问题
I'm creating an app which picks places from the Google maps and stores the address in the database. I also want to store the snapshot of the picked place in the storage, so I can display the data with corresponding snapshot.
When I select a place from the map, the place-picker activity shows the following dialog:
Here in the dialog, the address, latitude and longitude and also the snapshot is shown. I know how to get address and latLng. but don't know how to store that displayed snapshot.
Here is my method which retrieves everything other than that image:
//opening place picker activity.
protected void onActivityResult(int requestCode,
int resultCode, Intent data) {
if (requestCode == PLACE_PICKER_REQUEST
&& resultCode == Activity.RESULT_OK) {
final Place place = PlacePicker.getPlace(this, data);
final CharSequence name = place.getName();
final CharSequence address = place.getAddress();
String attributions = (String) place.getAttributions();
if (attributions == null) {
attributions = "";
}
tv4.setText(place.getLatLng().toString()+"\n"+name+"\n"+address+"\n"+attributions);
} else {
super.onActivityResult(requestCode, resultCode, data);
}
}
I don't know how to get the image and store it in external or internal storage. Is it possible? I've to take snapshot as explained in this link?
EDIT
I have the following activity, which is calling activity of place-picker:
Main2Activity.java:
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.support.v4.app.NavUtils;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import com.google.android.gms.common.GooglePlayServicesNotAvailableException;
import com.google.android.gms.common.GooglePlayServicesRepairableException;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.places.Place;
import com.google.android.gms.location.places.ui.PlacePicker;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.MapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.LatLngBounds;
import android.database.Cursor;
import android.widget.EditText;
import android.widget.Toast;
import com.google.android.gms.maps.OnMapReadyCallback;
import java.io.File;
import java.io.FileOutputStream;
import java.util.Date;
public class Main2Activity extends AppCompatActivity implements OnMapReadyCallback{
private static final int PLACE_PICKER_REQUEST = 1;
private TextView mName;
private TextView mAddress;
private TextView mAttributions;
private GoogleApiClient mGoogleApiClient;
public TextView tv4;
private static final LatLngBounds BOUNDS_MOUNTAIN_VIEW = new LatLngBounds(
new LatLng(37.398160, -122.180831), new LatLng(37.430610, -121.972090));
private Toolbar toolbar;
private GoogleMap mMap;
private boolean flag = false;
DatabaseHelper myDb;
EditText newevent;
Button submit;
Button viewremainders;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
MapFragment mapFragment = (MapFragment) getFragmentManager() .findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
myDb =new DatabaseHelper(this);
newevent=(EditText)findViewById(R.id.newEvent);
submit=(Button)findViewById(R.id.submit);
viewremainders=(Button)findViewById(R.id.view);
toolbar = (Toolbar)findViewById(R.id.app_bar0);
setSupportActionBar(toolbar);
getSupportActionBar().setHomeButtonEnabled(true); //for back button to main activity.
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
Button pickerButton = (Button) findViewById(R.id.pickerButton);
tv4 = (TextView)findViewById(R.id.textView4);
pickerButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
try {
PlacePicker.IntentBuilder intentBuilder =
new PlacePicker.IntentBuilder();
intentBuilder.setLatLngBounds(BOUNDS_MOUNTAIN_VIEW);
Intent intent = intentBuilder.build(Main2Activity.this);
startActivityForResult(intent, PLACE_PICKER_REQUEST);
} catch (GooglePlayServicesRepairableException
| GooglePlayServicesNotAvailableException e) {
e.printStackTrace();
}
}
});
AddData();
viewremainders();
}
@Override
public void onMapReady(GoogleMap map) {
mMap = map;
}
//method for adding data in Database.
public void AddData(){
submit.setOnClickListener(
new View.OnClickListener(){
@Override
public void onClick(View v){
boolean isInserted =myDb.insertData(newevent.getText().toString(),tv4.getText().toString());
if(isInserted==true)
Toast.makeText(Main2Activity.this,"Data Inserted",Toast.LENGTH_LONG).show();
else
Toast.makeText(Main2Activity.this,"Data not Inserted",Toast.LENGTH_LONG).show();
}
}
);
}
//Method for view all data from database.
