《android上传图片》
浏览数：19 /
时间：2015年06月11日
这是主函数
package com.zmb.updemo;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.UUID;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.ContentResolver;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.TextView;
public class MainActivity extends Activity implements OnClickListener{
private Button mBtnUpload,whether;
private ProgressBar mPgBar;
private TextView mTvProgress;
private Button choose;
private ImageView imageView;
private File file;
private UpLoadTask upLoadTask;
private static final int TIME_OUT = 120*10000000; //超时时间
private static final String CHARSET = "utf-8"; //设置编码
private static final String RequestURL="http://192.168.0.164:9580/ekp/TestServlet";
private AlertDialog dialog;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mBtnUpload = (Button)findViewById(R.id.uploadImage);
choose = (Button)findViewById(R.id.selectImage);
imageView=(ImageView) findViewById(R.id.imageView);
mBtnUpload.setOnClickListener(this);
choose.setOnClickListener(this);
View upView = getLayoutInflater().inflate(R.layout.progress_bar_item, null);
mPgBar = (ProgressBar)upView.findViewById(R.id.pb_filebrowser_uploading);
mTvProgress = (TextView)upView.findViewById(R.id.tv_filebrowser_uploading);
whether = (Button)upView.findViewById(R.id.upload_over);
whether.setOnClickListener(this);
dialog=new AlertDialog.Builder(MainActivity.this).setView(upView).create();
}
private class UpLoadTask extends AsyncTask<Void, Integer, String>{
@Override
protected void onPostExecute(String result) {
mTvProgress.setText(result);
whether.setText("确定");
}
@Override
protected void onPreExecute() {
dialog.show();
mTvProgress.setText("正在上传图片...");
whether.setText("取消");
}
@Override
protected void onProgressUpdate(Integer... values) {
Integer num=values[0];
mPgBar.setProgress(num);
mTvProgress.setText("正在上传图片..." + num + "%");
}
@Override
protected String doInBackground(Void...parem) {
String BOUNDARY = UUID.randomUUID().toString(); //边界标识 随机生成
String PREFIX = "--" , LINE_END = "\r\n";
String CONTENT_TYPE = "multipart/form-data"; //内容类型
try {
URL url = new URL(RequestURL);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(TIME_OUT);
conn.setConnectTimeout(TIME_OUT);
conn.setDoInput(true); //允许输入流
conn.setDoOutput(true); //允许输出流
conn.setUseCaches(false); //不允许使用缓存
conn.setRequestMethod("POST"); //请求方式
conn.setRequestProperty("Charset", CHARSET); //设置编码
conn.setRequestProperty("connection", "keep-alive");
conn.setRequestProperty("Content-Type", CONTENT_TYPE + ";boundary=" + BOUNDARY);
if(file!=null)
{
/**
* 当文件不为空，把文件包装并且上传
*/
OutputStream outputSteam=conn.getOutputStream();
DataOutputStream dos = new DataOutputStream(outputSteam);
StringBuffer sb = new StringBuffer();
sb.append(PREFIX);
sb.append(BOUNDARY);
sb.append(LINE_END);
/**
* 这里重点注意：
* name里面的值为服务器端需要key 只有这个key 才可以得到对应的文件
* filename是文件的名字，包含后缀名的 比如:abc.png
*/
sb.append("Content-Disposition: form-data; name=\"img\"; filename=\""+file.getName()+"\""+LINE_END);
sb.append("Content-Type: application/octet-stream; charset="+CHARSET+LINE_END);
sb.append(LINE_END);
dos.write(sb.toString().getBytes());
InputStream fis = new FileInputStream(file);
long total = fis.available();
String totalstr = String.valueOf(total);
Log.d("文件大小", totalstr);
byte[] buffer = new byte[8192]; // 8k
int count = 0;
int length = 0;
while ((count = fis.read(buffer)) != -1) {
dos.write(buffer, 0, count);
length += count;
publishProgress((int) ((length / (float) total) * 100));
//为了演示进度,休眠50毫秒
Thread.sleep(50);
}
fis.close();
dos.write(LINE_END.getBytes());
byte[] end_data = (PREFIX+BOUNDARY+PREFIX+LINE_END).getBytes();
dos.write(end_data);
dos.flush();
/**
* 获取响应码 200=成功
* 当响应成功，获取响应的流
*/
int res = conn.getResponseCode();
if(res==200)
{
return "上传成功!";
}
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
return "上传失败!";
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public void onClick(View v) {
int id=v.getId();
switch (id) {
case R.id.selectImage:
/***
* 这个是调用android内置的intent，来过滤图片文件 ，同时也可以过滤其他的
*/
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
//回调图片类使用的
startActivityForResult(intent, RESULT_CANCELED);
break;
case R.id.upload_over:
if("确定".equals(whether.getText()+"")){
dialog.dismiss();
}else{
upLoadTask.cancel(true);
dialog.dismiss();
}
break;
default:
/* //这里的view是上传进度的弹框
//AsyncTask的实例
upLoadTask=new UpLoadTask();
upLoadTask.execute();*/
HttpClient client = new DefaultHttpClient();
HttpGet get = new HttpGet("http://192.168.0.164:9580/ekp/TestServlet");
try {
HttpResponse response = client.execute(get);
BufferedReader reader = new BufferedReader(new InputStreamReader(
response.getEntity().getContent()));
for (String s = reader.readLine(); s != null; s = reader.readLine()) {
System.out.println("------------------??????");
}
} catch (Exception e) {
e.printStackTrace();
}
break;
}
}
/**
* 回调执行的方法
*/
@SuppressWarnings("deprecation")
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if(resultCode==Activity.RESULT_OK)
{
/**
* 当选择的图片不为空的话，在获取到图片的途径
*/
Uri uri = data.getData();
try {
String[] pojo = {MediaStore.Images.Media.DATA};
Cursor cursor = managedQuery(uri, pojo, null, null,null);
if(cursor!=null)
{
ContentResolver cr = this.getContentResolver();
int colunm_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
String path = cursor.getString(colunm_index);
/***
* 这里加这样一个判断主要是为了第三方的软件选择，比如：使用第三方的文件管理器的话，你选择的文件就不一定是图片了，这样的话，我们判断文件的后缀名
* 如果是图片格式的话，那么才可以
*/
if(path.endsWith("jpg")||path.endsWith("png"))
{
file=new File(path);
Bitmap bitmap = BitmapFactory.decodeStream(cr.openInputStream(uri));
imageView.setImageBitmap(bitmap);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 回调使用
*/
super.onActivityResult(requestCode, resultCode, data);
}
}
主配置文件
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <Button android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="选择图片" android:id="@+id/selectImage" /> <Button android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="上传图片" android:id="@+id/uploadImage" /> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/imageView" /> </LinearLayout>
还有一个进度条的配置文件
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:orientation="vertical" > <ProgressBar android:id="@+id/pb_filebrowser_uploading" style="?android:attr/progressBarStyleHorizontal" android:layout_width="match_parent" android:layout_height="wrap_content"/> <TextView android:id="@+id/tv_filebrowser_uploading" android:layout_width="match_parent" android:layout_height="wrap_content"/> <Button android:id="@+id/upload_over" android:layout_width="match_parent" android:layout_height="wrap_content"/> </LinearLayout>
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