package com.hit.changyou;
import android.app.Activity;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import org.kobjects.base64.Base64;
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;
import org.xmlpull.v1.XmlPullParserException;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnCancelListener;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BitmapFactory.Options;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.os.StatFs;
import android.text.method.ScrollingMovementMethod;
import android.util.Log;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
public class ARDetailActivity extends Activity {
private static final String TAG="ARDetailActivity";
protected static final int TASK_DONE = 0;
protected static final int TASK_CANCEL = 1;
protected static final int TASK_UNDONE = 2;
Handler handle;
String id=null;
private ImageView iv;
private TextView tv_desc;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.ardetail);
id = this.getIntent().getExtras().getString("ID");
String name = this.getIntent().getExtras().getString("NAME");
String desc = this.getIntent().getExtras().getString("DESC");
((TextView) this.findViewById(R.id.tv_Name)).setText(name);
tv_desc=((TextView) this.findViewById(R.id.tv_Desc));
tv_desc.setText(desc);
tv_desc.setMovementMethod(ScrollingMovementMethod.getInstance());
iv=(ImageView) findViewById(R.id.iv);
/*如果可用空间小于500KB，那么提示用户空间不足*/
if(getAvailaleSize()<500){
Toast lowStorageToast=Toast.makeText(this, "检测到您手机的存储空间不足,所以不进行图片缓存(这样每次加载图片时会耗费一些流量)",
Toast.LENGTH_LONG);
lowStorageToast.show();
}
wsAsyncTask wsTask = new wsAsyncTask(this);
wsTask.execute(id);
handle=new Handler(){
@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
super.handleMessage(msg);
switch(msg.what){
case TASK_DONE:
Log.v(TAG, "task is done");
iv.setImageBitmap((Bitmap)msg.obj);
// ((Bitmap)msg.obj).recycle();
/*
* 不加这句已经运行正常,加上后会异常终止,因为在这里
*释放它太早了,log显示此时Canvas还在使用它
*/
break;
case TASK_CANCEL:
Log.v(TAG, "task is cancelled");
iv.setImageResource(R.drawable.defaultimg);
break;
case TASK_UNDONE:
Log.v(TAG, "task is undone");
break;
}
}
};
}
/*获取外部存储可用空间*/
public static long getAvailaleSize(){
File path = Environment.getExternalStorageDirectory();
StatFs stat = new StatFs(path.getPath());
long blockSize = stat.getBlockSize();
long availableBlocks = stat.getAvailableBlocks();
return (availableBlocks * blockSize)/1024; //以KIB 单位
//(availableBlocks * blockSize)/1024 /1024 MIB单位
}
/*
* 这个函数会对图片的大小进行判断，并得到合适的缩放比例，比如2即1/2,3即1/3
*/
static int computeSampleSize(BitmapFactory.Options options, int tarWidth, int tarHeight) {
int realWidth = options.outWidth;
int realHeight = options.outHeight;
int candidateW = realWidth / tarWidth;
int candidateH = realHeight / tarHeight;
int candidate = Math.max(candidateW, candidateH);
if (candidate == 0){
Log.v(TAG, "realWidth:"+realWidth+" realHeight:" + realHeight +
" return " + candidate);
return 1;
}
/*以下部分是为了防止这种情况:如果width或height只有一个特别大,另一个与real值接近,那么得到的candidate
* 值是不准确,是过大的,所以要调整,适当将其减一*/
if (candidate > 1) {
if ((realWidth > tarWidth) && (realWidth / candidate) < tarWidth)
candidate -= 1;
}
if (candidate > 1) {
if ((realHeight > tarHeight) && (realHeight / candidate) < tarHeight)
candidate -= 1;
}
Log.v(TAG, "realWidth:"+realWidth+" realHeight:" + realHeight +
" return " + candidate);
return candidate;
}
private class wsAsyncTask extends AsyncTask<String, Integer, Bitmap> {
//应用在sd卡上的图片保存目录
String dir=Environment.getExternalStorageDirectory()+"/ARNavigator/images";
File mydir=null;
File file=null;
private Toast toast;
private Bitmap img=null;
private Drawable drawable=null;
private ProgressDialog progress;
/*
* 检查某图片是否已经在sdcard存在的方法
*/
boolean checkIfExist(String param){
mydir=new File(dir);
Log.v(TAG, "mydir is "+dir);
if(mydir.exists()){
Log.v(TAG, "mydir exists!");
file=new File(mydir, param+".jpg");
if(file.exists()){
Log.v(TAG, "file exists!");
