Android で JavaScript を使ってみる

GPS 情報を取得してみる（書きかけ）

package hoge.hoge.com;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.widget.TextView;
import android.location.Location;
import android.location.LocationManager;

public class HelloActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        LocationManager locman = (LocationManager)this.getSystemService(Context.LOCATION_SERVICE);
        Location loc = locman.getLastKnownLocation(LOCATION_SERVICE);
        double latitude = loc.getLatitude();//緯度
        double longitude = loc.getLongitude();//経度
        
        TextView  tv = new TextView(this);
        tv.setText( "lat: " + latitude + ", long: " + longitude );
        setContentView(tv);
    }
}

JavaScript を使ってみる

assets/www/index.html の作成

<html>
<head>
    <script type="text/javascript">
      document.write(anroid.gps("<i>", "</i>"));
    </script>
</head>
<body>
<p>
Hello
</p>
</body>
</html>

src/hoge.hoge.com/JavaScriptObj.javaの作成
package hoge.hoge.com; import android.content.Context; import android.location.Location; import android.location.LocationManager; public class JavaScriptObj { private Context con; public JavaScriptObj(Context con) { this.con = con; } public String gps(String top, String end) { LocationManager locman = (LocationManager)con.getSystemService(Context.LOCATION_SERVICE); Location loc = locman.getLastKnownLocation(Context.LOCATION_SERVICE); double latitude = loc.getLatitude();//緯度 double longitude = loc.getLongitude();//経度 int lat = (int) (loc.getLatitude() * 1000000); int lon = (int) (loc.getLongitude() * 1000000); return top + "緯度:" + lat + ", 経度: " + lon + end; } }

src/hoge.hoge.com/HelloActivity.javaの編集
package hoge.hoge.com; import android.app.Activity; import android.content.Context; import android.os.Bundle; import android.webkit.WebView; import android.widget.TextView; public class HelloActivity extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); WebView wv = new WebView(this); wv.getSettings().setJavaScriptEnabled(true);//JS利用OK setContentView(wv); JavaScriptObj jo = new JavaScriptObj(this); wv.addJavascriptInterface(jo, "android"); wv.loadUrl("file:///android_asset/www/index.html"); } }