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 最近有時(shí)間，整理了一下項(xiàng)目中常用到的代碼

Bitmap bitmapOrg = BitmapFactory.decodeResource(this.getContext().getResources(), R.drawable.moon);Matrix matrix = new Matrix();matrix.postRotate(-90);//旋轉(zhuǎn)的角度Bitmap resizedBitmap = Bitmap.createBitmap(bitmapOrg, 0, 0,                    bitmapOrg.getWidth(), bitmapOrg.getHeight(), matrix, true);BitmapDrawable bmd = new BitmapDrawable(resizedBitmap);

requestWindowFeature(Window.FEATURE_NO_TITLE);getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,                WindowManager.LayoutParams.FLAG_FULLSCREEN);

<activity android:name=".Login.NetEdit"  android:label="@string/label_net_Edit"             android:screenOrientation="portrait" android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen"><intent-filter>  <action android:name="android.intent.Net_Edit" />  <category android:name="android.intent.category.DEFAULT" /></intent-filter></activity>

Android:theme="@android:style/Theme.Dialog"

ConnectivityManager con=(ConnectivityManager)getSystemService(Activity.CONNECTIVITY_SERVICE);  boolean wifi=con.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isConnectedOrConnecting(); boolean internet=con.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).isConnectedOrConnecting(); 

<uses-permission Android:name="android.permission.ACCESS_NETWORK_STATE" />

public static boolean isIntentAvailable(Context context, String action) {    final PackageManager packageManager = context.getPackageManager();    final Intent intent = new Intent(action);    List<ResolveInfo> list =            packageManager.queryIntentActivities(intent,                    PackageManager.MATCH_DEFAULT_ONLY);    return list.size() > 0;}

try {   Intent intent = new Intent(Intent.ACTION_CALL);   intent.setData(Uri.parse("tel:+110"));   startActivity(intent);} catch (Exception e) {   Log.e("SampleApp", "Failed to invoke call", e);}

Intent i = new Intent(Intent.ACTION_SEND);  //i.setType("text/plain"); //模擬器請使用這行i.setType("message/rfc822") ; // 真機(jī)上使用這行i.putExtra(Intent.EXTRA_EMAIL, new String[]{"test@gmail.com","test@163.com});  i.putExtra(Intent.EXTRA_SUBJECT,"subject goes here");  i.putExtra(Intent.EXTRA_TEXT,"body goes here");  startActivity(Intent.createChooser(i, "Select email application."));

Intent viewIntent = new     Intent("android.intent.action.VIEW",Uri.parse("http://vaiyanzi.cnblogs.com"));startActivity(viewIntent);

public String getLocalIpAddress() {    try {        for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces();   en.hasMoreElements();) {            NetworkInterface intf = en.nextElement();            for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses();   enumIpAddr.hasMoreElements();) {                InetAddress inetAddress = enumIpAddr.nextElement();                if (!inetAddress.isLoopbackAddress()) {                    return inetAddress.getHostAddress().toString();                }            }        }    } catch (SocketException ex) {        Log.e(LOG_TAG, ex.toString());    }    return null;}

private Uri insertContact(Context context, String name, String phone) {       ContentValues values = new ContentValues();       values.put(People.NAME, name);       Uri uri = getContentResolver().insert(People.CONTENT_URI, values);       Uri numberUri = Uri.withAppendedPath(uri, People.Phones.CONTENT_DIRECTORY);       values.clear();       values.put(Contacts.Phones.TYPE, People.Phones.TYPE_MOBILE);       values.put(People.NUMBER, phone);       getContentResolver().insert(numberUri, values);       return uri;}

Intent intentBatteryUsage = new Intent(Intent.ACTION_POWER_USAGE_SUMMARY);        startActivity(intentBatteryUsage);

  public static String openFileFromRaw(Context context) throws IOException {        String content = "";        InputStream inputStream = context.getResources().openRawResource(R.raw.provinces);        if (inputStream != null) {            BufferedReader buffreader = new BufferedReader(new InputStreamReader(inputStream));            String line;            //分行讀取            try {                while ((line = buffreader.readLine()) != null) {                    content += line + "n";                }            } catch (IOException e) {                e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.            }            inputStream.close();        }          return content   ;    }

Display display = getWindowManager().getDefaultDisplay();int width = display.getWidth(); //寬int height = display.getHeight();  //高

  private void hideSoftInput() {        InputMethodManager imm = (InputMethodManager) this                .getSystemService(Context.INPUT_METHOD_SERVICE);        imm.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 0);    }

    public boolean onKeyDown(int keyCode, KeyEvent event) {        if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {            new AlertDialog.Builder(activity_login.this)                    .setTitle("退出系統(tǒng)")                    .setMessage("確定要退出系統(tǒng)嗎")                    .setPositiveButton("退出",                            new DialogInterface.OnClickListener() {                                public void onClick(DialogInterface dialog,                                                    int which) {                                    finish();                                }                            })                            // Leave                    .setNegativeButton("取消",                            new DialogInterface.OnClickListener() {                                public void onClick(DialogInterface dialog,                                                    int which) {                                    dialog.cancel();                                }                            }).show();        }        return false;    }

