如何避免 GPS 状态问题 - 在我的 Android 应用程序中暂时不可用

Question

我正在编写一个Android应用程序来获取我的设备的位置，它总是显示GPS状态为暂时不可用，即使我正在更改我的手机的位置，它甚至没有调用位置更改方法，您能调查一下这个问题吗？下面的代码

    ls= (ArrayList<String>)lm.getProviders(false);

    Log.e(""," SIZE "+ls.size());
    sb=new StringBuilder();
    for(int i=0;i<ls.size();i++)
        {Log.e("","Data : "+ls.get(i));
        lp=lm.getProvider(ls.get(i));

        sb.append("\nProvider Name : "+lp.getName());
        sb.append("\nPower Requirement :"+lp.getPowerRequirement());
        sb.append("\nAccuracy : "+lp.getAccuracy()+"\n\n");

        lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1, 1, this);

        Location location=lm.getLastKnownLocation(ls.get(i));           
        }

    strt.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            TextView tv=(TextView)findViewById(R.id.TextView01);
            tv.setText("StarteD :"+sb);

        }
    });

    stop.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            TextView tv=(TextView)findViewById(R.id.TextView01);
            tv.setText("STOPPED ys  :"+res);
            Location location=lm.getLastKnownLocation(ls.get(1));

            if(location==null)
                Log.e("","location object null");
            try{
            tv.append("\nLogitude: "+location.getLongitude());
            tv.append("\nLattitude: "+location.getLatitude());
            tv.append("\nTime:"+location.getTime());
            tv.append("\nSpeed: "+location.getSpeed());
            tv.append("\n Provider:"+location.getProvider());

            }catch(Exception e){}
        }
    });


}
@Override
public void onLocationChanged(Location location) {
    Log.e("","LocationChandgeD... ");
}
@Override
public void onProviderDisabled(String provider) {
    Log.e("",provider+" DIsabled... ");
}
@Override
public void onProviderEnabled(String provider) {
    Log.e("",provider+" Enabled... ");
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
    switch (status) {
    case LocationProvider.OUT_OF_SERVICE:
        Toast.makeText(this, "Status Changed: Out of Service",
                Toast.LENGTH_SHORT).show();
        break;
    case LocationProvider.TEMPORARILY_UNAVAILABLE:
        Toast.makeText(this, "Status Changed: Temporarily Unavailable",
                Toast.LENGTH_SHORT).show();
        break;
    case LocationProvider.AVAILABLE:
        Log.e("", "Status Changed: Available");         
        Toast.makeText(this, "Status Changed: Available",
                Toast.LENGTH_SHORT).show();
        break;
    }

}

Answer 1

不幸的是，如果没有清晰的天空视野（室内或茂密的针叶树覆盖范围），GPS 就无法工作。也许你应该尝试到户外去测试你的程序。