android+json+php+mysql实现用户反馈功能

相信每个项目都会有用户反馈建议等功能，这个实现的方法很多，下面是我实现的方法，供大家交流。首先看具体界面，三个字段。名字，邮箱为选填，可以为空，建议不能为空。如有需要可以给我留言。

下面贴出布局代码，这里用到一个就是把另外一个布局文件引入到这个布局中。

<span style="color: #0000ff;"></span><span style="color: #ff00ff;">xml version="1.0" encoding="utf-8"</span><span style="color: #0000ff;">?></span>
<span style="color: #0000ff;"><span style="color: #800000;">LinearLayout </span><span style="color: #ff0000;">xmlns:android</span><span style="color: #0000ff;">="http://schemas.android.com/apk/res/android"</span><span style="color: #ff0000;">
    android:layout_width</span><span style="color: #0000ff;">="match_parent"</span><span style="color: #ff0000;">
    android:layout_height</span><span style="color: #0000ff;">="match_parent"</span><span style="color: #ff0000;">
    android:orientation</span><span style="color: #0000ff;">="vertical"</span><span style="color: #ff0000;">
    android:background</span><span style="color: #0000ff;">="@color/bg_gray"</span> <span style="color: #0000ff;">></span>
    <span style="color: #0000ff;"><span style="color: #800000;">include </span><span style="color: #ff0000;">layout</span><span style="color: #0000ff;">="@layout/uphead"</span><span style="color: #0000ff;">/></span>

    <span style="color: #008000;"><!--</span><span style="color: #008000;"> Name Label </span><span style="color: #008000;">--></span>
    <span style="color: #0000ff;"><span style="color: #800000;">TextView </span><span style="color: #ff0000;">android:layout_width</span><span style="color: #0000ff;">="fill_parent"</span><span style="color: #ff0000;">
        android:layout_height</span><span style="color: #0000ff;">="wrap_content"</span><span style="color: #ff0000;">
        android:text</span><span style="color: #0000ff;">="名字(选填)"</span><span style="color: #ff0000;">
        android:paddingLeft</span><span style="color: #0000ff;">="10dip"</span><span style="color: #ff0000;">
        android:paddingRight</span><span style="color: #0000ff;">="10dip"</span><span style="color: #ff0000;">
        android:textColor</span><span style="color: #0000ff;">="@color/coffee"</span><span style="color: #ff0000;">
        android:paddingTop</span><span style="color: #0000ff;">="10dip"</span><span style="color: #ff0000;">
        android:textSize</span><span style="color: #0000ff;">="12sp"</span><span style="color: #0000ff;">/></span>

    <span style="color: #008000;"><!--</span><span style="color: #008000;"> Input Name </span><span style="color: #008000;">--></span>
    <span style="color: #0000ff;"><span style="color: #800000;">EditText </span><span style="color: #ff0000;">android:id</span><span style="color: #0000ff;">="@+id/inputName"</span><span style="color: #ff0000;">
        android:layout_width</span><span style="color: #0000ff;">="fill_parent"</span><span style="color: #ff0000;">
        android:layout_height</span><span style="color: #0000ff;">="wrap_content"</span><span style="color: #ff0000;">
        android:layout_margin</span><span style="color: #0000ff;">="5dip"</span><span style="color: #ff0000;">
        android:layout_marginBottom</span><span style="color: #0000ff;">="15dip"</span><span style="color: #ff0000;">
        android:singleLine</span><span style="color: #0000ff;">="true"</span><span style="color: #0000ff;">/></span>

    <span style="color: #008000;"><!--</span><span style="color: #008000;"> Price Label </span><span style="color: #008000;">--></span>
    <span style="color: #0000ff;"><span style="color: #800000;">TextView </span><span style="color: #ff0000;">android:layout_width</span><span style="color: #0000ff;">="fill_parent"</span><span style="color: #ff0000;">
        android:layout_height</span><span style="color: #0000ff;">="wrap_content"</span><span style="color: #ff0000;">
        android:text</span><span style="color: #0000ff;">="邮箱(选填)"</span><span style="color: #ff0000;">
        android:paddingLeft</span><span style="color: #0000ff;">="10dip"</span><span style="color: #ff0000;">
        android:paddingRight</span><span style="color: #0000ff;">="10dip"</span><span style="color: #ff0000;">
        android:textColor</span><span style="color: #0000ff;">="@color/coffee"</span><span style="color: #ff0000;">
        android:paddingTop</span><span style="color: #0000ff;">="10dip"</span><span style="color: #ff0000;">
        android:textSize</span><span style="color: #0000ff;">="12sp"</span><span style="color: #0000ff;">/></span>

