使用（提交和请求）具有 Android 可穿戴设备的数据库

Question

我想在按下 可穿戴应用 上的按钮时将值写入服务器上的数据库。我在 ("normal") Android 应用程序（下面的代码）上试用了该应用程序，它运行良好。但是一旦我想将它复制到可穿戴应用程序，就没有任何效果。我在可穿戴应用程序上所做的唯一不同是在清单中

<uses-feature android:name="android.hardware.type.watch" />

这是适用于手持设备但不适用于穿戴式设备的应用程序代码。

清单：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="de.demo.firstdatabaseapp" >

    <uses-permission android:name="android.permission.INTERNET" />


    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

主要活动：

package de.demo.firstdatabaseapp;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.os.StrictMode;
import android.os.Vibrator;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;


public class MainActivity extends Activity {

    Button bSubmit;

    @SuppressLint("NewApi")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy);


        setContentView(R.layout.activity_main);


        bSubmit = (Button) findViewById(R.id.buttonSubmit);


        // This where the Values get entered inside the database
        bSubmit.setOnClickListener(new View.OnClickListener() {


            InputStream is = null;

            @Override
            public void onClick(View arg0) {
                // Storing the values inside the editTexts inside the string variables
                String name = "Chuck";
                String age = "42";
                String email = "Norris@awesomeness.com";

                //Setting the nameValuePairs
                List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1);
                //Adding the string variabls inside the nameValuePairs
                nameValuePairs.add(new BasicNameValuePair("name", name));
                nameValuePairs.add(new BasicNameValuePair("age", age));
                nameValuePairs.add(new BasicNameValuePair("email", email));

                // Setting up the connection inside the try catch block

                try{
                    //Setting up the default http client
                    HttpClient httpClient = new DefaultHttpClient();

                    //Setting up the http post method and passing the url in case
                    // of online database and the ip address in case of localhost database.
                    //And the php file which serves as the link between the android app
                    // and the database

                    HttpPost httpPost = new HttpPost("http://---.---.-.--:8888/tutorial.php");

                    //Passing the nameValuePairs inside the httpPost
                    httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs));

                    //Getting the response
                    HttpResponse response = httpClient.execute(httpPost);

                    //Setting up the entity
                    HttpEntity entity = response.getEntity();

                    //Setting up the content inside an input stream reader
                    is = entity.getContent();

                    //Displaying a toast if the data is entered successfully
                    String msg = "Data entered successfully";
                    Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_LONG).show();
                }
                //Writing the catch blocks to handle the exceptions
                catch (ClientProtocolException e)
                {
                    Log.e("ClientProtocol", "Log_tag");
                    e.printStackTrace();
                }

                catch (IOException e)
                {
                    Log.e("Log_tag", "IOException");
                    e.printStackTrace();
                }
            }
        });



    }

}

布局：

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"

    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"

    tools:context=".MainActivity">

    <Button
        android:id="@+id/buttonSubmit"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Submit"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="5dp" />

</RelativeLayout>

Answer 1

大多数可穿戴设备目前不支持直接互联网连接，因此尝试 upload/download 从 Wear 应用程序进行任何操作都行不通。

您应该使用 Data Layer API 将要保存的数据发送到手持设备上的配套应用程序，然后该应用程序可以进行上传并让 Wear 应用程序知道操作完成后发生的结果完成。

Answer 2

我可以使用 Teleport 库 (github.com/Mariuxtheone/Teleport) 解决我的问题，因此可以将磨损的数据通过 phone 发送到数据库。

我的 wear (Samsung Gear Live) 没有t support a direct internet connection. In my case I need to send it first via Bluetooth to the handheld. That造成在手持设备和 wear 上使用代码的区别。

有关更多信息，我发现这个关于数据同步的演讲非常有趣 -> https://www.youtube.com/watch?v=jbbKCfCIyFA

使用（提交和请求）具有 Android 可穿戴设备的数据库

Using (Submission and request) a database with a Android wearable

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android

button

sql-update

wear-os