drawable = Drawable.createFromPath(dir+"/"+param+".jpg");
if(drawable!=null){
Log.v(TAG, "drawable is not null!");
return true;
}
else{
Log.v(TAG, "drawable is null!");
return false;
}
}
}
return false;
}
/*
* 保存图片到sd卡
*/
void saveToSD(String param){
boolean tag_save=false;
if(!mydir.exists()){
if(!mydir.mkdirs()){
Log.v(TAG, "Cannot create the dir!");
}
else
tag_save=true;
}
else{
tag_save=true;
}
/*如果可用空间小于500KB，则不进行缓存*/
if(getAvailaleSize()<500){
tag_save=false;
}
if(tag_save==true){
//目录已经建好或已经存在
File file=new File(mydir, param+".jpg");
FileOutputStream fos;
try {
fos = new FileOutputStream(file);
img.compress(Bitmap.CompressFormat.JPEG, 100, fos);
Log.v(TAG, "save image to sdcard!");
fos.flush();
fos.close();
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public wsAsyncTask(Context context){
progress=new ProgressDialog(context);
progress.setProgressStyle(ProgressDialog.STYLE_SPINNER);
progress.setIndeterminate(false);
progress.setCancelable(true);
// progress.setCanceledOnTouchOutside(true); //设置是否可以点击屏幕停止加载,这样容易误操作,所以不用了
progress.setOnCancelListener(new OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
// TODO Auto-generated method stub
toast.setText("已取消图片加载");
toast.show();
wsAsyncTask.this.cancel(true);
}
});
progress.setMessage("图片加载中...");
progress.show();
toast=Toast.makeText(context, "按返回键可取消图片加载(如果您的网络状况很差)", Toast.LENGTH_LONG);
}
@Override
protected Bitmap doInBackground(String... params) {
// TODO Auto-generated method stub
if((checkIfExist(params[0]))==true){
img=((BitmapDrawable)drawable).getBitmap();
return img;
}
toast.show();
Log.v(TAG, "load img from web service!");
/*
* 用虚拟器运行时，IP可以是电脑的真实IP或者10.0.2.2；用真机运行时，要用真实IP而且与电脑要在同一个网段
* 127.0.0.1和local host代表虚拟器本身
*/
// String wsUrl="http://10.0.2.2:8080/axis2/services/picTransport?wsdl";
// String wsUrl="http://192.168.1.103:8080/axis2/services/picTransport?wsdl";
// String wsUrl="http://192.168.44.1:8080/axis2/services/picTransport?wsdl";
String wsUrl="http://photo.hit.edu.cn/axis2/services/picTransport?wsdl";
String wsNamespace="http://ws.apache.org/axis2";
String wsMethodname="fileDownload";
SoapObject request=new SoapObject(wsNamespace, wsMethodname);
request.addProperty("id", params[0]);
SoapSerializationEnvelope envelop=new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelop.bodyOut=request;
HttpTransportSE ht=new HttpTransportSE(wsUrl);
try {
ht.call(null, envelop);
if(envelop.getResponse()!=null){
Object result=envelop.getResponse();
byte[] buffer=Base64.decode(result.toString());
BitmapFactory.Options options=new Options();
options.inJustDecodeBounds = true;
//调用此方法得到options得到图片的大小
BitmapFactory.decodeByteArray(buffer, 0, buffer.length, options);
//我的目标是在大约400*480 pixel的画面上显示,所以调用computeSampleSize得到图片缩放的比例
options.inSampleSize = computeSampleSize(options, 480, 400);
//OK,得到了缩放的比例，现在开始正式读入BitMap数据
options.inJustDecodeBounds = false;
options.inDither=false; /*不进行图片抖动处理*/
options.inPreferredConfig=null; /*设置让解码器以最佳方式解码*/
img=BitmapFactory.decodeByteArray(buffer, 0, buffer.length, options);
saveToSD(params[0]);
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return img;
}
else{}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (XmlPullParserException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Bitmap result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
Log.v(TAG, "in on postExcute!");
progress.dismiss();
toast.cancel();
if(result!=null){
Message message=handle.obtainMessage();
message.what=TASK_DONE;
message.obj=result;
message.sendToTarget();
}
else{
Message message=handle.obtainMessage();
message.what=TASK_UNDONE;
message.sendToTarget();
}
}
@Override
protected void onCancelled() {
// TODO Auto-generated method stub
super.onCancelled();
Log.v(TAG, "task is cancelled!");
Message message=handle.obtainMessage();
message.what=TASK_CANCEL;
message.sendToTarget();
}
}
}