    <span style="color: #008000;"><!--</span><span style="color: #008000;"> Input Price </span><span style="color: #008000;">--></span>
    <span style="color: #0000ff;"><span style="color: #800000;">EditText </span><span style="color: #ff0000;">android:id</span><span style="color: #0000ff;">="@+id/inputEmail"</span><span style="color: #ff0000;">
        android:layout_width</span><span style="color: #0000ff;">="fill_parent"</span><span style="color: #ff0000;">
        android:layout_height</span><span style="color: #0000ff;">="wrap_content"</span><span style="color: #ff0000;">
        android:layout_margin</span><span style="color: #0000ff;">="5dip"</span><span style="color: #ff0000;">
        android:layout_marginBottom</span><span style="color: #0000ff;">="15dip"</span><span style="color: #ff0000;">
        android:singleLine</span><span style="color: #0000ff;">="true"</span><span style="color: #0000ff;">/></span>

    <span style="color: #008000;"><!--</span><span style="color: #008000;"> Description Label </span><span style="color: #008000;">--></span>
    <span style="color: #0000ff;"><span style="color: #800000;">TextView </span><span style="color: #ff0000;">android:layout_width</span><span style="color: #0000ff;">="fill_parent"</span><span style="color: #ff0000;">
        android:layout_height</span><span style="color: #0000ff;">="wrap_content"</span><span style="color: #ff0000;">
        android:text</span><span style="color: #0000ff;">="建议(必填)"</span><span style="color: #ff0000;">
        android:paddingLeft</span><span style="color: #0000ff;">="10dip"</span><span style="color: #ff0000;">
        android:paddingRight</span><span style="color: #0000ff;">="10dip"</span><span style="color: #ff0000;">
        android:paddingTop</span><span style="color: #0000ff;">="10dip"</span><span style="color: #ff0000;">
        android:textColor</span><span style="color: #0000ff;">="@color/coffee"</span><span style="color: #ff0000;">
        android:textSize</span><span style="color: #0000ff;">="12sp"</span><span style="color: #0000ff;">/></span>

    <span style="color: #008000;"><!--</span><span style="color: #008000;"> Input description </span><span style="color: #008000;">--></span>
    <span style="color: #0000ff;"><span style="color: #800000;">EditText </span><span style="color: #ff0000;">android:id</span><span style="color: #0000ff;">="@+id/inputDesc"</span><span style="color: #ff0000;">
        android:layout_width</span><span style="color: #0000ff;">="fill_parent"</span><span style="color: #ff0000;">
        android:layout_height</span><span style="color: #0000ff;">="wrap_content"</span><span style="color: #ff0000;">
        android:layout_margin</span><span style="color: #0000ff;">="5dip"</span><span style="color: #ff0000;">
        android:layout_marginBottom</span><span style="color: #0000ff;">="15dip"</span><span style="color: #ff0000;">
        android:lines</span><span style="color: #0000ff;">="4"</span><span style="color: #ff0000;">
        android:gravity</span><span style="color: #0000ff;">="top"</span><span style="color: #0000ff;">/></span>

    <span style="color: #008000;"><!--</span><span style="color: #008000;"> Button Create Product </span><span style="color: #008000;">--></span>
    <span style="color: #0000ff;"><span style="color: #800000;">Button </span><span style="color: #ff0000;">android:id</span><span style="color: #0000ff;">="@+id/btnCreateProduct"</span><span style="color: #ff0000;">
        android:layout_width</span><span style="color: #0000ff;">="fill_parent"</span><span style="color: #ff0000;">
        android:layout_height</span><span style="color: #0000ff;">="wrap_content"</span><span style="color: #ff0000;">
        android:text</span><span style="color: #0000ff;">="提交"</span><span style="color: #ff0000;">
        android:textSize</span><span style="color: #0000ff;">="20sp"</span><span style="color: #ff0000;">
        android:textColor</span><span style="color: #0000ff;">="@color/coffee"</span>
        <span style="color: #0000ff;">/></span>

