使用意圖(Intent)啟動 Android 內建谷歌地圖

通過意圖(Intent), 應用程序可啟動 Android 內建谷歌地圖; 指定地點及縮放程度. 下面是一個例子.

package com.AndroidIntentGoogleMaps;

import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.SeekBar;
import android.widget.Toast;

public class AndroidIntentGoogleMaps extends Activity {
 
 EditText inputLatitude, inputLongitude;
 SeekBar seekbarZoom;
 Button buttonStartMaps;
 
 final static float DEFAULT_Latitude = (float) 40.75773;
 final static float DEFAULT_Longitude = (float) -73.985708;
 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        inputLatitude = (EditText)findViewById(R.id.Latitude);
        inputLongitude = (EditText)findViewById(R.id.Longitude);
     seekbarZoom = (SeekBar)findViewById(R.id.zoom);
     buttonStartMaps = (Button)findViewById(R.id.startmaps);
     
     inputLatitude.setText(String.valueOf(DEFAULT_Latitude));
     inputLongitude.setText(String.valueOf(DEFAULT_Longitude));
     
     buttonStartMaps.setOnClickListener(new Button.OnClickListener(){

   @Override
   public void onClick(View arg0) {
    // TODO Auto-generated method stub
    String lat = inputLatitude.getText().toString();
    String lon = inputLongitude.getText().toString();
    String zoom = String.valueOf(seekbarZoom.getProgress()+1);
    String strUri = "geo:"+lat+","+lon+"?z="+zoom;
    
    Toast.makeText(AndroidIntentGoogleMaps.this, strUri, Toast.LENGTH_LONG).show();

    Intent intent = new Intent(android.content.Intent.ACTION_VIEW, Uri.parse(strUri));
    startActivity(intent);
   }});
     
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="Latitude" />
<EditText 
    android:id="@+id/Latitude" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" />
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="Longitude" />
<EditText 
    android:id="@+id/Longitude" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" />
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="Zoom" />
<SeekBar
    android:id="@+id/zoom" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:max="22" 
    android:padding="10dp" />
<Button
    android:id="@+id/startmaps" 
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="Start Google Maps" />
</LinearLayout>

相關文章:
- 使用意圖(Intent)啟動 Android 內建谷歌地圖的街景(StreetView)