我会照你说的做，创建对话框，然后将它们发送到设置；我假设您已经设法在适当的时候调用了 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();
您还需要做的是从您的 javascript 中调用此函数...哦，这很有趣，b/c 您将同时使用许多非常酷的 java 概念，而我只使用过Cordova，但这应该都是一样的 =] 请记住，如果您在我的代码中看到一些未定义的变量，您可能应该认为它是一个字段。
假设你确定这段代码会出错，让我们组成一个接口名称； “Android”是一个非常合乎逻辑的产品
function onError(error) {
alert('code: ' + error.code + '\n' +
'message: ' + error.message + '\n');
Android.TurnOnTuneIn();
}
现在回到您的 Java 中，在您的 phonegap 应用程序周围用 grep 查找它有“WebView”的位置；如果它像我的科尔多瓦实现一样，它会在某个地方有 webview.loadUrl() 。打开定义这个类的文件；这是在这个问题中编辑/放置我们正在处理的所有 java 的那个。在'public class PhoneGapActivity extends Activity'之类的东西之后，插入'implements CordovaInterface'（我认为不是PhoneGapInterface）；如果您的 IDE 在实现抽象方法的选项中出现错误，请敲击它。
确保 WebView 是类中的字段，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");
现在制作那个界面：
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();
}
}
我喜欢界面 =]
其余的对于您的目的来说是相当样板的（但玩起来很有趣！），如果有的话，您可能不需要太多。如果你注意到我提出的方法没有返回你想要的方式，你可以使用 startActivityForResult 方法来做同样的事情，我敢打赌它会很好地工作；注意“超级”。调用 Override 进行；您只需要 Intent （就像我在顶部显示的那样）和一些参考号来接收结果......再次，超出了问题的范围。此外，我还加入了对 ResultCallback b/c 的支持，一个与我一起工作的人使用它，但我自己不使用它。
@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);
}
}
}
希望这能让你走得更远；如果您还没有使用它，请记住使用版本控制，这样您就可以肆无忌惮地进行编辑！
gl 高频