hpapi.blogspot.jp

2016年11月9日水曜日

Thread 練習

Thread 練習

https://paiza.io/projects/xrf-cg825CeFPxNDEjnKlg

import java.io.*;
import java.net.*;

public class Main {
public static void main(String[] args) throws Exception {
int i = 0;
for (i = 0; i < 90; i++) {
new Thread(new Runnable() {
public void run() {
long x = Thread.currentThread().getId();
new D().Down(x);
}
} ).start();
}
}
}

class D {
public D() {
}
public void Down(Long x) {
try {
URL u = new URL("http://www.yahoo.co.jp");
HttpURLConnection c = (HttpURLConnection)u.openConnection();
c.setConnectTimeout(3000);
c.setReadTimeout(3000);
c.setDoInput(true);
InputStream is = null;
c.setRequestMethod("GET");
if (c.getResponseCode() == 200) {
is = c.getInputStream();
BufferedReader br = new BufferedReader( new InputStreamReader(is));
System.out.println(Thread.currentThread().getName() + " : " + br.readLine());
// byte[] buf = new byte[1024];
// int len = 0;
// while((len = is.read(buf)) != -1 ){
// System.out.println("Thread:"+ x +"->"+ new String(buf,0,len));
// System.out.println(x);
// }
}
} catch (Exception e) {
e.printStackTrace();
}
}
}

Android 文件保存，文件读取

Android 文件保存，文件读取
使用内部存储
https://developer.android.com/guide/topics/data/data-storage.html#filesInternal

使用文件名称和操作模式调用 openFileOutput()。这将返回一个 FileOutputStream。
使用 write() 写入到文件。
使用 close() 关闭流式传输。

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
GetUser();
}

protected void GetUser() {
try {
FileInputStream fis = new FileInputStream(new File(this.getFilesDir(), "user.csv"));
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buff = new byte[1024];
int len = 0;
while ((len = fis.read(buff)) != -1) {
baos.write(buff, 0, len);
}
System.out.println(baos.toString());
JSONObject jde = new JSONObject(baos.toString());
TextView tv1 = (TextView) findViewById(R.id.textView2);
tv1.setText(jde.getString("userName"));
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}

protected void Userinfo() {
JSONObject j = new JSONObject();
JSONObject j2 = new JSONObject();
try {
j.put("userName", "sun");
j.put("password", "12345");
j2.put("phone1", "99999");
j2.put("Phone2", "88808880");
j.put("Phones", j2);
File f = new File(this.getFilesDir(), "user.csv");
FileOutputStream fos = new FileOutputStream(f);
fos.write((j.toString()).getBytes());
fos.close();
} catch (JSONException e) {
e.printStackTrace();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}

2016年11月8日火曜日

Android 下载JSON文体，解析为数组，自定义Adapter显示

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button bt = (Button) findViewById(R.id.button2);
bt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
new MyasyncTask().execute("http://cdefgab.web.fc2.com/song.json");
}
});
}

// 下载JSON文体，解析为数组，自定义Adapter显示。
public class MyasyncTask extends AsyncTask<String, Integer, List<String>> {
@Override
protected List<String> doInBackground(String... params) {
InputStream is = null;
ByteArrayOutputStream baos = null;
List<String> data = null;
try {
URL url = new URL(params[0]);
HttpURLConnection huc = (HttpURLConnection) url.openConnection();
huc.setConnectTimeout(3000);
huc.setReadTimeout(3000);
huc.setDoInput(true);
huc.setRequestMethod("GET");
baos = new ByteArrayOutputStream();
if (huc.getResponseCode() == 200) {
is = huc.getInputStream();
byte[] buffer = new byte[1024];
int len = 0;
while ((len = is.read(buffer)) != -1) {
baos.write(buffer, 0, len);
}
JSONObject js = new JSONObject(baos.toString());
JSONObject js2 = js.getJSONObject("photos");
JSONArray ja1 = js2.getJSONArray("photo");
data = new ArrayList<String>();
for (int i = 0; i < ja1.length(); i++) {
JSONObject js3 = ja1.getJSONObject(i);
data.add(js3.getString("title"));
}
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (JSONException e) {
e.printStackTrace();
} finally {
try {
if (is != null) {
is.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return data;
}

@Override
protected void onPostExecute(final List<String> strings) {
super.onPostExecute(strings);
ListView lv = (ListView) findViewById(R.id.listview);
// lv.setAdapter(new ArrayAdapter<String>(MainActivity.this,android.R.layout.simple_list_item_1,strings));
mya m = new mya(strings);
m.notifyDataSetChanged();
lv.setAdapter(m);

lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(MainActivity.this, strings.get(position), Toast.LENGTH_SHORT).show();
}
});
}
}

public class mya extends BaseAdapter {
private List<String> temp;

public mya(List<String> temp) {
this.temp = temp;
}

@Override
public int getCount() {
return temp.size();
}

@Override
public Object getItem(int position) {
return temp.get(position);
}

@Override
public long getItemId(int position) {
return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = null;
if (convertView == null) {
view = LayoutInflater.from(MainActivity.this).inflate(R.layout.myadapter1, null);
} else {
view = convertView;
}
TextView tv = (TextView) view.findViewById(R.id.textView5);
tv.setText(temp.get(position));
return view;
}
}
}

