisabled(String provider) {
log("\nProvider disabled: " + provider);
}
public void onProviderEnabled(String provider) {
log("\nProvider enabled: " + provider);
}
public void onStatusChanged(String provider, int status,
Bundle extras) {
log("\nProvider status changed: " + provider + ", status="
+ S[status] + ", extras=" + extras);
}
/** Write a string to the output window */
private void log(String string) {
output.append(string + "\n");
}
/** Write information from all location providers */
private void dumpProviders() {
List<String> providers = mgr.getAllProviders();
for (String provider : providers) {
dumpProvider(provider);
}
}
/** Write information from a single location provider */
private void dumpProvider(String provider) {
LocationProvider info = mgr.getProvider(provider);
StringBuilder builder = new StringBuilder();
builder.append("LocationProvider[")
.append("name=")
.append(info.getName())
.append(",enabled=")
.append(mgr.isProviderEnabled(provider))
.append(",getAccuracy=")
.append(A[info.getAccuracy() + 1])
.append(",getPowerRequirement=")
.append(P[info.getPowerRequirement() + 1])
.append(",hasMonetaryCost=")
.append(info.hasMonetaryCost())
.append(",requiresCell=")
.append(info.requiresCell())
.append(",requiresNetwork=")
.append(info.requiresNetwork())
.append(",requiresSatellite=")
.append(info.requiresSatellite())
.append(",supportsAltitude=")
.append(info.supportsAltitude())
.append(",supportsBearing=")
.append(info.supportsBearing())
.append(",supportsSpeed=")
.append(info.supportsSpeed())
.append("]");
log(builder.toString());
}
/** Describe the given location, which might be null */
private void dumpLocation(Location location) {
if (location == null)
log("\nLocation[unknown]");
else
log("\n" + location.toString());
}
}
【问题讨论】：
-
网络呢？他们是否在报告您的位置？您必须知道 GPS 传感器不会报告您在建筑物内的位置。他们只在户外工作。
-
.. 如果第一次运行它会花费很多时间。另请发布 Logcat 输出。
-
回答了，我现在回家了，今天做的够多了，明天如果你还需要它会提供帮助（如果你愿意，我可以把这个项目明天下载）。
-
事实上，这个应用程序在 2.3(Froyo) 版本上工作，但在我的 Jelly bean 或任何高于 Froyo 的版本上都不能工作，现在呢？ =/