<span style="color: #0000ff;"></span><span style="color: #800000;">LinearLayout</span><span style="color: #0000ff;">></span></span></span></span></span></span></span></span></span></span>

下面贴出uphead的布局代码，里面用到一个TextView,一个Button为返回按钮。

<span style="color: #0000ff;"></span><span style="color: #ff00ff;">xml version="1.0" encoding="utf-8"</span><span style="color: #0000ff;">?></span>
<span style="color: #0000ff;"><span style="color: #800000;">RelativeLayout </span><span style="color: #ff0000;">xmlns:android</span><span style="color: #0000ff;">="http://schemas.android.com/apk/res/android"</span><span style="color: #ff0000;">
        android:layout_width</span><span style="color: #0000ff;">="fill_parent"</span><span style="color: #ff0000;">
        android:layout_height</span><span style="color: #0000ff;">="50dp"</span><span style="color: #ff0000;">
        android:background</span><span style="color: #0000ff;">="@drawable/top"</span> <span style="color: #0000ff;">></span>
        <span style="color: #0000ff;"><span style="color: #800000;">TextView
            </span><span style="color: #ff0000;">android:id</span><span style="color: #0000ff;">="@+id/tv_head"</span><span style="color: #ff0000;">
            android:layout_width</span><span style="color: #0000ff;">="wrap_content"</span><span style="color: #ff0000;">
            android:layout_height</span><span style="color: #0000ff;">="wrap_content"</span><span style="color: #ff0000;">
            android:layout_centerInParent</span><span style="color: #0000ff;">="true"</span><span style="color: #ff0000;">
            android:shadowColor</span><span style="color: #0000ff;">="#ff000000"</span><span style="color: #ff0000;">
            android:shadowDx</span><span style="color: #0000ff;">="2"</span><span style="color: #ff0000;">
            android:shadowDy</span><span style="color: #0000ff;">="0"</span><span style="color: #ff0000;">
            android:shadowRadius</span><span style="color: #0000ff;">="1"</span><span style="color: #ff0000;">
            android:text</span><span style="color: #0000ff;">=""</span><span style="color: #ff0000;">
            android:textColor</span><span style="color: #0000ff;">="@color/white"</span><span style="color: #ff0000;">
            android:textSize</span><span style="color: #0000ff;">="18sp"</span><span style="color: #ff0000;">
            android:textStyle</span><span style="color: #0000ff;">="bold"</span> <span style="color: #0000ff;">/></span>
        <span style="color: #0000ff;"><span style="color: #800000;">Button
            </span><span style="color: #ff0000;">android:id</span><span style="color: #0000ff;">="@+id/upback"</span><span style="color: #ff0000;">
            android:layout_width</span><span style="color: #0000ff;">="wrap_content"</span><span style="color: #ff0000;">
            android:layout_height</span><span style="color: #0000ff;">="wrap_content"</span><span style="color: #ff0000;">
            android:layout_alignParentLeft</span><span style="color: #0000ff;">="true"</span><span style="color: #ff0000;">
            android:layout_centerVertical</span><span style="color: #0000ff;">="true"</span><span style="color: #ff0000;">
            android:layout_marginLeft</span><span style="color: #0000ff;">="17dp"</span><span style="color: #ff0000;">
            android:drawableLeft</span><span style="color: #0000ff;">="@id/tv_head"</span><span style="color: #ff0000;">
            android:background</span><span style="color: #0000ff;">="@drawable/back"</span> <span style="color: #0000ff;">/></span>

    <span style="color: #0000ff;"></span><span style="color: #800000;">RelativeLayout</span><span style="color: #0000ff;">></span></span></span></span>

下面贴出android客户端代码，三个类，一个用于与服务器交互发送post请求，以及json的传递。还有一个Dailog实例。

<span style="color: #0000ff;">package</span><span style="color: #000000;"> com.android.up;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> java.util.ArrayList;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> java.util.List;

