Can't create handler inside thread that has not called Looper.prepare() 异常
16lz
2021-01-26
错误原因：
Android中不能在子线程中来刷新UI线程解决方法：
//使用runOnUiThread方法刷新UIrunOnUiThread(new Runnable() { @Override public void run() { //刷新UI }});常见问题：
调用 LocationManager 获取当前位置信息并实时上传时，出现该错误的原因是 LocationManager 需要在主线程中使用。推荐如下方法：
@Overrideprotected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //上传位置信息 Button btnUploadGPS = (Button)findViewById(R.id.btn_upload_gps); if (btnUploadGPS != null){ btnUploadGPS .setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { uploadGPS(); } }); }}private void uploadGPS(){ final LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); locationManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, 2000, (float) 0.01, new LocationListener() { @Override public void onLocationChanged(Location location) { asyncUploadGPS(location); } @Override public void onStatusChanged(String provider, int status, Bundle extras) { } @Override public void onProviderEnabled(String provider) { asyncUploadGPS(locationManager.getLastKnownLocation(provider)); } @Override public void onProviderDisabled(String provider) { asyncUploadGPS(null); } } );}private void asyncUploadGPS(final Location currentLocation) { new Thread(new Runnable() { @Override public void run() { //上传位置信息 } }).start();}更多相关文章
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