Java 如何从地点选取器活动中检索地图快照?
我正在创建一个应用程序,它从谷歌地图中选择位置并将地址存储在数据库中。我还想将拾取地点的快照存储在存储器中,以便可以显示具有相应快照的数据 从地图中选择地点时,“地点选择器”活动将显示以下对话框: 在此对话框中,将显示地址、纬度和经度以及快照。我知道如何得到地址和地址。但不知道如何存储显示的快照 以下是我检索除该图像以外的所有内容的方法:Java 如何从地点选取器活动中检索地图快照?,java,android,google-maps,snapshot,Java,Android,Google Maps,Snapshot,我正在创建一个应用程序,它从谷歌地图中选择位置并将地址存储在数据库中。我还想将拾取地点的快照存储在存储器中,以便可以显示具有相应快照的数据 从地图中选择地点时,“地点选择器”活动将显示以下对话框: 在此对话框中,将显示地址、纬度和经度以及快照。我知道如何得到地址和地址。但不知道如何存储显示的快照 以下是我检索除该图像以外的所有内容的方法: //opening place picker activity. protected void onActivityResult(int request
//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);
}
}
我不知道如何获取图像并将其存储在外部或内部存储器中。可能吗?我必须按照中的说明拍摄快照
编辑
我有以下活动,这是调用位置选择器的活动:
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);
}
}
如果您想首先在对话框中显示拾取地点的快照,必须将地图视图屏幕保存到位图中 请参阅此代码以将地图视图转换为位图
Bitmap screen;
View v1 = MyView.getRootView();
v1.setDrawingCacheEnabled(true);
screen= Bitmap.createBitmap(v1.getDrawingCache());
v1.setDrawingCacheEnabled(false);
从上面的代码可以得到位图,通过将该位图设置为“图像视图”,可以在对话框中进一步使用该位图。
但是请记住,在生成对话框和工作线程之前,您必须执行所有操作。由于您能够获得长坐标和纬度坐标,因此可以使用Google maps api获得地图图像 以下是示例和文档的链接: 我假设这就是对话框在后台所做的 如果这不起作用,或者您想要更精确的东西,我建议使用Wireshark来精确监控发送和接收的数据 我刚刚对您的地图位置和以下url进行了测试:
https://maps.googleapis.com/maps/api/staticmap?center=37.430610,%20-121.972090&zoom=17&size=400x400&key=[myAPIKey]
我得到了这个图像:
使用对话框中的坐标:
使用https://maps.googleapis.com/maps/api/staticmap?markers=37.414333,-122.076444&zoom=17&size=400x250&key=[myKey]
您可以使用
接口
下面是一个关于如何使用它的代码示例:
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);
您可以在显示对话框时将其添加到代码中,同时保存快照。在上面的链接中阅读更多关于它的信息
我希望这将对您有所帮助并祝您好运。您可以查看maps Lite。它使用GoogleMapsAPI和地图视图,但将每个视图视为类似于图像,而不是交互式地图。您仍然可以选择缩放级别并向地图添加标记 用xml声明地图,就像使用常规的google地图片段一样 但包括标记映射:liteMode=“true” 从您的活动代码看,您似乎知道如何设置google地图,因此您可以修改onActivityResult,使其看起来像这样
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);
}
}
更多信息和引文:
如果你想了解更多信息,可以从这里开始,这个页面上有很多不错的链接
您还可以在此处查看Google Lite地图演示活动:
这里有一个很好的视频可以很好地解释Lite地图:我也遇到了同样的问题。我试过使用API密钥和服务器密钥,在这两种情况下,我都遇到了相同的错误,比如“Google Maps API服务器拒绝了您的请求…”。最后我注意到,“谷歌静态地图API”在控制台中被禁用。我只需启用,一切正常 我们可以拍摄任何视图的快照,但是我们应该有视图引用。但是我们不能检索此图片作为地址、纬度和经度吗@Sohailzahid您关注哪个链接发送给我我可能会帮助您?您可以使用任何其他地点选择器和谷歌?和谷歌?你这是什么意思?调用时我从这个方法传递了哪个视图?你不必使用下面的代码,因为我已经编辑了答案,并且你已经从那里获得了位图。使用该位图在imageview中进行设置。当你在任何单击上打开你的对话框,然后在相同的单击上,你必须在创建对话框之前执行所有这些操作。请增加计数器如果是我的回答,我会减少计数器。但是名声不够好。嘿,谢谢你的回答。事实上我想要这张地图的照片:::你能给我一些建议吗?我想你的链接包含了这种类型的照片。是的!就这样!但是有一个小问题。上面说,
谷歌地图API服务器拒绝了你的请求。此API项目无权使用此API。请确保在Google开发者控制台中激活此API:https://console.developers.google.com/apis/api/static_maps_backend?project=_
获取我的API密钥。谢谢您的回答。请解决这个问题,我会接受答案。您可能需要一个不同的密钥。在该页面的左侧,有一个获取新api密钥的链接。试试看。为不同的目的使用两个不同的键应该是可以的。
GoogleMapOptions options = new GoogleMapOptions().liteMode(true);
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);
}
}