</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> org.apache.http.HttpResponse;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> org.apache.http.NameValuePair;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> org.apache.http.client.ClientProtocolException;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> org.apache.http.message.BasicNameValuePair;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> org.json.JSONObject;

</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> com.android.MainActivity;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> com.android.R;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> com.anroid.net.DialogUtil;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> android.app.Activity;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> android.app.ProgressDialog;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> android.content.Intent;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> android.os.AsyncTask;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> android.os.Bundle;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> android.view.View;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> android.view.View.OnClickListener;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> android.widget.Button;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> android.widget.EditText;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> android.widget.TextView;

</span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">class</span> up <span style="color: #0000ff;">extends</span><span style="color: #000000;"> Activity {

    </span><span style="color: #008000;">//</span><span style="color: #008000;"> Progress Dialog</span>
    <span style="color: #0000ff;">private</span><span style="color: #000000;"> ProgressDialog pDialog;
    </span><span style="color: #0000ff;">private</span><span style="color: #000000;"> TextView tv_head;
    JSONParser jsonParser </span>= <span style="color: #0000ff;">new</span><span style="color: #000000;"> JSONParser();
    EditText inputName;
    EditText inputEmail;
    EditText inputDesc;
    Button upback;

    </span><span style="color: #008000;">//</span><span style="color: #008000;"> url to create new product</span>
    <span style="color: #0000ff;">private</span> <span style="color: #0000ff;">static</span> String url_up = "http://10.0.2.2/up/up.php";<span style="color: #008000;"><br>    private static final String TAG_MESSAGE = "message";<br></span>
<span style="color: #000000;">    @Override
    </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> onCreate(Bundle savedInstanceState) {
        </span><span style="color: #0000ff;">super</span><span style="color: #000000;">.onCreate(savedInstanceState);
        setContentView(R.layout.up);
        tv_head </span>=<span style="color: #000000;"> (TextView)findViewById(R.id.tv_head);
        tv_head.setText(</span>"建议"<span style="color: #000000;">);
        </span><span style="color: #008000;">//</span><span style="color: #008000;"> Edit Text</span>
        inputName =<span style="color: #000000;"> (EditText) findViewById(R.id.inputName);
        inputEmail </span>=<span style="color: #000000;"> (EditText) findViewById(R.id.inputEmail);
        inputDesc </span>=<span style="color: #000000;"> (EditText) findViewById(R.id.inputDesc);
        upback </span>=<span style="color: #000000;"> (Button)findViewById(R.id.upback);
        upback.setOnClickListener(</span><span style="color: #0000ff;">new</span><span style="color: #000000;"> OnClickListener() {

            @Override
            </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> onClick(View arg0) {
                </span><span style="color: #008000;">//</span><span style="color: #008000;"> TODO Auto-generated method stub</span>
                Intent back = <span style="color: #0000ff;">new</span> Intent(up.<span style="color: #0000ff;">this</span>,MainActivity.<span style="color: #0000ff;">class</span><span style="color: #000000;">);
                back.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                startActivity(back);
                up.</span><span style="color: #0000ff;">this</span><span style="color: #000000;">.finish();
            }
        });

        </span><span style="color: #008000;">//</span><span style="color: #008000;"> Create button</span>
        Button btnCreateProduct =<span style="color: #000000;"> (Button) findViewById(R.id.btnCreateProduct);
        </span><span style="color: #008000;">//</span><span style="color: #008000;"> button click event</span>
        btnCreateProduct.setOnClickListener(<span style="color: #0000ff;">new</span><span style="color: #000000;"> View.OnClickListener() {

