Screen on

I try screen on. I would like to keep screen for development.

If I keep screen on

getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

source code is here.




If don't keep screen on

getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

source code is here.
Please suggest your android issue by twitter or mail, I would try to clear up your issue.

Java File I/O

Java Info

FileWriter, write text.
FileReader, read text

FileOutputStream, write binary

FileInputStream, read binary.

Record Web Start Time

I try Date Class. I create app of "record web start time" to check Date Class.
The app have the time of pushing "Web Start" button.

I get now time.

SimpleDateFormat  sdf = new SimpleDateFormat("yyyy'　/'MM'/'dd'/ 'HH':'mm':'ss':'");  
Date  date = new Date();  

I get previous time of pushing "Web Start" button. I use SharedPreferences Class.

SharedPreferences pref = getSharedPreferences("pref", MODE_WORLD_READABLE|MODE_WORLD_WRITEABLE);
String votetime = pref.getString("votetime", sdf.format(date));

I preview previous time.

TextView prevvotetime = (TextView)findViewById(R.id.text1);
prevvotetime.setText(votetime);

If pushing "Web Start" button, I update time.
set listener.

Button votebutton = (Button)findViewById(R.id.button1);
votebutton.setOnClickListener(new View.OnClickListener() {

 @Override
 public void onClick(View v) {
 }
});

I update time and save time to SharedPreferences .

SimpleDateFormat  sdf = new SimpleDateFormat("yyyy'　/'MM'/'dd'/ 'HH':'mm':'ss':'");  
Date  date = new Date(); 

SharedPreferences pref = getSharedPreferences("pref", MODE_WORLD_READABLE|MODE_WORLD_WRITEABLE);
Editor e = pref.edit();
e.putString("votetime", sdf.format(date));
e.commit();

source code is here.
apk is here.
Please suggest your android issue by twitter or mail, I would try to clear up your issue.

Web Browser

I try WebView class.

donwload apk.

set setWebViewClient for no intent WEB BROWSER.

WebView w = (WebView)findViewById(R.id.webView1);
w.setWebViewClient(new WebViewClient());

enable javascript.

w.getSettings().setJavaScriptEnabled(true);

add Zoom Control

w.getSettings().setBuiltInZoomControls(true);

If app finish to load web page, call callback. I register callback.

w.setWebViewClient(new webclient());

and callback function by WebViewClient. If call onPageFinish, app update url text and app focus web page.

public class webclient extends WebViewClient {
    @Override
    public void onPageFinished(WebView view, String url) {
        setProgressBarIndeterminateVisibility(false);
        WebView w = (WebView)findViewById(R.id.webView1);
  TextView t = (TextView)findViewById(R.id.editText1);
  String u = w.getUrl();
  t.setText(u);
  w.requestFocus();
    }
    @Override
    public void onPageStarted(WebView view, String url, Bitmap favicon) {
        setProgressBarIndeterminateVisibility(true);
    } 
}

If user push W button, app hide ime.

Button b = (Button)findViewById(R.id.button1);
b.setOnClickListener( new View.OnClickListener() {
 @Override
 public void onClick(View v) {
        EditText e = (EditText)findViewById(R.id.editText1);
        if (e.isFocused()) {
         WebView w = (WebView)findViewById(R.id.webView1);
  mI.hideSoftInputFromWindow(w.getWindowToken(), 0);

If user push W button, app jump url inputted by user.
If input text is not ".", app think text is search word.
If input text is not "http://", app add "http://" to url.

TextView t = (TextView)findViewById(R.id.editText1);
if (!t.getText().toString().matches(".")){
 w.loadUrl("http://www.google.co.jp/search?q=" + t.getText().toString());
} else if (!t.getText().toString().startsWith("http://")) {
 w.loadUrl("http://" + t.getText().toString());
} else {
 w.loadUrl(t.getText().toString());
}

If user input url text, app foucs text all.

EditText e = (EditText)findViewById(R.id.editText1);
e.setOnFocusChangeListener(new View.OnFocusChangeListener() {
 
 @Override
 public void onFocusChange(View v, boolean hasFocus) {
  if (hasFocus == true) {
         EditText e = (EditText)findViewById(R.id.editText1);
   e.selectAll();
  }
 }
});

If user push back button, app go back's web page.

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
 if (keyCode == KeyEvent.KEYCODE_BACK) {
        WebView w = (WebView)findViewById(R.id.webView1);
        w.goBack();
        return true;
    }
    return super.onKeyDown(keyCode, event);
}

source code is here. Please suggest your android issue by twitter or mail, I would try to clear up your issue.

analysis mp4 file

I did mediaRecorder and ParcelFileDescriptor　class. and I analysis transfered file.

it is the blog.

I found description for ISO 14496-12 "ISO base media file format".
but analysis is difficult.

it is result.
xls file

ScaleImage

I did to scale Image on there.
But it is not scale on center, it is to scale on position( 0, 0).

I try to scale on center.

default position is (0. 0).
first, position move center at image

float mx = canvas.getWidth();
float my = canvas.getHeight();
canvas.translate(mx/2, my/2);

second, scale it.

canvas.scale(mScaleFactor, mScaleFactor);

final, take back.

canvas.translate(-(mx/2), -(my/2));

it is cool. source code is here. Please suggest your android issue by twitter or mail, I would try to clear up your issue.

move image

I try to move image in android.
I prepare the image.

int resid = context.getResources().getIdentifier("s066", "drawable", context.getPackageName());
mImage = context.getResources().getDrawable(resid);
mImage.setBounds(0, 0, mImage.getIntrinsicWidth(), mImage.getIntrinsicHeight() );

I prepare GestureDetector for getting onScroll event.

mGestureDetector = new GestureDetector(context, this);

I get touch event.

mGestureDetector.onTouchEvent(ev);

onScroll get moving position and call invalidate() for onDrow.

@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX,
  float distanceY) {
 Log.d("book", "distanceX=" + distanceX + "  distanceY=" + distanceY);
 mTranslateX -= distanceX;
 mTranslateY -=distanceY;
 invalidate();
 
 return false;
}

onDrow.

@Override
public void onDraw(Canvas canvas) {
 super.onDraw(canvas);
 
 canvas.save();
 canvas.translate(mTranslateX, mTranslateY);
 mImage.draw(canvas);
 
 canvas.restore();
}

source code is here. Please suggest your android issue by twitter or mail, I would try to clear up your issue.