如何从 StringBuilder 获取值并将其传递给另一个 activity？
How to get value from StringBuilder and pass it to another activity?
我有一个 StringBuilder 变量，我想从中获取最终值并将其传递给另一个 activity。我想在编辑文本视图中显示最终的字符串值。
我尝试使用 toString() 方法获取值，但我无法在空白文本视图中看到该值。
String value=str.toString();
intent.putExtra("value",value);
startActivity(intent);
通过这个我得到了价值并发送到第二个activity。
Intent intent = this.getIntent();
String data = intent.getStringExtra("keyName");
edtxt_from.setText(data);
使用这个我得到了第二个 activity 中的值。
怎么了？？
请帮忙...
我在编辑文本视图中没有得到更新的地址..
ChooseFromMapActivity
public class ChooseFromMapActivity 扩展 AppCompatActivity 实现
位置监听器，GoogleApiClient.ConnectionCallbacks，
GoogleApiClient.OnConnectionFailedListener {
private LocationRequest mLocationRequest;
GoogleMap mGoogleMap;
private GoogleApiClient mGoogleApiClient;
boolean mUpdatesRequested = false;
private LatLng center;
private LinearLayout markerLayout;
private Geocoder geocoder;
private List<Address> addresses;
private TextView Address;
double latitude;
double longitude;
private GPSTracker gps;
private LatLng curentpoint;
private LinearLayout useLocation;
Intent intent;
double x, y;
StringBuilder str;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_choose_from_map);
Address = (TextView) findViewById(R.id.textShowAddress);
markerLayout = (LinearLayout) findViewById(R.id.locationMarker);
useLocation = (LinearLayout)findViewById(R.id.LinearUseLoc);
int status = GooglePlayServicesUtil
.isGooglePlayServicesAvailable(getBaseContext());
if (status != ConnectionResult.SUCCESS) { // Google Play Services are
// not available
int requestCode = 10;
Dialog dialog = GooglePlayServicesUtil.getErrorDialog(status, this,
requestCode);
dialog.show();
} else { // Google Play Services are available
// Getting reference to the SupportMapFragment
// Create a new global location parameters object
mLocationRequest = LocationRequest.create();
/*
* Set the update interval
*/
mLocationRequest.setInterval(GData.UPDATE_INTERVAL_IN_MILLISECONDS);
// Use high accuracy
mLocationRequest
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
// Set the interval ceiling to one minute
mLocationRequest
.setFastestInterval(GData.FAST_INTERVAL_CEILING_IN_MILLISECONDS);
// Note that location updates are off until the user turns them on
mUpdatesRequested = false;
/*
* Create a new location client, using the enclosing class to handle
* callbacks.
*/
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API).addConnectionCallbacks(this)
.addOnConnectionFailedListener(this).build();
mGoogleApiClient.connect();
}
useLocation.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
intent = new Intent(ChooseFromMapActivity.this,GoSend.class);
String value=str.toString();
intent.putExtra("value",value);
}
});
}
private void stupMap() {
try {
mGoogleMap = ((MapFragment) getFragmentManager().findFragmentById(
R.id.map)).getMap();
// Enabling MyLocation in Google Map
mGoogleMap.setMyLocationEnabled(true);
mGoogleMap.getUiSettings().setZoomControlsEnabled(true);
mGoogleMap.getUiSettings().setMyLocationButtonEnabled(true);
mGoogleMap.getUiSettings().setCompassEnabled(true);
mGoogleMap.getUiSettings().setRotateGesturesEnabled(true);
mGoogleMap.getUiSettings().setZoomGesturesEnabled(true);
gps = new GPSTracker(this);
gps.canGetLocation();
latitude = gps.getLatitude();
longitude = gps.getLongitude();
curentpoint = new LatLng(latitude, longitude);
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(curentpoint).zoom(19f).tilt(70).build();
mGoogleMap.setMyLocationEnabled(true);
mGoogleMap.animateCamera(CameraUpdateFactory
.newCameraPosition(cameraPosition));
// Clears all the existing markers
mGoogleMap.clear();
mGoogleMap.setOnCameraChangeListener(new OnCameraChangeListener() {
@Override
public void onCameraChange(CameraPosition arg0) {
// TODO Auto-generated method stub
center = mGoogleMap.getCameraPosition().target;
mGoogleMap.clear();
markerLayout.setVisibility(View.VISIBLE);
try {
new GetLocationAsync(center.latitude, center.longitude)
.execute();
} catch (Exception e) {
}
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
}
@Override
public void onConnectionFailed(ConnectionResult arg0) {
// TODO Auto-generated method stub
}
@Override
