我如何从GPS服务获取坐标到文本文件? [英] How do I get coordinates from a GPS service into a text file?
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问题描述
我是Android编程的新手。我粘贴的源代码不是我自己的,它来自Github项目。我想将GPS服务的坐标保存到文本文件中。有谁知道如何做到这一点?
public class MainActivity extends AppCompatActivity {
private Button btn_start, btn_stop;
公共按钮保存;
私有BroadcastReceiver broadcastReceiver;
int delay = 1000; //延迟1秒
int period = 10000; //每10秒重复一次。
定时器定时器=新的定时器();
public EditText editText;
public TextView textView;
public String path = Environment.getExternalStorageDirectory()。getAbsolutePath()+/ aaTutorial;
@Override
protected void onResume(){
super.onResume();
if(broadcastReceiver == null){
broadcastReceiver = new BroadcastReceiver(){
@Override
public void onReceive(Context context,Intent intent){
textView.append(\\\
+ intent.getExtras()。get(coordinates));
}
};
}
registerReceiver(broadcastReceiver,new IntentFilter(location_update));
@Override
protected void onDestroy(){
super.onDestroy();
if(broadcastReceiver!= null){
unregisterReceiver(broadcastReceiver);
}
}
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn_start =(Button)findViewById(R.id.button);
btn_stop =(Button)findViewById(R.id.button2);
textView =(TextView)findViewById(R.id.textView);
save =(Button)findViewById(R.id.save);
文件dir = new File(path);
dir.mkdirs();
if(!runtime_permissions())
enable_buttons();
$ b private void enable_buttons(){
btn_start.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View view){
Intent i = new Intent(getApplicationContext(),GPS_Service.class);
startService(i);
}
});
btn_stop.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View view){
Intent i = new Intent (getApplicationContext(),GPS_Service.class);
stopService(i);
}
}); (Build.VERSION.SDK_INT> = 23&&& ContextCompat.checkSelfPermission(this,Manifest。)。
$ b private boolean runtime_permissions(){
if (Package.PERMISSION_GRANTED)!= PackageManager.PERMISSION_GRANTED&&& ContextCompat.checkSelfPermission(this,Manifest.permission.ACCESS_COARSE_LOCATION)!= PackageManager.PERMISSION_GRANTED){
$ b requestPermissions(new String [] {Manifest.permission .ACCESS_FINE_LOCATION,Manifest.permission.ACCESS_COARSE_LOCATION},100);
返回true;
}
返回false;
$ b @Override
public void onRequestPermissionsResult(int requestCode,@NonNull String [] permissions,@NonNull int [] grantResults){
super .onRequestPermissionsResult(requestCode,permissions,grantResults);
if(requestCode == 100){
if(grantResults [0] == PackageManager.PERMISSION_GRANTED&&& amp; grantResults [1] == PackageManager.PERMISSION_GRANTED){
enable_buttons();
} else {
runtime_permissions();
}
}
}
}
解决方案使用
$ b
BufferedWriter
,并调用 BufferedWriter.write()
方法您的 BroadcastReceiver.onReceive()
。 $ b
假设您的当前代码有效,您可以在这里检查所需的更改:
BufferedWriter作家;
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
writer = new BufferedWriter(new FileWriter(mnt / sdcard / gps.txt));
// ...
}
@Override
protected void onResume(){
super.onResume();
if(broadcastReceiver == null){
broadcastReceiver = new BroadcastReceiver(){
@Override
public void onReceive(Context context,Intent intent){
textView.append(\\\
+ intent.getExtras()。get(coordinates));
writer.write(intent.getExtras()。get(coordinates));
writer.newLine();
}
};
}
registerReceiver(broadcastReceiver,new IntentFilter(location_update));
}
保护无效的onDestroy(){
super.onDestroy();
writer.close();
if(broadcastReceiver!= null){
unregisterReceiver(broadcastReceiver);
}
}
I am new to Android programming. The source code that I have pasted is not my own, it is from a Github project. I want to save the coordinates of a GPS service into a textfile. Does anyone know how to do this?
public class MainActivity extends AppCompatActivity {
private Button btn_start, btn_stop;
public Button save;
private BroadcastReceiver broadcastReceiver;
int delay = 1000; // delay for 1 sec.
int period = 10000; // repeat every 10 sec.
Timer timer = new Timer();
public EditText editText;
public TextView textView;
public String path = Environment.getExternalStorageDirectory().getAbsolutePath() + "/aaTutorial";
@Override
protected void onResume() {
super.onResume();
if(broadcastReceiver == null){
broadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
textView.append("\n" +intent.getExtras().get("coordinates"));
}
};
}
registerReceiver(broadcastReceiver,new IntentFilter("location_update"));
}
@Override
protected void onDestroy() {
super.onDestroy();
if(broadcastReceiver != null){
unregisterReceiver(broadcastReceiver);
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn_start = (Button) findViewById(R.id.button);
btn_stop = (Button) findViewById(R.id.button2);
textView = (TextView) findViewById(R.id.textView);
save = (Button) findViewById(R.id.save);
File dir = new File(path);
dir.mkdirs();
if(!runtime_permissions())
enable_buttons();
}
private void enable_buttons() {
btn_start.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent i =new Intent(getApplicationContext(),GPS_Service.class);
startService(i);
}
});
btn_stop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent i = new Intent(getApplicationContext(),GPS_Service.class);
stopService(i);
}
});
}
private boolean runtime_permissions() {
if(Build.VERSION.SDK_INT >= 23 && ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED){
requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION},100);
return true;
}
return false;
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if(requestCode == 100){
if( grantResults[0] == PackageManager.PERMISSION_GRANTED && grantResults[1] == PackageManager.PERMISSION_GRANTED){
enable_buttons();
}else {
runtime_permissions();
}
}
}
}
解决方案
Make use of a BufferedWriter
, and call BufferedWriter.write()
method inside your BroadcastReceiver.onReceive()
.
Assuming your current code works, here you can check the changes needed:
BufferedWriter writer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
writer = new BufferedWriter(new FileWriter("mnt/sdcard/gps.txt"));
//...
}
@Override
protected void onResume() {
super.onResume();
if(broadcastReceiver == null){
broadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
textView.append("\n" +intent.getExtras().get("coordinates"));
writer.write(intent.getExtras().get("coordinates"));
writer.newLine();
}
};
}
registerReceiver(broadcastReceiver,new IntentFilter("location_update"));
}
protected void onDestroy() {
super.onDestroy();
writer.close();
if(broadcastReceiver != null){
unregisterReceiver(broadcastReceiver);
}
}
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