Android Network网络数据存储

通过网络来获取和保存数据资源，这个方法需要设备保持网络连接状态，所以相对存在一些限制。将数据存储到网络上的方法很多，比如将要保存的数据以文件的方式上传到服务器、发送邮件等等。代码示例如下：

import java.io.BufferedInputStream;

import java.io.IOException;

import java.io.InputStream;

import java.net.MalformedURLException;

import java.net.URL;

import java.net.URLConnection;

import org.apache.http.util.ByteArrayBuffer;

import android.net.Uri;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.TextView;

import android.app.Activity;

import android.content.Context;

import android.content.Intent;

public class MainActivity extends Activity {

 private Button button1;

 private Button button2;

 private TextView textView;

 private int miCount = 0;

 private Context mContext;

 private OnClickListener listener = new OnClickListener() {

  @Override

  public void onClick(View v) {

   // TODO Auto-generated method stub

   switch (v.getId()) {

   case R.id.button1:

    Uri uri = Uri.parse("www.baidu.com");

    Intent intent = new Intent(Intent.ACTION_SEND,uri);

    intent .putExtra(Intent.EXTRA_SUBJECT, "数据备份");

    intent .putExtra(Intent.EXTRA_TEXT, "本次计数："+(miCount++));

    mContext.startActivity(intent);

    textView.setText("send sucess");

    break;

   case R.id.button2:

    String myString = null;

    try {

     //定义我们要访问的地址

     URL url = new URL("http://192.168.1.110:8080/android.txt");

     //打开这个url链接

     URLConnection conn = url.openConnection();

     //从上面的链接中获得输入流

     InputStream inputStream = conn.getInputStream();

     BufferedInputStream bis = new BufferedInputStream(inputStream);

     ByteArrayBuffer bab = new ByteArrayBuffer(100);

     int current = 0;

     //一直读到最后

     while((current = bis.read()) != -1){

      bab.append((byte)current);

     }

     myString = new String(bab.toByteArray());

    } catch (MalformedURLException e) {

     // TODO Auto-generated catch block

     myString = e.getMessage();

    } catch (IOException e) {

     // TODO Auto-generated catch block

     myString = e.getMessage();

    }

    textView.setText(myString);

    break;

   default:

    break;

   }

  }

 };

 @Override

 protected void onCreate(Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);

  setContentView(R.layout.activity_main);

  init(this);

  setButtonClickListener();

 }

 private void setButtonClickListener() {

  // TODO Auto-generated method stub

  button1.setOnClickListener(listener);

  button2.setOnClickListener(listener);

 }

 private void init(Context context) {

  // TODO Auto-generated method stub

  mContext = context;

  button1 = (Button) findViewById(R.id.button1);

  button2 = (Button) findViewById(R.id.button2);

  textView = (TextView) findViewById(R.id.text_view);

 }

}