public void viewremainders(){
viewremainders.setOnClickListener(
new View.OnClickListener(){
@Override
public void onClick(View v){
Cursor res= myDb.getAllData();
if(res.getCount()==0)
{
Showmessage("Error","No remainders found");
return;
}
StringBuffer buffer=new StringBuffer();
while(res.moveToNext())
{
buffer.append("Id : " +res.getString(0)+"\n");
buffer.append("Event : " +res.getString(1)+"\n");
buffer.append("Location : " +res.getString(2)+"\n");
}
Showmessage("Data",buffer.toString());
}
}
);
}
public void Showmessage(String title,String message)
{
AlertDialog.Builder builder=new AlertDialog.Builder(this);
builder.setCancelable(true);
builder.setTitle(title);
builder.setMessage(message);
builder.show();
}
//opening place picker activity.
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == PLACE_PICKER_REQUEST
&& resultCode == Activity.RESULT_OK) {
final Place place = PlacePicker.getPlace(this, data);
final CharSequence name = place.getName();
final CharSequence address = place.getAddress();
String attributions = (String) place.getAttributions();
if (attributions == null) {
attributions = "";
}
// tv4.setText(place.getLatLng().toString()+"\n"+name+"\n"+address+"\n"+attributions); To get latitide and longitudes.
tv4.setText(address+"\n"+attributions);
/* LatLngBounds selectedPlaceBounds = PlacePicker.getLatLngBounds(data);
// move camera to selected bounds
CameraUpdate camera = CameraUpdateFactory.newLatLngBounds(selectedPlaceBounds,0);
mMap.moveCamera(camera);
// take snapshot and implement the snapshot ready callback
mMap.snapshot(new GoogleMap.SnapshotReadyCallback() {
Bitmap bitmap=null;
public void onSnapshotReady(Bitmap snapshot) {
// handle snapshot here
bitmap = snapshot;
try {
FileOutputStream out = new FileOutputStream(Environment.getExternalStorageDirectory().toString()+"/ing.png");
bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
Toast.makeText(Main2Activity.this,"dsfds",Toast.LENGTH_LONG).show();
} catch (Exception e) {
Toast.makeText(Main2Activity.this,e.toString(),Toast.LENGTH_SHORT).show();
e.printStackTrace();
}
}
});*/
} else {
super.onActivityResult(requestCode, resultCode, data);
}
}
private void capture(){
try {
// image naming and path to include sd card appending name you choose for file
String mPath = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_MOVIES).toString();
// create bitmap screen capture
View v1 = getWindow().getDecorView().getRootView();
v1.setDrawingCacheEnabled(true);
Bitmap bitmap = Bitmap.createBitmap(v1.getDrawingCache());
v1.setDrawingCacheEnabled(false);
File imageFile = new File(Environment.getExternalStorageDirectory().toString()+"/"+"lllll.jpg");
FileOutputStream outputStream = new FileOutputStream(imageFile);
int quality = 100;
bitmap.compress(Bitmap.CompressFormat.JPEG, quality, outputStream);
outputStream.flush();
outputStream.close();
openScreenshot(imageFile);
} catch (Throwable e) {
// Several error may come out with file handling or OOM
e.printStackTrace();
}
}
private void openScreenshot(File imageFile) {
Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
Uri uri = Uri.fromFile(imageFile);
intent.setDataAndType(uri, "image/*");
startActivity(intent);
}
//Methods for toolbar
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main2, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
if(id == android.R.id.home){
NavUtils.navigateUpFromSameTask(this);
}
return super.onOptionsItemSelected(item);
}
}
回答1:
Since you are able to get the long and lat coordinates, you can get the map image by using the Google maps api.
Here's the link with examples and docs:
https://developers.google.com/maps/documentation/static-maps/intro
I assume this is what the dialog is doing in the background.