            </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> onClick(View view) {
                </span><span style="color: #008000;">//</span><span style="color: #008000;"> creating new product in background thread</span>
                <span style="color: #0000ff;">if</span><span style="color: #000000;">(validate()){
                </span><span style="color: #0000ff;">new</span><span style="color: #000000;"> Up().execute();
            }
                }
        });
    }
    </span><span style="color: #0000ff;">private</span> <span style="color: #0000ff;">boolean</span><span style="color: #000000;"> validate()
    {
        String description </span>=<span style="color: #000000;"> inputDesc.getText().toString().trim();
        </span><span style="color: #0000ff;">if</span> (description.equals(""<span style="color: #000000;">))
        {
            DialogUtil.showDialog(</span><span style="color: #0000ff;">this</span>, "您还没有填写建议", <span style="color: #0000ff;">false</span><span style="color: #000000;">);
            </span><span style="color: #0000ff;">return</span> <span style="color: #0000ff;">false</span><span style="color: #000000;">;
        }

        </span><span style="color: #0000ff;">return</span> <span style="color: #0000ff;">true</span><span style="color: #000000;">;
    }
    </span><span style="color: #008000;">/**</span><span style="color: #008000;">
     * Background Async Task to Create new product
     * </span><span style="color: #008000;">*/</span>
    <span style="color: #0000ff;">class</span> Up <span style="color: #0000ff;">extends</span> AsyncTask<string string><span style="color: #000000;"> {

        </span><span style="color: #008000;">/**</span><span style="color: #008000;">
         * Before starting background thread Show Progress Dialog
         * </span><span style="color: #008000;">*/</span><span style="color: #000000;">
        @Override
        </span><span style="color: #0000ff;">protected</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> onPreExecute() {
            </span><span style="color: #0000ff;">super</span><span style="color: #000000;">.onPreExecute();
            pDialog </span>= <span style="color: #0000ff;">new</span> ProgressDialog(up.<span style="color: #0000ff;">this</span><span style="color: #000000;">);
            pDialog.setMessage(</span>"正在上传.."<span style="color: #000000;">);
            pDialog.setIndeterminate(</span><span style="color: #0000ff;">false</span><span style="color: #000000;">);
            pDialog.setCancelable(</span><span style="color: #0000ff;">true</span><span style="color: #000000;">);
            pDialog.show();
        }
        </span><span style="color: #008000;">/**</span><span style="color: #008000;">
         * Creating product
         * </span><span style="color: #008000;">*/</span>
        <span style="color: #0000ff;">protected</span><span style="color: #000000;"> String doInBackground(String... args) {
            String name </span>=<span style="color: #000000;"> inputName.getText().toString();
            String email </span>=<span style="color: #000000;"> inputEmail.getText().toString();
            String description </span>=<span style="color: #000000;"> inputDesc.getText().toString();

            </span><span style="color: #008000;">//</span><span style="color: #008000;"> Building Parameters</span>
            List<namevaluepair> params = <span style="color: #0000ff;">new</span> ArrayList<namevaluepair><span style="color: #000000;">();
            params.add(</span><span style="color: #0000ff;">new</span> BasicNameValuePair("name"<span style="color: #000000;">, name));
            params.add(</span><span style="color: #0000ff;">new</span> BasicNameValuePair("email"<span style="color: #000000;">, email));
            params.add(</span><span style="color: #0000ff;">new</span> BasicNameValuePair("description"<span style="color: #000000;">, description));

            </span><span style="color: #008000;">//</span><span style="color: #008000;"> getting JSON Object
            </span><span style="color: #008000;">//</span><span style="color: #008000;"> Note that create product url accepts POST method</span>
           <span style="color: #0000ff;">try</span><span style="color: #000000;">{
            JSONObject json </span>=<span style="color: #000000;"> jsonParser.makeHttpRequest(url_up,
                    </span>"POST"<span style="color: #000000;">, params);<br>            String message = json.getString(TAG_MESSAGE);<br>            return message;
           }</span><span style="color: #0000ff;">catch</span><span style="color: #000000;">(Exception e){</span><span style="color: #000000;">
               e.printStackTrace(); <br>               return "";
           }
            </span><span style="color: #008000;">//</span><span style="color: #008000;"> check for success tag</span>

     <span style="color: #000000;">
        }
        </span><span style="color: #008000;">/**</span><span style="color: #008000;">
         * After completing background task Dismiss the progress dialog
         * *</span><span style="color: #008000;">*/</span>
        <span style="color: #0000ff;">protected</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> onPostExecute(String message) {               </span><span style="color: #000000;">
            pDialog.dismiss();<br>           //message 为接收doInbackground的返回值<br>            Toast.makeText(getApplicationContext(), message, 8000).show();