<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android">    <!-- pressed -->    <item android:state_pressed="true" android:drawable="@drawable/btn_press"/>    <!-- focused -->    <item android:state_focused="true" android:drawable="@drawable/btn"/>    <!-- default -->    <item android:drawable="@drawable/btn"/></selector>

private void close(Cursor cursor, SQLiteDatabase database){    try  {    if (cursor != null && !cursor.isClosed())                     {        cursor.close();                 }         }    catch (Exception e)               {}              try    {         dbHelper.closeDb(database);                  }                catch (Exception e)                {               }    }

public static String md5(String string) {        byte[] hash;        try {            hash = MessageDigest.getInstance("MD5").digest(string.getBytes("UTF-8"));        } catch (NoSuchAlgorithmException e) {            throw new RuntimeException("Huh, MD5 should be supported?", e);        } catch (UnsupportedEncodingException e) {            throw new RuntimeException("Huh, UTF-8 should be supported?", e);        }        StringBuilder hex = new StringBuilder(hash.length * 2);        for (byte b : hash) {            if ((b & 0xFF) < 0x10) hex.append("0");            hex.append(Integer.toHexString(b & 0xFF));        }        return hex.toString().toLowerCase();    }

public String[] getVersion(){      String[] version={"null","null","null","null"};      String str1 = "/proc/version";      String str2;      String[] arrayOfString;      try {          FileReader localFileReader = new FileReader(str1);          BufferedReader localBufferedReader = new BufferedReader(                  localFileReader, 8192);          str2 = localBufferedReader.readLine();          arrayOfString = str2.split("\s+");          version[0]=arrayOfString[2];//KernelVersion          localBufferedReader.close();      } catch (IOException e) {      }      version[1] = Build.VERSION.RELEASE;// firmware version      version[2]=Build.MODEL;//model      version[3]=Build.DISPLAY;//system version      return version;  } 

public String[] getOtherInfo(){      String[] other={"null","null"};         WifiManager wifiManager = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);         WifiInfo wifiInfo = wifiManager.getConnectionInfo();         if(wifiInfo.getMacAddress()!=null){          other[0]=wifiInfo.getMacAddress();      } else {          other[0] = "Fail";      }      other[1] = getTimes();         return other;  }  private String getTimes() {      long ut = SystemClock.elapsedRealtime() / 1000;      if (ut == 0) {          ut = 1;      }      int m = (int) ((ut / 60) % 60);      int h = (int) ((ut / 3600));      return h + " " + mContext.getString(R.string.info_times_hour) + m + " "             + mContext.getString(R.string.info_times_minute);  } 

package com.orange.cpu;import java.io.BufferedReader;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.IOException;import java.io.InputStream;public class CpuManager {  **   // 獲取CPU最大頻率（單位KHZ）     // "/system/bin/cat" 命令行     // "/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq" 存儲最大頻率的文件的路徑**        public static String getMaxCpuFreq() {                String result = "";                ProcessBuilder cmd;                try {                        String[] args = { "/system/bin/cat",                                        "/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq" };                        cmd = new ProcessBuilder(args);                        Process process = cmd.start();                        InputStream in = process.getInputStream();                        byte[] re = new byte[24];                        while (in.read(re) != -1) {                                result = result + new String(re);                        }                        in.close();                } catch (IOException ex) {                        ex.printStackTrace();                        result = "N/A";                }                return result.trim();        }         **// 獲取CPU最小頻率（單位KHZ）**        public static String getMinCpuFreq() {                String result = "";                ProcessBuilder cmd;                try {                        String[] args = { "/system/bin/cat",                                        "/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_min_freq" };                        cmd = new ProcessBuilder(args);                        Process process = cmd.start();                        InputStream in = process.getInputStream();                        byte[] re = new byte[24];                        while (in.read(re) != -1) {                                result = result + new String(re);                        }                        in.close();                } catch (IOException ex) {                        ex.printStackTrace();                        result = "N/A";                }                return result.trim();        }         **// 實(shí)時(shí)獲取CPU當(dāng)前頻率（單位KHZ）**        public static String getCurCpuFreq() {                String result = "N/A";                try {                        FileReader fr = new FileReader(                                        "/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq");                        BufferedReader br = new BufferedReader(fr);                        String text = br.readLine();                        result = text.trim();                } catch (FileNotFoundException e) {                        e.printStackTrace();                } catch (IOException e) {                        e.printStackTrace();                }                return result;        }       ** // 獲取CPU名字**        public static String getCpuName() {                try {                        FileReader fr = new FileReader("/proc/cpuinfo");                        BufferedReader br = new BufferedReader(fr);                        String text = br.readLine();                        String[] array = text.split(":\s+", 2);                        for (int i = 0; i < array.length; i++) {                        }                        return array[1];                } catch (FileNotFoundException e) {                        e.printStackTrace();                } catch (IOException e) {                        e.printStackTrace();                }                return null;        }}

public void getTotalMemory() {          String str1 = "/proc/meminfo";          String str2="";          try {              FileReader fr = new FileReader(str1);              BufferedReader localBufferedReader = new BufferedReader(fr, 8192);              while ((str2 = localBufferedReader.readLine()) != null) {                  Log.i(TAG, "---" + str2);              }          } catch (IOException e) {          }      }