发上等愿，结中等缘，享下等福；择高处立，就平处坐，向宽处行。
分类： 嵌入式
2012-04-11 21:54:56
一．知识点
1.遍历SD卡中某一路径下指定类型的图片
2.上传图片
二．代码解析
public class LocationPhoto extends Activity implements Runnable {
private Bundle bundle;
private Intent intent;
private String type = null;
private String dianya = null;
private String name = null;
Gallery g = null;
Button but1 = null;// 选择按钮
Button but2 = null;// 删除按钮
Button but3 = null;// 上传按钮
TextView text1 = null;// 命名Text
EditText edit1 = null;// 命名Edit
List
List
public String actionUrl = null;
public String dqPhoto = null;
public ProgressDialog myDialog=null;
private final String SD_PATH = android.os.Environment
.getExternalStorageDirectory().getAbsolutePath();
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.location_photo);
intent = getIntent();
bundle = intent.getExtras();
int num = bundle.getInt("selectType");
type = new TypeDianyaOptions().getSelectType(num);
dianya = new TypeDianyaOptions().getSelectDianYa(num);
g = (Gallery) findViewById(R.id.mygallery);
but1 = (Button) findViewById(R.id.but1);
but2 = (Button) findViewById(R.id.but2);
but3 = (Button) findViewById(R.id.but3);
text1 = (TextView) findViewById(R.id.newNameText);
edit1 = (EditText) findViewById(R.id.nameEdit);
g.setAdapter(new ImageAdapter(this, getSD()));
g.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView parent, View v,
int position, long id) {
dqPhoto = it.get(position);
Toast.makeText(LocationPhoto.this,
"序列：" + (position + 1) + "\n路径：" + it.get(position),
Toast.LENGTH_LONG).show();
}
});
//选择功能
but1.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if (dqPhoto == null) {
Toast.makeText(LocationPhoto.this, "点击锁定图片",
Toast.LENGTH_LONG).show();
} else if (seList.contains(dqPhoto)) {
dqPhoto = null;
Toast.makeText(LocationPhoto.this, "图片已在选择列",
Toast.LENGTH_LONG).show();
} else {
seList.add(dqPhoto);
dqPhoto = null;
Toast.makeText(LocationPhoto.this, "选择成功",
Toast.LENGTH_LONG).show();
}
}
});
//删除功能
but2.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
if (dqPhoto == null) {// 未选择图片时
Toast.makeText(LocationPhoto.this, "点击锁定图片",
Toast.LENGTH_LONG).show();
} else if (!seList.contains(dqPhoto)) {
dqPhoto = null;
Toast.makeText(LocationPhoto.this, "图片不在选择列中",
Toast.LENGTH_LONG).show();
} else {
if (seList.remove(dqPhoto)) {
dqPhoto = null;
Toast.makeText(LocationPhoto.this, "图片已从选择列中删除",
Toast.LENGTH_LONG).show();
} else {// 从选择列中删除失败
dqPhoto = null;
Toast.makeText(LocationPhoto.this, "图片删除失败",
Toast.LENGTH_LONG).show();
Toast.makeText(LocationPhoto.this,
"选择的数目：" + seList.size(), Toast.LENGTH_LONG)
.show();
}
}
}
});
//上传功能
but3.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
name = edit1.getText().toString();
actionUrl = ""
+ type + "&dianya=" + dianya + "&name=" + name;
if (seList != null && seList.size() > 0) {
if (name != null && name.length() > 0) {
myDialog=ProgressDialog.show(LocationPhoto.this, "请稍等", "正在执行上传请求中...");
Thread thread=new Thread(LocationPhoto.this);
thread.start();
} else {
Toast.makeText(LocationPhoto.this, "请填写杆号为图片命名！",
Toast.LENGTH_LONG).show();
}
} else {
Toast.makeText(LocationPhoto.this, "尚未选择上传图片！",
Toast.LENGTH_LONG).show();
}
}
});
}
//遍历SD卡中某一路径下指定类型的图片
private List
it = new ArrayList
File f = new File(SD_PATH + "//" + "jndlzp");
File[] files = f.listFiles();
for (int i = 0; i < files.length; i++) {
File file = files[i];
if (getImageFile(file.getPath()))