        }
        }

    }</span></namevaluepair></namevaluepair></string>

下面贴出Dailog实例类

<span style="color: #008000;">/**</span><span style="color: #008000;">
 *
 </span><span style="color: #008000;">*/</span>
<span style="color: #0000ff;">package</span><span style="color: #000000;"> com.anroid.net;

</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> android.app.AlertDialog;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> android.content.Context;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> android.content.DialogInterface;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> android.content.DialogInterface.OnClickListener;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> android.view.View;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> android.app.Activity;</span>
<span style="color: #0000ff;">public</span> <span style="color: #0000ff;">class</span><span style="color: #000000;"> DialogUtil
{
    </span><span style="color: #008000;">//</span><span style="color: #008000;"> 定义一个显示消息的对话框</span>
    <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">void</span> showDialog(<span style="color: #0000ff;">final</span><span style="color: #000000;"> Context ctx
        , String msg , </span><span style="color: #0000ff;">boolean</span><span style="color: #000000;"> closeSelf)
    {
        </span><span style="color: #008000;">//</span><span style="color: #008000;"> 创建一个AlertDialog.Builder对象</span>
        AlertDialog.Builder builder = <span style="color: #0000ff;">new</span><span style="color: #000000;"> AlertDialog.Builder(ctx)
            .setMessage(msg).setCancelable(</span><span style="color: #0000ff;">false</span><span style="color: #000000;">);
        </span><span style="color: #0000ff;">if</span><span style="color: #000000;">(closeSelf)
        {
            builder.setPositiveButton(</span>"确定", <span style="color: #0000ff;">new</span><span style="color: #000000;"> OnClickListener()
            {
                </span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">void</span> onClick(DialogInterface dialog, <span style="color: #0000ff;">int</span><span style="color: #000000;"> which)
                {
                    </span><span style="color: #008000;">//</span><span style="color: #008000;"> 结束当前Activity</span>
<span style="color: #000000;">                    ((Activity)ctx).finish();
                }
            });
        }
        </span><span style="color: #0000ff;">else</span><span style="color: #000000;">
        {
            builder.setPositiveButton(</span>"确定", <span style="color: #0000ff;">null</span><span style="color: #000000;">);
        }
        builder.create().show();
    }
    </span><span style="color: #008000;">//</span><span style="color: #008000;"> 定义一个显示指定组件的对话框</span>
    <span style="color: #0000ff;">public</span> <span style="color: #0000ff;">static</span> <span style="color: #0000ff;">void</span><span style="color: #000000;"> showDialog(Context ctx , View view)
    {
        AlertDialog.Builder builder </span>= <span style="color: #0000ff;">new</span><span style="color: #000000;"> AlertDialog.Builder(ctx)
            .setView(view).setCancelable(</span><span style="color: #0000ff;">false</span><span style="color: #000000;">)
            .setPositiveButton(</span>"确定", <span style="color: #0000ff;">null</span><span style="color: #000000;">);
        builder.create()
            .show();
    }
}</span>

剩下就是如何与服务器端交互了不多说，代码如下

<span style="color: #0000ff;">package</span><span style="color: #000000;"> com.android.up;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> java.io.BufferedReader;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> java.io.IOException;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> java.io.InputStream;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> java.io.InputStreamReader;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> java.io.UnsupportedEncodingException;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> java.util.List;

</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> org.apache.http.HttpEntity;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> org.apache.http.HttpResponse;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> org.apache.http.NameValuePair;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> org.apache.http.client.ClientProtocolException;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> org.apache.http.client.entity.UrlEncodedFormEntity;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> org.apache.http.client.methods.HttpPost;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> org.apache.http.impl.client.DefaultHttpClient;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> org.apache.http.protocol.HTTP;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> org.json.JSONException;
</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> org.json.JSONObject;

</span><span style="color: #0000ff;">import</span><span style="color: #000000;"> android.util.Log;

</span><span style="color: #0000ff;">public</span> <span style="color: #0000ff;">class</span><span style="color: #000000;"> JSONParser {

