Start Activity When Boot Completed

public class mReceiver extends BroadcastReceiver {

    @Override 
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED)) {
            Log.d("tag", "boot ok"); 
            Intent i = new Intent(context, sampleActivity.class); 
            i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 
            context.startActivity(i); 
        } 
    } 
}

Need Uses Permission : android.permission.RECEIVE_BOOT_COMPLETED

edittext 특수문자 제한, 한글만 입력

// 영문 + 숫자 
public InputFilter filterAlphaNum = new InputFilter() {
    public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
        Pattern ps = Pattern.compile("^[a-zA-Z0-9]*$"); 
        if (!ps.matcher(source).matches()) { 
            return ""; 
        } 
        return null; 
    } 
}; 

// 한글 
public InputFilter filterKor = new InputFilter() {
    public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
        Pattern ps = Pattern.compile("^[ㄱ-ㅣ가-힣]*$"); 
        if (!ps.matcher(source).matches()) { 
            return ""; 
        } 
        return null; 
    } 
}; 


editText.setFilters(new InputFilter[]{filterAlphaNum}); 

패키지 정보 가져오기

ArrayList<PackageInfo> packages = new ArrayList<PackageInfo>(); 
PackageManager pm; 

void getPackeges() { 
    pm = (PackageManager) this.getPackageManager(); 
    List<PackageInfo> allPackages = pm.getInstalledPackages(PackageManager.GET_PERMISSIONS);

    for (int i = 0; i < allPackages.size(); i++)
        if (!isSystemApplication(allPackages.get(i))) 
            packages.add(allPackages.get(i)); 
} 

boolean isSystemApplication(PackageInfo packinfo) { 
    return (packinfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0 ? true : false;
}

Install, Uninstall 소스

Uri uri = Uri.fromParts("package", packageName, null);    
Intent i = new Intent(Intent.ACTION_DELETE, uri);    
startActivity(i);

Uri uri= Uri.fromParts("package", packageName , null); 
Intent i = new Intent(Intent.ACTION_PACKAGE_ADDED, uri); 
startActivity(i);

터치 좌표, 터치 다운 이벤트

button.setOnTouchListener(new OnTouchListener() { 
    @Override 
    public boolean onTouch(View v, MotionEvent event) {
        float x = event.getX(); 
        float y = event.getY(); 
        switch (event.getAction()) { 
        case MotionEvent.ACTION_DOWN: 

            break; 
        case MotionEvent.ACTION_UP: 
        } 
        return pressed; 
    } 
});

screen capture

public void screenshot(View view) throws Exception {

    view.setDrawingCacheEnabled(true); 
    Bitmap screenshot = Bitmap.createBitmap(view.getDrawingCache()); 
    view.setDrawingCacheEnabled(false); 

    if (screenshot == null) { 
        Log.e("screencast", "error : could not get drawing cache..."); 
        return; 
    } 

    File dir = Environment.getExternalStorageDirectory(); 
    String baseName = "screencast"; 
    String extention = ".jpg"; 
    String filename = baseName + extention; 

    try { 
        File f = new File(dir, filename); 
        f.createNewFile(); 

        OutputStream outStream = new FileOutputStream(f); 

        screenshot.compress(Bitmap.CompressFormat.JPEG, 80, outStream);
        outStream.flush(); 
        outStream.close(); 

        Log.d("screencast", "captured to " + f.getPath() + "(" + f.length() + "byte)"); 

    } catch (IOException e) { 
        e.printStackTrace(); 
    } 
}

StartActivity, StartService

Intent i = new Intent(currentActivity.this, targetActivity.class); 
startActivity(i); 


Intent i = new Intent(currentActivity.this, targetService.class);
startService(i);

Button setOnclickListener

button.setOnClickListener(new OnClickListener() { 
    public void onClick(View v) {
       

    } 
});

getLocalIPAddressList

private ArrayList<String> getLocalIPAddressList() {
    ArrayList<String> mAddress = new ArrayList<String>(); 
    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() && (inetAddress instanceof Inet4Address)) {
                     
                        mAddress.add(inetAddress.getHostAddress().toString()); 
                } 
            } 
        } 
    } catch (SocketException e) { 
        Log.e(TAG, "Fail to get IP Address : " + e); 
    } 

    return mAddress; 
}