public void onConnected(Bundle arg0) {
// TODO Auto-generated method stub
stupMap();
}
private class GetLocationAsync extends AsyncTask<String, Void, String> {
// boolean duplicateResponse;
public GetLocationAsync(double latitude, double longitude) {
// TODO Auto-generated constructor stub
x = latitude;
y = longitude;
}
@Override
protected String doInBackground(String... params) {
try {
geocoder = new Geocoder(ChooseFromMapActivity.this, Locale.ENGLISH);
addresses = geocoder.getFromLocation(x, y, 1);
str = new StringBuilder();
if (Geocoder.isPresent()) {
if ((addresses != null) && (addresses.size() > 0)) {
Address returnAddress = addresses.get(0);
String localityString = returnAddress.getLocality();
String city = returnAddress.getCountryName();
String region_code = returnAddress.getCountryCode();
String zipcode = returnAddress.getPostalCode();
str.append(localityString + "");
str.append(city + "" + region_code + "");
str.append(zipcode + "");
}
} else {
}
} catch (IOException e) {
Log.e("tag", e.getMessage());
}
return null;
}
@Override
protected void onPostExecute(String result) {
try {
Address.setText(addresses.get(0).getAddressLine(0)
+ addresses.get(0).getAddressLine(1) + " ");
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
protected void onProgressUpdate(Void... values) {
}
}
@Override
public void onConnectionSuspended(int arg0) {
// TODO Auto-generated method stub
}
}
去发送
public class GoSend extends AppCompatActivity {
LatLng latLng;
private GoogleMap mMap;
MarkerOptions markerOptions;
LinearLayout ll;
Toolbar toolbar;
EditText editTextLocation;
EditText edtxt_from;
EditText edtxt_to;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gosendlayout);
Location l=new Location();
setUI();
if (Build.VERSION.SDK_INT >= 21) {
getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
getWindow().setStatusBarColor(getResources().getColor(R.color.colorPrimaryDark));
}
//Bundle bundle = getIntent().getParcelableExtra("bundle");
// double fromPosition = bundle.getParcelable("from_position");
// edtxt_from.setText(fromPosition);
/* Bundle extras = getIntent().getExtras();
if (extras != null) {
double latitude = extras.getDouble("latitude");
double longitude = extras.getDouble("Longitude");
edtxt_from.setText(String.valueOf(latitude));*/
Intent intent = this.getIntent();
String data = intent.getStringExtra("value");
edtxt_from.setText(data);
// Bundle bundle = intent.getExtras();
// Serializable value =bundle.getSerializable("value");
// edtxt_from.setText(String.valueOf(longitude));
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
// Respond to the action bar's Up/Home button
case android.R.id.home:
NavUtils.navigateUpFromSameTask(this);
return true;
}
return super.onOptionsItemSelected(item);
}
public void setUI() {
ll = (LinearLayout) findViewById(R.id.LinearLayoutGoSend);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setTitle("GO-SEND");
try {
if (mMap == null) {
mMap = ((MapFragment) getFragmentManager().
findFragmentById(R.id.map)).getMap();
}
mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
LatLng sydney = new LatLng(-34, 151);
mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
mMap.setMyLocationEnabled(true);
} catch (Exception e) {
e.printStackTrace();
}
edtxt_from=(EditText)findViewById(R.id.editText_from);
edtxt_to=(EditText)findViewById(R.id.editText_to);
edtxt_from.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i=new Intent(getApplicationContext(),PickLocationActivity.class);
startActivity(i);
}
});
edtxt_to.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i=new Intent(getApplicationContext(),PickLocationActivity.class);
startActivity(i);
}
});
}
}
改变
String data = intent.getStringExtra("keyName");
至
String data = intent.getStringExtra("value");
您使用了错误的密钥。
简单地做：
将 keyName 替换为 value
我有一个 StringBuilder 变量，我想从中获取最终值并将其传递给另一个 activity。我想在编辑文本视图中显示最终的字符串值。
我尝试使用 toString() 方法获取值，但我无法在空白文本视图中看到该值。
String value=str.toString();
intent.putExtra("value",value);
startActivity(intent);
通过这个我得到了价值并发送到第二个activity。
Intent intent = this.getIntent();
String data = intent.getStringExtra("keyName");
edtxt_from.setText(data);
使用这个我得到了第二个 activity 中的值。
怎么了？？ 请帮忙...