If that does not work, or you want something more exact, I suggest using Wireshark to monitor exactly what data is being sent and received.
I just ran a test with your map locations, and with this url:
https://maps.googleapis.com/maps/api/staticmap?center=37.430610,%20-121.972090&zoom=17&size=400x400&key=[myAPIKey]
I got this image:
Using the coords from your dialog:
Using https://maps.googleapis.com/maps/api/staticmap?markers=37.414333,-122.076444&zoom=17&size=400x250&key=[myKey]
回答2:
You can use the GoogleMap.SnapshotReadyCallback interface.
Here is a code example on how to use it:
SnapshotReadyCallback callback = new SnapshotReadyCallback() {
Bitmap bitmap;
@Override
public void onSnapshotReady(Bitmap snapshot) {
bitmap = snapshot;
try {
FileOutputStream out = new FileOutputStream("/some/where/to/save/it/thesnapshot.png");
bitmap.compress(Bitmap.CompressFormat.PNG, 90, out);
} catch (Exception e) {
e.printStackTrace();
}
}
};
map.snapshot(callback);
You can add this in your code when you show the dialog and in the same time save the snapshot. Read more about it in the link above.
I hope this will be of any help to you and good luck.
回答3:
If you want to show snapshot of the picked place in the dialog first you have to save the screen of map view into bitmap.
Refer this code to converting your map view into bitmap
Bitmap screen;
View v1 = MyView.getRootView();
v1.setDrawingCacheEnabled(true);
screen= Bitmap.createBitmap(v1.getDrawingCache());
v1.setDrawingCacheEnabled(false);
From above code you can get Bitmap which You can further use in your Dialog box by setting this bitmap into image view. But keep in mind u have to perform all operation before generating dialog and on worker thread.
回答4:
You might look into maps Lite. It uses the google maps api and map views, but treats each one similar to an image rather than an interactive map. You can still choose your zoom level and add markers to the map.
declare the map in your xml like you would a regular google map fragment but include the tag map:liteMode="true"
<fragment xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:map="http://schemas.android.com/apk/res-auto"
android:name="com.google.android.gms.maps.MapFragment"
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent"
map:cameraZoom="13"
map:mapType="normal"
map:liteMode="true"/>
or if you're creating the map programmatically you can use
GoogleMapOptions options = new GoogleMapOptions().liteMode(true);
it looks from your Activity code like you know how set up a google map, so you can then modify your onActivityResult to look like this
protected void onActivityResult(int requestCode,
int resultCode, Intent data) {
if (requestCode == PLACE_PICKER_REQUEST
&& resultCode == Activity.RESULT_OK) {
final Place place = PlacePicker.getPlace(this, data);
final CharSequence name = place.getName();
final CharSequence address = place.getAddress();
String attributions = (String) place.getAttributions();
if (attributions == null) {
attributions = "";
}
tv4.setText(place.getLatLng().toString()+"\n"+name+"\n"+address+"\n"+attributions);
// Add this line to make the lite map show the location you just chose
// and set the zoom level (10f is arbitrary)
mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(place.getLatLng(), 10f));
} else {
super.onActivityResult(requestCode, resultCode, data);
}
}
More information and citations:
You can start here if you're looking for more info, there are tons of good links on this page https://developers.google.com/maps/documentation/android-api/lite
you can also check out the Google Lite Maps Demo Activity here: https://github.com/googlemaps/android-samples/blob/master/ApiDemos/app/src/main/java/com/example/mapdemo/LiteDemoActivity.java
And here's a great video that explains Lite Maps really well: https://youtu.be/N0N1Xkc_1pU
回答5:
I faced same issue. I've tried with API key and Server key in both case I faced same error like "The Google Maps API server rejected your request... ". Finally I noticed that "Google Static Maps API" was disable from console. I just enable and everything works fine.
来源：https://stackoverflow.com/questions/39016285/how-to-retrieve-snapshot-of-map-from-place-picker-activity