如何将计算机中的MySql数据库连接到android应用程序？

Question

how can I connect the MySQL database in my local computer to android application.? is this possible .?

I developed an android application its working perfectly. Now I need access some data from MySQL database in my Local computer .I am searching a solution for this since 2 weeks. kindly help me to solve

---------------------------
| Order_id  |   Toatl Amt |
|-------------------------|
| 1025566   | 99.50       |
|-------------------------|
| 1125426   | 50.00       |
|-------------------------|
| 1025555   | 150.00      |
---------------------------

this is my data base table "Bill" in my local PC .i need access this database from android application installed in my mobile .when i enter the order id in my mobile app i need get total_amt of specific Oreder_id.but the problem is this table is in Local Computer . i can't access this database direclty from mobile app. is there is any solution for do this

Answer 1

You would need a webserver on your local machine, like Apache or NGINX , and an appropriate configuration such that your machine is recognized on your local network. You should then be able to program the host machine (ie, your local computer) into your Android application for testing, and then access it over your local network. Given MySQL and webserver configuration settings, you should be able to specify a port that provides access to your local mysql server.

Answer 2

You need a server. Apache servers are fine. The easiest way (and a little bit dirty) is to make a login in your server for whatever the App is about. Then in Android Studio you can use a Webview and load your server. You need to know that it usually takes time to load. If you are planning to do an app with an everyday connection, is better to look at Todd's answer , but if you only need some data, you will be OK working with Webviews.

Here is the code:

MainActivity.java

public class MainActivity extends AppCompatActivity {
    WebView mWebView; //your webview
    final String url ="http://www.yourwebpage.com"; // string with your webpage url
    ProgressDialog mProgress; //progress dialog that appears if your connection is not good (its an extra)

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main_activity);
        getSupportActionBar().hide();
        mWebView = (WebView) findViewById(R.id.webView); //your webview
        WebSettings ajustes = mWebView.getSettings(); //your websettings (i am spanish so i called it "ajustes")
        ajustes.setJavaScriptEnabled(true); //enable javascript in your webview
        ajustes.setBuiltInZoomControls(true);
        ajustes.setSupportZoom(true);
        mWebView.getSettings().setLoadWithOverviewMode(true);
        mWebView.getSettings().setUseWideViewPort(true);

        mWebView.setWebViewClient(new MyWebClient());
        mWebView.loadUrl(url); // here you call your url string that you made before
        mProgress = ProgressDialog.show(this, "Loading...", "Wait please...."); // progress dialog text

        mWebView.setWebViewClient(new WebViewClient() {
            public void onReceivedError(WebView view, int errorCode,
                                        String description, String failingUrl) { // in this fuction you deal with connection error so you show a toast that tells you that tere is not connection

                Toast.makeText(main_activity.this, "THERE IS NOT CONNECTION.TRY AGAIN LATER", Toast.LENGTH_LONG).show();
            }

            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                view.loadUrl(url);
                return true;
            }

            @Override
            public void onPageFinished(WebView view, String url) { //when your page finishes loading, your progressdialog will disappear
                if (mProgress.isShowing()) {
                    mProgress.dismiss();
                }
            }
        });
        // set url for webview to load
        mWebView.loadUrl(url);
    }

    private class MyWebClient extends WebViewClient {
        //AlertDialog.Builder alert = new AlertDialog.Builder(web.this);
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);
            return true;
        }
    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:ads="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:weightSum="1">

    <WebView
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:id="@+id/webView"
        android:layout_gravity="center_horizontal" />

</LinearLayout>

So that was all the code. If you need more aske me. Adiós!!!

Answer 3

您需要在计算机上设置本地服务器，我目前正在使用Xampp来访问通过Sql数据库与我联系的Web服务。