2016年11月7日月曜日

字节流转换字符流

字节流转换字符流

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
new XML().execute("null");
}

public class XML extends AsyncTask<String, Void, String> {

@Override
protected String doInBackground(String... params) {
try {
// URL u = new URL("http://download.oracle.com/technetwork/java/javase/6/docs/zh/api.zip");
URL u = new URL("http://cdefgab.web.fc2.com/song.json");
HttpURLConnection huc = (HttpURLConnection) u.openConnection();
huc.setConnectTimeout(3000);
huc.setReadTimeout(3000);
huc.setDoInput(true);
huc.setRequestMethod("GET");
// 字节流转换字符流方法
// if(huc.getResponseCode() == 200) {
// BufferedReader br = new BufferedReader(new InputStreamReader(huc.getInputStream(),"utf-8"));
// InputStream is = huc.getInputStream();
// InputStreamReader isr = new InputStreamReader(is,"utf-8");
// BufferedReader br = new BufferedReader(isr);
// String temp = null;
// while((temp = br.readLine()) != null){
// System.out.println("--------------");
// System.out.println(temp);
// }
// }

// 字节流缓冲方法
if (huc.getResponseCode() == 200) {
System.out.println("-----Astart");
BufferedInputStream bis = new BufferedInputStream(huc.getInputStream());
int i = 0;
byte[] buff = new byte[1024];
while ((i = bis.read(buff)) != -1) {
System.out.println("deta.length--" + i);
System.out.println(new String(buff, 0, i));
}
System.out.println("-----Aend");
}

if (huc.getResponseCode() == 200) {
System.out.println("-----Bstart");
InputStream is = huc.getInputStream();
byte[] buff = new byte[1024];
int len = 0;
while ((len = is.read(buff)) != -1) {
System.out.println("data.lenght" + len);
System.out.println(new String(buff, 0, len));
}
System.out.println("-----Bend");
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
}
}

2016年11月6日日曜日

AscnyTask 练习

public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private ProgressDialog pd;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

//设置一个下载进度条
pd = new ProgressDialog(this);
pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
pd.setProgress(0);
pd.setTitle("Downloadnow");

//设置响应事件
Button bt = (Button) findViewById(R.id.button);
bt.setOnClickListener(this);
Button bt2 = (Button) findViewById(R.id.button2);
bt2.setOnClickListener(this);
Button bt3 = (Button) findViewById(R.id.button3);
bt3.setOnClickListener(this);
Button bt4 = (Button) findViewById(R.id.button4);
bt4.setOnClickListener(this);
Button bt5 = (Button) findViewById(R.id.button5);
bt5.setOnClickListener(this);
}

@Override
public void onClick(View v) {
Img i = new Img();
System.out.println(v.getId());
switch (v.getId()) {
case R.id.button:
i.execute("http://image.i-voce.jp/files/article/main/s8AO3sFN_1438142266.jpg");
break;
case R.id.button2:
i.execute("http://pic.prepics-cdn.com/d75526b7cc13/41938040.jpeg");
break;
case R.id.button3:
i.execute("http://entertainment.rakuten.co.jp/movie/interview/kiritanimirei/img/interviewimg001.jpg");
break;
case R.id.button4:
i.execute("http://up.gc-img.net/post_img_web/2015/09/32f61210611d358bddc2784d875cf65e_4238.jpeg");
break;
case R.id.button5:
i.execute("http://lwoyr.com/wp-content/uploads/2015/06/20150618_5.jpg");
break;
}
}

public class Img extends AsyncTask<String, Integer, byte[]> {

@Override
protected byte[] doInBackground(String... params) {
byte[] reBate = null;
try {
URL url = new URL(params[0]);
HttpURLConnection huc = (HttpURLConnection) url.openConnection();
huc.setConnectTimeout(3000);
huc.setReadTimeout(3000);
huc.setDoInput(true);
huc.setRequestMethod("GET");

//用文件长度设置进度条的最大值
pd.setMax(huc.getContentLength());
if (huc.getResponseCode() == 200) {
InputStream is = huc.getInputStream();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
int len = 0;
byte[] buf = new byte[1024];
while ((len = is.read(buf)) != -1) {
baos.write(buf, 0, len);
publishProgress(baos.size());
}
reBate = baos.toByteArray();
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return reBate;
}