it.add(file.getPath());
}
return it;
}
//指定遍历文件类型
private boolean getImageFile(String fName) {
boolean re;
String end = fName
.substring(fName.lastIndexOf(".") + 1, fName.length())
.toLowerCase();
if (end.equals("jpg") || end.equals("gif") || end.equals("png")
|| end.equals("jpeg") || end.equals("bmp")) {
re = true;
} else {
re = false;
}
return re;
}
public class ImageAdapter extends BaseAdapter {
int mGalleryItemBackground;
private Context mContext;
private List
public ImageAdapter(Context c, List
mContext = c;
lis = li;
TypedArray a = obtainStyledAttributes(R.styleable.Gallery);
mGalleryItemBackground = a.getResourceId(
R.styleable.Gallery_android_galleryItemBackground, 0);
a.recycle();
}
public int getCount() {
return lis.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ImageView i = new ImageView(mContext);
Bitmap bm = BitmapFactory.decodeFile(lis.get(position).toString());
i.setImageBitmap(bm);
i.setScaleType(ImageView.ScaleType.FIT_XY);
i.setLayoutParams(new Gallery.LayoutParams(188, 288));
i.setBackgroundResource(mGalleryItemBackground);
return i;
}
}
public void run() {
// TODO Auto-generated method stub
try {
for (int i = 0; i < seList.size(); i++) {
uploadFile(actionUrl, seList.get(i));
}
handler.sendEmptyMessage(0);
} catch (Exception e) {
showDialog("上传失败！");
}
}
//Handler构建之后，会坚挺传来的信息代码
private Handler handler=new Handler(){
@Override
public void handleMessage(Message msg) {
// TODO Auto-generated method stub
myDialog.dismiss();
seList.clear();
showDialog("上传成功！");
}
};
public void uploadFile(String actionUrl, String uploadFile) {
String end = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
String nameStr = uploadFile.substring(uploadFile.lastIndexOf("/") + 1,
uploadFile.length());
try {
URL url = new URL(actionUrl);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
/* 允许Input、Output，不使用Cache */
con.setDoInput(true);
con.setDoOutput(true);
con.setUseCaches(false);
/* 设定传送的method=POST */
con.setRequestMethod("POST");
/* setRequestProperty */
con.setRequestProperty("Connection", "Keep-Alive");
con.setRequestProperty("Charset", "UTF-8");
con.setRequestProperty("Content-Type",
"multipart/form-data;boundary=" + boundary);
/* 设定DataOutputStream */
DataOutputStream ds = new DataOutputStream(con.getOutputStream());
ds.writeBytes(twoHyphens + boundary + end);
ds.writeBytes("Content-Disposition: form-data; "
+ "name=\"file1\";filename=\"" + nameStr + "\"" + end);
ds.writeBytes(end);
/* 取得文件的FileInputStream */
FileInputStream fStream = new FileInputStream(uploadFile);
/* 设定每次写入1024bytes */
int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
int length = -1;
/* 从文件读取数据到缓冲区 */
while ((length = fStream.read(buffer)) != -1) {
/* 将数据写入DataOutputStream中 */
ds.write(buffer, 0, length);
}
ds.writeBytes(end);
ds.writeBytes(twoHyphens + boundary + twoHyphens + end);
/* close streams */
fStream.close();
ds.flush();
/* 取得Response内容 */
InputStream is = con.getInputStream();
int ch;
StringBuffer b = new StringBuffer();
while ((ch = is.read()) != -1) {
b.append((char) ch);
}
/* 关闭DataOutputStream */
ds.close();
} catch (Exception e) {
}
}
public void showDialog(String mess) {
new AlertDialog.Builder(LocationPhoto.this).setTitle("Message")
.setMessage(mess).setNegativeButton("确定",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
}
}).show();
}
}
