Android应用程序:为电子邮件功能在Web视图中添加Mailto

Question

package com.helloworld;
import android.app.Activity;
import android.os.Bundle; 
import android.view.Window;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.view.KeyEvent;
import android.content.Intent;
import android.net.MailTo;
import android.content.Context;

public class HelloWorld extends Activity
{
    final Activity activity = this;

    WebView webview;
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (webview != null && (keyCode == KeyEvent.KEYCODE_BACK) && webview.canGoBack()) {
        webview.goBack();
        return true;
    }
    return super.onKeyDown(keyCode, event);
    }
    @Override
   public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.getWindow().requestFeature(Window.FEATURE_PROGRESS);
        setContentView(R.layout.main);

        webview = (WebView) findViewById(R.id.webview);
        webview.getSettings().setJavaScriptEnabled(true);
        webview.getSettings().setBuiltInZoomControls(true);
        webview.getSettings().setUseWideViewPort(true);
        webview.loadUrl("http://www.blahblah.org");
        webview.setWebChromeClient(new WebChromeClient() {
            public void onProgressChanged(WebView view, int progress)
            {
                activity.setTitle("Loading...");
                activity.setProgress(progress * 100);
                if(progress == 100)
                    activity.setTitle(R.string.app_name);
            }
        });
        webview.setWebViewClient(new WebViewClient() {
            @Override
            public void onReceivedError(WebView view, int errorCode, String       description, String failingUrl)
            {
            // Handle the error
            }
     @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url)
        {
            if(url.startsWith("mailto:")){
                MailTo mt = MailTo.parse(url);
                Intent i = newEmailIntent(activity.this, mt.getTo(), mt.getSubject(), mt.getBody(), mt.getCc());
                startActivity(i);
                view.reload();
                return true;
            }
            view.loadUrl(url);
            return true;
        }
    });
}
    public static Intent newEmailIntent(Context context, String address, String subject, String body, String cc) {
        Intent intent = new Intent(Intent.ACTION_SEND);
        intent.putExtra(Intent.EXTRA_EMAIL, new String[] { address });
        intent.putExtra(Intent.EXTRA_TEXT, body);
        intent.putExtra(Intent.EXTRA_SUBJECT, subject);
        intent.putExtra(Intent.EXTRA_CC, cc);
        intent.setType("message/rfc822");
        return intent;
}

}

在这个网站上的人们和帖子的帮助下，我能够得到一个有效的web应用程序。我只需要让"mailto"正常工作就行了。我已经尝试了不同的代码从帖子我发现。上面的代码是得到"IntentSupport无法解决"one_answers"MIME类型无法解决"刚刚开始尝试学习这个东西。任何反馈都会很好。谢谢!

Answer 1

什么是IntentSupport类?我没看到你把它带到任何地方。我感觉这是你没有安装的第三方库