android 通知里面的进度如何走动
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
<?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();
}
}
}
}