我在编辑文本视图中没有得到更新的地址..
ChooseFromMapActivity
public class ChooseFromMapActivity 扩展 AppCompatActivity 实现 位置监听器，GoogleApiClient.ConnectionCallbacks， GoogleApiClient.OnConnectionFailedListener {
private LocationRequest mLocationRequest;
GoogleMap mGoogleMap;
private GoogleApiClient mGoogleApiClient;
boolean mUpdatesRequested = false;
private LatLng center;
private LinearLayout markerLayout;
private Geocoder geocoder;
private List<Address> addresses;
private TextView Address;
double latitude;
double longitude;
private GPSTracker gps;
private LatLng curentpoint;
private LinearLayout useLocation;
Intent intent;
double x, y;
StringBuilder str;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_choose_from_map);
Address = (TextView) findViewById(R.id.textShowAddress);
markerLayout = (LinearLayout) findViewById(R.id.locationMarker);
useLocation = (LinearLayout)findViewById(R.id.LinearUseLoc);
int status = GooglePlayServicesUtil
.isGooglePlayServicesAvailable(getBaseContext());
if (status != ConnectionResult.SUCCESS) { // Google Play Services are
// not available
int requestCode = 10;
Dialog dialog = GooglePlayServicesUtil.getErrorDialog(status, this,
requestCode);
dialog.show();
} else { // Google Play Services are available
// Getting reference to the SupportMapFragment
// Create a new global location parameters object
mLocationRequest = LocationRequest.create();
/*
* Set the update interval
*/
mLocationRequest.setInterval(GData.UPDATE_INTERVAL_IN_MILLISECONDS);
// Use high accuracy
mLocationRequest
.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
// Set the interval ceiling to one minute
mLocationRequest
.setFastestInterval(GData.FAST_INTERVAL_CEILING_IN_MILLISECONDS);
// Note that location updates are off until the user turns them on
mUpdatesRequested = false;
/*
* Create a new location client, using the enclosing class to handle
* callbacks.
*/
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(LocationServices.API).addConnectionCallbacks(this)
.addOnConnectionFailedListener(this).build();
mGoogleApiClient.connect();
}
useLocation.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
intent = new Intent(ChooseFromMapActivity.this,GoSend.class);
String value=str.toString();
intent.putExtra("value",value);
}
});
}
private void stupMap() {
try {
mGoogleMap = ((MapFragment) getFragmentManager().findFragmentById(
R.id.map)).getMap();
// Enabling MyLocation in Google Map
mGoogleMap.setMyLocationEnabled(true);
mGoogleMap.getUiSettings().setZoomControlsEnabled(true);
mGoogleMap.getUiSettings().setMyLocationButtonEnabled(true);
mGoogleMap.getUiSettings().setCompassEnabled(true);
mGoogleMap.getUiSettings().setRotateGesturesEnabled(true);
mGoogleMap.getUiSettings().setZoomGesturesEnabled(true);
gps = new GPSTracker(this);
gps.canGetLocation();
latitude = gps.getLatitude();
longitude = gps.getLongitude();
curentpoint = new LatLng(latitude, longitude);
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(curentpoint).zoom(19f).tilt(70).build();
mGoogleMap.setMyLocationEnabled(true);
mGoogleMap.animateCamera(CameraUpdateFactory
.newCameraPosition(cameraPosition));
// Clears all the existing markers
mGoogleMap.clear();
mGoogleMap.setOnCameraChangeListener(new OnCameraChangeListener() {
@Override
public void onCameraChange(CameraPosition arg0) {
// TODO Auto-generated method stub
center = mGoogleMap.getCameraPosition().target;
mGoogleMap.clear();
markerLayout.setVisibility(View.VISIBLE);
try {
new GetLocationAsync(center.latitude, center.longitude)
.execute();
} catch (Exception e) {
}
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void onLocationChanged(Location location) {
// TODO Auto-generated method stub
}
@Override
public void onConnectionFailed(ConnectionResult arg0) {
// TODO Auto-generated method stub
}
@Override
public void onConnected(Bundle arg0) {
