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Download image file from URL to ImageView Java Android source example code.


Context context = thisClass.this;
Drawable image = ImageOperations(context,
"//www.okhelp.cz/images/android/ad_4.png"
,"image.jpg");
ImageView imgView;
imgView = (ImageView)findViewById(R.id.idImageView);
imgView.setImageDrawable(image);

	private Drawable ImageOperations(Context ctx, String url, String saveFilename) {
		try {
			InputStream is = (InputStream) this.fetch(url);
			Drawable d = Drawable.createFromStream(is, "src");
			return d;
		} catch (MalformedURLException e) {
			e.printStackTrace();
			return null;
		} catch (IOException e) {
			e.printStackTrace();
			return null;
		}
	}

	public Object fetch(String address) throws MalformedURLException,IOException {
		URL url = new URL(address);
		Object content = url.getContent();
		return content;
	}

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108

Turn screen ON OFF Android sample code | turn-screen-on-off-android-sample-code

WakeLock, PowerManager,uses-permission Android sample.
Main.java


public class Main extends Activity {
	    private SensorManager mSensorManager;
	    private PowerManager mPowerManager;
	    private WindowManager mWindowManager;
	    private WakeLock mWakeLock;
	    private Button button;
	    private TextView textView;

	    /** Called when the activity is first created. */
	    @Override
	    public void onCreate(Bundle savedInstanceState) {
	        super.onCreate(savedInstanceState);
try{
	        // Get an instance of the SensorManager
	        mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);

	        // Get an instance of the PowerManager
	        mPowerManager = (PowerManager) getSystemService(POWER_SERVICE);

	        // Get an instance of the WindowManager
	        mWindowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
	        mWindowManager.getDefaultDisplay();

	        // Create a bright wake lock
	        mWakeLock = mPowerManager.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK, getClass()
	                .getName());

	        setContentView(R.layout.main);
	        textView = (TextView)findViewById(R.id.textView1);
	        button = (Button)findViewById(R.id.button1);
	        button.setOnClickListener(mButtonStopListener);
	       
	        
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			Log.e("onCreate", e.getMessage());
		}
} // END onCreate
	    
	    View.OnClickListener mButtonStopListener = new OnClickListener() {
	    	public void onClick(View v) {
		        try {
					mWakeLock.release();
					textView.setText("mWakeLock.release()");
				} catch (Exception e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
					Log.e("onPause",e.getMessage());
				}
	    	
	    	}
	    };

	    @Override
	    protected void onResume() {
	        super.onResume();
	        /*
	         * when the activity is resumed, we acquire a wake-lock so that the
	         * screen stays on, since the user will likely not be fiddling with the
	         * screen or buttons.
	         */
	        
	        try {
				mWakeLock.acquire();
				textView.setText("mWakeLock.acquire()");
			} catch (Exception e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
				Log.e("onResume", e.getMessage());
			}

	    }

	    @Override
	    protected void onPause() {
	        super.onPause();

	        // and release our wake-lock
	        try {
				mWakeLock.release();
			} catch (Exception e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
				Log.e("onPause",e.getMessage());
			}
	    }
}

AndroidManifest.xml


<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="//schemas.android.com/apk/res/android"
      package="cz.okhelp.Main"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="7" />
    <uses-permission android:name="android.permission.HARDWARE_TEST"></uses-permission>
<uses-permission android:name="android.permission.VIBRATE"></uses-permission>

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

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".ScreenBrightnessActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>
</manifest>

302

WebView.loadData utf-8 encoding Android | webview-loaddata-utf-8-encoding-android

Try this solution:


String DATA = "Html text....bla bla bla. Hellou world!  čšřžěéá";
String HEADERHTML = 
"<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">" 
+"<html>  <head>  <meta http-equiv="content-type" content="text/html; charset=utf-8">"  
+"</head>  <body>";
String FOOTERHTML = "</body></html>";
WebView mWebView.loadData(HEADERHTML+DATA+FOOTERHTML,"text/html; charset=UTF-8",null);

321

View overrides onTouchEvent but not performClick | view-overrides-ontouchevent-but-not-performclick


public class Panel extends SurfaceView implements SurfaceHolder.Callback {
//............... code
//............... some code
   /**
     * Process the MotionEvent.
     */
    @Override
    public boolean onTouchEvent(MotionEvent event) {
    	
        synchronized (getHolder()) {
            if (event.getAction() == MotionEvent.ACTION_DOWN) {
            	performClick();
             } else if (event.getAction() == MotionEvent.ACTION_MOVE) {
            	if(_currentGraphic==null)return true;
                
            } else if (event.getAction() == MotionEvent.ACTION_UP) {
            }
            return true;
        }
    }
/////////////////////////////
 @Override
 public boolean performClick() {
  // Calls the super implementation, which generates an AccessibilityEvent
        // and calls the onClick() listener on the view, if any
        super.performClick();

        // Handle the action for the custom click here

        return true;
 }

}

204

AMOLED Display | amoled-display

Co je to AMOLED displej?
AMOLED ( active-matrix organic light-emitting diode ) je zobrazovací technologie pro použití v mobilních zařízeních a televizích. OLED je technologie velmi tenkých displejů, kde organické sloučeniny vytváří elektroluminiscenční materiál a aktivní matice umožňuje přesné adresování jednotlivých pixelů (bodů obrázku).
Od roku 2012, je AMOLED technologie používána v mobilních telefonech , multimediálních přehrávačích a digitálních fotoaparátech, což umožňuje nízkou spotřebu těchto zařízení a zvětšení velikosti displeje (např. až 40 palců).

AMOLED displej se skládá z aktivní matice OLED pixelů, které vytvářejí světlo při elektrické aktivaci a jsou uloženy do Thin Film Transistor (TFT) pole, které slouží, jako řada přepínačů pro ovládání proudu pro každý jednotlivý pixel a tím se dosáhne požadované barvy bodu a snížení spotřeby produ pro pasivní provoz matice OLED.

V TFT sběrnici se používá polykrystalický a amorfní křemík což umožňuje dosáhnout pružnosti a ohebnosti AMOLED displeje.

Video AMOLED display Samsung Omnia II
**VIDEO YOUTUBE

The Labeled continue statement Java example | the-labeled-continue-statement-java-example

The Labeled continue statement as goto Java example.


public class MainClass {
	public static void main(String[] arg) {
		String[] arrayOfString = { "Hello", "people", "hello", "world!" };
		OuterLoop: for (int e = 0; e < 4; e++) {
			for (int i = 0; i < arrayOfString.length; i++) {
				if (arrayOfString[i].equals("hello"))
					continue OuterLoop;
				System.out.println(arrayOfString[i]);
			}
		}
	}
}
/*
Hello
people
Hello
people
Hello
people
Hello
people
*/

Editace: 2013-12-09 13:25:41
Počet článků v kategorii: 396
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