@Override
protected void onPreExecute() {
super.onPreExecute();
pd.show();
}

@Override
protected void onPostExecute(byte[] bytes) {
super.onPostExecute(bytes);
Bitmap bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
ImageView iv = (ImageView) findViewById(R.id.imageView2);
iv.setImageBitmap(bitmap);
pd.dismiss();
}

@Override
protected void onProgressUpdate(Integer... values) {
super.onProgressUpdate(values);
pd.setProgress(values[0]);
}
}
}

Android AsyncTask 异步任务下载图片并显示咋UI线程

Android AsyncTask 异步任务下载图片并显示咋UI线程

public class MainActivity extends AppCompatActivity {
private ImageView iv;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button bt = (Button) findViewById(R.id.button);
bt.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
iv = (ImageView) findViewById(R.id.imageView);
DownImg di = new DownImg(MainActivity.this, iv);
di.execute("url");
}
});
}
}

public class DownImg extends AsyncTask<String, Integer, byte[]> {
private ImageView iv;
private int file_length;
private Context context;
protected ProgressDialog pd;

public DownImg(Context context, ImageView iv) {
this.iv = iv;
this.context = context;
}

@Override
protected byte[] doInBackground(String... params) {
ByteArrayOutputStream bos = null;
try {
URL url = new URL("http://prw.kyodonews.jp/prwfile/release/M102245/201403149047/_prw_PI1fl_2o2KuN2D.jpg");
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
httpURLConnection.setConnectTimeout(3000);
httpURLConnection.setReadTimeout(3000);
httpURLConnection.setDoInput(true);
httpURLConnection.setRequestMethod("GET");
httpURLConnection.connect();
file_length = httpURLConnection.getContentLength();
if (httpURLConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {
InputStream is = httpURLConnection.getInputStream();
bos = new ByteArrayOutputStream();
byte[] buff = new byte[1024];
int len = 0;
while ((len = is.read(buff)) != -1) {
bos.write(buff, 0, len);
publishProgress(file_length,bos.size());
}
is.close();
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return bos.toByteArray();
}

@Override
protected void onPreExecute() {
super.onPreExecute();
pd = new ProgressDialog(context);
pd.setTitle("test");
pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
pd.setCancelable(true);
pd.setMax(100);
pd.setProgress(0);
pd.show();
}

@Override
protected void onProgressUpdate(Integer... values) {
super.onProgressUpdate(values);
pd.setMax(values[0]);
pd.setProgress(values[1]);
}

@Override
protected void onPostExecute(byte[] bytes) {
super.onPostExecute(bytes);
Bitmap bt = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
iv.setImageBitmap(bt);
pd.dismiss();
}
}

2016年11月4日金曜日

Android JSONObject 练习

Android JSONObject 练习

1. JSON链接
http://cdefgab.web.fc2.com/song.json

public class DownJson {

public void ejson() {
String data = jsonString();
HashMap<String, String> hh = new HashMap<String, String>();
HashMap<Integer, HashMap<String, String>> hl = new HashMap<Integer, HashMap<String, String>>();

try {
JSONObject js = new JSONObject(data);
JSONObject js2 = js.getJSONObject("photos");
hh.put("stat", js.getString("stat"));
hh.put("page", js2.getString("page"));
hh.put("pages", js2.getString("pages"));
hh.put("perpage", js2.getString("perpage"));
hh.put("total", js2.getString("total"));

String ja = js2.getString("photo");
JSONArray jaa = new JSONArray(ja);

for (int i = 0; i < jaa.length(); i++) {
JSONObject t1 = jaa.getJSONObject(i);
HashMap<String, String> hmt = new HashMap<String, String>();
hmt.put("id", t1.getString("id"));
hmt.put("owner", t1.getString("owner"));
hmt.put("secret", t1.getString("secret"));
hmt.put("server", t1.getString("server"));
hmt.put("farm", t1.getString("farm"));
hmt.put("title", t1.getString("title"));
hmt.put("ispublic", t1.getString("ispublic"));
hmt.put("isfriend", t1.getString("isfriend"));
hmt.put("isfamily", t1.getString("isfamily"));
hl.put(i, hmt);
}

System.out.println("-----------------------");
System.out.println(hl.get(0).get("title"));
System.out.println("-----------------------");
} catch (JSONException e) {
e.printStackTrace();
}
}

public static String jsonString() {
String jstring = null;
InputStream is = null;
try {
URL u = new URL("http://cdefgab.web.fc2.com/song.json");
HttpURLConnection h = (HttpURLConnection) u.openConnection();
h.setRequestMethod("GET");
h.setDoInput(true);
h.setConnectTimeout(3000);
h.setReadTimeout(3000);
if (h.getResponseCode() == 200) {
byte[] buff = new byte[1024];
int len = 0;
is = h.getInputStream();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
while ((len = is.read(buff)) != -1) {
baos.write(buff, 0, len);
}
jstring = baos.toString("utf-8");
is.close();
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (is != null) {
is.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return jstring;
}
}

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