// TODO Auto-generated method stub
stupMap();
}
private class GetLocationAsync extends AsyncTask<String, Void, String> {
// boolean duplicateResponse;
public GetLocationAsync(double latitude, double longitude) {
// TODO Auto-generated constructor stub
x = latitude;
y = longitude;
}
@Override
protected String doInBackground(String... params) {
try {
geocoder = new Geocoder(ChooseFromMapActivity.this, Locale.ENGLISH);
addresses = geocoder.getFromLocation(x, y, 1);
str = new StringBuilder();
if (Geocoder.isPresent()) {
if ((addresses != null) && (addresses.size() > 0)) {
Address returnAddress = addresses.get(0);
String localityString = returnAddress.getLocality();
String city = returnAddress.getCountryName();
String region_code = returnAddress.getCountryCode();
String zipcode = returnAddress.getPostalCode();
str.append(localityString + "");
str.append(city + "" + region_code + "");
str.append(zipcode + "");
}
} else {
}
} catch (IOException e) {
Log.e("tag", e.getMessage());
}
return null;
}
@Override
protected void onPostExecute(String result) {
try {
Address.setText(addresses.get(0).getAddressLine(0)
+ addresses.get(0).getAddressLine(1) + " ");
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
protected void onProgressUpdate(Void... values) {
}
}
@Override
public void onConnectionSuspended(int arg0) {
// TODO Auto-generated method stub
}
}
去发送
public class GoSend extends AppCompatActivity {
LatLng latLng;
private GoogleMap mMap;
MarkerOptions markerOptions;
LinearLayout ll;
Toolbar toolbar;
EditText editTextLocation;
EditText edtxt_from;
EditText edtxt_to;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gosendlayout);
Location l=new Location();
setUI();
if (Build.VERSION.SDK_INT >= 21) {
getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
getWindow().setStatusBarColor(getResources().getColor(R.color.colorPrimaryDark));
}
//Bundle bundle = getIntent().getParcelableExtra("bundle");
// double fromPosition = bundle.getParcelable("from_position");
// edtxt_from.setText(fromPosition);
/* Bundle extras = getIntent().getExtras();
if (extras != null) {
double latitude = extras.getDouble("latitude");
double longitude = extras.getDouble("Longitude");
edtxt_from.setText(String.valueOf(latitude));*/
Intent intent = this.getIntent();
String data = intent.getStringExtra("value");
edtxt_from.setText(data);
// Bundle bundle = intent.getExtras();
// Serializable value =bundle.getSerializable("value");
// edtxt_from.setText(String.valueOf(longitude));
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
// Respond to the action bar's Up/Home button
case android.R.id.home:
NavUtils.navigateUpFromSameTask(this);
return true;
}
return super.onOptionsItemSelected(item);
}
public void setUI() {
ll = (LinearLayout) findViewById(R.id.LinearLayoutGoSend);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setTitle("GO-SEND");
try {
if (mMap == null) {
mMap = ((MapFragment) getFragmentManager().
findFragmentById(R.id.map)).getMap();
}
mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
LatLng sydney = new LatLng(-34, 151);
mMap.addMarker(new MarkerOptions().position(sydney).title("Marker in Sydney"));
mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
mMap.setMyLocationEnabled(true);
} catch (Exception e) {
e.printStackTrace();
}
edtxt_from=(EditText)findViewById(R.id.editText_from);
edtxt_to=(EditText)findViewById(R.id.editText_to);
edtxt_from.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i=new Intent(getApplicationContext(),PickLocationActivity.class);
startActivity(i);
}
});
edtxt_to.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent i=new Intent(getApplicationContext(),PickLocationActivity.class);
startActivity(i);
}
});
}
}
改变
String data = intent.getStringExtra("keyName");
至
String data = intent.getStringExtra("value");
您使用了错误的密钥。
简单地做： 将 keyName 替换为 value