android 通知里面的进度如何走动

Question

如题所述

Answer 1

实现在android实现带进度条的上传效果效果如图：

用到以下两个类就可实现带进度条的文件上传：

1、CustomMultiPartEntity extends MultipartEntity, 

2、HttpMultipartPost extends AsyncTask

代码如下：

 import java.io.FilterOutputStream;

import java.io.IOException;

import java.io.OutputStream;

import java.nio.charset.Charset;

import org.apache.http.entity.mime.HttpMultipartMode;

import org.apache.http.entity.mime.MultipartEntity;

 

public class CustomMultipartEntity extends MultipartEntity {

    private final ProgressListener listener;

    public CustomMultipartEntity(final ProgressListener listener) {

        super();

        this.listener = listener;

    }

    public CustomMultipartEntity(final HttpMultipartMode mode, final ProgressListener listener)     {

        super(mode);

        this.listener = listener;

    }

    public CustomMultipartEntity(HttpMultipartMode mode, final String boundary,

            final Charset charset, final ProgressListener listener) {

        super(mode, boundary, charset);

        this.listener = listener;

    }

    @Override

    public void writeTo(final OutputStream outstream) throws IOException {

        super.writeTo(new CountingOutputStream(outstream, this.listener));

    }

    public static interface ProgressListener {

        void transferred(long num);

    }

 

    public static class CountingOutputStream extends FilterOutputStream {

        private final ProgressListener listener;

        private long transferred;

        public CountingOutputStream(final OutputStream out, final ProgressListener listener) {

            super(out);

            this.listener = listener;

            this.transferred = 0;

        }

        public void write(byte[] b, int off, int len) throws IOException {

            out.write(b, off, len);

            this.transferred += len;

            this.listener.transferred(this.transferred);

        }

        public void write(int b) throws IOException {

            out.write(b);

            this.transferred++;

            this.listener.transferred(this.transferred);

        }

    }

}

该类计算写入的字节数，我们需要在实现ProgressListener中的trasnfered()方法，更行进度条

 

public  class HttpMultipartPost extends AsyncTask<HttpResponse, Integer, TypeUploadImage> {

 

    ProgressDialogpd;

 

    longtotalSize;

 

    @Override

    protectedvoidonPreExecute(){

        pd= newProgressDialog(this);

        pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);

        pd.setMessage("Uploading Picture...");

        pd.setCancelable(false);

        pd.show();

    }

 

    @Override

    protectedTypeUploadImagedoInBackground(HttpResponse... arg0) {

        HttpClienthttpClient = newDefaultHttpClient();

        HttpContexthttpContext = newBasicHttpContext();

        HttpPosthttpPost = newHttpPost("http://herpderp.com/UploadImage.php");

 

        try{

            CustomMultipartEntitymultipartContent = newCustomMultipartEntity(

                    newProgressListener() {

 

                        @Override

                        public void transferred(longnum){

                            publishProgress((int) ((num / (float) totalSize) * 100));

                        }

                    });

 

            // We use FileBody to transfer an image

            multipartContent.addPart("uploaded_file", newFileBody(

                    newFile(m_userSelectedImagePath)));

            totalSize= multipartContent.getContentLength();

 

            // Send it

            httpPost.setEntity(multipartContent);

            HttpResponseresponse = httpClient.execute(httpPost, httpContext);

            String serverResponse = EntityUtils.toString(response.getEntity());

 

            ResponseFactoryrp = newResponseFactory(serverResponse);

            return(TypeImage) rp.getData();

        }

 

        catch(Exception e) {

            System.out.println(e);

        }

        returnnull;

    }

 

    @Override

    protectedvoidonProgressUpdate(Integer... progress){

        pd.setProgress((int) (progress[0]));

    }

 

    @Override

    protectedvoidonPostExecute(TypeUploadImageui) {

        pd.dismiss();

    }

}

在 transferred()函数中调用publishProgress((int) ((num / (float) totalSize) * 100));

在onProgressUpdate()实现上传进度的更新操作

Answer 2

通知栏显示所用到的布局文件content_view.xml

<?xml version="1.0" encoding="utf-8"?>
< RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#00000000"
android:orientation="vertical"
android:padding="5dp">

<ImageView
android:id="@+id/content_view_image"
android:layout_width="25dp"
android:layout_height="25dp"
android:src="@drawable/logo"

/>
<TextView
android:id="@+id/content_view_text1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="0%"
android:textColor="#000000"
android:layout_toRightOf="@id/content_view_image"
android:layout_centerHorizontal="true"
android:layout_marginTop="5dp"
android:layout_marginLeft="15dp"
/>
<ProgressBar
android:id="@+id/content_view_progress"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
style="@android:style/Widget.ProgressBar.Horizontal"
android:max="100"
android:layout_below="@id/content_view_image"
android:layout_marginTop="4dp"
/>

< /RelativeLayout>
主运行类：
[java]
package yyy.testandroid4;

import java.util.Timer;
import java.util.TimerTask;

import android.app.Activity;
import android.app.AlertDialog.Builder;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.RemoteViews;
import android.widget.Toast;

public class TestAndroid4Activity extends Activity {

private Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
super.handleMessage(msg);
switch (msg.what) {
case 0:
notif.contentView.setTextViewText(R.id.content_view_text1, len+"%");
notif.contentView.setProgressBar(R.id.content_view_progress, 100, len, false);
manager.notify(0, notif);

break;
case 1:
Toast.makeText(TestAndroid4Activity.this, "下载完成", 0).show();
break;
default:
break;
}
}

};

private Button update,cancel;
private int localVersion,serverVersion;
private int len;
private NotificationManager manager;
private Notification notif;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

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

update.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
//点击通知栏后打开的activity
Intent intent = new Intent(TestAndroid4Activity.this,OtherActivity.class);

PendingIntent pIntent = PendingIntent.getActivity(TestAndroid4Activity.this, 0, intent, 0);
manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
notif = new Notification();
notif.icon = R.drawable.logo;
notif.tickerText = "新通知";
//通知栏显示所用到的布局文件
notif.contentView = new RemoteViews(getPackageName(), R.layout.content_view);
notif.contentIntent = pIntent;
manager.notify(0, notif);
new DownLoadThread().start();
}
});

}
}

private class DownLoadThread extends Thread{
private Timer timer = new Timer();
@Override
public void run() {
// TODO Auto-generated method stub
super.run();
timer.schedule(new TimerTask() {
@Override
public void run() {
// TODO Auto-generated method stub

Message msg = new Message();
msg.what = 0;
msg.obj = len;
handler.sendMessage(msg);

if(len == 100){
timer.cancel();
handler.sendEmptyMessage(1);
}

}
}, 0, 1000);
len = 0;
try {
while(len < 100){
len++;
Thread.sleep(1000);
}
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

}

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