    </span><span style="color: #0000ff;">static</span> InputStream is = <span style="color: #0000ff;">null</span><span style="color: #000000;">;
    </span><span style="color: #0000ff;">static</span> JSONObject jObj = <span style="color: #0000ff;">null</span><span style="color: #000000;">;
    </span><span style="color: #0000ff;">static</span> String json = ""<span style="color: #000000;">;
    </span><span style="color: #008000;">//</span><span style="color: #008000;"> constructor</span>
    <span style="color: #0000ff;">public</span><span style="color: #000000;"> JSONParser() {
    }
    </span><span style="color: #008000;">//</span><span style="color: #008000;"> function get json from url
    </span><span style="color: #008000;">//</span><span style="color: #008000;"> by making HTTP POST </span>
    <span style="color: #0000ff;">public</span><span style="color: #000000;"> JSONObject makeHttpRequest(String url, String method,
            List</span><namevaluepair><span style="color: #000000;"> params) {

        </span><span style="color: #008000;">//</span><span style="color: #008000;"> Making HTTP request</span>
        <span style="color: #0000ff;">try</span><span style="color: #000000;"> {
                </span><span style="color: #008000;">//</span><span style="color: #008000;"> request method is POST
                </span><span style="color: #008000;">//</span><span style="color: #008000;"> defaultHttpClient</span>
                DefaultHttpClient httpClient = <span style="color: #0000ff;">new</span><span style="color: #000000;"> DefaultHttpClient();
                HttpPost httpPost </span>= <span style="color: #0000ff;">new</span><span style="color: #000000;"> HttpPost(url);
                httpPost.setEntity(</span><span style="color: #0000ff;">new</span><span style="color: #000000;"> UrlEncodedFormEntity(params,HTTP.UTF_8));
                HttpResponse httpResponse </span>=<span style="color: #000000;"> httpClient.execute(httpPost);
                HttpEntity httpEntity </span>=<span style="color: #000000;"> httpResponse.getEntity();
                is </span>=<span style="color: #000000;"> httpEntity.getContent();

        } </span><span style="color: #0000ff;">catch</span><span style="color: #000000;"> (UnsupportedEncodingException e) {
            e.printStackTrace();
        } </span><span style="color: #0000ff;">catch</span><span style="color: #000000;"> (ClientProtocolException e) {
            e.printStackTrace();
        } </span><span style="color: #0000ff;">catch</span><span style="color: #000000;"> (IOException e) {
            e.printStackTrace();
        }
        </span><span style="color: #0000ff;">try</span><span style="color: #000000;"> {
            BufferedReader reader </span>= <span style="color: #0000ff;">new</span> BufferedReader(<span style="color: #0000ff;">new</span><span style="color: #000000;"> InputStreamReader(
                    is, </span>"UTF-8"<span style="color: #000000;">));
            StringBuilder sb </span>= <span style="color: #0000ff;">new</span><span style="color: #000000;"> StringBuilder();
            String line </span>= <span style="color: #0000ff;">null</span><span style="color: #000000;">;
            </span><span style="color: #0000ff;">while</span> ((line = reader.readLine()) != <span style="color: #0000ff;">null</span><span style="color: #000000;">) {
                sb.append(line </span>+ "\n"<span style="color: #000000;">);
            }
            is.close();
            json </span>=<span style="color: #000000;"> sb.toString();
        } </span><span style="color: #0000ff;">catch</span><span style="color: #000000;"> (Exception e) {
            Log.e(</span>"Buffer Error", "Error converting result " +<span style="color: #000000;"> e.toString());
            Log.d(</span>"json"<span style="color: #000000;">, json.toString());
        }

        </span><span style="color: #008000;">//</span><span style="color: #008000;"> try parse the string to a JSON object</span>
        <span style="color: #0000ff;">try</span><span style="color: #000000;"> {
            jObj </span>= <span style="color: #0000ff;">new</span><span style="color: #000000;"> JSONObject(json);
        } </span><span style="color: #0000ff;">catch</span><span style="color: #000000;"> (JSONException e) {
            Log.e(</span>"JSON Parser", "Error parsing data " +<span style="color: #000000;"> e.toString());
        }

