Question

我正在创建一个应用程序，用于从Google地图中选择地点并将地址存储在数据库中。我还想将所选位置的快照存储在存储中，这样我就可以显示带有相应快照的数据。

当我从地图中选择一个地点时，地方选择器活动会显示以下对话框：

此处在对话框中，显示地址，纬度和经度以及快照。我知道如何获取地址和latLng。但不知道如何存储显示的快照。

这是我的方法，它检索除该图像以外的所有内容：

  //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中。可能吗？我按照this link?

中的说明拍摄快照

修改

我有以下活动，即调用地方选择器的活动：

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);
}
}

Answer 1

由于您可以获得长坐标和纬度坐标，因此您可以使用Google maps api获取地图图像。

以下是与示例和文档的链接：

https://developers.google.com/maps/documentation/static-maps/intro

我认为这是对话框在后台进行的操作。

如果这不起作用，或者你想要更精确的东西，我建议使用Wireshark来监控发送和接收的数据。

我刚刚使用您的地图位置进行了测试，并使用此网址：

transaction_id

我得到了这张图片：

使用对话框中的坐标：

使用https://maps.googleapis.com/maps/api/staticmap?center=37.430610,%20-121.972090&zoom=17&size=400x400&key=[myAPIKey]

Answer 2

您可以使用GoogleMap.SnapshotReadyCallback 接口

以下是有关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在代码中添加此内容，同时保存快照。在上面的链接中阅读更多相关信息。

我希望这对你有任何帮助，祝你好运。

Answer 3

如果要首先在对话框中显示拾取位置的快照，则必须将地图视图的屏幕保存到位图中。

请参阅此代码，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);

从上面的代码中，您可以通过将此位图设置为图像视图来获取您可以在对话框中进一步使用的位图。但请记住，在生成对话框和工作线程之前，您必须执行所有操作。

Answer 4

您可以查看maps Lite。它使用谷歌地图api和地图视图，但每个视图都与图像相似，而不是交互式地图。您仍然可以选择缩放级别并将标记添加到地图中。

在xml中声明地图，就像使用普通的Google地图片段一样但包括标签映射：liteMode =＆＃34; true＆＃34;

<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"/>

或者如果您以编程方式创建地图，则可以使用

GoogleMapOptions options = new GoogleMapOptions().liteMode(true);

它从您的活动代码中看起来就像您知道如何设置谷歌地图，因此您可以修改您的onActivityResult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);
}
}

更多信息和引用：

如果您正在寻找更多信息，可以从这里开始，此页面上有很多好的链接 https://developers.google.com/maps/documentation/android-api/lite

您还可以在此处查看Google Lite地图演示活动： https://github.com/googlemaps/android-samples/blob/master/ApiDemos/app/src/main/java/com/example/mapdemo/LiteDemoActivity.java

这是一个很棒的视频，可以很好地解释精简版地图：https://youtu.be/N0N1Xkc_1pU

Answer 5

我遇到了同样的问题。我已尝试使用API密钥和服务器密钥，但在这两种情况下我都遇到了与＃34相同的错误; Google Maps API服务器拒绝了您的请求...＆＃34;。最后，我注意到＆＃34; Google Static Maps API＆＃34; 已从控制台禁用。我只是启用，一切正常。

如何从地方选择器活动中检索地图的快照？

5 个答案: