使用phonegap打开Android位置设置

时间:2014-03-05 09:16:59

标签: android cordova geolocation phonegap-plugins

我正在通过phonegap使用用户的地理位置。这个例子如下所示。 (机器人)

  // onSuccess Callback
    // This method accepts a Position object, which contains the
    // current GPS coordinates
    //
    var onSuccess = function(position) {
        var element = document.getElementById('geolocation');
        element.innerHTML = 'Latitude: '+ position.coords.latitude         +'<br/>' +
               'Longitude: '            + position.coords.longitude        +<br/>' +
               'Altitude: '             + position.coords.altitude         +'<br/>' +
               'Accuracy: '             + position.coords.accuracy         +<br/>' +
               'Altitude Accuracy: '    + position.coords.altitudeAccuracy +'<br/>' +
               'Heading: '              + position.coords.heading          +<br/>' +
                'timestamp: '            + position.timestamp              +<br/>';
    };

    // onError Callback receives a PositionError object
    //
    function onError(error) {
        alert('code: '    + error.code    + '\n' +
              'message: ' + error.message + '\n');
    }

    navigator.geolocation.getCurrentPosition(onSuccess, onError);

是否可以(使用phonegap)在错误功能上打开对话框,这将导致我们进行位置设置(用户将能够访问他的位置)而不是警报,因为它是在谷歌地图android应用程序中完成的(截图下方)? like this

2 个答案:

答案 0 :(得分:0)

我正在做你正在说的话,创建对话框,然后将它们发送到设置中;我假设您已经设法在apropos时间调用onError fcn,那么

AlertDialog.Builder builder = new AlertDialog.Builder(context);
    builder.setTitle(getString(R.string.loc_man));
    builder.setMessage(getString(R.string.ask_for_gps));
    builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which)
            {
                Intent i = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                startActivity(i);       
            }
        });
    builder.setNegativeButton("No", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which)
            {
                Toast.makeText(getBaseContext(), getString(R.string.gps_no), Toast.LENGTH_SHORT).show();
                finish();
            }
        });
    builder.create().show();

你还需要做的就是从你的javascript中调用这个函数...哦,这很有趣,但是你很快就会使用很多非常酷的java概念而且我会这样做。我只与Cordova合作,但这应该都是一样的=]请记住,如果你在我的代码中看到一些未定义的变量,你应该认为它是一个很好的。

所以,让我们说你确定这段代码出错了,让我们组成一个接口名称; &#39;的Android&#39;是一个非常合乎逻辑的

function onError(error) {
    alert('code: '    + error.code    + '\n' +
          'message: ' + error.message + '\n');
    Android.TurnOnTuneIn();
}

现在回到你的Java中,围绕你的phonegap应用程序找到它,无论它在哪里都可以找到WebView&#39 ;;如果它像我的cordova实现一样,它会在某个地方有webview.loadUrl()。打开定义此类的文件;这是编辑/放置我们正在处理的所有java的问题。在公共类PhoneGapActivity扩展Activity&#39;之后,插入&#39;实现CordovaInterface&#39; (我认为不是PhoneGapInterface);如果你的IDE在实现抽象方法的选项上给你一个错误,那就捣乱了。

确保WebView是类中的一个字段,而不是方法中的变量,然后

    //CordovaWebView should work, but maybe it needs to be PhoneGapWebView, you're smart, you'll figure it out =]
            webView = (CordovaWebView) findViewById(R.id.data_window);
    webView.getSettings().setJavaScriptEnabled(true);
    webView.getSettings().setBuiltInZoomControls(false);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED, WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED); //this always seemed like a good idea to me
    webView.addJavascriptInterface(new JSInterface(this), "Android"); //see the interface name? =]
//this line should already be in this class, just re-use it
webView.loadUrl("file:///"+getContext().getFilesDir().toString()+"/index.html");

现在制作该界面:

public class JSInterface {
    // these fcns are exposed to the WebView 
    private Context context;
    public JSInterface(Context context)
    {
        context = context;
    }
    @JavascriptInterface
    public void doEchoTest(String echo)
    {
//A useful test; I usually use it in a webViewClient that runs the function that calls this in my javascript with this:
//webView.loadUrl("javascript:echo('"echo!!!"');"); //this exact formatting
//but webViewClient is outside the scope of your question and would just confuse the 
//issue; however, you may need to implement 
//webViewClient with an delaying asynctask to seperatly run the js you loaded with the webpage,
//again, I used to do this ground-up, and phoneGap Might Just Work.

        Toast.makeText(context, echo, Toast.LENGTH_SHORT).show();   
    }
    @JavascriptInterface
    public void TurnOnTuneIn
    {
        aMethodThatHasThatFirstBitOfCodeIPublished();
    }
}

我喜欢接口=]

其余部分对于你的目的而言是相当的样板(尽管如此玩起来很有趣!)你可能不需要太多(如果有的话)。如果你注意到我提出的方法没有以你想要的方式返回,你可以使用startActivityForResult方法做同样的事情,我敢打赌它会很好地工作;注意超级。&#39;称之为Override;你只需要Intent(就像我向你展示的那样)和一些用于接收结果的参考号...再次超出了问题的范围。另外,我支持ResultCallback b / c我正在使用它的人,但是我自己也没有使用它。

@Override
public Activity getActivity(){
    return this;
}

@Override
public void setActivityResultCallback(CordovaPlugin plugin) {
    this.activityResultCallback = plugin;
}

public void startActivityForResult(CordovaPlugin command, Intent intent, int requestCode) {
    this.activityResultCallback = command;
    this.activityResultKeepRunning = this.keepRunning;

// If multitasking turned on, then disable it for activities that return results
    if (command != null) {
        this.keepRunning = false;
    }

// Start activity
    super.startActivityForResult(intent, requestCode);
}

@Override
public void cancelLoadUrl(){
//  no op
}

@Override
public Object onMessage(String id, Object data) {
        LOG.d("is", "onMessage(" + id + "," + data + ")");
        if ("exit".equals(id)) {
            super.finish();
        }
        return null;
}
@Override 
public void onPause() {
    Method pause = null; // Pauses the webview. 
    try { 
        pause = WebView.class.getMethod("onPause"); 
    } 
    catch (SecurityException e) { } 
    catch (NoSuchMethodException e) { } 
    if (pause != null) {
        try { pause.invoke(webView); 
        } 
        catch (InvocationTargetException e) { } 
        catch (IllegalAccessException e) { } 
    } 
    else { 
    // No such method. Stores the current URL. 
        suspendUrl = webView.getUrl(); // And loads a URL without any processing. 
        webView.loadUrl("file:///android_asset/nothing.html"); 
    } 
    super.onPause(); 
}

@Override 
public void onResume() { 
    super.onResume(); 
    Method resume = null; // Resumes the webview. 
    try { 
        resume = WebView.class.getMethod("onResume"); 
    } 
    catch (SecurityException e) { } 
    catch (NoSuchMethodException e) { } 
    if (resume != null) { 
        try { 
            resume.invoke(webView); 
        } 
        catch (InvocationTargetException e) { } 
        catch (IllegalAccessException e) { } 
    } 
    else if (webView != null) { // No such method. Restores the suspended URL. 
        if (suspendUrl == null) { 
            //this should be wherever you have your page; you can probably copy it from what is there now.
webView.loadUrl("file:///"+getContext().getFilesDir().toString()+"/index.html");
        } 
        else { 
            webView.loadUrl(suspendUrl); 
        } 
    }
}

希望能让你更进一步;如果您还没有使用它,请记住使用版本控制,这样您就可以对编辑不顾一切!

gl hf

答案 1 :(得分:0)

我与你分享这款phonegap插件,可以让你这样做。我将该功能添加到该插件作为贡献者。 https://github.com/BastienL/GPSDetector