        </span><span style="color: #008000;">//</span><span style="color: #008000;"> return JSON String</span>
        <span style="color: #0000ff;">return</span><span style="color: #000000;"> jObj;

    }
}</span></namevaluepair>

到此android客户端已经完成，后天服务器端用php+mysql实现，当然这里只是个实例，存取到数据库里面，没有进行展示，代码如下

<span style="color: #000000;">php
</span><span style="color: #008000;">//</span><span style="color: #008000;"> array for JSON response</span>
<span style="color: #800080;">$response</span> = <span style="color: #0000ff;">array</span><span style="color: #000000;">();
</span><span style="color: #0000ff;">include</span>("conn.php"<span style="color: #000000;">);
</span><span style="color: #008000;">//</span><span style="color: #008000;"> check for required fields</span>
<span style="color: #0000ff;">if</span> (<span style="color: #0000ff;">isset</span>(<span style="color: #800080;">$_POST</span>['name']) && <span style="color: #0000ff;">isset</span>(<span style="color: #800080;">$_POST</span>['email']) && <span style="color: #0000ff;">isset</span>(<span style="color: #800080;">$_POST</span>['description'<span style="color: #000000;">])) {

    </span><span style="color: #800080;">$name</span> = <span style="color: #800080;">$_POST</span>['name'<span style="color: #000000;">];
    </span><span style="color: #800080;">$email</span> = <span style="color: #800080;">$_POST</span>['email'<span style="color: #000000;">];
    </span><span style="color: #800080;">$description</span> = <span style="color: #800080;">$_POST</span>['description'<span style="color: #000000;">];
    </span><span style="color: #800080;">$result</span> = <span style="color: #008080;">mysql_query</span>("INSERT INTO up(name, email, description) VALUES('<span style="color: #800080;">$name</span>', '<span style="color: #800080;">$email</span>', '<span style="color: #800080;">$description</span>')"<span style="color: #000000;">);</span><span style="color: #008000;">//</span><span style="color: #008000;"> check if row inserted or not</span>
    <span style="color: #0000ff;">if</span> (<span style="color: #800080;">$result</span><span style="color: #000000;">) {
        </span><span style="color: #008000;">//</span><span style="color: #008000;"> successfully inserted into database</span>
        <span style="color: #800080;">$response</span>["success"] = 1<span style="color: #000000;">;
        </span><span style="color: #800080;">$response</span>["message"] = "Product successfully created."<span style="color: #000000;">;

        </span><span style="color: #008000;">//</span><span style="color: #008000;"> echoing JSON response</span>
        <span style="color: #0000ff;">echo</span> json_encode(<span style="color: #800080;">$response</span><span style="color: #000000;">);
    } </span><span style="color: #0000ff;">else</span><span style="color: #000000;"> {
        </span><span style="color: #008000;">//</span><span style="color: #008000;"> failed to insert row</span>
        <span style="color: #800080;">$response</span>["success"] = 0<span style="color: #000000;">;
        </span><span style="color: #800080;">$response</span>["message"] = "Oops! An error occurred."<span style="color: #000000;">;

        </span><span style="color: #008000;">//</span><span style="color: #008000;"> echoing JSON response</span>
        <span style="color: #0000ff;">echo</span> json_encode(<span style="color: #800080;">$response</span><span style="color: #000000;">);
    }
} </span><span style="color: #0000ff;">else</span><span style="color: #000000;"> {
    </span><span style="color: #008000;">//</span><span style="color: #008000;"> required field is missing</span>
    <span style="color: #800080;">$response</span>["success"] = 0<span style="color: #000000;">;
    </span><span style="color: #800080;">$response</span>["message"] = "Required field(s) is missing"<span style="color: #000000;">;

    </span><span style="color: #008000;">//</span><span style="color: #008000;"> echoing JSON response</span>
    <span style="color: #0000ff;">echo</span> json_encode(<span style="color: #800080;">$response</span><span style="color: #000000;">);
}
</span>?>

数据库表结构如下，连接数据库代码就不贴出了，记得把编码设置为UTF-8就行了。

到此就完成了一个用户反馈的基本功能，后台数据里展示。如有问题欢迎给我留言。